To improve the efficiency of the dc motor controller

Dc motor controller is a can realize the dc motor controller and mechanical energy conversion from each other, in all walks of life are used. So, how to improve the work efficiency in the process of use? Below small make up to introduce several methods. 1. Can through to the copper loss and iron loss reduction, or increase the size of the dc motor controller, to improve the work efficiency. 2. If a brush motor controller, can by copper commutator change into carbon commutator, to improve the work efficiency. 3. And if the brushless motor controller, the rotor of the problem, you can use higher performance of the permanent magnet material to improve the work efficiency. That is to improve the efficiency of dc motor controller, you can consult it.