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Topic: 6V motor powered by a 24V battery (Read 1 time) previous topic - next topic

simplex

6V motor powered from a 24V battery

Is it possible to power a 6V motor from a 24V battery if I switch on an off the power with a certain frequency and filling factor.
If yes, how can I calculate the optimum frequency and filling factor of the PWM signal that drives the switch?

retrolefty

How about just having a 25% (or less) duty cycle applied to a PWM output signal?

Lefty

simplex

#2
Oct 22, 2012, 01:41 am Last Edit: Oct 22, 2012, 01:43 am by simplex Reason: 1
If the motor were a pure resistive load a duty cycle of 1/16 (P=U^2/R) would do the job.

dhenry

Quote
Is it possible to power a 6V motor from a 24V battery if I switch on an off the power with a certain frequency and filling factor.


Yes.

Quote

If yes, how can I calculate the optimum frequency and filling factor of the PWM signal that drives the switch?


To answer that question, you have to define "optimum" for us.

simplex

I mean the duty cycle and frequency for which the motor reaches an efficiency as close as possible to that of the case when it is powered from a 6V battery.

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