Method for acquiring parameters of permanent magnet synchronous motor (PMSM)

A permanent magnet synchronous motor and parameter acquisition technology, which is applied to the control of generators, motor generators, AC motors, etc., can solve the problems of affecting the control effect, inaccurate parameters such as magnetic induction intensity, and inaccurate stator resistance, etc., to achieve Improve the effect of the control effect

Active Publication Date: 2012-03-21
CRRC YONGJI ELECTRIC CO LTD
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Problems solved by technology

[0006] However, the above-mentioned prior art for obtaining various parameters has the following defects: because the constant voltage output by the inverter to the PMSM contains a large number of harmonics, the stator current of the PMSM obtained also has rich harmonic components, so obtaining The stator resistance is not accurate; at the same time, because the constant voltage ou...

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  • Method for acquiring parameters of permanent magnet synchronous motor (PMSM)
  • Method for acquiring parameters of permanent magnet synchronous motor (PMSM)
  • Method for acquiring parameters of permanent magnet synchronous motor (PMSM)

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Embodiment Construction

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0022] figure 1 It is a schematic diagram of the architecture of the PMSM parameter acquisition system based on the embodiment of the present invention. The PMSM parameter acquisition system mainly includes: a microprocessor 11, which can be specifically a digital signal processing unit (Digital Signal Processing; referred to as: DSP), an isolatio...

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Abstract

The invention provides a method for acquiring parameters of a permanent magnet synchronous motor (PMSM), which comprises the following steps: measuring direct-current bus voltage; controlling an inverter to output current to the PMSM by adopting a digital hysteresis loop-type pulse modulation demodulation control mode; detecting line voltage and phase current which correspond to input current in the PMSM; and calculating the stator resistance of the PMSM, the magnetic induction strength psif of a permanent magnet excitation flux linkage and/or the inductance value Ld of the d axis and the inductance value of the q axis according to different current output to the PMSM under controlling the inverter. By adopting the method for acquiring parameters of the PMSM, three parameters in the PMSM are accurately calculated, and the control effect of the vector control technology on the PMSM is effectively improved.

Description

technical field [0001] The invention relates to motor control technology, in particular to a parameter acquisition method of a permanent magnet synchronous motor, which belongs to the field of automatic control. Background technique [0002] With the rapid development of new and high-performance permanent magnet material technology, the advantages of small size, light weight and high efficiency of permanent magnet synchronous motor (Permanent Magnetic Synchronous Motor; PMSM) are becoming more and more prominent, and its application fields are constantly expanding. In the field of high-precision control such as CNC machine tools and robots, permanent magnet synchronous motors are more and more widely used. [0003] At present, in order to meet higher requirements for motor control performance, the industry mostly uses PMSM vector control technology to control the operation of PMSM. This is because: the vector control technology can enable PMSM to obtain good transient respo...

Claims

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Application Information

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IPC IPC(8): H02P21/14H02P27/08
Inventor 陈振锋梁培志宋春龙刘荣强姬春霞
Owner CRRC YONGJI ELECTRIC CO LTD
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