Axial electrical excitation composite rotor circumferential misplacement reluctance motor control system and method

Abstract

The invention discloses an axial electrical excitation composite rotor circumferential misplacement reluctance motor control system and method, and belongs to the technical field of electrical appliance automatic control. The axial electrical excitation composite rotor circumferential misplacement reluctance motor control system comprises a DSP (Digital Signal Processor), a position sensor, a speed sensor, a current sensor, a level reversion chip, a three-phase asymmetrical half-bridge power converter, a driving circuit and the like. A controlled motor comprises a motor revolving shaft, a magnetic conductive material, a central electric excitation coil, a stator salient pole, a rotor salient pole and the like. The method comprises the following steps: generating a new PWM (Pulse-Width Modulation) duty ratio according to data transmitted by the position sensor, the speed sensor and the current sensor through the DSP; and adjusting current of a three-phase winding or adjusting current of the electric excitation coil. The electric excitation coil is arranged between two groups of stators, and a rotor circumferential misplacement structure is adopted for running, so that crest connection of torque between two sets of stators and rotors is realized effectively. Double-closed-loop PI (Proportional-Integral) control is adopted, so that the dynamic response speed and interference resistance of the control system are improved greatly, and efficient continuous speed adjustment control of a motor can be realized easily.

Description

technical field [0001] The invention belongs to the technical field of electric appliance automation control, and in particular relates to a control system and method for an axial electric excitation compound rotor circumferential displacement reluctance motor. Background technique [0002] Torque ripple and loud noise are two factors that limit the application of electric motors. Torque ripple means that within a commutation cycle of the motor, the difference between the maximum value and the minimum value of the output torque is too large, causing the motor to vibrate. The torque ripple is more obvious when the motor is far away from the design point, especially in electric vehicles, textiles, etc. And other industries that require high motor output torque. There are two main reasons for the torque ripple: one is that the special double-salient pole structure of the motor determines that there must be a large torque ripple, especially at the position where the stator and ...

AI Technical Summary

Problems solved by technology

There are two main reasons for the torque ripple: one is that the special double-salient pole structure of the motor determines that there must be a large torque ripple, especially at the position where the stator and rotor are aligned, where the reluctance is the smallest and the flux linkage is saturated. The phase torque output is the smallest; the second is that the motor is used in the operating environment that requires frequent switching of the power converter, that is, the complex voltage harmonic components other than the fundamental wave will be generated during frequent switching, which will also cause the pulsation of the motor

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