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Method for estimating armature winding inductance of permanent magnet brushless motor

A permanent magnet brushless motor and armature winding technology, which is used in the control of generators, motor generators, and electromechanical brakes. , unable to improve the structure and other problems, to achieve the effect of optimal design

Inactive Publication Date: 2017-08-18
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many factors affecting the saturation coefficient, which increases the uncertainty of the estimation of the inductance value
The model established with the help of such inductance parameters cannot well reflect the electromagnetic state in the air gap when the motor is running, and the designer cannot propose further improvements to the structure based on valid data

Method used

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  • Method for estimating armature winding inductance of permanent magnet brushless motor
  • Method for estimating armature winding inductance of permanent magnet brushless motor
  • Method for estimating armature winding inductance of permanent magnet brushless motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0036] The armature current ranges from 0A to 10A, excluding 0A, and the step value is 0.5A; the magnetic pole angle ranges from 0° to 360°, and the step value is 15°; when the magnetic pole angle is 360°, It coincides with when the magnetic pole angle is 0°, so 360° is omitted.

[0037] A current of 0.5A is passed into the armature winding. When the magnetic pole angle is 0°, the winding inductance value at this time is calculated to be l 11 , change the magnetic pole position, when the magnetic pole angle is 15°, measure and calculate the winding inductance value at this time l 12 , and so on, calculate the winding inductance value l when the magnetic pole angle is 345° 1,24 .

[0038] Similarly, the armature winding is fed with a current of 1.0A. When the magnetic pole angle is 0°, the winding inductance value at this time is calculated to be l 21 , change the magnetic pole position, when the magnetic pole angle is 15°, measure and calculate the winding inductance value ...

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Abstract

The invention discloses a method for estimating the armature winding inductance of a permanent magnet brushless motor. The method comprises the steps of (1) building a finite element solution model of the motor; (2) performing finite element analysis on the model of the motor; (3) acquiring a parameter table corresponding to the winding inductance, armature current and magnetic pole position; and (4) estimating the inductance in an equivalent simulation manner according to the parameter table. According to the invention, a controller can detect variations in armature current amplitude and magnetic pole angle parameter of the motor in real time, and performs real-time control on the controlled inductance through an instruction; and variations in the inductance can reflect the electromagnetic state inside the motor in real time, so that the electromagnetic state is enabled to be observable. The method can help a designer to estimate the winding inductance more accurately, can be applied to estimation for the current-circulation loss, and plays an important role in optimization design for the structure of the permanent magnet brushless motor.

Description

technical field [0001] The invention relates to a motor, in particular to a method for estimating the inductance value of an armature winding of a permanent magnet brushless motor. Background technique [0002] In the motor structure design and motor debugging stages, the stator winding inductance parameters are very critical for the establishment of the motor model and the characteristic analysis of the motor system. [0003] When the motor is running, the air-gap flux density distribution is uneven, which will make the inductance value of the same winding different at different positions; the size of the armature current will affect the saturation degree of the air-gap flux density, and will also affect the inductance value of the winding. The current calculation method of inductance is to obtain the inductance value in the unsaturated state of the inductance according to the formula, and then estimate the inductance saturation value according to the saturation coefficient...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/16
Inventor 刘凯殷明蒋社稷宿维玉林明耀
Owner SOUTHEAST UNIV
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