Multi-parameter online identification method of permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and identification method, which is applied to control generator, motor control, motor generator control, etc., can solve the problems of expensive mechanical position sensor, increase system weight and complexity, and reduce system reliability.

Active Publication Date: 2019-09-03
杭州领芯微电子有限公司
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Problems solved by technology

Although these signals can be accurately detected by mechanical sensors, mechanical position sensors are expensive and mechanically bulky, reducing system reliability
In the field of high-reliability motor drive sy

Method used

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  • Multi-parameter online identification method of permanent magnet synchronous motor
  • Multi-parameter online identification method of permanent magnet synchronous motor
  • Multi-parameter online identification method of permanent magnet synchronous motor

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Embodiment Construction

[0068] The present invention will be further described below in conjunction with the accompanying drawings.

[0069] refer to figure 1 and figure 2 , a permanent magnet synchronous motor multi-parameter online identification method, the method includes the following steps:

[0070] Step 1, establish the mathematical model of the permanent magnet synchronous motor under the high-frequency voltage signal, the process is as follows:

[0071] 1.1 In the dq two-phase synchronous rotating coordinate system, the voltage state equation of the built-in permanent magnet synchronous motor IPMSM is expressed in the form of a matrix as follows

[0072]

[0073] where u d , u q i d and i q Respectively, the stator voltage and current in the synchronous rotating coordinate system, R s is the stator resistance, L d , L q is the d, q axis inductance, ω e is the electrical angular velocity, ψ f is the amplitude of permanent magnet rotor flux linkage;

[0074] 1.2 The frequency o...

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Abstract

The invention relates to a multi-parameter online identification method of a permanent magnet synchronous motor (PMSM). The multi-parameter online identification method comprises the following steps of: the step 1, establishing a permanent magnet synchronous motor mathematical model under a high-frequency voltage signal; the step 2, calculating the current and dq axis inductance of a PMSM under the excitation of the rotating high-frequency voltage signal; the step 3, calculating the resistance of the PMSM under excitation; and the step 4, calculating the permanent magnet flux linkage of the PMSM. According to the method, the dq axis inductance of the permanent magnet synchronous motor is identified on line by injecting a rotating high-frequency voltage signal, the resistance of the permanent magnet synchronous motor is identified on line by adopting a square wave current signal, and the permanent magnet flux linkage of the permanent magnet synchronous motor is identified on line by adopting a model reference self-adaptive method, so that the multi-parameter online identification of the motor is achieved, the method can be applied to sensorless control, and the control precision isimproved.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motor control, and relates to a multi-parameter online identification method for permanent magnet synchronous motors. Background technique [0002] In recent years, with the development of power electronics technology and rare earth materials, permanent magnet synchronous motor (PMSM) has been widely used in industrial automation, aerospace and people's daily life. High-performance permanent magnet synchronous motor speed control system needs rotor position and speed signals to realize speed closed-loop control. Although these signals can be accurately detected by mechanical sensors, mechanical position sensors are expensive and mechanically bulky, reducing system reliability. In the fields of high-reliability motor drive systems such as aerospace, due to their own space constraints, the installation of position or speed sensors not only increases the weight and complexity of...

Claims

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Application Information

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IPC IPC(8): H02P21/14H02P21/24H02P25/022
CPCH02P21/14H02P21/141H02P25/022H02P2207/05H02P21/24
Inventor 吴春赵宇纬孙明轩
Owner 杭州领芯微电子有限公司
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