A Positionless Predictive Control Method for Switched Reluctance Hub Motor

Abstract

The invention discloses a position-free predictive control method for a switched reluctance hub motor, which belongs to the technical field of motor control. First collect the current i of the compound object at time k k and voltage signal V k , and input the position observer, the position observer estimates the position signal θ k and speed signal ω k , put θ k and i k Input to the MPC controller, the MPC controller according to the given reference current value i ref , through calculation, let the predicted current value i at the next moment k+1 Accurately track the reference current, the output is the duty cycle u k , which is used to adjust the conduction time of the switching tube of the power converter in the composite object, and adopts an iterative learning controller that does not need to identify the system parameters, and the collected speed signal ω k Input the iterative learning controller, and give the reference speed ω ref , through which the given reference current i required by the MPC controller is obtained ref . The invention reduces the torque ripple, improves the robustness, accuracy and reliability of the system, and realizes high-efficiency and high-accuracy parameter selection.

Description

technical field [0001] The invention relates to a positionless predictive control method for a switched reluctance hub motor, belonging to the technical field of motor control. Background technique [0002] In the field of automobile research, in order to solve the problems of limited oil resources and increasing air pollution, electric vehicles have become a research field that has attracted much attention, and it has also become a very important strategic research industry in my country. The hub motor drive removes the mechanical transmission structure, and the drive motor is directly connected to the wheel in the mechanical structure. This structure can directly drive the wheel to rotate and greatly simplifies the mechanical structure of the vehicle. The transmission efficiency of the car is improved and increased. available space. [0003] The structure of the switched reluctance motor is simple and stable, and the manufacturing cost is low. Both the stator and rotor a...

AI Technical Summary

Problems solved by technology

However, the energization area of ​​each phase of the motor is not limited, and each phase will generate a large negative torque during operation, resulting in a decrease in the efficiency of the motor; the name "Permanent Magnet Synchronous Motor Model Predictive Control Method", application number: "201610197283.2", the invention It can suppress the torque ripple of the motor and maintain the efficiency of the motor. Compared with the direct torque control, it is more advanced, but the model predictive control of the switched reluctance motor is currently less used

Name "a switched reluctance motor without a rotor position sensor", application number: "201410851317.6", this invention estimates the position signal by detecting the induced potential, but it needs to add coils and other devices, which is relatively complicated, so it needs to be studied A simple way to estimate position

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