They probably dont have these in schools now because the guards around the rotating components would obscure the moving parts, thus defeating its purpose as a teaching tool. Keep up the good work Lyle and don't be afraid to tell us "too much".
You make me think of my father. He was midwest boy took to machining at the start of the war. Made a fine life for himself. I may stop by from time to time just to hear you talk machines and machining. Thank you for the videos.
I work in a motor repair shop. I wind armatures and machine bearing seats, and this is related to my career; but I still enjoy watching the expirimation and engineering. Thank you for putting this for anybody to watch, because this type of work is becoming a dying art.
Yeah, this is going to be a good series! I love this type of thing. When I was a kid, I was fascinated with electrical stuff. My grandfather had carwashes which he maintained and modified. I was a little kid (just walking and barely talking). He would talk to me about the relays, timers, contactors, motors and other parts - talking to me just like I was a grown adult. I did understand some of it, and I still think about those times. Now, I work on large diesel generators and their control systems - and love every minute of it!
25 years ago for a science fair project my Dad and I built a little DC motor out of a thread spool and some small copper wire wrapped around bar stock bent in a C shape. That was a lot of fun to build with him. We could never get the motor brushes just right all of the time so it didn't always run very well. Cool builds Mr. Pete.
An awesome demonstration of the basics of every electric motor ever made. You show many small things that could be expanded (magnetic brakes!) and items that suggest experimentation for a great science project. Mr. Tesla would be proud.
Fantastic video. brings back a lot of memories of the motor kit i got for Christmas. In that day we only got one present and that year was a electric motor kit. It ran off your electric train transformer. ( that I got the year before) One had to build this kit and it would run my Ferris wheel. (from my erector set i got previously) It was a great build and it's too bad no one offers these kits today. I also got a two tube radio kit one year that i built and could listen to short wave from all over the world. I was raised in Tomah WI. and we had a telephone exchange. I would go through there trash and find round dry cells that came out of crank wall telephones, that were still used on farms, and used them to make magnets and all kinds of other things. Good times, Cheers, Lee
I have been watching for quite a while now. All of your videos are worth their weight in gold. I have learned so much from watching them. My son and I even watched the magnet video.Very good information. I own a 1953 Logan and a 1968 Bridgeport .It is quite peaceful to go into the base meant and work on something. In fact today I did my first bolt circle. My son and I are going to build one of your wobbler steam engines . Please keep making the videos they are great .
Lots of nice toys. I never heard of a St Louis motor and I graduated just 2 years after you. I guess the science teachers around here liked other things better. I do remember gyroscopic demos and static electricity demos and vacuum demos and lots of other things but no St Louis motor. Thanks for the video.
Thank you Sir, I had as a child and still have as an old man a facination with these things. I am a hobby machinist and am trying to make them. Really looking forward to your series.
I watched the magnets video you made. I too am a magnet nerd, i have a large neodymium magnet at work stuck to my filing cabinet, everyone who asks what it is I say to them "If you can pull it off, you can have it!" It is still there to this day :) Its an inch and a half cube with around 240lb pull off force.
I remember building a motor in by secondary school science lab, taught by Mr Arthur New. Great Guy.That was a long tome ago!! Your video bought back some happy memories. Looking forward to this series MrP. Kind regards Garry from the UK (The English Bit)
This video brought back a great memory for me. We made dc motors in 4H. If I remember correctly they were very crude using enameled wire, some large nails, and a block of wood. The rotor was made from nails and the enameled wire and the brushes were just heavy gauge solid copper wire. Can't remember what was used for the fields but I'm sure it was a wound magnet. Have to see if my old 4H book is still at my parents house. Mike W.
myfordboy did a series if videos making a generator for his steam engine, but I was sorely disappointed to find out he used a commercially manufactured motor for his generator. eagerly looking forward to this series of videos!
Please continue to include - side bars, opinions, insightful questions, and laments in the videos. They're as much fun as the stuff I'm learning... and perhaps more practical.
Awesome video Tubalcain! Cant wait to watch the rest of the series!! And by the way, I have watched your videos on neodymium magnets several times and loved em!
Great video, looking forward to the series of videos , didn't get bored at all. Very informative, all your videos are great. You are a great teacher. Thanks for all you do. Jim
Well Mr Pete as ever highly entertaining and reminds me of my school days, how many of our kids don't get to see this? Personally there is something attractive about magnetism and its uses looking forward to part two!!!
Mr Pete, if you're building this as a dynamo instead of a motor to get the most power from it you'll want to use the most powerful magnets you can. Sorry if I'm preaching to the choir. I like yourself am just an old shop teacher (in electronics). Needless to say I love your videos!
