Novel five-phase fault tolerant permanent magnet motor sensorless control method based on specific load

A technology for permanent magnet motors and specific loads, which is applied in the field of sensorless control of new five-phase fault-tolerant permanent magnet motors, and can solve problems such as increased noise and system chattering

Active Publication Date: 2017-01-11
JIANGSU UNIV
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Problems solved by technology

Among them, the sliding mode observer method is widely used. However, because the use of its switching function will cause system chattering problems, the noise in the result will incre

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  • Novel five-phase fault tolerant permanent magnet motor sensorless control method based on specific load
  • Novel five-phase fault tolerant permanent magnet motor sensorless control method based on specific load
  • Novel five-phase fault tolerant permanent magnet motor sensorless control method based on specific load

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Embodiment Construction

[0071] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0072] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0073] Such as figure 1 As shown, a five-phase fault-tolerant permanent magnet motor position sensorless control method based on a novel active disturbance rejection observer of the present invention has two switching states, one is in the speed open-loop current closed-loop state, and the other is in the open-loop current closed-loop st...

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Abstract

The invention discloses a novel five-phase fault tolerant permanent magnet motor sensorless control method based on specific load. A novel back emf observer based on an active disturbance rejection observer is designed on a basis of a load provided by a motor. The state equation of the motor in a static two-phase coordinate system is used as a new control system, and the back emf of the motor is used as control quantity. The active disturbance rejection observer is used to observe a characteristic of alternating current quantity, and the back emf of the motor in the two-phase static coordinate system is observed, and finally, a phase-locked loop observer is used to acquire the rotating speed and the rotor position angle of the motor. By using the novel back emf observer provided by the invention, use of filters is prevented by parameter selection, and the operation bandwidth of the system and the precision of the estimated position angle are improved, and therefore the reliable operation of the five-phase fault tolerant permanent magnet motor sensorless system is realized.

Description

technical field [0001] The invention relates to a novel five-phase fault-tolerant permanent magnet motor sensorless control method based on a specific load, which is suitable for the field of high-precision servo control of permanent magnet motors. Background technique [0002] Due to the advantages of simple structure, high efficiency, and high power density, permanent magnet synchronous motors are increasingly used in aerospace, electric vehicles, and wind power applications. The stable operation of the permanent magnet synchronous motor requires a mechanical encoder to detect the rotor pole position. The detected rotor pole position is passed to the corresponding stator winding to generate a rotating magnetic field. The rotating stator magnetic field interacts with the rotor magnetic field to generate a rotating magnetic field. torque to transmit power to the load. Since the use of mechanical encoders leads to problems such as increased cost, reduced reliability, and inc...

Claims

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Application Information

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IPC IPC(8): H02P21/24H02P21/18
Inventor 刘国海程燃周华伟赵文祥陈前吉敬华黄旭
Owner JIANGSU UNIV
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