treadmill speed control help

Thread Starter

majorkuso

Joined Aug 21, 2009
56
We have a treadmill, but the motor control and psu unit died(one unit).What I am trying to do is control the speed of the motor with preferably a 555 timer. the motor is a DC 2hp 90v rated at 20 amps. i have a few power mosfets one rated at 100v at 100 amps. We have a fwb rectifier that drops the unregulated voltage down to about 90. i think I am overthinking the driving of the motor. i thought about putting a zener regulator to supply the power to the timer circuit but am not sure about driving the mosfet and motor.
 

Dodgydave

Joined Jun 22, 2012
8,681
Are you thinking of using a 555 in pwm mode to drive the mosfet, running the motor direct from the mains via a bridge rectifier?
 

Thread Starter

majorkuso

Joined Aug 21, 2009
56
the speed controller that was bought to run it could handle the rated current. i am trying to create a custom solution.
 
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