1:08 Notice the 'field weakening' at higher speeds. At higher speeds the back emf becomes sufficiently high to impede flow of current into the rotor winding, thus reducing available power. So field current is reduced to keep current flowing into the rotor.
The motor becomes a generator when power is not applied.. To keep the current flowing is to power it up a small amount to cancel out the power it produces when the motor becomes a generator. You can also exploit this anomaly by sending the generated power to a resistor bank. Large resistor bank can absorb a lot of power requiring the generator motor to exert more force. Said force counteracts the inertial motion of the locomotive slowing it down. The dynamic braking principle is born.
@desiboi2559 i think you'd like a better understanding at this..cause this is very interesting... A motor generally requires electricity to work...but what most people don't realise is after the motor start spinning... it's basically like a generator (coil of conductor rotating in a field) this it also generates a back emf that opposes the applied voltage. This is good as it reduces the current draw(can be more explained in an equation just look it up). Thus we also don't have to worry about the motor frying too...at the starting there is no back emf thus high current is draw...this is why we use starters...they add additional resistance to the circuit and thus limiting the current. At high speeds the armature current becomes also too little ig..thus the current required to sustain the magnetic field is reduced (as in video) and is used for the motor
I never realized how much power went into these things. I mean, 1350 hp seemed reasonable for a motor that size, but I never converted that to wattage in my head as a comparison. At full chooch, that would be the equivalent power of around 1000 homes! And that's just one of six?!
*I have a 1,600 Watt brushless DC motor for my scooter. It's roughly 2.75 Horse power. Online it calculates the locomotives1350 Horsepower to Watts, are=100,6694.83 Watts.*
yep and it takes 2x 5000 hp electric motors to refine fiber length for paper. 16 inch diameter shaft, about 15 feet tall. A large mill that makes paper for magazines could have about 10-12 of these refiners each with 2x 5000hp motors, talk about power bill.
I am a certified train mechanic and I test drive these beasts, trains are brutal tbh. Faster acceleration than any passenger would experience and harder deceleration than anyone could imagine!
2 years later but... this is beautiful, any recommendations for resources to look into to gain some technical knowledge on them? Always had an interest in mechanics and engineering in general and trains are fascinating ^-^
@@jasonjamrs7413 I'm not an expert by any means at all, however I have worked with some fairly large engines (not trains) so will make an educated guess. I'm assuming it has something to do with either piston size or the generator, they are pretty heavy and leaving heavy moving parts sitting in one spot for an extended period of time can cause massive amounts of damage just from the weight of it. Hydroelectric powerplants like the ones you would find in a few major dams have to TAKE power from the grid at all times even if they arent generating any to replace it because if the massive multi-ton turbines stopped spinning for any amount of time they would have to be replaced entirely as the weight being in one spot for even just a few seconds is enough to crush the bearings that allow it to rotate. So, best guess is general maintenance? Trying to stave off wear and tare and corrosion?
It isnt that hard, turbos and nox you know. The problem is having 1000+ hp and not exploding or catch on fire due to overheating, the chiron is packed to the brim with radiators to avoid that for example, electric engines generate much less heat so it becomes much easier, cue the dozen or so 1000+ hp electric supercars popping up, really there is no limit to how powerful a electric car can be made, but i dont know anyone who crave a 10000 hp supercar.
Peter Fitzpatrick I thought it was a straight electric. Thought I saw a pantograph on top. Could be mistaken. Oh well a diesel is an electric with its own generator.
Skookum as frig. I originally figured this was some kind of test setup and wondering what that was in the background until I realized it was the ground and that it's on an actual locomotive, that's a pretty cool shot.
I've underestimated how hard these motors work until seeing as well as hearing them, I knew they were powerful but I didn't realise they were this powerful, it's cool to see the contactors and switchgear working too
I appriciate the difficulty in making video's like this. Thank you for this excellent example. 1.4kA at all the way up to 60km/h!! No wonder that thing was accelerating like a bunch of kids to the pizza at a birthday party.
All trains will typically draw stupid amounts of current at departure, it's the nature of electric motors to draw higher currents at low speeds. There's different types of technology around these days to make the engines draw smaller amounts of current while still providing an immense amount of power to get away as efficiently as possible. Mechanic field weakening is an older type of technique.
So, the faster motor spins, the lower amps running through it. When amps drop below 900A, you hit field weakening stage-by-stage, and it allows to boost amps back to 1000A. And prolongate the acceleration. Like a gearbox. I'd never understand it without such an informative video!
I can tell you it is quite something when you push the acellerator forwards in a train and you watch it pull 700 amps from 16 kV, thats a lot of power! In sweden we have GFCI on the supply line voltage, that sounds like it should protect idiots from bbq themselves, but it trips at like 45 amps...
Fascinating to watch, and it makes me want to see two similar videos: 1: This same setup, but instead of this train, put it on the traction motor of a modern GEVO over here in the US lashed to 5 or 6 of its bretheren and a 2 mile long stacktrain weighing a couple thousand tons 2: UP 844 on one of her highball runs across the Prairie.
The serial production version Rc1 of the Rb prototypes (the Electroputere 5100, this machine) accelerates to 100 km in less than 10 s so yes an electric locomotive runs away very fast if allowed to (tractive 275 kN). The 5100 has even more tractive power (412 kN or soo...) The 5100 were built for the mountains in the Balkans.
@@krakenwoodfloorservicemcma5975 I believe this a Electroputere 5100 CoCo engine so .... think AEM-7 in an 6 axle version and 25 kV 50 Hz version and with a design based on silicon rectifiers only. Look for the SJ Rb1 prototypes.
@@TheStefanskoglund1 hmm,kinda quiet for an EA,you would probably hear the ventilation hummming,and their traction motors sound a bit rougher then this
+Jack Duno. locos use extra thin strand wire so its not that bad. Working under the loco is awful and you are always banging your head on stuff. its filthy down there. I have changed motor brush holders in place and that will test your patience. we always managed to get it done though.
I can't figure out what I'm seeing here. What appears to me to be the train wheel (Bottom Left), is on an angle, and what looks like the motor (Top Center) seems inline with the direction of travel. So, I'm confused.
Between Kiruna (Sweden) and Narvik (Norway) as the train is loaded with iron malm it decent into Narvik harbor the train's energy goes back into the grid.
All modern locomotives and trains have done this for the last 30 years or so now. But I read somewhere that the full iron ore train going downhill to Narvik generates all the energy that the empty train going uphill needs. So in total they use almost no electricity at all and the trip is "free".
The DC motor here is a series wound machine, that is the field and armature windings are in series with each other. A permanent magnet (PM) motor uses magnets to generate the magnetic field instead of field winding coils. Anyway, once you get a series motor up far enough in speed the you basically run out of voltage to get the motor to further accelerate any further due to the back EMF of the motor. Field weakening reduces the current in the field winding which allows the already available motor voltage more 'room' to accelerate the motor further. Shunt and compound wound DC motors don't have these issues so much, but they also do not have the zero speed torque capabilities that the series wound motor has. You can still find series wound motors in use today in your cars electric starter. Pound for pound you're hard pressed to find another motor type for the cost and simplicity of control to provide this kind of torque abilities. I'm actually surprised there wasn't more flash from the contactors on this run. Very nice video!
When the train is running on a horizontal way,there is not need of high pulling force.So why magnetic field of the engines get decreased and the speed - increased.
Would that motor fit into my washing machine? I hooked my washer up to 480 volt single phase and it caught fire My neighbor gave me a metal box said it wAs a trans former and to back feed it whatever that meant and then connect it to the washer I turned on my main power the lights dimmed abit my flat screen tv blew all kinds of smoke I turned the washer on and boooooooom all the lights went out and the washer cirkutry was bright orange Wow what a mess my neighbor herd the come motion said if I get a biggy motor this wood half not happening So I be lookin for a big ger motor
Why use 480volts AC on a washing machine, 220VAC 2 pole would do the job just nicely. Hell they sell some that run on 120 on a 20amp circuit. I'm sorry but I'm not understanding, is this for your home or a business, do u live in the us or another country? The transformer that he gave u would need to be a step down transformer to convert your 480v to 220 and then send it to your washing machine. It blew cuz of all that power going into it lol this better be a joke
Thanx for the vid, I'm hopping around trying to find a GE DC-600 drive/ traction motor setup. I used to set up these drives. Cool history. These days Flux vector AC variable freq drives are the rule.
In a nutshell, it's an electrical alteration to achieve different operating properties from a Direct Current electric motor. Someone else asked the same question 2 weeks before you did in another comment, and there is a fantastic response comment to that question, explaining in good detail how it works. Browse thru the comments to find the question asked by a commenter named Jim Colleran, and below it you will find the response from kleetus92 explaining what it is and why it is used.
Not only for DC-motors, you can apply field weakening to any electric motor (although it's not always necessary to use it). Simply said, weakening the magnetic field in the motor allows you to trade torque for speed. In this old heap they use it in three fixed steps (modern drives can do it continuously/without any steps). As the speed increases here, they weaken the field sequentially in 3 steps (much like changing gears in a car).
The used motor is a series motor which means that the field and armature are in series. Once the locomotive reaches a certain speed the field is shunted (parallel resistor). This will "sacrifice" torque for speed.
