Posts Tagged ‘motors’

Electric Motors: “DC Motors and Generators” pt3-3 1961 US Army Training Film

Thursday, March 7th, 2013

more at scitech.quickfound.net “DC MOTORS AND GENERATORS… DESIGN, APPLICATION, AND OPERATION OF BASIC, SERIES, SHUNT, AND COMPOUND WOUND TYPE DC GENERATORS AND MOTORS.” US Army training film TF9-3106 Public domain film from the National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and mild video noise reduction applied. The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and equalization (the resulting sound, though not perfect, is far less noisy than the original). Split with MKVmerge GUI (part of MKVToolNix), the same software can recombine the downloaded parts (in mp4 format): www.bunkus.org part 1: www.youtube.com part 2: www.youtube.com en.wikipedia.org A DC motor is an electric motor that runs on direct current (DC) electricity… Two important performance parameters of DC motors are the Motor constants, Kv and Km Brush The brushed DC electric motor generates torque directly from DC power supplied to the motor by using internal commutation, stationary magnets (permanent or electromagnets), and rotating electrical magnets. Like all electric motors or generators, torque is produced by the principle of Lorentz force, which states that any current-carrying conductor placed within an external magnetic field experiences a torque or force known as Lorentz force. Advantages of a brushed DC motor include low initial cost, high reliability, and simple control of motor speed. Disadvantages

Why don’t more SUVs and Trucks have electric motors?

Saturday, September 22nd, 2012

Question by J.D.: Why don’t more SUVs and Trucks have electric motors?
Diesel trains use electric motors because the low-end torque is much greater than a mechanical drive drive train, I was wondering, since low-end torque is essential to starting with heavy dead weight, why more trucks and SUVs don’t have electric motors on the wheels?
PMack – Diesel trains have a diesel engine, but the engine generates electricity that it sends to electric motors attached to the wheels.

Old Man Dirt – Good points, thank you.

Best answer:

Answer by pedro7of9
adds weight
cost a lot
they run well as is

trucks go around corners and stop often…trains dont

Know better? Leave your own answer in the comments!

Points and LEDs (With Under-mounted Motors)

Wednesday, April 11th, 2012

Hello. i have been working on getting these LEDS with my layout and a master switch board! this is what i have come up with! Thanks to members from RailpageAustralia it is much simpler that what i originally was thinking! I will upload a video with the layout of the wiring and everything soon!

where could i look up diagrams of prewar lionel train motors?

Monday, March 26th, 2012

Question by garchompagin: where could i look up diagrams of prewar lionel train motors?
im currently working on a 752w engine and i belive when i got the engine, it was put together wrong. if you know a website add a link if you could.

Best answer:

Answer by david c
I did two goog searches using these terms:

Lionel 752w engine
and
diagrams of lionel train motors

Looks like there are a few books
that are published on the subject.
Kalmbach publishes one of them.

I’m not that familiar with train stuff,
but I’m willing to bet you could find a good
contact through one of those links.

Give your answer to this question below!

Why can’t we make trucks like trains, run by electric motors and charged by small diesel generators?

Saturday, February 4th, 2012

Question by FreddieOh!: Why can’t we make trucks like trains, run by electric motors and charged by small diesel generators?

Best answer:

Answer by artgrantz
Trains are not charged by small deisel engines, they are charged by large deisel engines. Besides the weight of the engine you would need to add the weight of the batteries and the electric motors. A lot of space would be needed.
Trains are efficient because they can slowly build up speed and then cruise along without stopping. Trucks have to operat ein traffic where they start and stop frequently.

What do you think? Answer below!

what type of dc motors used in electric trains and why?what are the advantage of dc motors ?

Friday, April 29th, 2011

Question by vijay a: what type of dc motors used in electric trains and why?what are the advantage of dc motors ?
i wish to know more about dc motors and its applications in electric train applications

Best answer:

Answer by mike p
DC motors are easyer to contron torque and speed by varying the power to armature and field leads. And in braking conditions, they actually turn into generators putting energy back into the grid.

What do you think? Answer below!

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