Prediction torque control system and method of three-phase switch reluctance motor

A technology for predicting torque and three-phase switching, which is applied to control systems, torque ripple control, vector control systems, etc., and can solve problems such as high switching frequency and complex hysteresis control rules

Inactive Publication Date: 2017-12-01
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

However, the disadvantage of this method is that the switching frequency is too high and a complex hysteresis control rule needs to be formulated

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  • Prediction torque control system and method of three-phase switch reluctance motor
  • Prediction torque control system and method of three-phase switch reluctance motor
  • Prediction torque control system and method of three-phase switch reluctance motor

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Embodiment Construction

[0091] 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 designed in the various embodiments of the present invention described below can be combined with each other as long as there is no conflict with each other.

[0092] The present invention provides a predictive torque control system with a three-phase switched reluctance motor as the control object. The system block diagram is as follows figure 1 As shown, including: power supply, power converter, signal collector, speed controller and predictive torque controller. The power supply is for the entire system; the input terminal of the speed controller is connected t...

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Abstract

The invention discloses a prediction torque control system and method of a three-phase switch reluctance motor. The system comprises a power supply power source, a power converter, a signal collector, a rotating speed controller and a prediction torque controller. According to the system states (rotating speed, position, current and bus voltage) at the current moment, the corresponding system state at the next moment is predicted on line in a mode of traversing all possible switch vectors of a current sector; the optimum switch vector of a minimum evaluation function is selected to be used as a control signal to be output; a good inhibition effect is achieved on the torque pulsation; the torque inverse characteristic calculation is avoided; and the making of a complicated hysteresis control rule is not needed. A plurality of performance indexes such as torque pulsation, copper loss, power converter switch frequency and the like are comprehensively considered through regulating weight factors in the evaluation function; the system efficiency can be improved; and the switch loss can be reduced, and the service life of a switch tube can be prolonged, so that good flexibility and expansibility are realized.

Description

technical field [0001] The invention relates to a three-phase switched reluctance motor torque control technology, in particular to a three-phase switched reluctance motor predictive torque control system and method. Background technique [0002] Three-phase switched reluctance motor (Switched Reluctance Motor, SRM) has the advantages of simple structure, large starting torque, wide speed range, high reliability and high efficiency. The field has broad application prospects. However, the doubly salient pole structure and the pulse power supply mode of the three-phase switched reluctance motor lead to a large instantaneous torque ripple. Torque ripple will increase motor noise and directly cause speed fluctuations, especially at low speeds, which greatly limits the application of three-phase switched reluctance motors in high-performance applications. [0003] Existing control methods for suppressing torque ripple of three-phase switched reluctance motors can be mainly divi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/10H02P6/17H02P21/18H02P21/20H02P25/098
Inventor 李存贺李岩王国峰赵永生柳健
Owner DALIAN MARITIME UNIVERSITY
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