Multi-phase motor model prediction fault-tolerant control method and device
A model prediction and multi-phase motor technology, which is applied in the direction of motor control, motor generator control, and control of electromechanical transmission devices, can solve problems such as high difficulty and low control efficiency, and achieve the effect of reducing difficulty and improving control efficiency
Active Publication Date: 2021-06-04
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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[0006] The technical problem to be solved by the present invention is to provide a method and device for predictive fault-tolerant control of multi-phase motor models in order to overcome the defects of high difficulty and low control efficiency in the prior art of multi-phase motor predictive fault-tolerant control
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[0063] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the drawings and specific embodiments are only exemplary, and should not be construed as limiting the protection scope of the present invention.
[0064] The following description is given to enable a person skilled in the art to make and use the invention and incorporate it into a specific application context. Various modifications, and various uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to a wide range of embodiments. Thus, the present invention is not limited to the embodiments given herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
[0065] In the following detailed description, numerous specific details are set forth in or...
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The invention discloses a multi-phase motor model prediction fault-tolerant control method and device. The method comprises the following steps: respectively acquiring a reference current value and a predicted current value corresponding to each candidate vector; inputting the reference current value and the predicted current value corresponding to each candidate vector into a cost function to obtain a cost function output value corresponding to each candidate vector; selecting the candidate vector with the minimum cost function output value as the optimal vector of the current control period, and outputting the optimal vector to an inverter module to control the on-off state of an inverter. According to the method, the problems of rotation speed and torque pulsation and the like which are easily caused by online operation mode switching before and after a fault are effectively solved. Meanwhile, in order to ensure the continuity of operation before and after the fault, a cost function only containing one weight factor is constructed, and after the open-phase fault occurs, the composition of the cost function does not need to be changed, and only the weight factor needs to be properly adjusted.
Description
technical field [0001] The invention relates to the technical field of motor control, in particular to a method and device for model predictive fault-tolerant control of a multi-phase motor. Background technique [0002] In the field of high-power transmission, compared with traditional three-phase motors, multi-phase motors have the advantages of high power density, excellent fault tolerance performance, and high control flexibility. Due to the increase in the number of phases, the vector space of a multi-phase motor is rather complicated. For example, a two-level six-phase inverter system will have 2^6 (64) output vectors. In addition, the fault-tolerant control of multi-phase motors is not only one of its advantages, but also one of the difficulties in control. After a phase loss fault occurs, ensuring the smooth operation of multi-phase motors puts forward higher requirements for the design of the control system. To sum up, the control of multi-phase inverter system is ...
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IPC IPC(8): H02P29/028H02P21/14
CPCH02P29/028H02P21/14
Inventor 冯凌吕永灿杜凯冰胡亮李程文宇良梅文庆付建国胡仙胡冬
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST