A simplified short-circuit fault-tolerant control method for five-phase permanent magnet motors
A permanent magnet motor, fault-tolerant control technology, applied in the direction of motor control, control system, electrical components, etc., can solve problems such as complex calculation process, and achieve the effect of reducing the amount of calculation
Active Publication Date: 2018-06-26
JIANGSU UNIV
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[0004] At present, the research on fault-tolerant control methods of fault-tolerant permanent magnet motors is mostly focused on open-circuit faults, while there are few fault-tolerant control algorithms for short-circuit faults and the calculation process is complicated, so the present invention proposes a new simple fault-tolerant control method for short-circuit faults , while greatly reducing the complexity of the algorithm, it also ensures the reliability and fault tolerance of the system
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[0049] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.
[0050] Such as figure 1 As shown, this is a five-phase fault-tolerant permanent magnet motor. Its structure includes a coaxial inner stator 3 and an outer rotor 2. A permanent magnet 1, an armature winding 4, and an armature tooth 7 are arranged between the inner stator 3 and the outer rotor 2. Fault-tolerant teeth 5 and modulation poles 6, permanent magnets 1 are fixed on the inner surface of the outer rotor 2 along the circumferential direction, the magnetization direction of the permanent magnets 1 is radial and N poles and S poles are arranged alternately, and the inner stator 3 is arranged on the circumference 10 armature teeth 7 and 10 fault-tolerant teeth 5 interlaced with each other. A single-layer concentrated armature winding 4 is wound on the armature teeth 7, and the concentrated armature windings 4 on two radially oppo...
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The invention discloses a simplified fault tolerance control method for five-phase permanent magnet motor, and the method comprises the following steps: building a five-phase fault tolerance permanent magnet motor model; using non-fault phase current to compensate the torque ripple caused by the short-circuit fault phase current so that the combined torque produced by the non-fault phase and the short-circuit phase is of a constant value; using the non-fault phase compensation current to compensate the normal torque loss caused by circuit fault, and directly adopting an open circuit fault compensation strategy; synthesizing the compensation current vectors to obtain short circuit fault tolerance current; and carrying out simulation analysis. The method of the invention makes one-phase and two-phase short-circuit fault tolerance control of a motor according to the specific situation of the no-load back-electromotive force of the motor, so that to output equivalent torque both in a faulty state or a normal running state, to reduce the torque ripple, and realize the operation of the five-phase fault-tolerance permanent magnet motor in a short-circuit fault.
Description
technical field [0001] The invention relates to a fault-tolerant control method for a short-circuit fault of a motor, in particular to a control method for a five-phase fault-tolerant permanent magnet motor. It is suitable for occasions that have high requirements on the reliability and continuity of the motor, such as aerospace and electric vehicles. Background technique [0002] With the continuous expansion of the application of motor drive systems in various fields such as military and industry, stable and reliable motor drive systems have become especially important for occasions requiring high reliability such as electric vehicles and aircraft. To improve the reliability of the system through fault-tolerant control and reduce or even avoid the loss caused by failure has become the key to ensure the reliability of the system. Therefore, fault-tolerant permanent magnet motors and simple and effective reliability fault-tolerant control methods have received extensive att...
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IPC IPC(8): H02P29/028
Inventor 赵文祥顾陈瑜陈前张步峰朱旭辉胡德水
Owner JIANGSU UNIV