Rotor operation data estimation method, computing device, motor control method and system

Abstract

The invention relates to an estimation method of rotor operation data of a permanent magnet synchronous motor, a computing device, and a motor control method and system. The method comprises the following steps: after a preset high-frequency signal is injected into a stator side of the permanent magnet synchronous motor, obtaining a stator winding current signal of the permanent magnet synchronous motor in the permanent magnet synchronous motor control system; obtaining a q-axis high-frequency current signal under a fundamental wave rotating coordinate system according to the stator winding current signal; after the q-axis high-frequency current signal is demodulated, carrying out low-pass filtering processing, and obtaining rotor angle error information of the permanent magnet synchronous motor; and calculating an estimated rotor angle and an estimated rotor angular speed of the permanent magnet synchronous motor according to the rotor angle error information. The method provided by the embodiment of the invention is rapid and easy to execute and implement, the extraction difficulty of the target signal can be reduced, and relatively reliable rotor operation data can be obtained.

Description

technical field

[0001] The present application relates to the technical field of motor control, and in particular to a method for estimating rotor operating data of a permanent magnet synchronous motor, a computing device, a motor control method and a system. Background technique

[0002] Permanent magnet synchronous motor (PMSM) has the advantages of high power density, high efficiency and good dynamic performance, and has been widely used in aerospace, electric vehicles, industrial sites and other fields. In high-performance AC drive systems, the sensorless control strategy of permanent magnet synchronous motors has become a research hotspot in the field of motor control due to its low cost and high reliability. As one of the position sensorless control strategies for permanent magnet synchronous motors, the high frequency signal injection method can realize the control of the motor at zero speed and low speed. At present, the control strategy of permanent magnet synchron...

Examples

Embodiment Construction

[0056] Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of this application to those skilled in the art.

[0057] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and all possible ...

technical field

[0001] The present application relates to the technical field of motor control, and in particular to a method for estimating rotor operating data of a permanent magnet synchronous motor, a computing device, a motor control method and a system. Background technique

[0002] Permanent magnet synchronous motor (PMSM) has the advantages of high power density, high efficiency and good dynamic performance, and has been widely used in aerospace, electric vehicles, industrial sites and other fields. In high-performance AC drive systems, the sensorless control strategy of permanent magnet synchronous motors has become a research hotspot in the field of motor control due to its low cost and high reliability. As one of the position sensorless control strategies for permanent magnet synchronous motors, the high frequency signal injection method can realize the control of the motor at zero speed and low speed. At present, the control strategy of permanent magnet synchron...

Examples

Embodiment Construction

[0056] Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of this application to those skilled in the art.

[0057] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and all possible ...

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