Research on SVPWM control algorithm based on dual three-phase permanent magnet synchronous motor

Compared with the three-phase permanent magnet synchronous motor, the dual-three-phase permanent magnet synchronous motor has the characteristics of high reliability, small torque fluctuation, and strong fault tolerance, which is suitable for application in the fields of ships, aerospace, and electric vehicles. However, due to the presence of harmonic sub-spaces in dual-three-phase permanent magnet synchronous motors, small voltage distortions can lead to excessive harmonic currents. In this paper, the dual-three-phase permanent magnet synchronous motor is used as a research object, and a control algorithm is designed to suppress its harmonic current. The traditional 48-sector SVPWM does not take into account the simultaneous action of the three-phase bridge arm of the same group of inverters during sector conversion, so it generates a large harmonic current when sector conversion. Therefore, this paper proposes an improved 48-sector SVPWM, which makes a partial adjustment to the vector selection of each sector based on the traditional 48-sector SVPWM, so that the zero vector selection of each sector is the same, avoiding the situation that the same group of three-phase bridge arms acts simultaneously when the sector is converted. The basic principles of improving the 48-sector SVPWM are introduced in detail, and the simulation analysis is carried out in MATLAB, which verifies the correctness of the theoretical analysis in this paper. The results show that this algorithm not only inherits the advantages of the traditional 48-sector SVPWM that is easy to implement in hardware, but also further reduces the harmonic current of the stator.