TWM595693U - Motor performance measurement system - Google Patents

Abstract

A performance measurement system of a motor is used to detect a motor to be tested. The performance measurement system includes a speed control machine, a data acquisition controller, and a computer. Among them, the speed control machine includes a frame and a drive motor, the test motor and the drive motor are mounted on the frame, and the drive motor is used to drive the test motor to rotate, so that the three sets of winding circuits of the test motor induce three For the back electromotive force signal, the computer obtains the above three sets of back electromotive force signal and the speed signal of the drive motor through the data acquisition controller to understand the performance data of the motor to be tested.

Description

Motor performance measurement system

This creation has data about a motor performance measurement system that can detect various motor performances.

At present, in Taiwan, riding electric bicycles has become a trend, and electric bicycles can not only be used as leisure travel tools, but also achieve the effect of fitness. However, when developing new electric bicycles, the developers of electric bicycles may choose motors of different brands, and the performance parameters of these motors of different brands (such as the phase of the back electromotive force parameter and the Hall signal) are very likely. Different manufacturers do not necessarily provide information on various parameters, which will cause confusion and inconvenience for R&D personnel, and it is difficult for R&D personnel to further optimize the control and design of the motor controller of different brands or models of motors With adjustments.

One of the purposes of this creation is to provide a motor performance measurement system, which can obtain various performance data of a motor to be tested, as a reference for subsequent research and development.

The reason is that, according to the implementation of this creation, a performance measurement system for motors is provided to detect a motor under test. The motor under test has a first power output shaft and three sets of winding circuits. The performance The measurement system includes a speed control machine, a data acquisition controller and a computer. The rotation speed control machine includes a frame body and a drive motor. The drive motor is disposed on the frame body and has a second power output shaft, and the second power output shaft is connected to the first power output shaft. The drive motor can be driven to rotate the first power output shaft and output a speed signal, and the second power output shaft is rotated When the above three sets of winding circuits are induced to generate three back EMF signals. The data acquisition controller is electrically connected to the speed control machine and the three sets of winding circuits of the motor under test to obtain the speed signal and the three back electromotive force signals. The computer is electrically connected to the data acquisition controller and obtains the speed signal and the three back electromotive force signals through the data acquisition controller.

In this way, the R&D personnel can use the above-mentioned motor performance measurement system to actually drive the motor to be tested to rotate, and obtain the information such as the commutation point of each back-EMF signal through the above three back-EMF signals, and can also match the obtained speed Signal to calculate the value of the back EMF constant of the motor under test, so that the R&D personnel can not only understand the performance data of the motor under test, but also follow up the above performance data to subsequently control and design the motor control board of the motor under test Do further optimization and adjustment.

1: Measurement system

10: Speed control machine

11: Frame

12: drive motor

13: axis of rotation

14a-14c: Support frame

20: Data acquisition controller

30: Computer

50: motor under test

51: Speed reduction mechanism

52: Motor control board

A: Chuck

B: Bearing

C: Coupling

U, V, W: winding circuit

h1-h3: Hall signal line

The detailed structure, characteristics, assembly or use of the motor performance measurement system will be described in the following embodiments. However, it should be understood that the embodiments and drawings to be described below are only for illustrative purposes. It should not be used to limit the scope of the patent application of this creation, where: FIG. 1 is a perspective view of the speed control machine of the motor performance measurement system of the embodiment.

2 is a block diagram of components of a motor performance measurement system of an embodiment.

FIG. 3 is a relationship diagram of back electromotive force and time obtained by the motor performance measurement system of the embodiment.

In order to explain the technical characteristics of this creation in detail, the following embodiments are described in conjunction with the drawings as follows. Among them: please refer to FIG. 1 first, a motor performance measurement system 1 provided by the embodiments, which is used to Detect a motor 50 to be tested. In this embodiment, the motor 50 to be tested is an electric bicycle Hub motor (hereinafter referred to as the motor under test 50), the motor under test 50 includes a first power output shaft (the first power output shaft in FIG. 1 is a chuck of the speed control machine 10 of the performance measurement system 1 (Shielded by A), three sets of winding lines U, V, W and three Hall signal lines h1, h2, h3, winding lines U, V, W and Hall signal lines h1, h2, h3 are used to control the test The rotation of the motor 50. The performance measurement system 1 includes a speed control machine 10, a data acquisition controller 20, and a computer 30.

The speed control machine 10 includes a frame 11, a driving motor 12 and a rotating shaft 13. The frame body 11 includes a plurality of sets of support frames 14a-14c. In this embodiment, the driving motor 12 is a servo motor (hereinafter referred to as driving motor 12). The driving motor 12 includes a speed reduction mechanism 51 and a second power output shaft (covered by the support frame 14a in FIG. 1). The motor 12 is erected on the support frame 14a. The rotating shaft 13 is sleeved with two bearings B, and is rotatably mounted on the support frame 14b through the two bearings B. One end of the rotating shaft 13 is coaxially connected to the second power output shaft through a coupling C to rotate The opposite end of the shaft 13 is coaxially connected to the chuck A, and the chuck A is coaxially connected to the first power output shaft, so that when the drive motor 12 is driven, the drive motor 12 can sequentially rotate the second power output shaft, the rotation shaft 13, The chuck A and the first power output shaft, and the drive motor 12 will output a speed signal when rotating the second power output shaft, and when the first power output shaft rotates, the above three sets of winding circuits U, V, W will be induced to generate three back-EMF signals.

