Flux linkage and current combined switched reluctance motor torque ripple suppression method and system

A switched reluctance motor, torque ripple technology, applied in control systems, control generators, vector control systems, etc., can solve problems such as difficulty in achieving desired accuracy, excessive output torque ripple, and difficult SRM flux linkage model.

Active Publication Date: 2017-10-24
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

[0005] In short, the strong nonlinearity of the SRM flux linkage makes it difficult to obtain the model accurately. The traditional torque distribution control linearizes the nonlinear problem, resulting in excessive output torque ripple. Adjustment, it is difficult to achieve the desired accuracy, it is necessary to design a new method of suppressing the torque ripple of the switched reluctance motor

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  • Flux linkage and current combined switched reluctance motor torque ripple suppression method and system
  • Flux linkage and current combined switched reluctance motor torque ripple suppression method and system
  • Flux linkage and current combined switched reluctance motor torque ripple suppression method and system

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Embodiment Construction

[0113] This embodiment of the torque ripple system for combined flux linkage and current suppression of switched reluctance motors, the flow chart is as follows figure 1 Shown, the given torque T d Feedback torque T is obtained from the measured current I and the position angle θ by looking up the table e Perform torque deviation calculation, and the obtained torque deviation △T is used as the input signal of current incremental PID control and flux linkage incremental PID control after introducing fal function for nonlinear preprocessing; current incremental PID control and flux linkage incremental The Jacobian information involved in the parameters of PID control and Jacobi information respectively by the current deviation △i d (k-1), T e and T e-1 The current dual-weighted neural network provides as input signal and current bias T e and T e-1 As input signals are provided as input to the flux-linkage dual-weight neural network.

[0114] The reference flux linkag...

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Abstract

The invention provides a flux linkage and current combined switched reluctance motor torque ripple suppression method and system. A reference flux linkage is obtained through flux linkage increment PID control of a flux linkage double-weight neural network based on deviation preprocessing, and reference current is obtained through current increment PID control of a current double-weight neural network based on deviation preprocessing; and three-phase reference current and flux linkage are obtained through flux linkage distribution and current distribution and cooperatively inputted to a two-dimensional hysteresis controller so as to obtain effective switching quantity under the constant torque. The signal processor of the system includes all the related operation modules and current and flux linkage distribution modules and the two-dimensional hysteresis controller. The signal processor receives current and position sensor signals, the switching quantity of the two-dimensional hysteresis controller is obtained through operation of all the modules and a power driver is controlled to drive the SRM to operate. The output current is converged to the reference current, and the output flux linkage is converged to the reference flux linkage so that effective control of the total torque ripple of the switched reluctance motor can be realized.

Description

technical field [0001] The invention relates to the technical field of control of switched reluctance motors for driving new energy vehicles, in particular to a method and system for jointly suppressing torque ripple of switched reluctance motors by flux linkage and current. Background technique [0002] SRM (Switched Reluctance Motor, SRM) is a doubly salient motor, the stator has concentrated windings, the rotor has neither windings nor permanent magnets, its motion is generated by the change of reluctance in the air gap between the stator and rotor, and has a structure It has many advantages such as firmness, high electromechanical energy conversion efficiency, wide speed range, and low cost. However, its double salient pole structure, switching power supply mode and other factors make its torque ripple problem particularly prominent, which limits its application and promotion in fields with high vibration and noise problems. Therefore, the suppression of torque ripple of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/22H02P21/08H02P25/098H02P27/04
CPCH02P21/0014H02P21/08H02P21/22H02P25/098H02P27/04H02P2205/01
Inventor 党选举李珊党超王土央伍锡如张向文白雁力陈振华周云生张潇苗茂宇
Owner GUILIN UNIV OF ELECTRONIC TECH
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