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Coupling control method for multi-phase permanent error tolerance motor

A permanent magnet fault-tolerant, decoupling control technology, applied in the direction of motor generator control, electronic commutation motor control, control system, etc., can solve problems that do not involve decoupling control methods, etc., achieve small overshoot, fast response, The effect of high control precision

Inactive Publication Date: 2008-01-16
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the design of the body structure of the permanent magnet fault-tolerant motor studied in the present invention, foreign countries have conducted research and disclosed a prototype of the principle, but have not involved the decoupling control method of the motor with this structure

Method used

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  • Coupling control method for multi-phase permanent error tolerance motor
  • Coupling control method for multi-phase permanent error tolerance motor
  • Coupling control method for multi-phase permanent error tolerance motor

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Embodiment Construction

[0014] The present invention is described by taking a six-phase 8-pole permanent magnet fault-tolerant motor as an example. The implementation methods and steps of permanent magnet fault-tolerant motors with structures such as six-phase 10-pole, five-phase 8-pole, and four-phase 4-pole are the same as those in this embodiment.

[0015] Referring to Figure 1, the rotor of a multi-phase permanent magnet synchronous motor with fault tolerance is inlaid with rare earth permanent magnets, and can adopt radial or tangential structures. The stator structure is that each phase winding is wound on one armature tooth, and each slot has only one phase winding, and the armature tooth without winding acts as a magnetic flux circuit to play the role of thermal isolation and electrical isolation between phases. The ends of the motor windings of this structure are physically isolated because they do not overlap, thereby avoiding the serious failure of phase-to-phase short circuit. When a shor...

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Abstract

The invention discloses a decoupling control method for multiple-phase permanent magnet fault tolerant motor. The invention is characterized in that: (a) create the mathematical model of permanent magnet fault tolerant motor under multiple-phase still reference frame and deduce transformation matrix from multiple-phase still reference frame to two-phase rotating reference frame; (b) control d-axis (id=0) of stator current under two-phase rotating reference frame and independently control electromagnetic torque Td control of cross-axis (iq) of stator current to realize decoupling control of the current, the flux linkage, and the torque of multiple-phase permanent magnet fault tolerant motor. The transformation matrix of decoupling of stator flux linkage and rotor position angle theta is determined by Space Vector transform to realize decoupling control of flux linkage for multiple-phase permanent magnet fault tolerant motor. The control method provides permanent magnet fault tolerant motor with small overshoot, high control precision, and high response speed. The electromagnetic torque can get stable in 1S-2S during load fluctuation. The motor can give good dynamic and static performance.

Description

technical field [0001] The invention relates to a decoupling control method for a multi-phase permanent magnet fault-tolerant motor. Background technique [0002] In some fields of electrical actuation that require high system reliability, such as: rudder control, fuel, brakes, environmental control, etc. of a new generation of aircraft, which are closely related to flight safety and flight performance and electric drive systems; Cooling water pump system; ship drive system; drive system of electric vehicles; drive system of satellite antenna, etc., their common feature is that they have very high requirements for system reliability and fault tolerance. High-performance control method is one of its key technologies. [0003] At present, although there are many researches in this area at home and abroad, there is still no effective decoupling control method for permanent magnet fault-tolerant motors. For the design of the fault-tolerant structure of the motor, multi-phase o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/14
Inventor 齐蓉林辉陈峥
Owner NORTHWESTERN POLYTECHNICAL UNIV
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