Not necessarily. You have to figure in if it’s wired in series or parallel or series parallel. Some systems have anti-slip control so whenever a wheel breaks traction the motor stops or backs off.
John Tapp :Hello. Has it actually been a year since I posted this? Wired in series OR parallel I understand. Series Parallel would be series, but with two , or extra heavy, wires which can handle the load of hill climbs or heavy acceleration. Is braking done with electromagnetics? If so, possibly creating the heaviest demand? Was this tech stolen and abused to make the prius? What a waste that would be!
Contraband Fan by Mark Burns First of all, I’m no expert. Second, there are electromagnetic braking systems on some but not all of these locomotives, in conjunction with standard air brakes. One such system is called regenerative braking, where the traction motor wiring is switched so that the motors act as generators, and the power generated goes out through the line and is used by other trains. Dynamic braking, although much like regenerative, only goes through resistance grids-diesel locomotives so equipped use this method. I doubt very much Prius borrows much if any technology from trains. The demands on both are very different and wouldn’t be practical above or below a certain size.
John Tapp, regenerative is the term I was looking for. Very edficient! This must be why idiots, mostly libtards are removing railways. Two lines have been taken out here in Indianapolis, The Nickel Plate and the Monon, one of which is now a greeeeeeeeenway, the other having no rails left, and no trespassing signs at all road crossings. It is tempting to drive the rout and test my 4X4 just for a laugh. I was being sarcastic about the prius, and I would not have one, unless I could equip it with a big block V8 and 4 on the floor, The snotty imported, smug driver having, eco wannabe, unicorn clown cars. HAA!
Contraband Fan by Mark Burns pound for pound, freight by rail is more efficient, uses less fuel, costs less in overhead, and when stack trains along with intercity trucks, can be very viable transportation, along with freighters for import/export. The idiots out there just don’t know you can’t throw away a transportation mode just because it sounds like it may burn more fuel. Actually, trains burn less fuel, and are ideal for huge land masses.
Almost half the amperage required at max RPM due to decreased field current (field weakening) to compensate for increased inductive reactance/impedance in the armature (AKA Back EMF) exhibited by all series DC motors as a result of faster current reversals in the armature @ higher RPM. Lenz's law.
When i watch video like this i always feel myself like i'm doing something shameful. It's like mom will burst into the room and yells: WHAT A HELL ARE YOU DOING HERE?!
@@PrekiFromPoland The locomotive has a transformer with taps which reduces the AC voltage, a full bridge rectifier that turns AC into DC, and then it uses DC to power the 6 (or 4) DC motors on every axle.
Id like to see the cloud of smoke those big diesel generators put out when these electric motors are switched on lol!! They smoke enough just running these motors, but startup current on an electric motor is 3 times the running current so the massive sudden increase in load on the engine is bound to make a little smoke lol
L'amperemetre montre l'intensite du courant secondaire (1500V) et pas le courant primaire (25kV). 6.000A sous 25kV donne 150MW ce qui est environ la puissance d'une petite turbine d'une centrale electrique ;) Si je me souviens bien le TGV a une puissance continue de environ 6MW ce qui donne 4000A sous 1.5kV
at 0.24 for a few seconds in the top right it looks like the contractors are giving off some sort of radiation release captured by interference on the camera? or fine white dust . But it looks very similar to how radiation kills off pixels in a sensor.
A guy put a loco traction motor in a little Toyota MR 2 two seater sports car. Motor in the rear, bunch of lead acid batteries up front in the frunk. He said it would go 70 mph forwards or reverse in the blink of an eye.
in latvia electric trans start from a stop with a pretty sudden jolt. defo enough to knock someone over if they are standing and not holding onto something. why would this be the case with an electric motor?
I want to learn more about field weakening in motors but I can’t find an information online about it. Only info I’ve ever found is simply “weakens the field to increase current”
So I understand the contactor and star delta configuration thing, but what do the fielf weakening contactors do? I can see the current going up as they click, so are they some kind of soft start system?
Is the loud hum thing that you can hear from like a mile away, the wheels or the engine? Like it sounds like an electric noise hum like high low. The dododododododo noise.
1:08 Notice the 'field weakening' at higher speeds. At higher speeds the back emf becomes sufficiently high to impede flow of current into the rotor winding, thus reducing available power. So field current is reduced to keep current flowing into the rotor.
Explain in more detail please, especially what current and field current is
@@AbdulRaheem-ul6kp i think its like an upgraded resistor but i dont think it is
The motor becomes a generator when power is not applied..
To keep the current flowing is to power it up a small amount to cancel out the power it produces when the motor becomes a generator.
