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A Method for Improving the Dynamic Performance of the Position Sensorless Control System of Permanent Magnet Synchronous Motor

A permanent magnet synchronous motor, dynamic performance technology, applied in the control system, motor control, vector control system and other directions, can solve the problem of inability to take into account the dynamic performance and steady state performance of the motor, to solve the dynamic performance improvement, reduce the speed error, The effect of improving dynamic performance

Active Publication Date: 2022-02-18
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] Aiming at at least one defect or improvement requirement of the prior art, the present invention provides a method for improving the dynamic performance of a position sensorless control system of a permanent magnet synchronous motor. question

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  • A Method for Improving the Dynamic Performance of the Position Sensorless Control System of Permanent Magnet Synchronous Motor
  • A Method for Improving the Dynamic Performance of the Position Sensorless Control System of Permanent Magnet Synchronous Motor
  • A Method for Improving the Dynamic Performance of the Position Sensorless Control System of Permanent Magnet Synchronous Motor

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[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0032] figure 1 It is a flow diagram of the method for improving the dynamic performance of the permanent magnet synchronous motor position sensorless control system provided by the present invention, see figure 1 , the method includes the following steps:

[0033] S1: Obtain the pre-estimated value of the rotational speed of the permanent magnet synchronous motor in the two-phase stationary c...

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Abstract

The invention discloses a method for improving the dynamic performance of a position sensorless control system of a permanent magnet synchronous motor. Calculate the quantitative relationship between the speed estimation error of the permanent magnet synchronous motor and the change of the q-axis current at the moment of large load dynamic disturbance with the mechanical equation, and convert the quantitative relationship into the differential of the compensation value of the speed error with the q-axis current The rotation speed compensation function of the value change; the pre-estimated value of the rotation speed is compensated according to the rotation speed compensation function, and the final estimated value of the rotation speed is obtained; The contradiction between the improvement of system dynamic performance and the improvement of steady-state performance is of great practical significance for improving the dynamic performance of the position sensorless control system.

Description

technical field [0001] The invention belongs to the technical field of motor control, and more specifically relates to a method for improving the dynamic performance of a position sensorless control system of a permanent magnet synchronous motor. Background technique [0002] Accurate rotor position information is an indispensable part of the permanent magnet synchronous motor vector control system, and is the key to realize the decoupling control of excitation current and torque current. The traditional method relies on the position sensor installed on the shaft end of the motor rotor to obtain the rotor position, which undoubtedly increases the system cost and complexity, and reduces the integration and reliability of the system. In order to further enhance the market competitiveness of the permanent magnet synchronous motor vector control system, the position sensorless control technology has been more and more researched and applied. Among them, in the field of medium a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/24H02P21/18H02P21/13H02P25/022
CPCH02P21/24H02P21/18H02P21/13H02P21/0007H02P25/022H02P2203/09H02P2207/05
Inventor 杨凯姜峰孙宋君柳岸明杨帆
Owner HUAZHONG UNIV OF SCI & TECH
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