Surface-mounted permanent magnet synchronous motor parameter identification method

A permanent magnet synchronous motor and parameter identification technology, which is used in the control of generators, motor generators, AC motors, etc., to solve the problem of observability, ensure accuracy, and occupy less memory.

Pending Publication Date: 2022-04-19
JIANGSU UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The recursive least squares algorithm has a simple structure and is easy to implement, but this algorithm is more suitable for steady unknown parameter systems

Method used

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  • Surface-mounted permanent magnet synchronous motor parameter identification method
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  • Surface-mounted permanent magnet synchronous motor parameter identification method

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Embodiment Construction

[0108] 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.

[0109] Such as figure 1 As shown, the present invention proposes a parameter identification method of a surface-mounted permanent magnet synchronous motor.

[0110] The specific implementation steps of the proposed parameter identification method for surface-mounted permanent magnet synchronous motors include:

[0111] Step 1: Injection of position angle signal

[0112] The voltage equation of the surface-mounted permanent magnet motor in the two-phase rotating coordinate system can be expressed as

[0113]

[0114] Among them, U d and U q is the voltage of the d-q axis, i d and i q is th...

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Abstract

The invention discloses a surface-mounted permanent magnet synchronous motor parameter identification method. According to the method, based on a voltage equation under a two-phase rotating coordinate system, periodic square waves are injected into position angle signals to form two different d-q axis voltage states, and according to the two d-q axis voltage states, the rotating speed, q axis current and the size of the injected position angle signals are combined, a recursive least square method observer is utilized to calculate the position angle of the position angle according to the two d-q axis voltage states. And finally, stator inductance, stator resistance and rotor flux linkage parameters of the motor are identified. According to the method, the problem of parameter observability of the permanent magnet synchronous motor can be effectively solved by injecting the periodic square waves to the position angle signals, the recursive least square method observer has the advantages of being high in convergence speed, small in occupied memory, high in precision and the like, and meanwhile online identification of parameters of the surface-mounted permanent magnet synchronous motor can be achieved.

Description

technical field [0001] The invention belongs to the application field of permanent magnet synchronous motor drive control, and in particular relates to a parameter identification method of a surface-mounted permanent magnet synchronous motor. Background technique [0002] The permanent magnet synchronous motor is a kind of synchronous motor, which consists of two key components: a multi-polarized permanent magnet rotor and a stator with windings. Because of its advantages of high efficiency, large torque, and small size, it plays an important role in the operation control of the industrial automation field. Permanent magnet synchronous motors are divided into two types: surface-mounted permanent magnet synchronous motors and built-in permanent magnet synchronous motors. For surface-mounted permanent magnet synchronous motors, in terms of structure, the difference between the reluctance of the orthogonal and direct axes is very small, and the corresponding The difference in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14H02P25/022H02P21/18G06F17/11G06F17/16
CPCH02P21/14H02P25/02H02P21/18G06F17/11G06F17/16
Inventor 赵文祥陈奕帆邱先群陶涛吉敬华和阳田伟
Owner JIANGSU UNIV
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