Vector Control System Simulation of Two-Phase Hybrid Stepping Motor.

In order to solve the problems of low-frequency oscillation, high-frequency step-out and torque decline in the open-loop control system of stepping motor used in embroidery machines and flat knitting machines in textile industry, a novel vector control system model of two-phase hybrid stepping motor was established. Based on the two-phase hybrid stepping motor (hybrid stepping motor, HBS) mathematical model, the three-phase space vector pulse width modulation (SVPWM) was used to deduce the two-phase SVPWM method based on the double-H bridge inverter circuit. The coordinate transformation, vector control and PI regulation were also combined to build this novel model under MATLAB/Simulink. The current simulation results show that the current of the motor is stable at 0.3 s after operation. The speed simulation results show that the speed of the motor is stable and without oscillation at 0.018 s at low frequency operation, and the torque is stable after the speed reaches the peak at high frequency operation. Therefore, the scheme can improve the performance of two-phase hybrid stepping motor oscillation and step-out. [ABSTRACT FROM AUTHOR]