Method and device for predictive fault-tolerant control of multiphase motor models
A multi-phase motor and model prediction technology, applied in motor control, motor generator control, control of electromechanical transmission, etc., can solve the problems of high difficulty and low control efficiency, and achieve the effect of reducing difficulty and improving control efficiency
Active Publication Date: 2022-07-29
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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Problems solved by technology
[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 with reference to the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary, and should not be construed as any limitation to the protection scope of the present invention.
[0064] The following description is presented to enable any person skilled in the art to make and use the invention and to 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 generic principles defined herein may be applied to a wider range of embodiments. Thus, the present invention is not limited to the embodiments set forth 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 s...
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The invention discloses a method and a device for predictive fault-tolerant control of a multi-phase motor model. The method includes: separately acquiring a reference current value and a predicted current value corresponding to each candidate vector; The predicted current value is input into a cost function to obtain the cost function output value corresponding to each candidate vector; the candidate vector with the smallest cost function output value is selected as the optimal vector of the current control cycle and output to the inverter module to control The switching state of the inverter. The invention effectively solves the problems such as rotational speed and torque pulsation which are easy to occur in online switching operation mode before and after the fault. At the same time, in order to ensure the continuity of operation before and after the fault, the present invention constructs a cost function that only includes one weighting factor. After a phase failure occurs, the composition of the cost function does not need to be changed, and only the weighting 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 a device for predictive fault-tolerant control of a multiphase motor model. 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, and high control flexibility. Due to the increase in the number of phases, the vector space of a multi-phase motor is quite complex. 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 of control. After a phase-missing fault occurs, ensuring the smooth operation of multi-phase motors puts forward higher requirements for control system design. To sum up, the control of a multi-phase inverter system is much more complicated ...
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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