分级交-交变频高转矩软启动器原理和仿真

Discrete Frequency Principle and Simulation of High Torque Soft Startor

介绍了一种采用分级交-交变频方法,针对交流电机的稳态数学模型,主电路采用晶闸管三相交流调压电路改变电源频率,得到适当电压矢量,使电机在启动过程中获得最大转矩,并采用对称分量法进行理论分析和用Matlab仿真对理论分析结果进行验证,理论分析结果和仿真结果高度统一,证明方案有效性和可行性。

A discrete AC/AC variable frequency theory was introduced to get a variable frequency voltage to start a AC motor to get a bigger torque in the starting process based on the AC motor steady modle, and the main circuit uses the former thristor three phase AC conditioning voltage circuit. It made the theory analysis about the symmetry component theory, and made use of Matlab to set up a corresponding modle to get a result. The theory result is the same as the Matlab result . It is proved affect and feasible.