Linear Motors | How do they work?
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- Опубліковано 1 сер 2024
- A motor called a linear motor is making quite an impact in packaging industries and CNC machines. When someone says "motor," the image that comes to mind is usually something spinning, right? However, packaging and CNC machines require motors with linear movement. In this video, we are going to learn about the working of these beautiful motors by understanding a crucial concept about linearly travelling magnetic fields.
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This channel has the best technology explanations on UA-cam.
Good videos but sometimes the channel posts images about banning chinese apps and stuff.
@@juliano_marmarucaisn't he Indian? Lol.
There are others.
@@juliano_marmaruca so what? Chinese ccp causing trouble to its neighbours like India, taiwan and slowly making colonies in Pakistan and srilanka by giving huge loans which these small countries can't return.
good job!
As a cnc operator i can say with confidence we do not use linear motors in cnc machines. 😂 There is a stepper motor with high torque and a screw attached.
Yes, in a small and cheap CNC machine it's just as you say.
Have you ever seen a 30m long CNC Lathe?
You can't have a 30m long Ball Screw.
Technics CD players used a linear motor to drive the laser assembly which allowed extremely quick tracking. You could jump from track 1 to track 10 in about 1/10 of a second. Phillips used a similar motor that was curved instead of straight rotating around a pivot point.
This video only talked about how a linear motor moves, and not how it is controlled to be held in a still position when the motion is stopped. (hint: it's not allowed to just rest.)
Love it even though it seems a bit confusing but knowing how it works counts and it's simply made and has low noise and stuff.
In order to change the direction of the movement, you need to switch only 2 phases. The phase change at 4:54 only adds 120 degree phase. It does not change the direction. Apart from that, great video for beginners. Congrats!!
Exactly
Can this type of motor achive an static position? For the applications explained in the video I looks like they can but considering that the secondary works with eddy currents I'm not so sure
I came to the comments to say the exact same thing :D
These are great for pick and place applications where considerable torque is not required. I am a PLC technician, and I use these often. Easy to setup, and programming is a breeze using Ethernet IP. For higher torque applications, I use servos or steppers. The beauty of linear motors is the minimal amount of moving parts. Servos and steppers require actuators and drive systems (lead screws, belts, chains, etc.), therefore there is more maintenance, and potential failures. It's a balancing act of choice, depending on the application. Really love linear motors though!
Great video as always. Axial and lateral loads are very useful as well depending on surface tensions and other factors.
Radius motors are usually used for high power density applications because a spinning armature or stator preserves momentum.
Interesting. This is the first I’ve seen a linear motor. Any equipment I’ve had exposure to used axial stepper motors with a cogged belt drive and track. This seems like a much better design.
I'd say from first glance, the older cog belt drive and track is easier to replace parts, transport and maintain. It's also easier to adjust designs for than a rod that needs to be straight.
@@alberttyong Those are good points.
I've also heard they often require liquid cooling and can be quite bulky. Requiring the form factor to be considered early in development. None the less, i can see a lot of future applications
They aren't all that useful for DIY stuff. You need to know exactly what it will be used for, as you will never change it's dimensions or gearing later.
Depends how much money you want to spend on parts and repairs…
Very informative!
Most machines that require linear motion use a "linear actuator" to achieve this motion, which has a rotary motor and a screw or belt mechanism to translate rotary motion to linear motion. I think the majority of linear motion uses the "linear actuator" and not the linear motor due to a cheaper upfront cost and ease of control for most applications. Would be cool to get my hands on one of these linear motors to try out.
I came to say the same thing!
是的！
Also a question of power: an stepper-motor on a balls-screw allows for forces that would be impossible to achieve on a linear motor.
Linear motors are becoming less expensive and more common place. Easy to use like a stepper motor because it’s a stepper motor.
Excellent explanation sir
Thankyou❤️
Its was helpful for me..thank you
Nice idea it describes concretely the the phenomenon inside the linear motor . basic for this technology is the regulating movement central magnetic field generator .to be mentioned,many ways to set such linear movement not only using repultion and attraction electromagnetics theories .
concise and clear
Thanks for sharing! This video is amazing! 👏👏👏👏👏👏🙏🙏🙏🙏🙏🙏🙏
Awesome explained
Great video. Thanks.
Great content, ty.
Excellent presentation
Grat video with great explanations! But I think you should've also said that this is a linear induction motor (LIM) because it works with induction and that there's also another method of building a linear motor: the linear synchronous motor (LSM). This type of motor uses a different method, it has permanent magnets on the secondary (the moving part of the motor) and those magnets are attracted and repelled by the magnetic fields of the primary (the non-moving part of the motor). This LSM concept has some important advantages to the LIM: it's way more efficient (uses way less power and produces less heat), it can go to a specific position way more accurately, in case of an E-Stop the coils can be shorted and the LSM acts as a brake (LIMs can't do this), and lastly, it can achieve way bigger accelerations, speeds and forces than the LIM.
