[Dr_C2]

I used to have a Novak programmable ESC and you could change the frequencies which had noticeable benefits depending whether you were racing onroad or offroad cars.

This from Hobbywing website:

Lower frequencies (4K-8K) create a punchy feel but generate more heat. Higher frequencies (12K-16K) provide smooth operation and run cooler.

Thanks Kevan, that’s very helpful.

The Texas Instruments IC I am using requires a motor PWM signal in the range 15kHz to 100kHz, so in due course it will be interesting to learn whether the trend you are describing extends to higher frequencies for the types of motor I am using. I plan to start with 15.7kHz (16MHz chip oscillator divided by 4 then divided by 255)

Also, I read that heat due to MOSFET switching increases as frequency increases. So it may be, as per your reference, that motors run cooler but the electronics runs warmer as frequency increases? Let’s see.

These of course are all second order effects to be explored if the first order effects are proven successful … i.e. if we can show that sensored brushless motors are a viable option for digital slot car racing.

Next, it’s time to fit these motors and matching drive modules into some NSR chassis that are patiently waiting for fit-out :)

c