There are advantages and disadvantages of dc motor controller

Is the so-called 'golden no pure gold, no one is perfect', not perfect physical objects. Dc motor controller is no exception, it has advantages and disadvantages, to introduce below small make up. 1. Because of its potential waveform is better, so there is less affected by electromagnetic interference. 2. Because of its wide range of speed regulation, so the speed control features smooth. 3. Because of its overload ability is stronger, therefore has the larger starting and braking torque. Although the dc motor controller has these advantages, but because of commutator, so its manufacturing complex, and the cost is higher.