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Design method of lpv speed observer for permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and speed observer, which is applied in the control of generators, motor generators, electromechanical brakes, etc. It can solve the problems of demanding high-frequency signals, increasing design difficulty, and too sensitive motor saliency effect.

Active Publication Date: 2021-08-20
JIANGNAN UNIV
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Problems solved by technology

The advantage of this method is that the speed range is wide, but it is too sensitive to the salient pole effect of the motor, and the requirements for high-frequency signals are too strict, which increases the difficulty of design

Method used

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  • Design method of lpv speed observer for permanent magnet synchronous motor
  • Design method of lpv speed observer for permanent magnet synchronous motor
  • Design method of lpv speed observer for permanent magnet synchronous motor

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Embodiment Construction

[0063] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0064] The LPV (linear parameter varying) method is an effective method for approximately linearizing a nonlinear system. By solving the Lyapunov (Lyapunov) stability condition in a convex set, it can achieve global robust stability when the parameters change. sex.

[0065] The present invention first obtains the LPV mathematical model of the permanent magnet synchronous motor, and based on the Lyapunov stability theory and the linear matrix inequality, obtains the stability condition of the closed-loop system of the motor, and then obtains the LPV state observer feedback gain matrix of the permanent magnet synchronous motor, The LPV state observer is designed to realize the speed tracking control of the motor. Simulation results show that the LPV state observer can quickly and accurately track the speed of the upper motor.

[0066] 1. Mathematical model of p...

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Abstract

The present invention provides a kind of LPV rotating speed observer design method of permanent magnet synchronous motor, at first obtain permanent magnet synchronous motor LPV mathematical model; And based on Lyapunov stability theory and linear matrix inequality, obtain the stability condition of motor closed-loop system, then The LPV state observer feedback gain matrix of the permanent magnet synchronous motor is obtained, and the LPV state observer is designed to realize the speed tracking control of the motor. Simulation results show that the observer can quickly and accurately track the speed of the upper motor.

Description

technical field [0001] The invention relates to a permanent magnet synchronous motor, in particular to a design method for a rotational speed observer of the permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motor (PMSM for short) has the advantages of simple structure, high power density, high efficiency and energy saving, and has good application prospects in industrial manufacturing, national defense, electric vehicles, aerospace, shipbuilding and other fields. A high-performance PMSM speed control system generally needs to obtain accurate motor rotor speed and position information, which can be obtained directly by adding a mechanical sensor, but due to the installation of the sensor, the cost of the motor drive system increases, the reliability decreases, and the volume increases. The scope of use of PMSM is limited, and some special occasions cannot be used, so the position sensorless control method of the motor has attracte...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/13H02P21/14H02P21/18H02P25/022
CPCH02P21/0003H02P21/13H02P21/14H02P21/18
Inventor 吴定会杨德亮张娟纪志成韩欣宏肖仁黄旭黄海波郑洋
Owner JIANGNAN UNIV
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