You can also exploit this anomaly by sending the generated power to a resistor bank. Large resistor bank can absorb a lot of power requiring the generator motor to exert more force. Said force counteracts the inertial motion of the locomotive slowing it down. The dynamic braking principle is born.
"counter EMF"
@desiboi2559 i think you'd like a better understanding at this..cause this is very interesting...
A motor generally requires electricity to work...but what most people don't realise is after the motor start spinning... it's basically like a generator (coil of conductor rotating in a field) this it also generates a back emf that opposes the applied voltage. This is good as it reduces the current draw(can be more explained in an equation just look it up). Thus we also don't have to worry about the motor frying too...at the starting there is no back emf thus high current is draw...this is why we use starters...they add additional resistance to the circuit and thus limiting the current. At high speeds the armature current becomes also too little ig..thus the current required to sustain the magnetic field is reduced (as in video) and is used for the motor
that motor has to have some serious bearings
yes
Some serious wiring as well.
Serious balls you say? Correctomongo 😉😆
**sigh**
Probably just a set of tapered roller bearings on each end.
I never realized how much power went into these things. I mean, 1350 hp seemed reasonable for a motor that size, but I never converted that to wattage in my head as a comparison. At full chooch, that would be the equivalent power of around 1000 homes! And that's just one of six?!
Yup, lets put one in my car 👍
@@sakariaskarlsson634 Tesla roadster nuclear reactor waster edition
a v e w a t c h e r
*I have a 1,600 Watt brushless DC motor for my scooter. It's roughly 2.75 Horse power. Online it calculates the locomotives1350 Horsepower to Watts, are=100,6694.83 Watts.*
yep and it takes 2x 5000 hp electric motors to refine fiber length for paper. 16 inch diameter shaft, about 15 feet tall. A large mill that makes paper for magazines could have about 10-12 of these refiners each with 2x 5000hp motors, talk about power bill.
that's a smooth track.
This underskirt video is for adults only ....
@@pooorman-diy1104 xD
@@Salpeteroxid lol ...
I looks smooth cause the suspension are taking all the bumps . You can notice how the bogie moves
@@pooorman-diy1104 lmao
I am a certified train mechanic and I test drive these beasts, trains are brutal tbh. Faster acceleration than any passenger would experience and harder deceleration than anyone could imagine!
Oh you're the one who risks their lives
2 years later but... this is beautiful, any recommendations for resources to look into to gain some technical knowledge on them? Always had an interest in mechanics and engineering in general and trains are fascinating ^-^
@@abhinavmadhu9668 wtf
How come they leave the train idling for hours sometimes I know about
@@jasonjamrs7413 I'm not an expert by any means at all, however I have worked with some fairly large engines (not trains) so will make an educated guess.
I'm assuming it has something to do with either piston size or the generator, they are pretty heavy and leaving heavy moving parts sitting in one spot for an extended period of time can cause massive amounts of damage just from the weight of it.
Hydroelectric powerplants like the ones you would find in a few major dams have to TAKE power from the grid at all times even if they arent generating any to replace it because if the massive multi-ton turbines stopped spinning for any amount of time they would have to be replaced entirely as the weight being in one spot for even just a few seconds is enough to crush the bearings that allow it to rotate.
So, best guess is general maintenance? Trying to stave off wear and tare and corrosion?
Fun fact: locomotive is standing in place, it's the earth that's spinning below it.
According to Chuck Norris?
HAHA THIS IS SO FUNNY
Like the planet express ship?
Interstellar theme playing
According to einstein your opinion us correct
I still don't know how you could fit 1350 horses on one car
The average professional drag car makes 1500 hp it's not that hard
@@chabka34
that's nice, but he wants to know how you put that many horses inside a train and make them fit
@ with a blender
The Devel Sixteen could give you 5,000 reasons why..
It isnt that hard, turbos and nox you know. The problem is having 1000+ hp and not exploding or catch on fire due to overheating, the chiron is packed to the brim with radiators to avoid that for example, electric engines generate much less heat so it becomes much easier, cue the dozen or so 1000+ hp electric supercars popping up, really there is no limit to how powerful a electric car can be made, but i dont know anyone who crave a 10000 hp supercar.
Summuary: Electricity is everthing for us!
Fatih Burhan we’re basically dead ducks without it.
Professional Shitposter it was centuries in the making.
@Professional Shitposter You live up to your name..
Its a diesel-electric.... 🙄😂😂
Peter Fitzpatrick I thought it was a straight electric. Thought I saw a pantograph on top. Could be mistaken. Oh well a diesel is an electric with its own generator.
Skookum as frig. I originally figured this was some kind of test setup and wondering what that was in the background until I realized it was the ground and that it's on an actual locomotive, that's a pretty cool shot.