From Martin UK I certainly watched your neo magnets video with great interest, & I also sent links to friends who also thought they were great. I'm 76, & still have a boys enthusiasm for experimenting, & watching all your interesting videos
You should have an iron holder for the magnets as it extends the magnetic field farther around the armature. You saw this effect by holding another magnet at the top of the wood dynamo and it sped up. The commutator should be able to help adjust for the powerful neodymium magnets and reverse the polarity of the armature at the correct moment. These look super fun to play with. I love your videos Mr. Pete!
I remember getting a DC motor kit as a child. As I remember it you wound the rotor and then assembled the components onto the lid of the box via some "staples" that poked through holes were folded over!
Love it! Where have all the shop Teachers gone? Are they still out there but look different in the advance of technology ? Your fantastic keep doing what you do just the way you want! with nothing in front of you you cane be extraordinary ! As you are thank you.
Please talk as long as you want about anything that you want. Those who don't like it can always skip ahead. The rest of us find your talks and demonstrations fascinating.
I enjoy all the digressions and asides. My own mind seems to work similarly - a dozen ideas a minute. Sometimes I can barely speak coherently as ten new ideas come to me as I try to explain the previous idea,
seems like the kind of project that would a great thing to build with an older child who's interested and wants to be "involved" in what you're doing in the shop..... I can remember building something very similar to this when I was a webelo scout. (and later helping younger guys when I became a boy scout...) the "locking up" problem you could probably fix by increasing the air gap between the armature and the magnets themselves.... fIner wire = more turns on the armature = stronger transient field to interact with.. Taking great care to keep the windings nearly coiled and not jumbled, also increases the field strength... the small motor needs a higher speed as LEDs require a certain minimum voltage to activate, so it would require a certain speed to create that voltage....
fond memories. I built a motor very similar when I was in the fifth or sixth grade for a science fair. If I remember right I got the plans from a popular science magazine and the wire from Radio Shack. The armature was made from a bolt and nuts with a hole drilled through the center of the bolt. If I remember rightly I got an A on it. I remember the grade because it was one of a very few A's I got in school other than shop and votech classes. One of the things that really aggravate me about schools today is the elimination of any type of practical education and the emphasis on every child going to college. I am an electrician / Mechanic at a Quaker Oats plant and actually enjoy my profession, Which is kind of unusual today. I repair machinery made from the 50's to state of the art stuff put in in the last year. I gained my skills from helping on the farm as a kid. Vocational classes in school Working in my uncles machine shop in high school and the US Navy training schools and on the job training. Although I did attend a Tech school a few years back and earned a degree in Industrial Technology I found about 95% of it as useless or stuff I learned years before through other means. Today I do everything From 3 phase 480V electrical and PLC to basic machining and fabrication.
I have made a few steam engines but never built anything to run off them. This looks like its going to be my next project, it looks very good and will be interesting to do. Look forward to the next video and thank you for sharing.
I truly enjoy these kind of items it takes me back to when I was a kid and I still love'm I guess Iam still a kid at heart LOL Great job Mrpete like always
Hello from Scotland, I noticed you apologized for your chat and the subject matter in the video, personally I found the whole video fascinating, educational and entertaining. Thank you for all your digressions, I'm off to watch part two.
Really excited for this series. I recently attempted to make a 3 pole brushed dc motor but it didn't work for some reason. Looking forward to learning more about the subject.
You were able to buy LEDs that changed from red to green with reversal of polarity, or yellow if AC power source used - I'm sure they are still available. These would be great to demonstrate reverse running. Great videos - thanks again Rod Australia.
Hello Lyle - Here in Connecticut - I want you to know about the Connecticut Antique Machinery Association ( C.A.M.A.) . They normally do a spring "power - up " show in order to kick-off the summer season but their crown jewel show is their fall show which is about as good as it gets as far as antique machinery displays anywhere in NewEngland. They have a Generator on display that is in the process of being restored to working condition and I am sure it will be a fantastic display and it will be a working display( it will be steam powered ). This generator clearly shows why " Brushes" are called brushes. The copper contacts are clearly cut into thin - flexible bands that easily form around the shaft to which they need to make contact ( Imagine a modern day corn broom made out of copper ) I can't wait to see it running.
Thx for doing this series. You brought back a memory when I built an electric magnet motor using instructions from the World Book Encyclopedia. If I remember correctly it was made using a shoebox, a 1" dowel, a bolt, some heavy strapping, copper wire, etc... Funny thing. Festerday I watched "luckygen1001" build a model generator.
I love everyone of your videos I have watched. Wish I can figure out how to watch from the first on you made yo the last one you have done. I do forget to like the ones I have. Well some of them. You have so much knoldge and experience I could learn from you. Thank you very much for all the time you have put in.
