Re: (ET) Lift motor control

[Rod Hower <rodhower ameritech net>]

Ralph,
You should have no problem with this arrangement
if the control is a high frequency (like 20kHz)
switching type (most of them are)
I would add a safety circuit to insure the speed
control didn't go above 1/2.
Even better yet, design a speed control with
a comparator such that it always puts out an average
of 18V regardless of the battery voltage.
I can show you a circuit if interested.
Rod

--- Ralph & Elaine Vogan <ralphgv centurytel net>
wrote:
> Hi,  I was wondering if anyone has hooked a PWM
> controller to a lift motor.  Would it harm the motor
> because it would still be getting 36 volt pulses?  I
> found a place that has 20 Amp 36 volt controllers
> for less than $45.00.  I don't know if they are PWM
> or another type, but if set for 1/2 speed, maybe we
> could get rid of our 18 volt tap.  These controller
> are made for electric scooters.  Also, has anyone
> tried them on lights?  
> 
> Ralph Vogan 
> ralphgv centurytel net 
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