Modulation function based SVPWM control method for single-phase open-circuit fault of five-phase permanent magnet synchronous motor

The invention discloses a modulation function based SVPWM control method for a single-phase open-circuit fault of a five-phase permanent magnet synchronous motor, and the method is applied to fault-tolerant control over single-phase open-circuit fault of the five-phase permanent magnet synchronous motor, improves the utilization rate of DC voltage and reduces the operation time. The fault-tolerantcontrol system generates a two-phase static coordinate system modulation voltage instruction and a third harmonic space modulation voltage instruction, and carries out preprocessing to obtain a groupof modulation functions with coefficients as constants. During real-time operation, six sectors are determined, modulation functions of the corresponding sectors are directly called, the modulation functions are directly loaded into a comparison value register of each phase of driving pulse, and the comparison value register is compared with a time base counting register to obtain each phase of SVPWM pulse. By simplifying