What kind of Electric Motor do I need?

AI Thread Summary
The discussion focuses on selecting the appropriate electric motor for a mobile trolley, specifically a DC motor with 2HP, 400 Nm torque, and a 12V/24V voltage requirement. Participants suggest considering a PMDC motor for its suitability, while also discussing the option of using either one motor for both wheels or two separate motors. The need for a differential is highlighted, with the consensus that a single motor setup would require one, while two motors could allow for independent wheel speed adjustments during turns. Concerns about steering force when turning corners are noted, emphasizing the importance of torque management. Overall, the choice of motor configuration impacts performance and maneuverability.
namith11
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I am looking for a DC Motor with the given specifications:

Power: 2HP
Torque: 400 Nm
Voltage: 12V/24V
Current: 120 A
Number of Drive Wheels: 2
Diameter of drive wheels: .435m

Gear Reduction set up: Worm drive arrangement
Total weight being driven: 650kgs
Speed at motor: 1500rpm
Speed at wheels: 50rpm
Gear reduction ratio: 25:1

The motor will run the two driving wheels of a mobile trolley in which basic forward backward motion is required with on/off action. i want to know if i should go with a pmdc(Permanent Magnet) motor or a Servo Motor any why. Also, does it make more sense to have one motor that runs both wheels or should i use two separate motors to run the wheels separately.
Thanks!
 
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Wow ... that is some weird motor (but then I don't have any experience with very high current DC motors). Have you even found any with that kind of spec (24V, 120amp) ?
 
Have you done a search on globalspec.com?
 
A automotive starter will come close to what you want. Keep in mind they are built for intermittent duty.

AceEngineer
 
An automotive off-road recovery winch motor might also fit the bill.
 
Hey,
I found a 12V, 120A motor. But I am trying to figure out if i should go with one motor to run both wheels or two motors(to run each wheel separately). Will I need a differential in both cases or only with the one motor setup? Cause steering will be done manually so I am worried that it will need enormous amounts of force to turn it round corners.
Also, I think i am going to go with the PMDC Motor cause it makes more sense.
 
Hey,
I found a 12V, 120A motor. But I am trying to figure out if i should go with one motor to run both wheels or two motors(to run each wheel separately). Will I need a differential in both cases or only with the one motor setup? Cause steering will be done manually so I am worried that it will need enormous amounts of force to turn it round corners.
Also, I think i am going to go with the PMDC Motor cause it makes more sense.
 
With a single motor you would need a differential, with two motors you would need to make sure the wheels could turn at different speeds while turning, which I think would be possible by simply limiting torque to the "inside" wheel while turning.
 

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