Pulse width modulation(PWM) is used to make the speed more stable,and the strength is high at low speed This is a DC brush motor controller,so please don't use it on AC motors The speed controller is widely used in industrial DC motor speed regulation,DC fan,etc Adopt the motor of speed control mode,it has stable performance,the speed can be adjusted and it is easy to install The PWM motor speed controller is made of high-quality electronic components with stable and reliable performance