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Method for measuring parameters of permanent magnet synchronous motor

A permanent magnet synchronous motor and parameter technology, applied in the direction of measuring electrical variables, measuring resistance/reactance/impedance, measuring devices, etc., can solve the problems of less current information obtained, affecting detection accuracy, and fewer sampling points, etc., to achieve the physical concept Clear, high-precision measurement results

Active Publication Date: 2013-04-03
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the voltage amplitude is too small, it will affect the detection accuracy; if it is too large, the current may exceed the limit value of the special device and affect the safety of the special device.
If the action time is too short, the sampling points will be few, and the current information obtained will be less, which will also affect the detection accuracy. If the action time is too long, the current may be too large and affect the safety of special devices.
This makes the method less operable

Method used

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  • Method for measuring parameters of permanent magnet synchronous motor
  • Method for measuring parameters of permanent magnet synchronous motor
  • Method for measuring parameters of permanent magnet synchronous motor

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Embodiment Construction

[0021] The present invention will be described below with reference to the accompanying drawings.

[0022] The device block diagram of the embodiment of the present invention is as figure 1 As shown, the measuring device includes: a three-phase asynchronous motor 2, a permanent magnet synchronous motor 3 and a DSP5, a coupling 4 is provided between the three-phase asynchronous motor 2 and the permanent magnet synchronous motor 3, and a permanent magnet synchronous motor 3 A position sensor 7 is provided between the DSP 5 ; the three-phase asynchronous motor 2 is connected with a three-phase voltage regulator 1 , and the stator three-phase winding 6 of the permanent magnet synchronous motor 3 is also included. The basic parameters of the three-phase asynchronous motor are: rated phase voltage U N =220V, rated phase current I N =11.8A, number of pole pairs p=2, rated speed n N =1500r / min; the basic parameters of permanent magnet synchronous motor are: rated phase voltage U N...

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Abstract

The invention discloses a method for measuring parameters of a permanent magnet synchronous motor and belongs to the field of motor parameter measurement. The method includes utilizing the A phase no-load counter EMF (Electromotive Force) of a motor and the electric angular velocity of the motor to obtain a permanent magnet flux linkage, utilizing the wave form of the A phase no-load counter EMF and a position sensor to read the corresponding electric angular positions of the 90-degree angle and 0-degree angle of a motor rotor, changing the connection type of a stator winding, and utilizing the alternating voltage, current and frequency to respectively obtain corresponding direct-axis inductance and quadrature-axis inductance. The apparatus used in the method are conventional apparatus and the method has the advantages of clear physical concept, easy operation, high measurement accuracy and the like.

Description

technical field [0001] The invention belongs to the field of motor parameter measurement and relates to a method for measuring parameters of a permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous machine (PMSM) does not require excitation current, and has the advantages of simple structure, small size, high efficiency, high power factor, and low moment of inertia. With the improvement of the magnetic properties of permanent magnet materials, permanent magnet synchronous motors have been widely used in special servo devices with small and medium power, high precision, high reliability, and wide speed range. Control methods such as speed sensorless control, field weakening control and loss compensation control are widely used in permanent magnet synchronous drive special devices. The electrical parameters of the motor have a great influence on the control performance of these control strategies. Therefore, it is necessary to accurate...

Claims

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Application Information

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IPC IPC(8): G01R27/26
Inventor 程明张邦富王伟花为
Owner SOUTHEAST UNIV
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