Please refer to Figure 2. The data acquisition controller 20 is electrically connected to the speed control machine 10 and the three sets of winding circuits U, V, W of the motor 50 to obtain the speed signal and the three back-EMF signals, so that the computer 30 can control the data acquisition The generator 20 obtains the rotational speed signal and the above three counter electromotive force signals. In addition, the data acquisition controller 20 can also receive instructions from the computer 30 and transmit the data to a motor control board 52 of the motor 50 to be tested.

In this embodiment, the computer 30 is a computer with general calculation and storage functions. The computer 30 is electrically connected to the data acquisition controller 20 and can acquire and store items obtained through the data acquisition controller 20. The signals (that is, the speed signal and the back electromotive force signal) can also display the above signals as needed. When possible, the three sets of back-EMF signals may be first transmitted to an oscilloscope display (see FIG. 3), and then the three sets of back-EMF signals may be output to the computer 30 via the oscilloscope.

In actual measurement, when the R&D personnel want to know the performance data of a certain motor 50 to be tested, the R&D personnel can first mount the motor 50 to be tested on the frame body 11 and make the first power output of the motor 50 to be tested The shaft is coaxially connected to the collet A. After that, the driving motor 12 is started, so that the driving motor 12 starts to drive the first power output shaft of the motor under test 50 to rotate, so that the winding circuits U, V, W of the motor under test 50 are induced to generate three back EMF signals. Finally, the computer 30 obtains the speed signal generated by the driving motor 12 when driving the motor 50 to be tested and the three sets of back EMF signals through the data acquisition controller 20. R&D personnel can use the following relationship: V = K _e . ω , where V is the back electromotive force, K _e is the back electromotive force constant, and ω is the rotation speed of the motor 50 to be measured (in this embodiment, the rotation speed of the motor 50 to be measured is equal to the rotation speed of the drive motor 12, which can be obtained from the rotation speed signal) and Obtain the back EMF constant of the motor 50 to be tested, so that the R&D personnel can understand the various performance data of the motor 50 to be tested (including the back EMF constant, the size of the back EMF signal and its commutation point), and the R&D personnel can also use the back EMF Understand the corresponding relationship between the winding circuits U, V, W and the Hall signal lines h1-h3, so that the R&D personnel can correctly output the signal to the motor control board 52, which is convenient for the R&D personnel to control the motor control board 52 of the motor 50 under test Do further optimization and adjustment with the design.

Finally, it must be explained again that the methods and components disclosed in the foregoing embodiments of the present utility model are only examples, and are not intended to limit the patent scope of the present utility model. Any simple structural retouching that does not deviate from the spirit of the present utility model Or changes or replacements with other equivalent elements should still fall within the scope covered by the patent application of this utility model.

10: Speed control machine

20: Data acquisition controller

30: Computer

50: motor under test

52: Motor control board

Claims (5)

A motor performance measurement system is used to detect a motor to be tested. The motor to be tested has a first power output shaft and three sets of winding circuits. The performance measurement system includes: a speed control machine, including There is a frame body and a drive motor, the drive motor is disposed on the frame body and has a second power output shaft, the second power output shaft is connected to the first power output shaft, and the drive motor can be driven to rotate the first A power output shaft also outputs a speed signal. When the second power output shaft is rotated, the three sets of winding circuits are induced to generate three back EMF signals; a data acquisition controller is electrically connected to the speed control machine and the The three sets of winding circuits of the motor to be tested obtain the speed signal and the three back EMF signals; a computer is electrically connected to the data acquisition controller and obtains the speed signal and the three through the data acquisition controller Back EMF signal. According to the motor performance measurement system described in item 1 of the patent application range, the drive motor is a servo motor. According to the motor performance measurement system described in item 1 of the patent application scope, wherein the rotational speed control machine further includes a rotating shaft, the rotating shaft is rotatably provided on the frame body and the two ends are coaxially connected to the first and The second power output shaft. According to the motor performance measurement system described in item 3 of the patent application scope, wherein the speed control machine further includes a coupling, the coupling is disposed between the second power output shaft and the rotating shaft. A motor performance measurement system is used to detect a motor to be tested. The motor to be tested has a first power output shaft and three sets of winding circuits. The performance measurement system includes: a speed control machine, including There is a frame body and a drive motor, the drive motor is disposed on the frame body and has a second power output shaft, the second power output shaft is connected to the first power output shaft, and the drive The dynamic motor can be driven to rotate the first power output shaft and output a speed signal. When the second power output shaft is rotated, the three sets of winding circuits are induced to generate three back EMF signals; a data acquisition controller, The three sets of winding circuits electrically connecting the speed control machine and the motor to be tested, the data acquisition controller can be controlled to obtain the speed signal and the three back-EMF signals.

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