I just want to play with them too...but I am Lamenting I can't sit and read the Welsh catalog for days or anytime I want to spark an Idea. Look forward to the series, Mr. Pete. Thanks! ~PJ
When I was in High School I took the shop courses. I had no plans for collage. We were assigned to build a motor. Most chose a simple two pole. Even number rotors are usually not self starting. I thought if a three pole was better a five pole would be great. We used 1/2" by? flat iron for the rotors and the stator. My rotor was made from five "vs" they were held together by the wire windings. We did not use magnets we wound the stator also. The rotor shaft was welding rod. Ground points on the shaft ends and place it into deep center punched holes on the stator. Motor ran great and fast - for awhile. My holes for the shaft were not deep enough to keep the rotor in place. Rotor took off and landed in the shops box of vacuum tubes. Hard to balance a five pole rotor. I wound up going to collage One of my masters was in EE. Also got certified as a PE in Illinois and NC. George Dekan, my shop teacher, hired me after I graduated from college to Modernize a timer he sold to schools for athletic timing . I used TTL to replace relays and AC motor timer. The kid with the five pole motor stuck in his mind.
I a science project for Junior High, I built a simple motor using galvanized and copper wire. I got extra credit because the motor started automatically when I turned on the switch. :) I had noticed that if I pre-positioned the motor just right, it would do that, so that's what I did to show to the teacher.
We had a 4 speed gear box in our science room glass case. One day we got the teacher to let us look at it, but if we hadn't asked it would never have left that case. If I ever see one for sale I would not be able to pass it up!
I got to reading a page talking about turbo-generators ... they are rotors, directly connected to gas turbines, so they run at 24,000 rpm or more. They arrange the field magnets, and the stator windings, alternating in a ring. A pure iron rotor with multiple lobes spins (by turbine power) and alternately connects fields of force between the field and winding elements in the ring around the rotor. Hope that makes sense. I wish I could share images here!
Not boring at all i love see old machines and how simple there operation was.what looks to be a toy could be scaled up and if nothing else shows concept way cool
Hi, the reason why you need to start the motor manually is not because the magnet is too strong, but because the angle they "cover" is too small. If you compare with the Jensen generator, the magnets form about 60% of the periphery, so the rotor is exposed to field lines for a larger part of the circumference. The solution would be to put several neodym magnets on each side. This is also why the motor speeds up when you place a third magnet on top of the assembly.
If you keep the magnets parallel (like in the electromagnetic setup) the motor should spin in the directions you start it without changing the battery polarity
Actually if you were to rotate those brushes about 15¯ those little motors would self start. It just stops the brushes from contacting both the commutator pads in the motors resting position between the magnets. It can also make them go faster or slower depending on the position of the brushes too. Putting the magnet on top extends the field pole of the other magnets which is why it speeds up in that case. Fun stuff...
You remind me of me when I was a kid. I loved little steam engines and electric motors. My favorite toy was my erector set. Our school had a St. Louis motor but the teacher didn't know enough to ever get it out. That was a big disappointment to me. I still love this stuff but have limited time to pursue it. I have really enjoyed your videos on building steam engines. Just a side note, did you know that the Baraboo Steam show in Wisconsin has a class for kids where they build a wobbler steam engine?
Fun,I also made a motor in 9th grade electric shop,mid 60's.Wish I still had it.Watched the video on building Tesla Cars,they show how the motor is built.Very interesting if you can see it.Thank's.
Mr Pete, The motors will produce more torque if the magnetic field is "connected" around the magnetic circuit. Iron around the small magnets so the gap is only at the poles.
Peter W. Meek Yes when I got there the video had some 15,000 views. I watched it anyways though. magnets never did much for me. For me it was always lenses. I like my optics.
The coil spring can be easily adjusted to a smaller size, by simply looking for the join and unscrewing the two sides, then cut the outer non reduced section with sharp high tensile wire cutters ( will nick ordinary cutters, it is piano wire or spring steel wire) and grind flat again, then simply screw together again. Done that often to replace drive belts that otherwise require you to dismantle the entire machine just to get it off the shaft.
I can't wait for the next video. I wish you wouldn't worry about talking too much. If we didn't want to hear you talk we wouldn't be watching your videos. Thanks so much for all your effort.
dear Tubalcain, when i started with model steam engines, i used to visit your page for machining operations. for some time now, i only build combustion engine. why don't you try combustion engines, it would be fun building!
You could make drawings, and make them available, for home machinists to make their own St. Louis motors. These are beautiful demonstration devices for motors and electromagnetism.