I see you like ave
It literally chooches.
domtron88 what's the chooch factor
yeah check out the channel, seems to be the premier lok extreme-close-up action footage channel on yt
Me too.
This just made me truly appreciate how much trust is put on people who design the whole railroad system ...
This didn't age well... especially in Ohio 😳
@@peterjensen6844 it’s the execs, not the engineers
@@peterjensen6844 straight fax
I've underestimated how hard these motors work until seeing as well as hearing them, I knew they were powerful but I didn't realise they were this powerful, it's cool to see the contactors and switchgear working too
That is an awesome video. Great camera set up. Love the sound.
RODALCO2007 Donald Trump is your President.
I also good camera work
Rodalco is in New Zealand, they don't have any presidents @@mrjoeyb
@@mrjoeyb lay off the Waccy-baccy mate.
Woah fancy finding you here, small world this youtube is xD
Just love the sound of those big electric motors starting up.
There's a train in France (Z20500) that somehow has these sounds amplified to the point that it legitimately became it's signature
I appriciate the difficulty in making video's like this. Thank you for this excellent example. 1.4kA at all the way up to 60km/h!! No wonder that thing was accelerating like a bunch of kids to the pizza at a birthday party.
All trains will typically draw stupid amounts of current at departure, it's the nature of electric motors to draw higher currents at low speeds. There's different types of technology around these days to make the engines draw smaller amounts of current while still providing an immense amount of power to get away as efficiently as possible.
Mechanic field weakening is an older type of technique.
@@Dutch3DMaster Yeah, under normal conditions the current would drop much sooner than it did here. Unless they are pulling quite a load.
Ohms Law tells me the voltage is 600 Volts DC for those who wondered.
So, the faster motor spins, the lower amps running through it. When amps drop below 900A, you hit field weakening stage-by-stage, and it allows to boost amps back to 1000A. And prolongate the acceleration. Like a gearbox. I'd never understand it without such an informative video!
I can tell you it is quite something when you push the acellerator forwards in a train and you watch it pull 700 amps from 16 kV, thats a lot of power! In sweden we have GFCI on the supply line voltage, that sounds like it should protect idiots from bbq themselves, but it trips at like 45 amps...
Yeah, you're gonna be as fried as a chicken drumstick at 45A/16kV... Ugh.
What a great shot of the traction motor and electric installation;)
great film!
zzr600cc nice you're my friend plzzz
White wheel and big wheel from copper is for transmitting electric energy to the rotor?
Even after watching the video I cannot think of anything more or less I want to see - PERFECT video!
ive seen videos of mechanical field weakening and heard of it being done electrically, but never actually seen how it was done. i learned quite a bit!
Fascinating to watch, and it makes me want to see two similar videos:
1: This same setup, but instead of this train, put it on the traction motor of a modern GEVO over here in the US lashed to 5 or 6 of its bretheren and a 2 mile long stacktrain weighing a couple thousand tons
2: UP 844 on one of her highball runs across the Prairie.
How bout a loaded coal train...15,000 tons
Are they sloppy bushings or is that normal for things to move around so much?
True raul therapy....I like it!!!!.....All the best from Romania
UA-cam recommendations algorithm:
2018? Nah
2019? Not really
2020? Yes, put this into his recommendations!
Must appreciate the camera man for bringing us such footage.
For anyone wandering it did 0-100 (0-62) in just about a minute 0:15-1:15
thats astonishing for such a heavy machine
Sooo slow on 6X900Kw:)
Maybe driver dont get full pedal on start?
The serial production version Rc1 of the Rb prototypes (the Electroputere 5100, this machine) accelerates to 100 km in less than 10 s so yes an electric locomotive runs away very fast if allowed to (tractive 275 kN). The 5100 has even more tractive power (412 kN or soo...)
The 5100 were built for the mountains in the Balkans.
@@joe125ful they cant go full from start. the loc would rip the hook of the next wagon.
@@tomast9034 Hmmm....
iv'e always wondered what locomotive traction motors looked like in operation
TΩwmaX trin
So many applications out there. I repaired EMD diesel electrical systems for 12 years and have never seen traction motors like this.
@@krakenwoodfloorservicemcma5975 I believe this a Electroputere 5100 CoCo engine so .... think AEM-7 in an 6 axle version and 25 kV 50 Hz version and with a design based on silicon rectifiers only.
Look for the SJ Rb1 prototypes.
@@TheStefanskoglund1 hmm,kinda quiet for an EA,you would probably hear the ventilation hummming,and their traction motors sound a bit rougher then this
@@TheStefanskoglund1 and an EA has 5100 KW of power,a lot more then this 1 MW :)
The perspective of each movie is f***ing awesome! :]
I thought You said fishing awesome
Great video, that motor is a torque monster, very impressive.
