![]() This could be ideal for a wheelchair controller or electric bike. Speed control can be achieved via a built-in trimpot, an external 5k potentiometer, or a motorcycle throttle based on a Hall Effect sensor. If you don’t need motor direction reversal, you can just do the PWM control stage of the circuit The second section adds the relay circuit and logic control. The first is basic speed control with two parallel Mosfets and a dual op amplifier to provide pulse width modulation (PWM). The logic control of the reversing circuit means that it can only change direction when the motor is stopped. It can operate from 12-32V batteries at currents up to 30A. The DC Motor Speed Controller uses a pair of high power Mosfets connected in parallel to drive the motor and relay circuitry to make the motor reversible. It features soft start, relay switching of motor direction and PWM speed control. 12-32V 30A motor speed control soft start circuit, relay switching motor direction PWM speed control circuit 30A Motor Speed Control CircuitĪccording to the DC Motor Speed Controller High Power, materials that are easy to build can be found between 12-32V and 30A. ![]()
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