Research on Electromagnetic Vibration Suppression Methods for Microcomputer Microelectronic Systems

In the control system of permanent magnet synchronous motor (PMSM) driven by inverter, the traditional Space Vector Pulse Width Modulation (SVPWM) technology will produce high frequency current harmonics at the switching frequency and frequency doubling of inverter, the high frequency electromagnetic vibration of PMSM will be produced in the process of operation. Therefore, a double random SVPWM control method combining random switching frequency and random zero vector is proposed, which is applied to the harmonic spectrum expansion of high frequency current of permanent magnet synchronous motor, the method can disperse the high frequency harmonics concentrated in the switching frequency and its double frequency, and effectively weaken the high frequency electromagnetic vibration.