0:23 My Computer fans when I turn RTX mode on:
That's some serious acceleration even while hauling light weight. Great video! Have liked and subscribed. Cheers from India.
Rly?:)
Good on you for getting the cameras in place to catch that.
This exactly explains the speed-time curve for the main-line service locomotive.
Legends say, it is still accelerating to this day
I'd like to know what size conductor is feeding that motor, as well as how it's terminated
The DC traction motors for EMD that i worked on were around 500 kcm. they usually have glad hand type crimps. They fit tight...
+ackmino That must be an absolute bear to work with, damn man
+Jack Duno. locos use extra thin strand wire so its not that bad. Working under the loco is awful and you are always banging your head on stuff. its filthy down there. I have changed motor brush holders in place and that will test your patience. we always managed to get it done though.
I can't figure out what I'm seeing here. What appears to me to be the train wheel (Bottom Left), is on an angle, and what looks like the motor (Top Center) seems inline with the direction of travel. So, I'm confused.
I need a 10hours version of this
Between Kiruna (Sweden) and Narvik (Norway) as the train is loaded with iron malm it decent into Narvik harbor the train's energy goes back into the grid.
All modern locomotives and trains have done this for the last 30 years or so now. But I read somewhere that the full iron ore train going downhill to Narvik generates all the energy that the empty train going uphill needs. So in total they use almost no electricity at all and the trip is "free".
What voltage on this engines? 1250A with 3kV gives 3.75MW.
From the numbers he gave us in the description 1,050,000/1450 gives about 725 volts.
What locomotive type is this? The air pressure valves looks very much like swedish ASEA YBL8-valves and the main contactors looks like ASEA EJD 1100.
ASEA patented, Romanian built LE5100, modernized by Concar.
I thought it looked familiar in some way :)
I thought it was an ASEA locomotive because I saw that amp meter that is the same in our Croatian series 1141 ASEA locomotives. :D
I think it should be Koncar... :)
Its front remind me someway the style of the glorious italian E444 tartaruga (before the revamping). Beautiful machine anyway!
What is the gear reduction for these? Or is there?
Nice video. What is field weakening?
It's the last metod to increase the speed and torque of a DC motor when the voltage regulation has reached its maximum voltage.
Thanks
The DC motor here is a series wound machine, that is the field and armature windings are in series with each other. A permanent magnet (PM) motor uses magnets to generate the magnetic field instead of field winding coils. Anyway, once you get a series motor up far enough in speed the you basically run out of voltage to get the motor to further accelerate any further due to the back EMF of the motor. Field weakening reduces the current in the field winding which allows the already available motor voltage more 'room' to accelerate the motor further. Shunt and compound wound DC motors don't have these issues so much, but they also do not have the zero speed torque capabilities that the series wound motor has.
You can still find series wound motors in use today in your cars electric starter. Pound for pound you're hard pressed to find another motor type for the cost and simplicity of control to provide this kind of torque abilities.
I'm actually surprised there wasn't more flash from the contactors on this run. Very nice video!
Thanks also
When the train is running on a horizontal way,there is not need of high pulling force.So why magnetic field of the engines get decreased and the speed - increased.
Train locomotives are unbelievably powerful. The torque forces we're witnessing here are difficult to comprehend
Why does the electric motor starting to whine sounds like an V12?
@雷電 It says it's DC
VTEC kicking in
Use google.
@@douro20 thanks
Salam hai unn makers ko jinhone 80 - 130 ton tak ke weight ko khichne wali in beast motors ko banaya hai 💪🙏🇮🇳
when it starts up it sounds like an anti-mass spectrometer
Wow! ... That was cool! ... Thanks for the "field weakening" notes
Would that motor fit into my washing machine?
I hooked my washer up to 480 volt single phase and it caught fire
My neighbor gave me a metal box said it wAs a trans former and to back feed it whatever that meant and then connect it to the washer
I turned on my main power the lights dimmed abit my flat screen tv blew all kinds of smoke
I turned the washer on and boooooooom
all the lights went out and the washer cirkutry was bright orange
Wow what a mess my neighbor herd the come motion said if I get a biggy motor this wood half not happening
So I be lookin for a big ger motor
Why use 480volts AC on a washing machine, 220VAC 2 pole would do the job just nicely. Hell they sell some that run on 120 on a 20amp circuit. I'm sorry but I'm not understanding, is this for your home or a business, do u live in the us or another country? The transformer that he gave u would need to be a step down transformer to convert your 480v to 220 and then send it to your washing machine. It blew cuz of all that power going into it lol this better be a joke
Does it fit my honda?
