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Torque Control Method of Switched Flux Linkage Permanent Magnet Synchronous Motor Based on Model Prediction

A technology of permanent magnet synchronous motor and switching flux linkage, which is applied in the direction of torque ripple control, motor generator control, AC motor control, etc., and can solve problems that few people have studied

Active Publication Date: 2016-01-13
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, the control methods related to the switched flux linkage permanent magnet synchronous motor have not been studied

Method used

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  • Torque Control Method of Switched Flux Linkage Permanent Magnet Synchronous Motor Based on Model Prediction
  • Torque Control Method of Switched Flux Linkage Permanent Magnet Synchronous Motor Based on Model Prediction
  • Torque Control Method of Switched Flux Linkage Permanent Magnet Synchronous Motor Based on Model Prediction

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0031] The basic mathematical equation for a switched flux linkage permanent magnet synchronous motor is as follows:

[0032] ψ A ψ B ψ ...

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Abstract

The invention discloses a model prediction-based torque control method for a flux-switching permanent magnet synchronous machine. The model prediction-based torque control method comprises the following steps: combining the switch tube states of a motor inverter to obtain eight sets of switch vector signals; at the current moment K, under each set of vector signals of the inverter switch, predicting a p-phase winding current (please see the specification for the formula) at the next moment K+1 to obtain current prediction values (please see the specification for the formula) of a shaft d and a shaft q; predicting motor torque (please see the specification for the formula) and motor flux linkage (please see the specification for the formula) at the next moment k+1; calculating a cost function (please see the specification for the formula) to obtain the vector signal of the inverter switch when the cost function is the smallest; defining m (please see the specification for the formula), controlling the effective acting time of the vector signal of the inverter switch when the cost function is the smallest in a single sampling period according to a value of m to complete torque control of the flux-switching permanent magnet synchronous machine. The method can accurately control change of the vectors of the inverter switch, enables the motor torque fluctuation and the flux linkage fluctuation to be the smallest, and the effective acting time of the inverter switch is adjusted through the duty ratio, so that the on and off frequency of the inverter can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of switched flux linkage permanent magnet synchronous motors, and more specifically relates to a torque control method of switched flux linkage permanent magnet synchronous motors based on model prediction. Background technique [0002] The earliest design idea of ​​switching flux linkage permanent magnet synchronous machine (Flux-SwitchingPermanentMagnetSynchronousMachine, FSPMSM) comes from the research of single-phase double salient pole permanent magnet generator by Rauch et al. Since the performance of the permanent magnet material could not meet the reasonable requirements at that time, the above-mentioned prototype motor had a large body and poor performance indicators, so it did not receive attention at the time. With the development of science and technology, the performance of permanent magnet materials has been greatly improved, which has laid a good foundation for the performance improvement of F...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14H02P21/20H02P27/06H02P6/10
Inventor 徐伟
Owner HUAZHONG UNIV OF SCI & TECH
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