Control method of electrically excited doubly salient pole motor based on torque closed-loop suppression of torque ripple

Abstract

The invention discloses a control method for an electrically excited double salient pole motor based on a torque closed-loop suppression of torque ripple, and relates to the field of an electrically excited double salient pole motor. Fixed value, the motor torque feedback value is determined by the motor rotor position and the phase current values ​​of the three phase windings, and the first control signal with a predetermined duty cycle is generated according to the motor torque given value and the motor torque feedback value, according to the first The two preset correspondences determine the second control signal corresponding to the rotor position of the motor, and the drive signal is generated by the first control signal and the second control signal to drive all the power tubes in the three-phase bridge power circuit. This method adopts a torque closed-loop instead The current closed loop directly controls the output torque of the motor, which can effectively suppress the torque ripple in the commutation and non-commutation stages, and the control structure is relatively simple.

Description

technical field [0001] The invention relates to the field of electrically excited double salient pole motors, in particular to a control method for electrically excited double salient pole motors based on torque closed-loop suppression of torque ripple. Background technique [0002] Electric excitation doubly salient motor is developed on the basis of permanent magnet doubly salient motor. The stator of the motor adopts excitation winding instead of the stator magnet of permanent magnet doubly salient motor, which is easy to adjust the excitation, and is convenient for field weakening control and Magnetic etc. The electrically excited doubly salient motor has the advantages of simple structure, low cost, high reliability and good fault tolerance, and has broad application prospects in hybrid electric vehicles, aviation and other fields. [0003] However, as a reluctance motor, due to the double salient pole structure of the stator and rotor of the electrically excited doubl...

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Problems solved by technology

"A Torque Control Method for Electrically Excited Doubly Salient Motor" (Application No.: CN201811346348.0) published by Zhang Zhuoran et al. proposes a double closed-loop control structure for speed and torque, which can directly control the closed-loop torque However, after the state switching process, due to the continuous flow of phase current, there is still a large commutation torque ripple

"A Control Method for Reducing Torque Ripple of Electrically Excited Double Salient Motors" published by Xiong Lei et al. (Application No.: CN201911124214.9) proposes a three-closed-loop control structure for speed, torque, and current. The torque ripple of the phase, combined with the current inner loop to suppress the torque ripple during commutation, has a good effect on torque ripple suppression, but due to the relatively complicated design and implementation of the current distribution function, the calculation amount of the system is increased

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