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Test device and test method of back electromotive force of brushless motor

A technology of brushless motor and counter electromotive force, which is applied in the direction of motor generator testing, measuring device, measuring current/voltage, etc. It can solve the problems of interfering data reading and inability to obtain test data, so as to eliminate electromagnetic interference, facilitate promotion, The effect of easy operation

Inactive Publication Date: 2017-08-04
GOERTEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, because the speed of the external drive motor is constant, the speed of the motor under test is also constant, so when the oscilloscope reads, the waveform is relatively consistent, but because an external electromagnetic field is applied at this time, the oscilloscope is interfered by the external electromagnetic field during the test. There are many glitches affecting the measurement in the waveform diagram, which interfere with the reading of the data, and it is also impossible to obtain accurate test data; Figure 5 The waveform shown in
[0007] In summary, according to the existing test methods, there is still a lack of a convenient and highly accurate test device and test method for measuring the back EMF of the motor

Method used

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  • Test device and test method of back electromotive force of brushless motor
  • Test device and test method of back electromotive force of brushless motor
  • Test device and test method of back electromotive force of brushless motor

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Embodiment 1

[0041] Such as figure 1 , figure 2 with image 3 As shown, a testing device for back EMF of a brushless motor includes a base 11 on which two mounting seats are provided. One of the mounting seats 12 is equipped with a brushless motor 14 to be tested, and the other mounting seat 13 is equipped with Drive mechanism, the drive mechanism is a drive mechanism that does not generate electromagnetic interference. In addition, the output shaft of the driving mechanism is connected with the output shaft of the brushless motor 14 to be tested through a shaft connector, and the driving mechanism is also connected with the power component.

[0042] In the test device of the present invention, the output shaft of the driving mechanism rotates under the action of the power component. Under the action of the shaft connector, the output shaft of the driving mechanism drives the output shaft of the brushless motor 14 mounted on the mounting seat to be rotated together, so that the coil on the ...

Embodiment 2

[0050] This embodiment is the method when the testing device for back electromotive force of the brushless motor of the first embodiment is used.

[0051] Such as figure 1 with Image 6 As shown, a method for testing back EMF of a brushless motor includes the following steps:

[0052] The brushless motor 14 to be tested is installed on the above-mentioned testing device for back electromotive force of the brushless motor 14, and the output shaft of the brushless motor 14 to be tested is connected to the output shaft of the driving mechanism through a shaft connector.

[0053] The power component provides power for the driving mechanism to rotate its output shaft, which drives the brushless motor 14 to be tested to rotate.

[0054] After the brushless motor 14 to be tested rotates, a back electromotive force is generated on the coil;

[0055] The oscilloscope connects the back electromotive force generated on the coil to obtain the waveform diagram of the back electromotive force of the...

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Abstract

The invention discloses a test device of the back electromotive force of a brushless motor. The test device comprises a base and two installation seats arranged on the base, one installation seat is used for installing a to-be-tested brushless motor, the other installation seat is used for installing a driving mechanism, the driving mechanism is a driving mechanism without electromagnetic interference, and the driving mechanism is connected with a power part. According to the test device, the driving mechanism outputs a constant rotating speed under the effect of the power part, the rotation of the brushless motor is constant, the back electromotive force generated by a coil after rotation of the brushless motor is input to an oscilloscope, and an oscillogram is generated. The test device avoids electromagnetic interference so that the oscillogram generated by the oscilloscope can prevent interference. Therefore, according to the test device and a test method, the back electromotive force of the brushless motor can be accurately and conveniently measured, the method is simple and feasible, and the promotion is facilitated.

Description

Technical field [0001] The invention relates to the technical field of brushless motors, in particular to a test device and a test method that are convenient and capable of relatively accurately measuring the back electromotive force of a brushless motor. Background technique [0002] With the rise of drone aerial photography and model aircraft industry, brushless motors as their main power source have also received more and more attention. Brushless motors have reliable performance, no mechanical wear, low failure rate, small size, and high efficiency. The advantages have made its application field shift from the initial military field to the commercial field; from the industrial field to the civilian field rapidly expanding. [0003] Because the brushless motor uses electronic commutation technology to replace the mechanical commutation of the traditional motor, its drive control technology is also very different from the traditional motor. The brushless motors currently used in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R31/34
CPCG01R19/0084G01R31/343
Inventor 刘元江彭峰陈志刘鹏周忠厚
Owner GOERTEK INC