Memory motor magnetic adjustment control method and system based on zero-sequence magnetic adjustment

Abstract

The invention discloses a memory motor magnetic adjustment control method and system based on zero-sequence magnetic adjustment, and the method comprises the steps: (1) enabling a winding on a memorymotor stator to employ an integrated winding which integrates the functions of an armature winding and a magnetism adjusting winding, and enabling a first inverter and a second inverter, which are connected in parallel, to be connected with the integrated winding; (2) when a memory motor normally operates without magnetic adjustment, generating a switching signal in a space vector modulation modeaccording to the detected rotor electrical angle theta e, the three-phase current Iabc and the rotor rotating speed omega r of the memory motor, and driving two inverters to perform vector control onthe integrated winding of the memory motor; and (3) when the memory motor needs to be subjected to magnetic adjustment, determining the magnitude of the output zero-sequence current according to a magnetization state selector in the voltage modulation process by utilizing SVPWM, and changing the action time of the zero vector to generate the required magnetic adjustment current, thereby realizingthe magnetic adjustment of the permanent magnet of the memory motor. The method is low in redundancy, and the torque density of the motor is improved.

Description

technical field [0001] The invention relates to the control technology of memory motors, in particular to a method and system for controlling magnetic field regulation of memory motors based on zero-sequence magnetic regulation. Background technique [0002] The traditional memory motor is developed from the write-pole motor, and the rotor is composed of AlNiCo permanent magnets, non-magnetic interlayers and rotor cores to form a sandwich structure. This special structure can realize the online repeated irreversible charging and demagnetization of the permanent magnet at any time, and at the same time reduce the influence of the quadrature axis armature reaction on the air gap magnetic field. However, since the permanent magnet is located in the rotor, the armature winding must have two functions of energy conversion and magnetic field adjustment, which greatly increases the difficulty of online magnetic adjustment, and the entire rotor is composed of multiple parts, which a...

AI Technical Summary

Problems solved by technology

For the existing DC magnetic modulation memory motor, there are two sets of windings on the stator side, one is the armature winding, and the other is the magnetic modulation winding, that is, the drive control and magnetic modulation control functions of the motor are decoupled. This greatly reduces the difficulty of online magnetic regulation control, but the motor structure is relatively complicated

However, the magnetic modulation winding of the DC magnetic modulation memory motor has redundancy during the normal operation of the motor, which leads to the problem of large volume and low torque density of the entire system.

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