Can this LSM's secondary be a series of electromagnets (to permit high current and therefore high torque) and could the LSM also be a generator if an external reciprocating force were applied to the same equipment?
@@NoosaHeads I guess first would be technically possible, but is currently as far as I know not used (LSMs are mainly used for rollercoasters and there secondary can't really have any power electronics in it). However, your second idea is already in used on some rollercoasters as a brake which also gets the kinetic energy of the train back to electric energy and so it saves some electricity
@@HiAnonym Thanks for getting back to me.
@@NoosaHeads No problem
So I'll ask here can this be used without a "track" can this propel a vehicle down the street?
So Nicely Explained
👌👌👌👌👌👌👌
always such good videos!
Thank you so much.❤
Thank you for sharing..
This is pretty good presentation 💖👍.
Really great!
Best explanation
非常的视频，感谢感谢！
Most useful channel
Is very educational very good👍...
Great video.
I don't usually comment. Never bought any merch or Memberships, but definitely will become a Lesics member.
Quality content ..
Very Nice Bro! Get Good people!
Thanks for this vdo 🙏🙏🙏🙏🙏
Dear Sir,
Your videos are very informative and supporting too much to those who are studying in engineering college or doing job in industry. This is best way to use UA-cam platform. Thanks you very much for informative videos.
🙏🙏🙏
Cool, thanks.
Ah. This little guy beat me in the electrical engineer test! (Almost make my test fail cause there 4 questions about linear motors) And you explain to me!
That's too bad. Keep trying! I'm not even in engineering and found this so amazing to watch.
@@batman1169 I'm an electrician with 5 years in analog and 2 years in digital electronics now ;). That test was when I was 19 and started to learn expeerrrt electricity.
@@ammoniahuffers I don't have a formal education/training/work experience in anything Electric except some stuffs related to installation of power and telecommunications lines/cables as I work in constructions. But pandemic has allowed me to learn almost all of electrical/mechanical engineering discipline covering areas of power, control, manufacturing, production, conditioning, instrumentation, telecommunications, computing, transportations, etc :)
Excellent team lesics
Nice ❤❤
Excellent audience 👏👍👌
🥰🥰🥰
I want to know how modern hydraulic steering system works which is frequently used in construction equipments and heavy vehicles .
Thanks
Thanks👍
Best ever explanation with animation 😍
great. ❤️👌
Please make a video on PLC and SCADA in electrical engineering🙏🙏🙏
Thanks Lesic
Thanks for uploading this video i am a electrical engineer this video definitely give some knowledge to me
Can you make a video on how oxygen is produced in factories.
Nice video
Brother, make a video about the sound proof room. How many ways can a room be made?
How does this room work?
What technology should do it
This room?
Etc. with information.
Pls make a video on servo amplifier working.
Your videos are fully understandable for me.
Keep this working ☺️
Wonderfull
Please make machine operation series?🙏
Thankyou Lesics, you prove that teaching science is an art.
أليس من الممكن استخدام فكرة الروافع الهيدروليكية بين موتور صغير وتوربين كبير والاستفادة من فائض الطاقه الكهربائيه
0:12 sec in I really liked the rotating stator! ;) A question: - Is there a linear stepper motor? If not how would it work? Like an unrolled stepper motor? I really learn a lot from your lessons 👌
There are linear stepper motors and just as you mentioned... it is literally an unrolled stepper motor. These are usually used in places where high precision and fast motion is required as it can be microstepped like a stepper motor and... It does not have any backlash! even when changing directions!
You can also have linear position transducers (sensors) give feedback to your PLC
Linear Motor are also used on subway trains in China
Nice........I would also like to make educational videos like this..So please tell me which editing software should I use....
It is my understanding that aluminum will conduct electrical power but is not attracted by magnetics. Now if the block and rods were a specific carbon steel composition, I can see this working and be able to be tweaked based on mag field strength and the steel rod composition.
It is an induction motor. The force does not come from magnetic field directly acting on a ferrous body. Go watch a video on how an induction motor works.
Nice
Can you do a video on how an image dissector works for a television tube & LCD television?
Please make videos on the charging station.
This channel is haven for Engineers
Great video as honey:-)
Will you make us lathe machine operation/ machine operation series? Please
Can you please make a Vedio on how SSD works
@4:27 - Doesn't the rapidly changing eddy current field in the aluminum block cause it to heat up?
