Dc motor controller can not be able to connect to an alternating current

In the use of dc motor controller can connect the ac? Let's look at. Dc motor controller is used to direct current (dc) can be converted into mechanical energy, or convert mechanical energy into direct current to the rotation of the motor controller. It can realize dc can mutual transformation and mechanical energy. When used as a motor can convert electrical energy to mechanical energy. And when used as a generator controller, can convert mechanical energy to electrical energy. Therefore, the dc motor controller in use process, can not connect the ac. Of course have to connect, you can access a first filter rectifier, stable alternating current into direct current (dc) can.