求助英文翻译～急！

Who can help to translate the meantime, I would be grateful Xiaodi, the direct use of the GOOGLE will not need a translation, simply unreasonable.
Subject to the electrical control experimental platform to develop a DC motor speed regulation system, and Motor function, and gives the appropriate design. DC motor has a good effect braking performance, easy in a wider range smoothing speed, controlled in many high-performance electric drive system is widely used, such as rolling mill, the goal planer, and high-level elevator, high-precision machine tools, and so on. DC motor speed to achieve the first to convert AC DC, which requires rectification circuit. Rectifier circuit there are many, the choice of this topic is controlling the whole three-phase rectifier circuit. This paper describes the circuit design, the choice and protection of components, modules on the trigger of the circuit and hardware to achieve. Can be directly subject to the completion of 220 V, 5.3A DC motor power supply to achieve speed control function.