Research On DSP-Based SVPWM Vector Control System For Asynchronous Motor

In the recent 20 years, with the appearance of the new power electron apparatus and microprocessor, the accurate asynchronous motor model and all kinds of advanced theories that have resulted in the development of motor control. The motor controller which haves high accuracy and control performance, wide speed regulating range can be realized.Applied the vector control theory, the design of the digital Pulse Width Modulation (PWM) motor speed variation system is proposed in this paper which uses Digital Signal Processor (DSP) TMS320F240 special for digital motor control of TI corporation as the control center and utilizes Intelligent Power Module (IPM) PM25RSB120 of MITSUBISHI as apparatus of the inverter as well as the Space Vector Pulse Width Modulation (SVPWM) as the control algorithm. The DSP-based vector control system platform is designed in this paper.The vector control theory and its decoupling are introduced on the foundation of the mathematical model of asynchronous motor. The variables in 2-phase static coordinates are converted into the variables in rotating coordinates and the components between torque and magnetic field of stator winding current are decoupled which uses the rotor-field-oriented technology. Thus, the speed regulating performance of the asynchronous motor is improved highly. The structure diagram of vector control system which combines the current model of motor is given and provides the theoretical basis for the design of vector control system platform.According to the space vector pulse width modulation technology...