John Rahn wrote: : Thanks, that's what I figured, but found that a lot of the : documentation is kinda confusing on that subject ...
Well,
Remember his "mostly"? Frequency plays some part too. Anyone that has raced RC cars can tell you that response to speed changes and the "punch" that a motor has depend on the frequency of the PWM signal as well as the PWM percentage. To avoid the "dissertation" lets just say that cheapo motors will want a lower PWM frequency than expensive ones. The higher the frequency, the "softer" the motor response and power can tend to be. For most cheap motors, 500Hz to 1KHz is your best power frequency - It'll sing, but they'll run find. Your $50 Escap motors will be very happy with 20KHz PWM frequencies. You'll see that you will have more torque with the lower frequencies, but you'll have smoother power transfer with the higher ones.
Sound like fun? DLC