Great video! Big LIKE ;)
Классная сборка всех данных с разных камер в одном видео. Инженерное спасибо)
Electric cars have 70 years of diesel locomotive tech behind them. The batteries are the only new thing about them.
That and the 3 phase ac motors controller by advanced electronics.
Motor controllers that convert DC to 3 phase AC have been in use in trains since the 1980s in The Netherlands, possibly earlier in other places.
Thanx for the vid, I'm hopping around trying to find a GE DC-600 drive/ traction motor setup. I used to set up these drives. Cool history. These days Flux vector AC variable freq drives are the rule.
What is the purpose of the field weakening?
In a nutshell, it's an electrical alteration to achieve different operating properties from a Direct Current electric motor. Someone else asked the same question 2 weeks before you did in another comment, and there is a fantastic response comment to that question, explaining in good detail how it works. Browse thru the comments to find the question asked by a commenter named Jim Colleran, and below it you will find the response from kleetus92 explaining what it is and why it is used.
Not only for DC-motors, you can apply field weakening to any electric motor (although it's not always necessary to use it). Simply said, weakening the magnetic field in the motor allows you to trade torque for speed. In this old heap they use it in three fixed steps (modern drives can do it continuously/without any steps). As the speed increases here, they weaken the field sequentially in 3 steps (much like changing gears in a car).
The used motor is a series motor which means that the field and armature are in series.
Once the locomotive reaches a certain speed the field is shunted (parallel resistor). This will "sacrifice" torque for speed.
Skip all the bible stories above. The only thing you wanted to know that it’s the electric equivalent of a gearbox.
The engineering on some of these is amazing. We love our train videos in Clemson SC, Go Tigers! Keep it up
I don't know why.. But I always gravitate towards trains!..
Khi tàu đi qua, sẽ có một khoảng trống xung quanh tàu, sau đó không khí xung quanh sẽ đẩy bạn dọc theo tàu
Because they are so massive! ;-)
Just another 1209 of the these babies Doc, and you got your 1.21 GIGAWATTS!!!
Thank you for sharing these insights! I'm learning from it. I love that.
Good description of the load in the summary of the video...
This is an awesome Video. These traction motors can take a beating. Great camera work. What is the base voltage? 700V?
Not too sure why I watched this.... but I don’t regret it!!!
Very informative and well done. I learned a lot. Thank you!.
Nothing I love more than sleeping on moving trains...like a lullaby.
There's one of those on every wheel of the engine, otherwise the one would break traction and spin, right?
Impressive video
Not necessarily. You have to figure in if it’s wired in series or parallel or series parallel. Some systems have anti-slip control so whenever a wheel breaks traction the motor stops or backs off.
John Tapp :Hello. Has it actually been a year since I posted this? Wired in series OR parallel I understand. Series Parallel would be series, but with two , or extra heavy, wires which can handle the load of hill climbs or heavy acceleration. Is braking done with electromagnetics? If so, possibly creating the heaviest demand?
Was this tech stolen and abused to make the prius? What a waste that would be!
Contraband Fan by Mark Burns First of all, I’m no expert. Second, there are electromagnetic braking systems on some but not all of these locomotives, in conjunction with standard air brakes. One such system is called regenerative braking, where the traction motor wiring is switched so that the motors act as generators, and the power generated goes out through the line and is used by other trains. Dynamic braking, although much like regenerative, only goes through resistance grids-diesel locomotives so equipped use this method.
I doubt very much Prius borrows much if any technology from trains. The demands on both are very different and wouldn’t be practical above or below a certain size.
John Tapp, regenerative is the term I was looking for. Very edficient! This must be why idiots, mostly libtards are removing railways. Two lines have been taken out here in Indianapolis, The Nickel Plate and the Monon, one of which is now a greeeeeeeeenway, the other having no rails left, and no trespassing signs at all road crossings. It is tempting to drive the rout and test my 4X4 just for a laugh. I was being sarcastic about the prius, and I would not have one, unless I could equip it with a big block V8 and 4 on the floor, The snotty imported, smug driver having, eco wannabe, unicorn clown cars. HAA!
Contraband Fan by Mark Burns pound for pound, freight by rail is more efficient, uses less fuel, costs less in overhead, and when stack trains along with intercity trucks, can be very viable transportation, along with freighters for import/export. The idiots out there just don’t know you can’t throw away a transportation mode just because it sounds like it may burn more fuel. Actually, trains burn less fuel, and are ideal for huge land masses.
Not sure exactly what I’m looking at but it’s definitely bad ass!
