How to build snubber...??

Thread Starter

RRITESH KAKKAR

Joined Jun 29, 2010
2,829
Hello everyone,

I need help in building snubber circuit for PMDC motor which sparks very much at low freq ......
The motor was running at 24V ~~2Amps.
 

shortbus

Joined Sep 30, 2009
7,700
It sparks because you are running the controller at too low of a frequency. The normal frequency for PWM of a DC motor is in the 20,000 Hz range. You very the speed by changing the 'duty cycle'(time on), NOT the switching frequency.
 
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