说明：  本文就调速系统的种类进行了简单介绍，着重分析了变频器的工作原理、控制方式、选型以及变频器在工程实际应用中使用经验，供工程人员借鉴。
(Brief the type of speed control system, analyzed the working principle of the inverter control mode selection, as well as the inverter used in the practical application of engineering experience for engineering personnel learn.)