Theoretical Study of Space Vector Pulse Width Modulation Control Strategy Based on DSP

摘要

Space vector pulse width modulation technology is a relatively novel control method developed in recent years. It is a pulse width modulation wave generated by a specific switching mode composed of six power switching elements of a three-phase power inverter, which can make the output current waveform May be close to the ideal sinusoidal waveform. Space vector pulse width modulation is based on the overall effect of the three-phase output voltage, focusing on how to make the motor obtain the ideal circular flux linkage. Compared with the sinusoidal pulse width modulation, the space vector pulse width modulation technology has a small harmonic component of the winding current waveform, which reduces the motor torque ripple, and the rotating magnetic field is closer to a circular shape, and the DC bus voltage utilization rate is greatly improved. And easier to digitize.