SRM torque ripple suppression control system and method based on current injection method
A technology of current injection method and torque ripple, applied in the field of SRM torque ripple suppression control system, can solve problems such as ripple and large torque, and achieve the effect of convenient online control, reducing torque ripple and small calculation amount
Active Publication Date: 2020-12-22
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology
[0003] What the present invention aims to solve is that in the torque control system of the switched reluctance motor of the existing current injection method, the accurate injection current cannot be obtained through online learning, resulting in a large torque ripple, and a SRM based on the current injection method is provided. Torque ripple suppression control system and method
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[0036] 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 combination with specific examples and with reference to the accompanying drawings.
[0037] Switched reluctance motor control system based on traditional current injection method, such as figure 1 As shown, the current negative feedback of the inner loop and the speed closed loop of the outer loop are used to form a double closed-loop control structure. In the outer ring, the rotor position angle θ of the SRM obtained by the position detection module is derived to obtain the actual speed ω 1 , and the actual speed ω 1 with set speed The deviation e' is sent to the PI (proportional-integral) adjustment module for proportional-integral operation, and then the reference torque T is output ref . The torque distribution function (Torque Sharing Function, TSF) of the torque distribution module adjusts the ref...
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The invention discloses an SRM torque ripple suppression control system and method based on a current injection method. The system is mainly composed of a position detection module, a phase current detection module, a derivation module, a rotating speed subtractor, a PI adjustment module, a torque distribution module, a torque current conversion module, a current hysteresis control module, a powerconversion module, a torque detection module, a torque subtractor, a Fourier neural network and three phase current adders. Phase current is compensated for output of the neural network in an injection mode, so that suppression of torque pulsation is achieved through online self-adaptive adjustment of current signal waveforms. The system can form an embedded system, torque ripple information is extracted on the basis of current fluctuation, ideal current under constant torque is indirectly obtained in a compensation current correction mode, the technical method is small in calculation amount,and online control over the switched reluctance motor is facilitated.
Description
technical field [0001] The invention relates to the technical field of switched reluctance motors, in particular to an SRM torque ripple suppression control system and method based on a current injection method. Background technique [0002] Switched reluctance motor (Switched Reluctance Motor, SRM) has received more and more attention in recent years because of its advantages of simple structure, high safety and low manufacturing cost. However, SRM has the problem of large torque ripple during low-speed operation, which limits its further promotion and application in new energy vehicles and other fields. Researchers at home and abroad have done a lot of research on the suppression of SRM torque ripple. The current method is an important control strategy in suppressing torque ripple. By injecting multiple harmonic currents into the conventional reference current, the switch can be suppressed. The purpose of torque ripple in reluctance motors. However, in the existing curre...
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Login to View More IPC IPC(8): H02P25/098H02P21/22
CPCH02P25/098H02P21/22
Inventor 党选举经本钦潘登李晓伍锡如张向文原翰玫黄品高
Owner GUILIN UNIV OF ELECTRONIC TECH