Joel Kolstad wrote:
Franc,

Quick question...

"Franc Zabkar" wrote in message
...

DC motors, eg floor scrubbers and scooters. The usual fault is blown
output devices.


...since it's a "DC" motor, are the speed controllers just a MOSFET (or other
switch) being turned on by a variable duty cycle pulse? ... with a catch
diode in parallel with the motor for when the switch opens? I.e., really just
a giant buck-style switch-mode power supply?




Generally yes, it's a standard PWM DC motor controller.