Magnets and magnetism are at work in our everyday lives. You microwave oven has a power transformer (a magnetic device) to increase household voltage to a very high voltage for the electron tube that generates the microwaves. It is called a magnetron because it has a very powerful and large magnet on the tube to help it oscillate (more magnetism) correctly. Microwaves themselves are powerful magnetic waves at a very high frequency (several gigahertz). ... My grandmother had an old Sunbeam Mixmaster when I was a kid. Since solid state devices didn't exist then, the speed control rotated the brush holder. This changed the brush timing causing the motor to speed up as the brushes became closer to their ideal position. ... There are literally hundreds of things we use every day that use magnets and magnetism; from your electric razor to your cell phone. (Yes, I'm an electronics nut with a healthy respect for electricity. It can work for you and it can kill you!) Thank you, Mr. Pete, for your series. I hope I didn't steal too much of your thunder!
two rules to remember--- 1. more turns of wire means more voltage, 2. larger wire means more amps. Howard- licensed master Electrician same for transformers also
At age 65, I am often questioned about "purpose", that is an easy question. What appears to be a waste of time, is very educational, to me, and others. This pursuit of knowledge, or sharing of knowledge, is my entertainment, same as fishing, or hiking, or many of my other activities. Therefore, the purpose is to entertain!
This is a classic DC motor. If you weaken the magnetic field (of the stator) on a DC motor, it will go faster, but with less torque. For a generator you should use a strong stator and a rotor with a high number of windings. Otherwise you will get a low voltage output. If you want, you can build the rotor with permanent magnets and use y stator with a lot of windings, this will ease the construction but your generator will produce only AC.
You need a pole piece inside for the magnetic field, so the field area is larger. Will give both less cogging and more power, along with smoother running.
+stefantrethan - It would actually need a fairly complicated commutator (rotating switch, actually) which would reverse the polarity of the voltage applied to the coils twice in each revolution. It would need four "brushes" and an intricately segmented rotating part. On the plus side, it would be fairly easy to make it reversible.
+Peter W. Meek As a motor, yes, either that or a much more reasonable electronic commutation. As a generator, it would require no such thing. If you needed DC (say for a LED light) you could simply add a diode rectifier. Reversed motors like that (outrunner motors) are known for low speed high torque so might be a good match for a steam engine. A large diameter one would work even at flywheel speed (or you could even put the magnets on the flywheel itself).
Good point. I hadn't really considered that the whole point of this series is to make a generator rather than a motor. A moving magnet rotor and stationary coil would indeed make a good AC generator. A multi-pole rotor and a single coil might even make a MUCH simpler design.
They probably dont have these in schools now because the guards around the rotating components would obscure the moving parts, thus defeating its purpose as a teaching tool. Keep up the good work Lyle and don't be afraid to tell us "too much".
You make me think of my father.
He was midwest boy took to machining at the start of the war. Made a fine life for himself.
I may stop by from time to time just to hear you talk machines and machining.
Thank you for the videos.
I work in a motor repair shop. I wind armatures and machine bearing seats, and this is related to my career; but I still enjoy watching the expirimation and engineering. Thank you for putting this for anybody to watch, because this type of work is becoming a dying art.
Yeah, this is going to be a good series! I love this type of thing. When I was a kid, I was fascinated with electrical stuff. My grandfather had carwashes which he maintained and modified. I was a little kid (just walking and barely talking). He would talk to me about the relays, timers, contactors, motors and other parts - talking to me just like I was a grown adult.
I did understand some of it, and I still think about those times. Now, I work on large diesel generators and their control systems - and love every minute of it!
25 years ago for a science fair project my Dad and I built a little DC motor out of a thread spool and some small copper wire wrapped around bar stock bent in a C shape. That was a lot of fun to build with him. We could never get the motor brushes just right all of the time so it didn't always run very well. Cool builds Mr. Pete.
An awesome demonstration of the basics of every electric motor ever made. You show many small things that could be expanded (magnetic brakes!) and items that suggest experimentation for a great science project. Mr. Tesla would be proud.
AS SOON AS YOU TEACH ME, I'M GOING TO TEACH MY GRANDSON. LOVE EVERY MINUTE OF IT MR. PETE. THANKS FOR TAKING THE TIME.
Fantastic video. brings back a lot of memories of the motor kit i got for Christmas. In that day we only got one present and that year was a electric motor kit. It ran off your electric train transformer. ( that I got the year before) One had to build this kit and it would run my Ferris wheel. (from my erector set i got previously) It was a great build and it's too bad no one offers these kits today. I also got a two tube radio kit one year that i built and could listen to short wave from all over the world. I was raised in Tomah WI. and we had a telephone exchange. I would go through there trash and find round dry cells that came out of crank wall telephones, that were still used on farms, and used them to make magnets and all kinds of other things.
