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A fault-tolerant control method for an axial magnetic field flux switching permanent magnet motor for electric vehicles

A technology of axial magnetic field and magnetic flux switching, which is applied in the field of electric transmission, can solve the problems of motor performance degradation and loss of working ability, and achieve the effect of improving safety performance

Active Publication Date: 2017-05-31
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The power converter is usually caused by an open circuit or a short circuit of the power tube. After the failure, the motor's working performance decreases or even loses its working ability

Method used

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  • A fault-tolerant control method for an axial magnetic field flux switching permanent magnet motor for electric vehicles
  • A fault-tolerant control method for an axial magnetic field flux switching permanent magnet motor for electric vehicles
  • A fault-tolerant control method for an axial magnetic field flux switching permanent magnet motor for electric vehicles

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0031] The invention is directed to a fault-tolerant control method for an axial magnetic flux switching permanent magnet motor for an electric vehicle. magnets such as figure 1 shown. The rotor is sandwiched between two stators, the stator and the rotor are coaxially installed, and an air gap of equal length is left between the two stators and the rotor. The structure of the two stators is exactly the same, and the position is symmetrical about the rotor; each stator is composed of 6 double-tooth U-shaped iron cores, 6 sector-shaped permanent magnets and 6 concentrated armature coils, and the concentrated armature coils are wound on the adjacent On the teeth of two double-toothed U-shaped iron cores, sector-shaped permanent magnets are embedded in the middle of the double-toothed U-shaped iron cores; the permanent magnets on the stator are magnetized alter...

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Abstract

The invention discloses a method for controlling fault tolerance of an axial magnetic field flux-switching permanent motor of an electric vehicle, and aims at enabling the axial magnetic field flux-switching permanent motor to run in a fault tolerance state in case of single-phase breaking; the fault state is determined according to the phase, and the id=0 control strategy is carried out to an axial magnetic field flux-switching permanent motor fault tolerance system to distribute current of a d axis and a q axis during normal operation; in case of fault due to single-phase breaking, id=0 is continuously kept, the fault tolerance is controlled, and the currents of the d axis and the q axis are coordinately distributed, so as to enable the motor to run in the fault tolerance state. With the adoption of the axial magnetic field flux-switching permanent motor fault tolerance system, the motor can be switched from the fault state into the fault tolerance operation state, thus the influence of the fault on the motor operation can be effectively reduced, and as a result, the reliability of a motor driving system is improved.

Description

technical field [0001] The invention belongs to the technical field of electric transmission, and relates to a fault-tolerant control method, in particular to a fault-tolerant control method of an axial magnetic flux switching permanent magnet motor for an electric vehicle. Background technique [0002] With the increasing energy crisis and environmental pollution, electric vehicles have become an inevitable trend for the sustainable development of future vehicles. Electric vehicles not only carry the heavy responsibility of transition to sustainable development, but also shoulder the mission of showing people's passion and image. At present, the motors used in electric vehicles mainly include three-phase asynchronous motors, switched reluctance motors and permanent magnet synchronous motors. Among them, permanent magnet synchronous motors have higher application due to their small size, high power density, high efficiency, and high power factor. Advantage. In recent years...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/08H02P21/00
Inventor 林明耀赵纪龙
Owner SOUTHEAST UNIV
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