A constant power loss model predictive control method for hidden pole hybrid excitation motor

Abstract

The invention disclose a non-salient pole type hybrid excitation motor constant-power loss model prediction control method, and realizes quick and stable operation of a hybrid excitation synchronous motor while constant power loss is maintained. By comparison of given power loss and actual power loss and by combination of a constant power loss control strategy, a d-axis reference current i<dref>,a q-axis reference current i<qref>, and an excitation reference current i<fref> are calculated; and model prediction control is performed based on a voltage prediction model, a reference current and an actual current feedback value, and non-salient pole type hybrid excitation synchronous motor constant-power loss model prediction control is realized finally. By virtue of the control method provided by the invention, the output capability of the motor and an inverter is given into full play; the maximum output torque is improved in a wide speed range, the speed regulation range is expanded, andsystem efficiency is improved; high dynamic response, low torque fluctuation, and high interference resistance and robustness are realized; and in addition, the control method is simple and can be realized easily, and real-time environment application can be facilitated.

Description

technical field [0001] The invention belongs to the technical field of hybrid excitation synchronous motor control, and in particular relates to a constant power loss model predictive control method of a hidden pole type hybrid excitation motor. Background technique [0002] In order to solve the problem that the air gap flux of permanent magnet synchronous motors is difficult to adjust, American scholars proposed the concept of hybrid excitation synchronous motors in the late 1980s. The hybrid excitation synchronous motor has the characteristics of high power / torque density, large starting torque, high torque at low speed, strong overload capacity, and wide speed range. It is suitable as a drive motor for electric drive systems of electric vehicles. The electric drive system of electric vehicles has extremely high requirements on thermal stability, robustness, rapidity and efficiency, so improving the thermal stability, robustness, fast response capability and efficiency of...

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Problems solved by technology

[0004] The purpose of the present invention is to propose a hidden pole hybrid excitation motor constant power loss model predictive control method, which solves the problem of low output capacity of the motor and inverter in the low speed area and large loss in the high speed area existing in the existing hybrid excitation synchronous motor control technology The problem

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