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Posted by Mark Haase on July 22, 2005, 3:12 am
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> I have two Sugesstion ...
>
> 1. Operate both motors at diffrent voltage to make their RPM Equal.
> 2. Attach some High Value Resistors to one motor and apply same voltage
> to both motor
> to make their RPM equal.
#1 is possible, but I suspect that the motors will respond differently
to different loads, so that if it goes uphill your required voltage
differential might be different than when its on a flat surface or going
downhill. Also, the question of how to operate them at two different
voltages is unanswered.
#2 Is an answer to #1, but unless these are very small motors you will
a) have a hard time finding resistors large enough to dissipate that
much power, and b) even if you do you'll still be wasting a lot of power
through those resistors.
The best solution here -- if not the easiest -- is to implement a closed
loop controller, e.g. PID controller.
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mehaase(at)sas(dot)upenn(dot)edu
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>
> 1. Operate both motors at diffrent voltage to make their RPM Equal.
> 2. Attach some High Value Resistors to one motor and apply same voltage
> to both motor
> to make their RPM equal.