Current-source type dual-three-phase permanent magnet synchronous motor drive system and method for SiC device

Abstract

The invention discloses a current source type double three-phase permanent magnet synchronous motor driving system of SiC device adopting soft switching technology, The system includes two motor stator winding ports on the side of double three-phase permanent magnet synchronous motor, two current source inverters connected in series with each other, two three-phase filter capacitors, DC bus inductance, power chopper, voltage source and zero voltage switching auxiliary circuit. The method comprises the following steps: a control process of the current source inverter 1, a control process of thecurrent source inverter 2, and a control process of the soft switch. The multi-phase winding is fed by two current source power converters in series, The reliability and fault tolerance of the motordrive system are improved, and the soft switching technology and active damping technology are adopted at the same time, which makes the switching of SiC device flexible, suppresses the electromagnetic interference problem caused by the high frequency operation of SiC device, improves the performance of the motor drive system, and has the advantages of small torque ripple and strong fault tolerance.

Description

technical field [0001] The invention belongs to the field of motor drive, and relates to a multi-phase motor drive system, and more specifically relates to a current source type dual-three-phase motor drive system and a control method thereof. Background technique [0002] At present, the power of the motor system is continuously increasing, and the size of the corresponding motor is also continuously expanding. The stator winding of the traditional three-phase motor system is three-phase, and the power of the motor is increased by connecting the three-phase windings in series and parallel, and the three-phase power converter is used to feed the motor. However, the windings of this traditional three-phase motor are concentrated and distributed throughout the entire space of the motor, which is not conducive to the modular production and assembly of the motor. The continuous increase of motor power has brought greater difficulties to the production and assembly of motors. W...

AI Technical Summary

Problems solved by technology

Most of the traditional motor drive system soft switching technologies are aimed at voltage source converters, and have not yet achieved technological breakthroughs in current source soft switching.

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