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A control method for electrically excited doubly salient motors suitable for hybrid electric vehicles

A technology of electric excitation double salient poles and hybrid electric vehicles, which is applied in the direction of AC motor control, motor vibration suppression control, control system, etc. It can solve the problems of low motor output power, large torque ripple, and insignificant torque ripple suppression. , to avoid dead time and reduce torque ripple

Active Publication Date: 2018-10-09
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The three-phase three-beat standard angle control strategy is simple to implement, but the effect is not good, the motor output power is low, and the torque ripple is large; the three-phase three-beat advance angle control strategy improves the performance of the motor, but the addition of dead time, There is still a large torque ripple; the three-phase six-beat control strategy further improves the performance of the motor, and the torque ripple is correspondingly reduced, but the effective range of the inductance cannot be fully utilized, and it is difficult to give full play to the torque output capability; the three-phase The nine-beat control strategy makes full use of the effective area of ​​inductance change, so that the electrically excited double salient pole motor can obtain a higher output torque, but it still needs to add dead time, so the torque ripple suppression is not obvious

Method used

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  • A control method for electrically excited doubly salient motors suitable for hybrid electric vehicles
  • A control method for electrically excited doubly salient motors suitable for hybrid electric vehicles
  • A control method for electrically excited doubly salient motors suitable for hybrid electric vehicles

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Embodiment Construction

[0034] The object of the present invention is to provide a control method for an electrically excited double salient pole motor suitable for a hybrid electric vehicle. A three-phase twelve-beat control strategy is proposed for opening and closing. On the premise of ensuring the reliable operation of the motor, in order to suppress the torque ripple and increase the output torque, the present invention divides an electrical cycle into 12 stages, each stage corresponds to a conduction mode of a switch tube, and controls the Current flows into each phase, making the motor form 12 working states in one electrical cycle. The invention not only avoids the torque ripple caused by adding the dead time at the time of commutation (that is, the upper and lower switching tubes are closed at the same time), but also can make full use of the effective range of the inductance to pass in the current in the corresponding direction, which improves to a certain extent the output torque.

[003...

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Abstract

The invention discloses a control method applicable to a doubly salient electro-magnetic motor. According to the method, a three-phase twelve-beat control strategy is provided for switching-on and switching-off of a power converter main switch tube based on inductance characteristics of the doubly salient electro-magnetic motor in operation. In the premise of ensuring reliable operation of the motor, in order to inhibit torque pulsation and improve output torque, an electrical cycle is divided into twelve stages, each stage is corresponding to a switching-on mode of the switch tube for controlling a current in the corresponding direction to flow into the corresponding phase, so that the motor forms twelve working conditions in the electrical cycle. According to the motor provided by the invention, the torque pulsation caused by the condition of adding a dead time (namely the time when an upper switch tube and a lower switch tube are simultaneously switched off) into a commutation time is avoided, an effective section of the inductance can be fully utilized to introduce the current in the corresponding direction, and thus the output torque is improved to a certain extent.

Description

technical field [0001] The invention relates to a control strategy for an electrically excited double-saliency motor suitable for a hybrid electric vehicle, and belongs to the technical field of motor control. Background technique [0002] Electric excitation doubly salient motor is developed on the basis of permanent magnet doubly salient motor. The motor replaces the stator magnetic steel of the permanent magnet doubly salient pole motor with the excitation winding, which is easy to realize the field weakening control in the motoring process. This kind of motor has simple structure, low cost, high reliability and good fault tolerance, and has broad application prospects in hybrid electric vehicles, aviation and other fields. However, similar to switched reluctance motors and permanent magnet double salient pole motors, electrically excited double salient pole motors also have relatively obvious torque ripples during operation, resulting in problems such as high rotational...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P23/04H02P23/28H02P25/02H02P27/06
CPCH02P23/04H02P25/02H02P27/06
Inventor 车帅任乃飞王权
Owner JIANGSU UNIV
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