Study On Torque Performance Of Six-phase Asynchronous Motor

With the progress of science and technology, large capacity adjustable-speed systems appear in industrial application, so it provides a good chance for the development of multiphase motor adjustable-speed system. Compared with three-phase induction motor drive systems, multiphase induction motor drive systems in power, high reliability and low voltage power supply applications have obvious advantages. But, as a new kind technology of motor control, multiphase motor systems in theory and practice exist complex problem which worth studying and discussing. This paper mainly studies in direct torque control of six-phase induction motor's torque characteristics. First, choose six-phase motor control strategy, and then through the theoretical analysis study induction six-phase motor's torque, then through the finite element analysis studies the torque characteristics in small slip. Finally, through matlab modeling and simulation studies six-phase motor's l torque characteristic under direct torque control. In direct torque control of six-phase induction motor, torque basically and torque current amplitude is proportional. Like DC motor's control, only changing the torque current amplitude can change six-phase induction motor's torque. Direct torque control of induction motor, starting torque and maximum torque are very large. In other words, six-phase induction motor has good starting ability and transient overload ability. Eliminates the torque fluctuations, and basically realizes constant torque start, provises a theoretical basis for six-phase motor control.