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Method for constructing multistep predictive controllers for switch reluctance motors

A switched reluctance motor, multi-step prediction technology, applied in motor control, AC motor control, motor vibration suppression control and other directions, can solve problems such as motor operation interference and affecting control accuracy.

Active Publication Date: 2019-02-12
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The harsh working environment may cause greater interference to the operation of the motor and affect the control accuracy, so it has high requirements for the robustness and stability of the control

Method used

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  • Method for constructing multistep predictive controllers for switch reluctance motors
  • Method for constructing multistep predictive controllers for switch reluctance motors
  • Method for constructing multistep predictive controllers for switch reluctance motors

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Embodiment Construction

[0065] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0066] The specific implementation of the present invention is divided into the following four steps. Through the construction of the sampling link, the prediction link, the control link and the error correction link, a multi-step multi-target torque prediction controller block diagram of the switched reluctance motor is formed, as shown in the attached figure 1 .

[0067] Construct a multi-step multi-objective predictive control method for switched reluctance motors, as shown in the attached figure 1 , the system is composed of prediction module, sampling module, control module and error correction module. 1) The function of the sampling module is to collect the current signal i of the motor at time k through the current sensor and the Hall position sensor k and position signal θ k . Input the collected current and position signals to the torque and spee...

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Abstract

The invention discloses a method for constructing multistep predictive controllers for switch reluctance motors. The method includes detecting current signals and position signals at k moments by current sensors and position Hall sensors; carrying out differential computation on the position signals to obtain rotational speed signals; computing difference values of the rotational speed signals andgiven rotational speed signals, converting the difference values into torque reference values and current reference values by PI (proportion and integration) control modules and providing reference values for multistep predictive control on currents and torque; building multistep predictive control models, predicting current values and torque values in prediction time domains by the aid of sampled values at the k moments and acquiring the optimal control variables and switch vectors by means of cost function computation; ultimately establishing error correction modules. The method has the advantages that error correction links are adopted, compensation values are computed by the aid of least recursive square processes, model errors can be compensated, and accordingly the accuracy of models can be improved.

Description

technical field [0001] The invention relates to a construction method of a multi-step predictive controller for a switched reluctance motor, belonging to the technical field of motor control. Background technique [0002] Switched Reluctance Motor (SRM) has outstanding features such as simple structure, high reliability, wide speed range, high starting torque and no need for permanent magnet materials. It is a hot topic for in-wheel motors for hybrid vehicles. The magnetic field of SRM is generated by pulsating current, so the vibration and noise generated by torque pulsation become the more prominent shortcomings of SRM, which seriously limits the promotion and application of switched reluctance motors in the field of hub motors. Therefore, the discussion on reducing vibration and noise has become the focus of extensive attention of scholars at home and abroad. Advanced control methods can reduce torque ripple to a certain extent. [0003] For traditional PID control, whe...

Claims

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Application Information

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IPC IPC(8): H02P25/098H02P23/04H02P23/14H02P23/00
CPCH02P23/0018H02P23/04H02P23/14H02P25/098H02P2207/05
Inventor 陈龙王浩祥孙晓东
Owner JIANGSU UNIV
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