Review of Research on Multilevel Inverter Based on Asynchronous Motor

Multilevel inverter has the ability to make up for the shortcomings of traditional two-level inverter, such as high switching loss, low inverter efficiency and EMI(Electro Magnetic Interference) influence, which are caused by its own topology defects. In this paper, the topological structure, steady state working process and advantages and disadvantages of the three main multilevel inverters based on asynchronous motor are analyzed and compared. The pulse width modulation method for multilevel inverter controlled by asynchronous motor is described. The future development trend of multilevel inverter is prospected.