Upcoming project I need to speed control DC motor rated at 24VDC@2A Max.
Lab has 12VDC@2A and 50VDC@10A PSU only.
I thinking why not try run DC motor rated at 24VDC@2A Max with 50VDC@10A PSU if I keep 40% or less duty cycle?
PWM frequency is be 20kHz or more.
Is this good idea without burning or damaging that motor?
If this possible, what maximum voltage I can use (after adjust duty cycle properly).
For example, will it be good to try run this same motor off 100V at 20% or less duty cycle?
Would be positive temperature coefficient thermistor (PTC) be fast to save motor from damaging if PWM circuit or HBridge fail (so motor exposed directly to full PSU voltage and current).
Is polyfuse and PTC same thing or polyfuse faster than PTC (asking as polyfuse uses in computers and saves ports like USB from overcurrent very fast)