Good times,
Cheers,
Lee
Bless you for making simple science and practical skills available to inspire the younger generations!
I have been watching for quite a while now. All of your videos are worth their weight in gold. I have learned so much from watching them. My son and I even watched the magnet video.Very good information. I own a 1953 Logan and a 1968 Bridgeport .It is quite peaceful to go into the base meant and work on something. In fact today I did my first bolt circle. My son and I are going to build one of your wobbler steam engines . Please keep making the videos they are great .
You are never boring my friend, educational yes, boring no. Invisible magnetism has always been fascinating.
At nearly 70, I am glad you show this. I finally understand haw a generator works.
Thanks a lot.
Lots of nice toys. I never heard of a St Louis motor and I graduated just 2 years after you. I guess the science teachers around here liked other things better. I do remember gyroscopic demos and static electricity demos and vacuum demos and lots of other things but no St Louis motor.
Thanks for the video.
Thank you Sir, I had as a child and still have as an old man a facination with these things. I am a hobby machinist and am trying to make them. Really looking forward to your series.
I watched the magnets video you made. I too am a magnet nerd, i have a large neodymium magnet at work stuck to my filing cabinet, everyone who asks what it is I say to them "If you can pull it off, you can have it!" It is still there to this day :) Its an inch and a half cube with around 240lb pull off force.
Loved the St. Louis motor demo and history. Looking forward to dynamo series. Thanks for the great videos!
I remember building a motor in by secondary school science lab, taught by Mr Arthur New. Great Guy.That was a long tome ago!! Your video bought back some happy memories. Looking forward to this series MrP. Kind regards Garry from the UK (The English Bit)
This video brought back a great memory for me. We made dc motors in 4H. If I remember correctly they were very crude using enameled wire, some large nails, and a block of wood. The rotor was made from nails and the enameled wire and the brushes were just heavy gauge solid copper wire. Can't remember what was used for the fields but I'm sure it was a wound magnet. Have to see if my old 4H book is still at my parents house.
Mike W.
myfordboy did a series if videos making a generator for his steam engine, but I was sorely disappointed to find out he used a commercially manufactured motor for his generator. eagerly looking forward to this series of videos!
Please continue to include - side bars, opinions, insightful questions, and laments in the videos. They're as much fun as the stuff I'm learning... and perhaps more practical.
Fascinating for young and old as long as you haven't lost your sense of wonder :) Thankyou.
Great video Mr. Pete still teaching the kids something. Can't wait for the rest of the series!
Awesome video Tubalcain! Cant wait to watch the rest of the series!! And by the way, I have watched your videos on neodymium magnets several times and loved em!
mrpete you just talk as much as you want to. You talk, we listen and learn. Looking forward to this series. regards from the UK
I agree the more talking and rambling the better - Mr Pete you say it like it is - that's what I like
Great video, looking forward to the series of videos , didn't get bored at all. Very informative, all your videos are great. You are a great teacher.
Thanks for all you do. Jim
Well Mr Pete as ever highly entertaining and reminds me of my school days, how many of our kids don't get to see this? Personally there is something attractive about magnetism and its uses looking forward to part two!!!
Mr Pete, if you're building this as a dynamo instead of a motor to get the most power from it you'll want to use the most powerful magnets you can. Sorry if I'm preaching to the choir. I like yourself am just an old shop teacher (in electronics). Needless to say I love your videos!
Cool series. Looking forward to it. Thanks MrPete!
From Martin UK
I certainly watched your neo magnets video with great interest, & I also sent links to friends who also thought they were great. I'm 76, & still have a boys enthusiasm for experimenting, & watching all your interesting videos
+dumptongee Thanks
You should have an iron holder for the magnets as it extends the magnetic field farther around the armature. You saw this effect by holding another magnet at the top of the wood dynamo and it sped up. The commutator should be able to help adjust for the powerful neodymium magnets and reverse the polarity of the armature at the correct moment. These look super fun to play with. I love your videos Mr. Pete!
I remember getting a DC motor kit as a child. As I remember it you wound the rotor and then assembled the components onto the lid of the box via some "staples" that poked through holes were folded over!
Love it! Where have all the shop Teachers gone? Are they still out there but look different in the advance of technology ? Your fantastic keep doing what you do just the way you want! with nothing in front of you you cane be extraordinary ! As you are thank you.
The others are golfing. Thanks for watching!
I like your details and random/unique information. Tune out the naysayers and complainers and press on with your great work! THANK YOU Mr Pete.
Lyle,
Your commentary is greatly enjoyed. I wish I could have had you as my shop teacher.
