DSP-based Subdivided Driving Control And Torque Vector Control Of Two-phase Hybrid Stepping Motor

The thesis develops a DSP-based digital control system for a two-phase hybrid stepping motor. This system is mainly constructed from a TMS320LF2407A DSP which is used as the core of control parts and a dual full-bridge driver L298 which is used as driving parts. Combined with other circuits and apparatus, the system fulfills the digital motor control. Meanwhile, after using SCI (Serial Communication Interface) programs there realize the communication between the motor control system and the host computer.The thesis analyses the electromagnetic restricted relation of two-phase hybrid stepping motor and sets up its mathematics models. After that the thesis presents two control methods: the subdivided control method and torque vector control method. And simulations are done by using the SIMNLINK toolbox in MATLAB. Using subdivided control method in the system can markedly decrease low frequency vibration of the motor, and can enhance motor's accuracy. Using torque vector control method can increase motor's output torque, and can upgrade motor's dynamic characteristic.Finally, the thesis gives and analyses running results of the motor control systems after using different control methods. The results show that the DSP-based digital control systems of the two-phase hybrid stepping motor have the desired performances.