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Permanent magnet synchronous motor sensorless control method, system and device for eliminating observation value fluctuation error

A permanent magnet synchronous motor and control system technology, applied in the direction of motor generator control, control system, vector control system, etc., can solve the problem of deteriorating the control performance of the sensorless permanent magnet synchronous motor, affecting the dynamic performance of the system, and the fluctuation error of the estimated value and other problems, to achieve the effect of simple structure, improved system control performance, and reduced impact

Pending Publication Date: 2022-04-15
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Application Information

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Problems solved by technology

[0005] However, in practical applications, the filters used by these traditional methods will cause phase lag, which will affect the system dynamic performance
The existence of the fluctuation error of the estimated value deteriorates the control performance of the position sensorless permanent magnet synchronous motor

Method used

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  • Permanent magnet synchronous motor sensorless control method, system and device for eliminating observation value fluctuation error
  • Permanent magnet synchronous motor sensorless control method, system and device for eliminating observation value fluctuation error
  • Permanent magnet synchronous motor sensorless control method, system and device for eliminating observation value fluctuation error

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0044] figure 1 Based on the principle block diagram of the traditional sliding mode observer position sensorless vector control system, the present invention discloses a permanent magnet synchronous motor position sensorless control system and its control method and device to eliminate the fluctuation error of the observed value, see figure 2 , figure 2 It is a structural block diagram of the position sensorless vector control system of the built-in permanent magnet synchronous motor of the present invention.

[0045] The permanent magnet synchronous motor position sensorless control system that eliminates the fluctuation error of the observed value includes a permanent magnet synchronous m...

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Abstract

The invention relates to the field of motor control, and discloses a permanent magnet synchronous motor sensorless control method, system and device for eliminating observation value fluctuation errors, the system obtains equivalent counter electromotive force information through a sliding mode observer, then adopts a counter electromotive force fundamental wave construction method, and outputs an equivalent counter electromotive force fundamental wave observation value by using a fundamental wave reconstruction module; and eliminating a harmonic component in the counter electromotive force to obtain a counter electromotive force fundamental wave, and finally obtaining the rotor position and rotating speed estimation value of the motor through an orthogonal phase-locked loop, thereby improving the rotor position and rotating speed precision, and keeping better dynamic performance of the system. Compared with the prior art, the method adopts a counter electromotive force fundamental wave reconstruction method, eliminates the harmonic component of a counter electromotive force observation value, and uses the counter electromotive force observation value to estimate the rotor position and rotation speed, thereby greatly improving the observation precision of the rotor position and rotation speed, and maintaining the good dynamic performance of the system.

Description

technical field [0001] The invention belongs to the field of motor control, and in particular relates to a position sensorless control method, system and device for a permanent magnet synchronous motor that eliminates fluctuation errors in observation values, and is particularly suitable for applications in high-speed position sensorless control of permanent magnet synchronous motors. Background technique [0002] Vehicle drive motor is one of the key executive components of hybrid electric vehicles and electric vehicles, and its driving performance directly affects the vehicle performance of hybrid electric vehicles and electric vehicles. At present, the driving motors for vehicles mainly adopt permanent magnet synchronous motors, which have the advantages of high power density, high efficiency, and low operating noise. In order to realize the high-performance control of permanent magnet synchronous motors, the detection of motor rotor position and speed information is esse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/18H02P21/24H02P21/00H02P21/13H02P25/022
Inventor 鲁庆高帅郑世佼陆舜武莎莎张涛莫丽红叶小婷陈万
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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