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A multi-parameter online identification method for permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and identification method, which is applied in the control of generators, motor control, motor generator control, etc., can solve the problems of increasing system failure rate, expensive mechanical position sensor, heavy machinery, etc., and achieve improved control The effect of precision

Active Publication Date: 2021-05-18
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 systems such as aerospace, due to its own space constraints, the installation of position or speed sensors not only increases the weight and complexity of the system, but also increases the failure rate of the system

Method used

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  • A multi-parameter online identification method for permanent magnet synchronous motor
  • A multi-parameter online identification method for permanent magnet synchronous motor
  • A multi-parameter online identification method for 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

A multi-parameter online identification method for a permanent magnet synchronous motor, comprising the following steps: step 1, establishing a mathematical model of a permanent magnet synchronous motor under a high-frequency voltage signal; step 2, calculating the current and the dq axis inductance of the PMSM under the excitation of a rotating high-frequency voltage signal ; Step 3, calculate the resistance of the PMSM under excitation; Step 4, calculate the flux linkage of the permanent magnet of the PMSM. The invention adopts rotating high-frequency voltage signal injection to identify the dq-axis inductance of the permanent magnet synchronous motor online, uses a square wave current signal to identify the resistance of the permanent magnet synchronous motor online, and uses a model reference self-adaptive method to identify the permanent magnet flux linkage of the permanent magnet synchronous motor online , to realize online multi-parameter identification of the motor, which can be applied to position sensorless control and improve control accuracy.

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 the reliability of the system. 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 co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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