Any resistive non-superconductor will exhibit induction heating. However, the temperature increase will be negligible, assuming that a highly conductive metal is used, and time-averaged slip is low enough that induction heating from eddy currents is low.
so in order to change the direction of the moment, always we have to change the terminals......is this done manually or automatically
Excellent video! But is it possible a two or just one phase coils building? I’ll google it..
2 phase - Yes
Single Phase - Possibly but highly unlikely.
I doubt Ferrari's principle works linearly
Why the shaft is not getting extremaly hot? Is the shaft working also, as a electromagnet?
Is this linear motor suitable for making two legged robot? Robots are mostly built with servo motors today.
Keep up the good work guys
I love your Videos!!!
Please create video on how MRI's work :)
it's a good information, but this cnc machine needs, a 3D axes geographic map sensor to move exactly to any point of the projects like inkjet printers.
Yes it's all about transducers, sensors, actuators, processors, etc in automation after all. Electrical Engineering 101;)
Nice! However for CNC router, only the best had linear motor. The standard one uses step motor.
Super video, I just might need some help to understand the direction of the current flows on the winding configuration at 2:04 . Aren't the 3 "positives" sides of the generator on the left of the circuit? Because then for me:
Step 1: red = 0, blue=positive and yellow=negative
Step 2: red=blue=positive and yellow still negative
Step 3: red=positive, blue=0 and yellow still negative
Did I misinterpreted something or are the flows directions on the circuit not in concordance with the graph?
I am learning more from this channel than I did from 4 years expensive university.
What's the software which is used to make this video? Thank you.
Can the rod be held at an arbitrary position within the motion range?
Are linear motors efficient, or do they still waste 80 to 90% of the energy into heat?
Not just waste to heat but not all the coils produce work during the operation; so it is inefficient
Hmm. CNC motors must be pretty interesting with a lot of strength and acceleration/deceleration of heavy parts with 0,001mm precision despite long travel distances and the environment without controlled temperature, so I expected threaded rods with a stepper motor and some sensors reading accurate position. Actually, it's quite an interesting topic to cover.
And by the way piezoelectric linear motors are interesting too.
nice
Sir can you make a video on how camera works
I always assumed it was just a rotary motor gearing configuration.
How can I learn to use the software you use for this videos?
I am seeing and thinking why i found this explanation in late and also thinking about Japan railway technology..
Look up Prof. Eric Laithwaite, he invented the Linear induction motor (LIM) back in 1950's. He's also considered the father of Maglev. I'll leave a link to one of his lectures
"The Circle of Magnetism" (1968) - ua-cam.com/video/0tJfqMYHaQw/v-deo.html
So, is 3-phase power and switching the ONLY way to control directional changes with linear motors or is it just the most desirable because of 3-phase efficiency?
Best man best
cool danke
So this linear motor seems to work with a track can work without a track? Can it move a vehicle down the road?
This was good, but unfortunately how the windings are arranged in the final thing was wrapped up in about half a second!
Are there any diagrams etc that would show how to make one (assuming I have a 3-phase supply)?
Look up Prof. Eric Laithwaite, he invented the Linear induction motor (LIM) back in 1950's. He's also considered the father of Maglev. I'll leave a link to one of his lectures
"The Circle of Magnetism" (1968) - ua-cam.com/video/0tJfqMYHaQw/v-deo.html
But a CNC machine must also maintain a fixed position under load, how does it accomplish that if there is no torque at rest?
OKUMA cnc machine manufacturer has a machining centre with linear motors and I've been asking the same question to myself.Wish someone could explain.
Por favor pasen este video a Lecis Española, gracias!!!
I'm pretty sure CNC machines uses stepper motors, because they need precise positioning. At least vinyl cutters certainly do use them.
What differs a solenoid from a linear motor
Sir, which software you use to simulate industrial view? I would love to learn and thank you for your amazing efforts ☺️
It's probably solidworks
No, he uses Blender. His channel is run on quite a tight budget, so any expensive commercial software is out of the question.
Is it possible to make single Phase linear motor?
As I understand it , All asynchronous motors are three phase. A motor running of single phase just uses a capacitor to offset two of the phases in the windings. I suppose a moving magnetic wave in a linear motor could be created the same way.
Look up Prof. Eric Laithwaite, he invented the Linear induction motor (LIM) back in 1950's. He's also considered the father of Maglev. I'll leave a link to one of his lectures
"The Circle of Magnetism" (1968) - ua-cam.com/video/0tJfqMYHaQw/v-deo.html
Check out my linear motor video. Not nearly as flash but I talk through how to build you own at home.
Look up Prof. Eric Laithwaite, he invented the Linear induction motor (LIM) back in 1950's. He's also considered the father of Maglev. I'll leave a link to one of his lectures
"The Circle of Magnetism" (1968) - ua-cam.com/video/0tJfqMYHaQw/v-deo.html
I work in company that makes CNC machines with linear motors