+Michael Marriam You do!
Please talk as long as you want about anything that you want. Those who don't like it can always skip ahead. The rest of us find your talks and demonstrations fascinating.
I enjoy all the digressions and asides. My own mind seems to work similarly - a dozen ideas a minute. Sometimes I can barely speak coherently as ten new ideas come to me as I try to explain the previous idea,
seems like the kind of project that would a great thing to build with an older child who's interested and wants to be "involved" in what you're doing in the shop..... I can remember building something very similar to this when I was a webelo scout. (and later helping younger guys when I became a boy scout...)
the "locking up" problem you could probably fix by increasing the air gap between the armature and the magnets themselves....
fIner wire = more turns on the armature = stronger transient field to interact with.. Taking great care to keep the windings nearly coiled and not jumbled, also increases the field strength...
the small motor needs a higher speed as LEDs require a certain minimum voltage to activate, so it would require a certain speed to create that voltage....
fond memories. I built a motor very similar when I was in the fifth or sixth grade for a science fair. If I remember right I got the plans from a popular science magazine and the wire from Radio Shack. The armature was made from a bolt and nuts with a hole drilled through the center of the bolt. If I remember rightly I got an A on it. I remember the grade because it was one of a very few A's I got in school other than shop and votech classes. One of the things that really aggravate me about schools today is the elimination of any type of practical education and the emphasis on every child going to college. I am an electrician / Mechanic at a Quaker Oats plant and actually enjoy my profession, Which is kind of unusual today. I repair machinery made from the 50's to state of the art stuff put in in the last year. I gained my skills from helping on the farm as a kid. Vocational classes in school Working in my uncles machine shop in high school and the US Navy training schools and on the job training. Although I did attend a Tech school a few years back and earned a degree in Industrial Technology I found about 95% of it as useless or stuff I learned years before through other means. Today I do everything From 3 phase 480V electrical and PLC to basic machining and fabrication.
I have made a few steam engines but never built anything to run off them. This looks like its going to be my next project, it looks very good and will be interesting to do.
Look forward to the next video and thank you for sharing.
This is going to be a great series. Thanks Mr. Pete!
I truly enjoy these kind of items it takes me back to when I was a kid and I still love'm I guess Iam still a kid at heart LOL Great job Mrpete like always
Hello from Scotland, I noticed you apologized for your chat and the subject matter in the video, personally I found the whole video fascinating, educational and entertaining. Thank you for all your digressions, I'm off to watch part two.
Thanks
Really excited for this series. I recently attempted to make a 3 pole brushed dc motor but it didn't work for some reason. Looking forward to learning more about the subject.
You were able to buy LEDs that changed from red to green with reversal of polarity, or yellow if AC power source used - I'm sure they are still available. These would be great to demonstrate reverse running. Great videos - thanks again Rod Australia.
I'm going to love this series and will look forward to each new installment!
Hello Lyle - Here in Connecticut - I want you to know about the Connecticut Antique Machinery Association ( C.A.M.A.) . They normally do a spring "power - up " show in order to kick-off the summer season but their crown jewel show is their fall show which is about as good as it gets as far as antique machinery displays anywhere in NewEngland. They have a Generator on display that is in the process of being restored to working condition and I am sure it will be a fantastic display and it will be a working display( it will be steam powered ). This generator clearly shows why " Brushes" are called brushes. The copper contacts are clearly cut into thin - flexible bands that easily form around the shaft to which they need to make contact ( Imagine a modern day corn broom made out of copper ) I can't wait to see it running.
+Jayne Gus I hope someone makes a vid of that-thanks
Thx for doing this series.
You brought back a memory when I built an electric magnet motor using instructions from the World Book Encyclopedia. If I remember correctly it was made using a shoebox, a 1" dowel, a bolt, some heavy strapping, copper wire, etc...
Funny thing. Festerday I watched "luckygen1001" build a model generator.
+OldeGuido1 Yesterday... the F is nowhere near the Y goofy.
looking forward to this series... thankyou sir for sharing your knowledge with us....
I love everyone of your videos I have watched. Wish I can figure out how to watch from the first on you made yo the last one you have done. I do forget to like the ones I have. Well some of them. You have so much knoldge and experience I could learn from you. Thank you very much for all the time you have put in.
Really like your videos , there is no simple and in same time detail explanations like you do.
I just want to play with them too...but I am Lamenting I can't sit and read the Welsh catalog for days or anytime I want to spark an Idea. Look forward to the series, Mr. Pete. Thanks! ~PJ
Been waiting for this.. I share many of your lamentations Mr. Pete.
Looking forward to this series!
When I was in High School I took the shop courses. I had no plans for collage.
