Position sensor-free control system and method for hybrid electric vehicle switch reluctance BSG

A technology of hybrid electric vehicles and switched reluctance, which is applied in control systems, vector control systems, motor control, etc., to achieve the effects of reducing noise, improving safety performance, and improving stability

Active Publication Date: 2018-09-28
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to propose a high-performance sensorless control system and its control method in order to accurately determine the position of the switched reluctance BSG rotor used in hybrid vehicles

Method used

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  • Position sensor-free control system and method for hybrid electric vehicle switch reluctance BSG
  • Position sensor-free control system and method for hybrid electric vehicle switch reluctance BSG
  • Position sensor-free control system and method for hybrid electric vehicle switch reluctance BSG

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Embodiment Construction

[0027] Such as figure 1 As shown, the switch reluctance BSG position sensorless control system of the hybrid electric vehicle of the present invention is composed of a control module, a power conversion module, a signal measurement module, a noise removal module, a prediction module and a rotation speed measurement module.

[0028] Use the speed measurement module to measure the instantaneous speed n of the BSG, and compare the instantaneous speed n with the reference speed n ref The speed error Δe is obtained by comparison, the speed error Δe is input to the control module, and the output of the control module is a voltage signal V, the output terminal of the control module is connected to the input terminal of the power conversion module, and the voltage signal V is input to the power conversion module, and the power conversion module The output is the final control voltage V s , the output terminals of the power conversion module are respectively connected to the BSG and t...

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Abstract

The invention discloses a position sensor-free control system and method for a hybrid electric vehicle switch reluctance BSG. The method comprises the following steps: equally dividing data of phase current i1, a rotor angle theta(t) and a flux linkage phi(t) into forecast sample data and training sample data, and taking training samples as input samples of a least squares support vector machine,thus obtaining a least squares support vector machine forecast model; optimizing a normalization parameter gamma in the model and the width sigma of a radial basis function by adopting an ant colony algorithm, thus obtaining a final model; and processing instant current is0 of the BSG through a denoising module to output current ist and a flux linkage phi(st), and substituting the current ist andthe flux linkage phi(st) into the final model to obtain a forecast position angle theta(st) to implement position sensor-free rotating speed control over the BSG. The aim of position-free control is fulfilled by adopting finite element analysis and an ant colony least square support vector machine-based method, and the control stability is improved.

Description

technical field [0001] The invention relates to a belt drive starter generator (hereinafter referred to as BSG) system for a hybrid vehicle, specifically a position sensorless control system and method for the BSG system, which is suitable for high-performance control of the BSG system and belongs to the BSG hybrid system. control field. Background technique [0002] Hybrid vehicles have the advantages of energy saving and emission. BSG is a hybrid technology with idling stop and start functions. It adopts belt drive mode for power mixing, which can reduce fuel consumption and emissions when the vehicle is idling. When the car is running normally, the BSG works on the same principle as the traditional generator, which is driven by the engine to generate electricity to charge the battery; when the car is parked, the BSG can stop the engine; when the car starts again, the BSG system quickly starts the engine to eliminate The fuel consumption, emission and noise of the engine...

Claims

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Application Information

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IPC IPC(8): H02P21/18H02P21/26H02P21/00H02P25/089
CPCH02P21/0017H02P21/18H02P21/26H02P25/089H02P2203/03
Inventor 孙晓东金志佳陈龙苏伯凯杨泽斌李可
Owner JIANGSU UNIV
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