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Method for measuring parameters of direct-current brushless motor

A DC brushless motor, DC motor technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of multiple equipment, complicated process, large manpower and material resources, etc., and achieve small size, simple measurement, and easy access Effect

Active Publication Date: 2013-04-17
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although conventional motor testing methods and motor testing equipment can be used to measure the parameters of brushless DC motors, traditional methods require more equipment, the process is more complicated, and it consumes more manpower and material resources.

Method used

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  • Method for measuring parameters of direct-current brushless motor
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  • Method for measuring parameters of direct-current brushless motor

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Embodiment Construction

[0043] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0044] (1) Measure the phase resistance of the brushless DC motor

[0045] The phase resistance of the brushless DC motor under test can be measured directly by simple voltammetry. It should be noted that if the phase resistance of the motor under test is greater than 200 ohms, use figure 1 The wiring method on the left; on the contrary, if the phase resistance of the motor under test is less than 200 ohms, use figure 1 Wiring on the right.

[0046] The phase resistance r of the tested brushless...

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Abstract

The invention provides a method for measuring parameters of a direct-current brushless motor, which can simply measure phase resistance of the direct-current brushless motor by using a voltammetry, and can respectively calculate rotational inertia and friction torque coefficient of a system, namely rotational inertia and friction torque coefficient of the direct-current brushless motor to be detected by utilizing the simplicity and operability in the direct-current motor parameter measurement, when a direct-current motor drags the direct-current brushless motor to be detected and when the direct-current motor is individually operated. A direct-current motor 2 with suitable power, which is used as a dragged motor, is connected with a motor to be detected 4 through a torque transducer 3, so as to supply power to the direct-current brushless motor to be detected 4; the direct-current brushless motor to be detected 4 drags the direct-current motor 2; and the dragged direct-current motor is connected in series with a slide rheostat with a reasonable resistance value in a three-phase manner. The direct-current brushless motor 4 rotates at a constant rotation speed; the resistance value of the slide rheostat can be adjusted; the rotation speed is recorded, and a read number of the torque is touched; and a reasonable rotation speed-torque curve of the motor to be detected 4 can be obtained after the operation is carried out for multiple times within a reasonable rotation speed and torque range.

Description

technical field [0001] The invention relates to a motor testing method, in particular to a method for measuring parameters of a DC brushless motor. Background technique [0002] The brushless DC motor consists of a motor body and a driver, and is a typical mechatronic product integrating a brushless motor, driver, sensor, controller, and microprocessor. [0003] The DC brushless motor has the same working principle and application characteristics as the general DC motor, but its composition is different. In addition to the motor itself, the former also has a commutation circuit, and the motor itself and the commutation circuit are closely integrated. The commutation circuit replaces the physical commutation structure of the carbon brush and slip ring structure, and the electronic commutation is realized through the control circuit. [0004] Compared with ordinary DC motors, brushless DC motors have all the advantages of traditional DC motors, and at the same time cancel th...

Claims

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Application Information

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IPC IPC(8): G01R31/34
CPCG01R31/343
Inventor 张波刘品宽奚静思李玉洁
Owner SHANGHAI JIAO TONG UNIV
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