We were assigned to build a motor. Most chose a simple two pole. Even number rotors are usually not self starting. I thought if a three pole was better a five pole would be great.
We used 1/2" by? flat iron for the rotors and the stator. My rotor was made from five "vs" they were held together by the wire windings. We did not use magnets we wound the stator also. The rotor shaft was welding rod. Ground points on the shaft ends and place it into deep center punched holes on the stator. Motor ran great and fast - for awhile. My holes for the shaft were not deep enough to keep the rotor in place. Rotor took off and landed in the shops box of vacuum tubes. Hard to balance a five pole rotor.
I wound up going to collage One of my masters was in EE. Also got certified as a PE in Illinois and NC. George Dekan, my shop teacher, hired me after I graduated from college to Modernize a timer he sold to schools for athletic timing . I used TTL to replace relays and AC motor timer. The kid with the five pole motor stuck in his mind.
Thank you for a good story about the motor. You sound like quite a smart guy
Great series! I am looking forward to this one. - Bryan
I a science project for Junior High, I built a simple motor using galvanized and copper wire. I got extra credit because the motor started automatically when I turned on the switch. :) I had noticed that if I pre-positioned the motor just right, it would do that, so that's what I did to show to the teacher.
That was fun! i love motors and magnets!
Thanks for your videos, seen almost everyone of them!
We had a 4 speed gear box in our science room glass case. One day we got the teacher to let us look at it, but if we hadn't asked it would never have left that case. If I ever see one for sale I would not be able to pass it up!
+John Creasey Good thing you asked him
The frame material does matter! A proper dynamo will have an iron frame. Even strong magnets should have a proper magnetic circuit.
Just when you think it can't get any better Mr Pete raises the bar.....
Thanks for watching
I got to reading a page talking about turbo-generators ... they are rotors, directly connected to gas turbines, so they run at 24,000 rpm or more. They arrange the field magnets, and the stator windings, alternating in a ring. A pure iron rotor with multiple lobes spins (by turbine power) and alternately connects fields of force between the field and winding elements in the ring around the rotor. Hope that makes sense. I wish I could share images here!
Not boring at all i love see old machines and how simple there operation was.what looks to be a toy could be scaled up and if nothing else shows concept way cool
Very interesting. I remember making an electromagnet and motor in school. On a much cruder scale however.
I too remember building an electro magnet, it got very hot though.
Thanks for watching
Hi,
the reason why you need to start the motor manually is not because the magnet is too strong, but because the angle they "cover" is too small. If you compare with the Jensen generator, the magnets form about 60% of the periphery, so the rotor is exposed to field lines for a larger part of the circumference.
The solution would be to put several neodym magnets on each side. This is also why the motor speeds up when you place a third magnet on top of the assembly.
If you keep the magnets parallel (like in the electromagnetic setup) the motor should spin in the directions you start it without changing the battery polarity
Actually if you were to rotate those brushes about 15¯ those little motors would self start. It just stops the brushes from contacting both the commutator pads in the motors resting position between the magnets. It can also make them go faster or slower depending on the position of the brushes too. Putting the magnet on top extends the field pole of the other magnets which is why it speeds up in that case. Fun stuff...
Looking forward to another great series sir!
Fascinating Video, really enjoying this series. Thanks
love all your videos thanks for creating so many
Awesome! I can't wait to watch the whole series.
You remind me of me when I was a kid. I loved little steam engines and electric motors. My favorite toy was my erector set. Our school had a St. Louis motor but the teacher didn't know enough to ever get it out. That was a big disappointment to me. I still love this stuff but have limited time to pursue it. I have really enjoyed your videos on building steam engines. Just a side note, did you know that the Baraboo Steam show in Wisconsin has a class for kids where they build a wobbler steam engine?
Fun,I also made a motor in 9th grade electric shop,mid 60's.Wish I still had it.Watched the video on building Tesla Cars,they show how the motor is built.Very interesting if you can see it.Thank's.
Mr Pete, The motors will produce more torque if the magnetic field is "connected" around the magnetic circuit. Iron around the small magnets so the gap is only at the poles.
this is great stuff im loving it im a new sub . i cant wait to look at all your videos keep up the good work !!
Thanks for watching
looking forward to this build mr pete
As usual highly informative and entertaining!
Thanks
I'm going to be about the first person to watch your video on neodymium magnets.
+Paul Frederick - I actually watched it several times and shared it with a couple of friends.
Peter W. Meek
Yes when I got there the video had some 15,000 views. I watched it anyways though. magnets never did much for me. For me it was always lenses. I like my optics.
Love it ! now let us make one that is about 60" in diameter!
Thank you very much for your channel Mr. Pete!
