A short-circuit fault-tolerant control method for a five-phase fault-tolerant permanent magnet motor
A permanent magnet motor and fault-tolerant control technology, which is applied in the direction of motor generator control, electronic commutation motor control, control system, etc., can solve the problems of five-phase fault-tolerant permanent magnet motor control, etc., and achieve operation with short-circuit faults, reduce Effect of Small Torque Ripple
Active Publication Date: 2017-09-05
JIANGSU UNIV
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Problems solved by technology
[0005] The purpose of the present invention is to solve the control problem of the existing five-phase fault-tolerant permanent magnet motor during short-circuit fault operation
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[0039] The specific embodiments of the present invention will be further described below in conjunction with the drawings.
[0040] Such as figure 1 As shown, this is a five-to-compatibility permanent magnet motor, and its structure includes a coaxial inner stator 3 and an outer rotor 2. A permanent magnet 1, an armature winding 4, and armature teeth 7 are arranged between the inner stator 3 and the outer rotor 2. Fault-tolerant teeth 5 and modulating poles 6, permanent magnets 1 are fixedly attached to the inner surface of the outer rotor 2 along the circumferential direction, the magnetizing direction of the permanent magnets 1 is radial and the N poles and S poles are alternately arranged, and the inner stator 3 is arranged on the circumference 10 armature teeth 7 and 10 fault-tolerant teeth 5 are interleaved with each other. A single-layer concentrated armature winding 4 is wound on the armature teeth 7, and the concentrated armature windings 4 on the two armature teeth 7 are ...
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The invention discloses a short-circuit fault-tolerant control method of a five-phase fault-tolerant permanent magnet motor, which comprises the following steps: establishing a five-phase fault-tolerant permanent magnet motor model; using the non-fault phase current to compensate for the lack of normal torque of the short-circuit fault phase, and directly using the open-circuit fault Compensation strategy; compensate the pulsating magnetomotive force caused by the short-circuit fault phase current with the non-failure phase current, so that the synthetic magnetomotive force is zero, and eliminate the torque ripple caused by the short-circuit current; the compensation current vector synthesis of the steps 2-3, Get short-circuit fault tolerance current; carry out Maxwell short-circuit fault tolerance control simulation. According to the specific situation of the no-load back electromotive force of the motor, the present invention performs one-phase short-circuit fault-tolerant control on the motor, so that the fault is equivalent to the output torque in the normal operation state, reduces the torque ripple, and realizes the five-phase fault-tolerant permanent magnet motor with short-circuit fault run.
Description
Technical field [0001] The invention relates to a fault-tolerant control method of a motor short-circuit fault, in particular to a control method of a five-tolerant fault permanent magnet motor. It is suitable for aerospace, electric vehicles and other occasions that have high requirements on the reliability and continuity of the motor. Background technique [0002] With the continuous expansion of motor drive systems in military, industrial and other fields, stable and reliable motor drive systems are particularly important for some occasions with high reliability requirements such as aircraft and electric vehicles. Reaching system requirements through fault-tolerant control, improving system reliability, and reducing or avoiding losses due to faults has become the key to ensuring system reliability. Therefore, fault-tolerant permanent magnet motors and highly reliable fault-tolerant control methods have received extensive attention. [0003] Scholars at home and abroad have mad...
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IPC IPC(8): H02P21/00H02P21/22
Inventor 赵文祥张步峰吉敬华唐建勋刘国海朱纪洪
Owner JIANGSU UNIV