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Can you use a 240 v light dimmer to control the speed of a 12/24 v wheel chair motor ? Answered

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steveastrouk
steveastrouk

Answer 9 years ago

I will reckon he'll need up to 50A for a wheelchair motor though. Its a beast of thing to drive.

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Re-design
Re-design

9 years ago

No.  It's a different technology.  One is a/c and the other is d/c.  Controlling the motor is going to take a high amp. dc motor controller.

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hoplite66
hoplite66

Answer 9 years ago

 I am new to this electronic lark so do not have much of a idea as to what can and can not be done.
Thank you all for your answers.
I will try to make sense of it all.
hoplite66

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doctorbigdaddy
doctorbigdaddy

Answer 9 years ago

How many amps would you guess?Also, since the throttle is very small potentiometer, I am guessing it operates a relay in the actual motor control console in the rear rather than taking the entire load.But thats why I need help. Thank you for your help!

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Re-design
Re-design

Answer 9 years ago

If you have the motors they should be marked, but 35 amps is very common on the wheel chair motors.

This link should get you started on the right track learning about controllers.

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steveastrouk
steveastrouk

9 years ago

IF you have a 240V supply, then probably Yes, if you use a transformer to generate the 12/24V.

The caveat is because a large transfomer is a pretty rough load for a standard lighting dimmer.

Steve

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Re-design
Re-design

Answer 9 years ago

There is always the other side of the coin.  I didn't even think about this way of working it.  I guess a second point of view is a good thing.

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steveastrouk
steveastrouk

Answer 9 years ago

I also should have added "and  a hefty bridge rectifier". It works quite well, though for complicated reasons, the transfomer needs to be ~50% bigger than the naked Watt rating of the load

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RavingMadStudios
RavingMadStudios

Answer 9 years ago

I once had to bodge together a "speed controller" for a 110 VDC gear motor to run it off 110 VAC wall current. I used a wall rheostat and a bridge rectifier, and it worked just fine.

Of course, there was no transformer involved, and the motor only had to run for 20 seconds at at time, twice a day for three weeks, with not very much load....

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kelseymh
kelseymh

9 years ago

No.  You can't use a light dimmer to control motor speed, for the same reason you can't use a regular light dimmer to control a ceiling fan.  You need a motor-controller, as Re-design said, and if you have to buy something, you're best off buying one specifically for your chair's motor.