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Improved surface-mounted permanent magnet synchronous motor number online identification method and device

A permanent magnet synchronous motor and identification method technology, which is applied in the direction of control of electromechanical transmission, control of generators, motor generator control, etc., can solve the problems of inductance value fluctuations and low identification accuracy, so as to improve identification accuracy and reduce identification Effect of Range of Result Swing

Pending Publication Date: 2022-07-01
CHINA UNIV OF MINING & TECH
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Problems solved by technology

However, the traditional least squares method is based on the steady-state voltage equation of the permanent magnet synchronous motor for identification, and the derivative term of the current will be ignored, resulting in the problem of low identification accuracy.
And when the step-by-step identification strategy is adopted, the identified inductance value often has large fluctuations

Method used

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  • Improved surface-mounted permanent magnet synchronous motor number online identification method and device
  • Improved surface-mounted permanent magnet synchronous motor number online identification method and device
  • Improved surface-mounted permanent magnet synchronous motor number online identification method and device

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Embodiment Construction

[0047] The following description and drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them.

[0048] It should be understood that the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0049] The optional embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0050] like figure 1 As shown, the disclosed embodiments of the present invention provide an improved method for on-line identification of the number of surface mount permanent magnet synchronous motors. The method specifically includes the following method steps:

[0051] S100: Collect and store parameter variable values ​​in the dq coordinate...

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Abstract

The invention discloses an improved surface-mounted permanent magnet synchronous motor number online identification method and device, and the method comprises the steps: carrying out the deformation of a dynamic voltage equation of a surface-mounted permanent magnet synchronous motor, and collecting voltage and current signals and the angular speed of the motor under a dq coordinate system; voltage errors caused by nonlinear factors of the inverter are calculated, and the collected dq-axis voltage signals are compensated; compared with a traditional least square method identification algorithm based on a steady-state voltage equation, the method has the advantages that the method is established on the basis of a deformed dynamic voltage equation, a traditional step-by-step identification strategy is improved, voltage error compensation is carried out, and the accuracy of step-by-step identification is improved. Therefore, the method has higher identification accuracy.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motor control, and in particular relates to an improved method and device for on-line identification of surface-mounted permanent magnet synchronous motor numbers. Background technique [0002] With the advancement of science and technology, surface-mounted permanent magnet synchronous motors are more and more widely used in industrial occasions, and people have higher and higher requirements for its high-performance control technology. For this reason, many advanced control strategies have been proposed, but most advanced control strategies are often based on precise motor parameters, such as maximum torque-to-current ratio control, model predictive control, and speed sensorless control. However, the parameters of the surface-mounted permanent magnet synchronous motor (stator resistance, inductance, rotor flux linkage) will be changed by factors such as temperature and stator...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14
CPCH02P21/14
Inventor 张辉王剑郭涛王亭杰徐晓明
Owner CHINA UNIV OF MINING & TECH
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