PWM Frequency
 

How do I find out the PWM frequency of a motor. It's a brushed Mardave G2.

Thanks

The motor has no frequency as such really, its just dc voltage to drive it, any frequency would be generated by the speed control I would have thought, like at low speeds:confused:

Ohh, I thought it had something todo with the motor :lol:

I can change it in the speed controller setting, but i need to know the frequency.

Simply speaking, Esc frequency is to do with the amount of steps in the throttle range. Think of the old wiper speedos, they only had three steps, or three speeds if you like. New escs have hundreds of steps in the throttle range, but the amount of steps is adjustable. the lower the frequency, the less steps (thus a bigger jump in speed between these steps), the higher the frequency, the more steps (thus a smoother feeling throttle).

The other thing to be aware of is, the higher the frequency, the hotter the esc will run.
hope this helps

Oh, that makes sense.

Thanks for explaining :thumbsup:

I don't really want to get into a full blown explanation of Pulse Width Modulation but very briefly the granularity of duty cycle (number of speed gradations) is a separate parameter to the modulation frequency. https://en.wikipedia.org/wiki/Pulse-width_modulation.

Increasing the frequency will not give you more control "steps" but it will make the motor run more smoothly and respond to input faster up to a point but the flip side is that you loose power transmission efficiency (generate more heat) as you increase it so its a trade off.

you are not really likely to notice much of a difference, maybe a little smoother. only ever used the frequency setting once other than when experimenting, and that was sorting out an interference problem