👍👍👍
loved it,talk about magnetism all you want it will listen
The coil spring can be easily adjusted to a smaller size, by simply looking for the join and unscrewing the two sides, then cut the outer non reduced section with sharp high tensile wire cutters ( will nick ordinary cutters, it is piano wire or spring steel wire) and grind flat again, then simply screw together again. Done that often to replace drive belts that otherwise require you to dismantle the entire machine just to get it off the shaft.
Very interesting. Looks another project. Thanks vry much.
I can't wait for the next video. I wish you wouldn't worry about talking too much. If we didn't want to hear you talk we wouldn't be watching your videos. Thanks so much for all your effort.
dear Tubalcain, when i started with model steam engines, i used to visit your page for machining operations. for some time now, i only build combustion engine. why don't you try combustion engines, it would be fun building!
I'd like to some day
I have a simple one in one of my old metal shop books if you're interested.I'd be happy to dig it out and send copies your way.
Yes, send it--thank you. Get my mailing address from my BACK TO SCHOOL video. lyle
mrpete222 I havent forgot you but I cant seem to find the book.But I'll keep a eye out since I was looking for it for myself too.
very interesting video thanks for sharing
You could make drawings, and make them available, for home machinists to make their own St. Louis motors. These are beautiful demonstration devices for motors and electromagnetism.
I would but no one is interested in that
Magnets and magnetism are at work in our everyday lives. You microwave oven has a power transformer (a magnetic device) to increase household voltage to a very high voltage for the electron tube that generates the microwaves. It is called a magnetron because it has a very powerful and large magnet on the tube to help it oscillate (more magnetism) correctly. Microwaves themselves are powerful magnetic waves at a very high frequency (several gigahertz). ... My grandmother had an old Sunbeam Mixmaster when I was a kid. Since solid state devices didn't exist then, the speed control rotated the brush holder. This changed the brush timing causing the motor to speed up as the brushes became closer to their ideal position. ... There are literally hundreds of things we use every day that use magnets and magnetism; from your electric razor to your cell phone. (Yes, I'm an electronics nut with a healthy respect for electricity. It can work for you and it can kill you!) Thank you, Mr. Pete, for your series. I hope I didn't steal too much of your thunder!
two rules to remember--- 1. more turns of wire means more voltage, 2. larger wire means more amps. Howard- licensed master Electrician same for transformers also
My Harbor Freight Mini-Mill and I take offense to being called armchair machinists lmfao.
I think #144 is popular because of the blue nut used on the brass nut-buddy. I could be wrong, I was once before.
Great series.
At age 65, I am often questioned about "purpose", that is an easy question.
What appears to be a waste of time, is very educational, to me, and others. This pursuit of knowledge, or sharing of knowledge, is my entertainment, same as fishing, or hiking, or many of my other activities.
Therefore, the purpose is to entertain!
This is a classic DC motor. If you weaken the magnetic field (of the stator) on a DC motor, it will go faster, but with less torque.
For a generator you should use a strong stator and a rotor with a high number of windings. Otherwise you will get a low voltage output.
If you want, you can build the rotor with permanent magnets and use y stator with a lot of windings, this will ease the construction but your generator will produce only AC.
You need a pole piece inside for the magnetic field, so the field area is larger. Will give both less cogging and more power, along with smoother running.
SeanBZA The magnetic field isn't necessarily "larger", but is IS more concentrated by an iron core.
great video -- magnetism -- fantastic! thank you!!!
Will you make a reversed one with the coils static and the magnets moving?
That wouldn't even require a commutator or slip rings.
+stefantrethan - It would actually need a fairly complicated commutator (rotating switch, actually) which would reverse the polarity of the voltage applied to the coils twice in each revolution. It would need four "brushes" and an intricately segmented rotating part. On the plus side, it would be fairly easy to make it reversible.
+Peter W. Meek As a motor, yes, either that or a much more reasonable electronic commutation.
As a generator, it would require no such thing. If you needed DC (say for a LED light) you could simply add a diode rectifier.
Reversed motors like that (outrunner motors) are known for low speed high torque so might be a good match for a steam engine. A large diameter one would work even at flywheel speed (or you could even put the magnets on the flywheel itself).
Good point. I hadn't really considered that the whole point of this series is to make a generator rather than a motor. A moving magnet rotor and stationary coil would indeed make a good AC generator.
A multi-pole rotor and a single coil might even make a MUCH simpler design.
Thanks for another great video and explanation
I watched the Nd2Fe14B video, very interesting.
Tim
I was hoping you would add magnets as you were running it as a generator to see if it would affect the Led brightness.
I hope that all 7 of these videos are not this long winded!!!!!
THANX RICH