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Generators & Electric Motors General Discussion Antique Generators and Old Electric Motors: Questions and answers about restoring and showing old power generation systems.

Generators & Electric Motors General Discussion

DC Motor Question


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  #1  
Old 12-11-2018, 10:41:32 PM
uglyblue66 uglyblue66 is offline
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Default DC Motor Question

I have been contemplating building a electric garden tractor from parts for a long time . I want a hydrostatic transmisson and have 1 from a large cub cadet late model that was made to pull heavy stuff.
The old E8 and E 10 Electracs I have use a shunt stabilized dc motor. the deck motors are Pm motors.
Now,I don't understand alot of what that means.
The E8 and E 10 do not use a speed control on the motor, it is simply turned on or off. In my application I would be using the transmission for speed and direction.

I am thinking a 3 hp unit should work but am having trouble understanding shunt wound,shunt stabilized and so forth.

Can someone give me a bit of schooling? I would apprciate it.
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Old 12-11-2018, 11:51:12 PM
Thaumaturge Thaumaturge is offline
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Default Re: dc motor question

I'd check wikipedia for the shunt motor info. Myself I'd look into the DC motors and controllers used in the electric scooter field. Try http://tncscooters.com or even ebay for parts. I know tncscooters offers free download of data sheets for any of the controllers they sell.
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Old 12-12-2018, 07:46:07 AM
Joe Romas Joe Romas is offline
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Default Re: DC Motor Question

Being limited by the limited amount of electricity stored in the battery I would start by eliminating all unnecessary power drain and instead of a hydraulic transmission opt for controlling ground speed I would use PWM (pulse width modulation) on the motor. I believe that's how electric scooters and the like are operated. In PWM the power is electronically switched on and off in in varing rates to control speed and saving power.
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Old 12-12-2018, 08:49:17 AM
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Elden DuRand Elden DuRand is offline
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Default Re: DC Motor Question

I agree with Joe. Hydrostats are power hogs. The trade with them is that you have continually variable speed.

A PWM controller is the way to go. You might find what you want on Ebay. There are a lot of imports out there that should do the job.
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