I’ve never seen a locomotive operate with the wheel in diagonal position before. 🤔
Bassotronics wdym diagonal
the wheel is not diagonal
@ *gυяυвυlυ •*
Don’t you see that everything is straight except for the wheel?
@ *Calvin Junge*
Well I can see that the whole mechanism is straight except for the wheel. 🤷🏻♂️
Bassotronics hm yeah I guess you're right it does sit at an angle... Not sure if I would call that diagonal but it's definitely angled
Almost half the amperage required at max RPM due to decreased field current (field weakening) to compensate for increased inductive reactance/impedance in the armature (AKA Back EMF) exhibited by all series DC motors as a result of faster current reversals in the armature @ higher RPM. Lenz's law.
When i watch video like this i always feel myself like i'm doing something shameful. It's like mom will burst into the room and yells: WHAT A HELL ARE YOU DOING HERE?!
People who love gasoline engines for the sound have never heard one of these engines, they are very cool
Very good.What loccomotive is that?BDZ class 46,yes?
ventsi002 Yes it is
But isn't it AC locomotive? There's no DC catenary in Bulgaria as far as I know.
@@PrekiFromPoland The locomotive has a transformer with taps which reduces the AC voltage, a full bridge rectifier that turns AC into DC, and then it uses DC to power the 6 (or 4) DC motors on every axle.
@@velikiradojica Interesting, in Poland there's lots of vehicles that do the opposite - convert 3kV DC into AC voltage via an inverter.
an electric motors are most efficiently machines. they are max torque(0-rpm till max--rpm).
"Ahead warp-factor five, Mr Sulu."
More like Transwarp than Warp factor 5.
Fly her apart then!
Id like to see the cloud of smoke those big diesel generators put out when these electric motors are switched on lol!! They smoke enough just running these motors, but startup current on an electric motor is 3 times the running current so the massive sudden increase in load on the engine is bound to make a little smoke lol
This is not diesel-electric. It gets its power from overhead power line through pantograph.
That sound omg iloveit
What type of locomotive or multiple unit is this?
Souvenir d'un voyage en cabine de TGV. Très impressionné de voir l'ampèremètre grimper à 6.000 A sous 25 kV au décollage de la rame !
L'amperemetre montre l'intensite du courant secondaire (1500V) et pas le courant primaire (25kV).
6.000A sous 25kV donne 150MW ce qui est environ la puissance d'une petite turbine d'une centrale electrique ;)
Si je me souviens bien le TGV a une puissance continue de environ 6MW ce qui donne 4000A sous 1.5kV
Сколько килограмм загрузки у этой стиральной машины?
Put that motor in a car and you have an electric Koenigsegg lol
The what? Anyhow, I think the bottom of your car will sit on the road surface.
at 0.24 for a few seconds in the top right it looks like the contractors are giving off some sort of radiation release captured by interference on the camera? or fine white dust . But it looks very similar to how radiation kills off pixels in a sensor.
Bill of this motor is extremely expensive 😅😂
No:)
Its HV so it not consume that much Amps.
A guy put a loco traction motor in a little Toyota MR 2 two seater sports car. Motor in the rear, bunch of lead acid batteries up front in the frunk.
He said it would go 70 mph forwards or reverse in the blink of an eye.
Would be shutting down
3 phase of induction traction motor one by one.
For that rapid acceleration, this must be on a passenger locomotive. I didn't hear a diesel engine running, so I'm assuming it is full electric?
I saw a small photo of a straight, or pure electric locomotive at the end.
1:40 My ps4 at night
Y does a motor sound like a jet?
super wow
much like
Absolutely brilliant video, thanks for sharing
Muito bom.
It really is neat that in their particular aspect they are just like model trains!
The metal dust I can smell it from here
in latvia electric trans start from a stop with a pretty sudden jolt. defo enough to knock someone over if they are standing and not holding onto something. why would this be the case with an electric motor?
Legends watch this on 2x speed🤣🤣😂😂
Is this a electrostar train
I want to learn more about field weakening in motors but I can’t find an information online about it. Only info I’ve ever found is simply “weakens the field to increase current”
The application of power looks very smooth, is there something other than a tap changer varying the motor power?
There is a thyristor controlled rectifier instead of tab changer.
So I understand the contactor and star delta configuration thing, but what do the fielf weakening contactors do? I can see the current going up as they click, so are they some kind of soft start system?
Is the loud hum thing that you can hear from like a mile away, the wheels or the engine? Like it sounds like an electric noise hum like high low. The dododododododo noise.
I have no idea why I am here or why YT recomended it to me ... I like it
Why are there 3 contactors if its a DC motor? I don't know very much about locomotive motors, but I'm a little confused.
For what you need field weakening contactors? and how they work? i think it's connectec with magnetic field of rotor or stator?