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Permanent magnet motor characteristic quantity measuring device and torque coefficient measuring method

A technology for permanent magnet motors and measuring devices, applied in measuring devices, motor generator testing, force/torque/power measuring instruments, etc., can solve problems such as difficult to determine, cumbersome operations, and inability to detect back EMF coefficients, and achieve cost reduction , the effect of increasing versatility

Inactive Publication Date: 2015-05-20
BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patent, the force motor and the test motor are directly connected through a corrugated coupling, and the acquisition of the speed signal is completed through the encoder of the servo motor, so its use is limited, and it cannot be used for general permanent magnet motors that do not include encoders. To detect the back EMF coefficient
In addition, this patent can only detect the back electromotive force coefficient, but cannot detect the torque coefficient
According to existing data, there is no measuring device capable of simultaneously measuring torque coefficient and back EMF coefficient in the domestic market.
[0005] In addition, in the process of measuring the characteristic quantity coefficient, on the one hand, due to the different motor parameters of different permanent magnet motors, it is necessary to match different drivers for it, so that the permanent magnet motor can be driven properly, so as to complete the detection of the characteristic quantity coefficient. The drive detection method not only increases the cost, but also increases the detection steps, and the operation is cumbersome; on the other hand, since the drive current and test current of the permanent magnet motor are provided by the drive, it is difficult to determine the drive current when the magnetic field of the permanent magnet motor reaches saturation. And the proportion of the test current, it is difficult to determine the test current in the end when the current is large, the permanent magnet motor has a torque inflection point due to the saturation of the magnetic field

Method used

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  • Permanent magnet motor characteristic quantity measuring device and torque coefficient measuring method
  • Permanent magnet motor characteristic quantity measuring device and torque coefficient measuring method
  • Permanent magnet motor characteristic quantity measuring device and torque coefficient measuring method

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Such as figure 1 As shown, a measuring device for characteristic quantities of a permanent magnet motor provided in this embodiment includes a prime mover 1, a motor to be tested 2, a first coupling 31, a second coupling 32, a display controller 4, a rotary Torque speed sensor 5, support and test bench 7.

[0045] One end of the torque speed sensor 5 is rotatably connected to the motor 2 to be tested through a first coupling 31 , and the other end of the torque speed sensor 5 is rotatably connected to the prime mover 1 through a second coupling 32 . In addition to this connection method, two torque speed sensors 5 can also be used, and the two torque speed sensors 5 are respectively rotatably connected to the motor 2 to be tested and the prime mover 1 . Since the rotation of the prime mover 1 and the motor 2 to be tested is directly transmitted to the torque speed sensor 5 through the coupling, the accuracy of the torque signal and the detection value of the speed sign...

Embodiment 2

[0050] Such as figure 2 As shown, on the basis of Embodiment 1, further, a display controller 4 provided in Embodiment 2 includes a display 41 and a controller 42, the controller 42 is electrically connected to the display 41, and the controller 42 will The calculation result is sent to the monitor for display.

[0051] Further, the controller 42 includes a data acquisition unit 421 , a function switching unit 422 , a signal processing unit 423 , a single-chip computing unit 424 and a drive control unit 425 .

[0052] The single-chip computing unit 424 is used for calculating and storing the data of the characteristic quantity of the permanent magnet motor, and delivering the calculation result to the display 41 for display, and it is electrically connected with the signal processing unit 423, and can carry out data interaction with the signal processing unit 423, And perform operations on the data provided by the signal processing unit 423 . The single-chip computer operat...

Embodiment 3

[0058] Such as image 3 As shown, on the basis of Embodiment 1 and Embodiment 2, further, the display controller 4 provided in Embodiment 3 is provided with an electrical interface to facilitate the prime mover 1, the motor to be tested 2 and the torque speed sensor 5 The connection with the display controller 4 also facilitates the replacement of the prime mover 1 , the motor to be tested 2 and the torque speed sensor 5 , especially the replacement of the motor to be tested 2 .

[0059] The electrical interface includes a prime mover interface 431, a machine to be tested interface 432, and a sensor interface 433. The prime mover interface 431 is used to connect the prime mover 1, and it is electrically connected with the drive control unit 425, so that the prime mover 1 can be easily connected with the drive control unit 425. electrical connection.

[0060] The DUT interface 432 is used to connect the DUT motor 2 , the sensor interface 433 is used to connect the torque speed...

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Abstract

The invention discloses a permanent magnet motor characteristic quantity measuring device, and belongs to the field of a permanent magnet motor measuring device. The measuring device comprises a prime mover, a motor to be measured and a shaft coupler, wherein the prime mover is connected with the motor to be measured through the shaft coupler, the permanent magnet motor characteristic quantity measuring device also comprises a display control instrument and a torque and rotating speed sensor, the display control instrument is used for measuring a torque coefficient and a back electromotive force coefficient, the torque and rotating speed sensor is respectively and rotatablely connected with the prime mover and the motor to be measured through the shaft coupler, the display control instrument is respectively and electrically connected with the prime mover, the motor to be measured and the torque and rotating speed sensor. The measuring device has the switching function, the torque coefficient detection can be carried out, and the back electromotive force coefficient detection can also be realized. The invention also discloses a torque coefficient measuring method used for the measuring device of the permanent magnet motor to be measured. In the torque coefficient measuring mode, the torque inflection point of the permanent magnet motor due to magnetic field saturation is precisely measured.

Description

technical field [0001] The invention relates to the field of measuring devices for permanent magnet motors, in particular to a measuring device for characteristic quantities of permanent magnet motors and a method for measuring torque coefficients through the measuring device. Background technique [0002] Permanent magnet motors are often used in many fields such as aerospace, aviation, transportation, industry, and agriculture, and have a wide range of uses. In practical applications, it is often necessary to use measuring devices to measure the characteristic quantities of permanent magnet motors. Moment coefficient and back EMF coefficient, torque coefficient and back EMF coefficient are the basic characteristic quantities that characterize the output characteristics of permanent magnet motors, especially for servo products, the system performance debugging often requires the above parameters as a basis. [0003] The torque coefficient is numerically equal to the ratio o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34G01L5/00
Inventor 魏娟闫海媛郭喜彬郑再平
Owner BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
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