I have a treadmill motor I'd like to use for a future project. Voltage across the 0.9 Ohm motor is ~14Vrms at lowest speed, and it's powered by a ~10% duty 120V PWM (I don't know why the numbers are off... perhaps my digital oscilloscope is inaccurate?)
I measured no-load current to be around 4.5A, and 7-12A with me standing/walking on it (the treadmill is rated at 12A).
My question is, if I were to supply 14VDC to the motor with no PWM, what kind of current could I expect to get? The speed would be the same.. but could the current reach the same levels?
My project involves being able to reverse the motor but motor drivers and DPDT relays rated for 120VDC and > 15A are expensive.
Any help is greatly appreciated.