A control method for dual three-phase permanent magnet synchronous motors that alternately executes sampling and control programs

Abstract

The invention discloses a dual-three-phase permanent magnet synchronous motor control method for alternately executing sampling and control programs, and belongs to the technical field of power generation, power transformation or power distribution. By alternating the sampling time of the two sets of windings of the motor, the loading vector time and the reference value tracking time with half the sampling period, the present invention doubles the equivalent sampling frequency of the motor control system without changing the sampling frequency of a single set of three-phase windings. times, the control delay and prediction time span are halved. In addition, the present invention uses a two-layer model predictive control strategy to solve the problem of under-actuation in which the controlled dimension of the system is reduced to two dimensions and the control target is still four dimensions caused by the dual three-phase permanent magnet synchronous motor control method that alternately executes sampling and control programs . The dual-three-phase permanent magnet synchronous motor control method that alternately executes sampling and control programs provided by the invention effectively improves the steady-state and dynamic control performance of the dual-three-phase permanent magnet synchronous motor system, and reduces the calculation amount of the control algorithm.

Description

technical field [0001] The invention relates to electrical, motor and power electronics technologies, in particular to a dual-phase permanent magnet synchronous motor control method for alternately executing sampling and control programs, and belongs to the technical field of power generation, transformation or distribution. Background technique [0002] In recent years, in the field of medium-voltage and high-power applications, multi-phase motor multi-level drive systems have attracted more and more attention due to the advantages of low power device stress, high reliability, and high power quality. Among them, the dual-phase permanent magnet synchronous motor drive system has become a very promising new motor drive system with the advantages of simple structure, elimination of six-time torque ripple, and strong fault tolerance. In order to improve the efficiency of the power electronic converter and reduce the capacity of the auxiliary cooling system, the switching freque...

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Problems solved by technology

[0003] The object of the invention of the present invention is to address the deficiencies of the above-mentioned background technology and provide a dual three-phase permanent magnet synchronous motor control method that alternately executes sampling and control programs, by alternately executing the sampling and control programs of dual three-phase windings and corresponding power electronic converters , without changing the sampling frequency of a single set of three-phase windings, the equivalent sampling frequency of the motor control system as a whole is doubled, thus effectively improving the steady-state and dynamic control performance of the motor control system under low switching frequency conditions, and solving the problem of Solved the technical problems of control delay and control performance degradation under low switching frequency conditions of existing control methods

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