节能型直接电磁转矩负载的交流调速系统研究(英文)

A Study of Energy-Saving AC Speed-Governing System with Electromagnetic Load

介绍一种高效节能、双逆变器结构、差频控制的交流调速实验系统系统。实现了一种两逆变器直流母线并联运行差频控制驱动电动机 -电动机结构方式的拖动系统。这是一种创新结构的调速系统 ,由于建立了同轴电磁转矩方式的负载关系 ,省去了传统的电动机 -发电机系统结构下的能耗电阻箱。系统实现了再生能量的全部回馈利用 ,调速系统消耗的电源功率仅仅是用于系统电动机激磁、损耗和变频器的开关损耗等。

A new kind of variable frequency speed-governing experiment system which has the structure of two parallel inverters at DC bus and output of inverter driving two series asynchronous motors at the same shaft is presented in this paper. The results of the experiment show that this creative AC variable frequency speed-governing experiment system can: a) realize the load relationship of direct electromagnetic torque between the motor group;b) get the continuous control process easily for the reaction load and potential energy load during four quadrant; c)achieve the total availability of the regenerated energy at any kind of load.The system's power consumption makes up under 30% of actual load power at any kind of load.