Research On Speed Regulation System Using Cascade Control Method With IGBT Chopping

Speed regulation system using cascade control method with thyristor is a low-cost system, but the classic system has some shortages, such as low power factor, serious harmonic pollution and etc. In this paper, the primary factors affecting the power factor of the system is discussed; Some novel schemes with high power factor proposed in recent years are compared, and a novel scheme using chopping control method with IGBT is discussed in detail, its parameters of each link and power factor calculated in theory; in the last, a power electric circuit test platform is set up, and a digital control scheme based on integral separated PI algorithm is designed and actualized with double pieces of C8051F310 system. The results produced by calculation and examination shows that the novel scheme can raise power factor in a great deal. In addition, the capacity of the reverse transformer is smaller than that of classic system, so the harmonic pollution is restrained in certain degrees.