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Fault tolerance control method based on asymmetric double three-phase permanent magnet synchronous motor

A dual-phase permanent magnet, synchronous motor technology, used in motor generator control, AC motor control, electronic commutation motor control, etc., can solve problems such as lack of versatility

Active Publication Date: 2015-12-02
ZHEJIANG UNIV
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Problems solved by technology

[0004] The object of the present invention is to provide a kind of fault-tolerant control method based on the unified model of asymmetrical double-three-phase permanent magnet synchronous motor (DTP-PMSM) for the existing fault-tolerant control method of double-three-phase permanent-magnet synchronous motor (DTP-PMSM).

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  • Fault tolerance control method based on asymmetric double three-phase permanent magnet synchronous motor

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Embodiment Construction

[0047] The purpose and effects of the present invention will become more apparent by referring to the accompanying drawings in detail of the present invention.

[0048] figure 1 It is a structural diagram of a dual three-phase permanent magnet synchronous motor. From the distribution of the stator winding, it can be seen that the stator winding is composed of two sets of conventional three-phase windings ABC and DEF, each set of windings is Y-connected, and the corresponding internal windings are 120° apart from each other in space, while the two sets of three-phase The angle between the corresponding phases of the windings is 30°. Therefore, in terms of hardware circuit design, the dual-three-phase permanent magnet synchronous motor is a six-phase system. In order to make the stator flux linkage and permanent magnet flux interaction generate constant electromagnetic torque, the phase winding current in each Y-shaped winding The phase difference is 120°, and the correspondin...

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Abstract

The invention discloses a fault tolerance control method based on an asymmetric double three-phase permanent magnet synchronous motor uniform model. The objects of the invention are to establish an asymmetric double three-phase permanent magnet synchronous motor uniform model, to realize the decoupling control of the asymmetric double three-phase permanent magnet synchronous motor based on the uniform model and to improve the redundancy of the system. Aiming for asymmetry of the double three-phase permanent magnet synchronous motor under various faulted conditions and the condition that traditional coordinate transformation cannot realize decoupling control, the fault tolerance control method comprises steps of establishing a double three-phase permanent magnet synchronous motor uniform model under various faulted conditions, analyzing a coupling relation of a voltage equation in a d-q subplane, putting forward two times of rotation transformation to realize the decoupling of the d-q subplane, and putting forward the fault tolerance control method having minimum stator copper consumption or minimum stator current. The invention can effectively reduce the electromagnetic torque pulsation when the double-three-phase permanent magnet synchronous motor is in phase-deficient operation, and can realize the magnetic field directive decoupling control in the phase-deficient operation.

Description

technical field [0001] The invention belongs to the field of motor control and relates to a fault-tolerant control method based on a unified model of an asymmetric double-three-phase permanent magnet synchronous motor. Background technique [0002] With the development of power electronics technology and control theory, the advantages of multi-phase motor frequency conversion speed regulation system have been fully utilized. Compared with the traditional three-phase motor system, the multi-phase motor frequency conversion speed regulation system can use low-voltage devices to achieve high-power drive, and has better fault tolerance while reducing torque ripple. Its outstanding features can well meet the special requirements of high-power electric drive systems, such as electric vehicles, aerospace and nuclear power plant cooling systems. Double-three-phase permanent magnet synchronous motor is an important branch of multi-phase motor system, which combines the advantages of...

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Application Information

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IPC IPC(8): H02P21/00H02P25/02H02P25/16
Inventor 章玮陈伯建
Owner ZHEJIANG UNIV
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