CN-224216841-U - Motor back electromotive force and inductance difference coefficient test platform and system

CN224216841UCN 224216841 UCN224216841 UCN 224216841UCN-224216841-U

Abstract

The utility model provides a motor counter electromotive force and inductance difference coefficient testing platform and system, which comprise a base, wherein a supporting frame is arranged on the base, a driving component for driving a loading arm to rotate is arranged on the supporting frame, the driving component is connected with a horizontal part of the loading arm, two ends of a vertical part of the loading arm are symmetrically provided with a group of clamping components, the clamping components are used for clamping hubs of a tested motor to enable the loading arm to drive the tested motor to rotate around a main shaft of the tested motor, one end of the main shaft is arranged on the horizontal part of the loading arm, the other end of the main shaft is arranged at the top of a limiting frame, and the bottom of the limiting frame is in sliding connection with the base. According to the motor counter electromotive force and inductance difference coefficient testing platform, the tested motor can be quickly installed through the matching of the clamping assembly and the limiting frame, the counter electromotive force and inductance can be tested on the testing platform once, the inductance testing and counter electromotive force testing equipment is integrated in the testing cabinet, an integrated multi-parameter cooperative testing platform is formed, and high automation is achieved.

Inventors

ZHANG MINGZENG
Heichanghao
MAO XIN
Sang Jiapo
HU YUNSHU
LIU SHUYUN

Assignees

天津炜衡科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250522

Claims (10)

1. A motor back electromotive force and inductance difference coefficient testing platform is characterized by comprising a base, wherein a supporting frame is arranged on the base, a driving component used for driving a loading arm to rotate is arranged on the supporting frame and connected with a horizontal portion of the loading arm, a group of clamping components are symmetrically arranged at two ends of a vertical portion of the loading arm and used for clamping a hub of a tested motor, the loading arm drives the tested motor to rotate around a main shaft of the tested motor, one end of the main shaft is arranged at the horizontal portion of the loading arm, the other end of the main shaft is arranged at the top of a limiting frame, and the bottom of the limiting frame is in sliding connection with the base.
2. The motor back electromotive force and inductance difference coefficient testing platform of claim 1, wherein the driving assembly comprises a driving motor, a transmission shaft and a bearing seat, the driving motor is mounted on the supporting frame, an output shaft of the driving motor is connected with one end of the transmission shaft, the other end of the transmission shaft penetrates through the bearing seat to be connected with the loading arm, the transmission shaft is connected with the bearing seat through a bearing, and the bearing seat is mounted on the supporting frame.
3. The motor counter electromotive force and inductance difference coefficient testing platform according to claim 1, wherein the clamping assembly comprises a clamping plate I and a clamping plate II which are arranged in parallel, the clamping plate I and the clamping plate II are used for clamping a hub and are connected through clamping bolts, the upper end of the clamping plate II is inclined and is in sliding fit with the lower end of a clamping plate III, the clamping plate III is connected with the clamping plate I close to two sides of the clamping plate I, the other side of the clamping plate I is connected with one end of a connecting rod, the other end of the connecting rod penetrates through a loading arm vertical portion, the connecting rod is mounted on a connecting plate, and the connecting plate is connected with the loading arm vertical portion.
4. The motor back electromotive force and inductance difference coefficient testing platform of claim 3, wherein the second clamping plate is provided with a sliding groove at the upper end, and the third clamping plate is provided with a protrusion for sliding fit with the sliding groove at the lower end.
5. The motor counter electromotive force and inductance difference coefficient testing platform according to claim 3 is characterized in that one end of the connecting plate is provided with a groove body for a connecting rod to pass through, the upper portion of the groove body is connected through a bolt, the connecting plate is provided with a first waist-shaped hole for connecting with a loading arm, and two ends of the vertical portion of the loading arm are respectively provided with a second waist-shaped hole matched with the first waist-shaped hole.
6. The motor counter electromotive force and inductance difference coefficient testing platform of claim 1, wherein the limiting frame comprises a limiting frame body, a sliding groove is formed in the bottom of the limiting frame body, a sliding rail matched with the sliding groove is arranged on the base, the base is connected with the limiting frame body through bolts, a plurality of grooves for accommodating a main shaft are formed in the upper portion of the limiting frame body, a cover plate is mounted on the top of each groove, and a tightening bolt for tightening the main shaft is arranged on the cover plate.
7. A system for testing counter electromotive force and inductance difference coefficient of a motor is characterized by comprising a driving module, a counter electromotive force testing module, an inductance testing module and an upper computer, wherein the driving module, the counter electromotive force testing module and the inductance testing module are respectively and electrically connected with the upper computer, the driving module is used for controlling the driving module to rotate, when no-load counter electromotive force is measured, the counter electromotive force testing module is connected with three outgoing lines of the motor to be tested, when inductance is measured, the inductance testing module is electrically connected with any two outgoing lines of the three outgoing lines of the motor to be tested.
8. The system for testing the counter electromotive force and inductance difference coefficient of the motor according to claim 7, wherein the counter electromotive force testing module comprises a terminal row, a first voltage sensor, a second voltage sensor, a third voltage sensor, a collecting instrument and a power supply unit, wherein a first pin, a second pin and a third pin of an access end of the terminal row are respectively connected with three outgoing lines of the motor to be tested, a first pin of an output end of the terminal row is respectively connected with a first pin of the first voltage sensor and a first pin of the third voltage sensor, a second pin of an output end of the terminal row is respectively connected with a second pin of the first voltage sensor and a first pin of the second voltage sensor, a third pin of the output end of the terminal row is respectively connected with a second pin of the second voltage sensor and a second pin of the third voltage sensor, an output pin of the first voltage sensor and an output pin of the third voltage sensor are respectively connected with a first pin, a second pin and a third pin of the collecting instrument, a fourteenth pin of the collecting instrument, a sixteenth pin of the second pin of the voltage sensor and a sixteenth pin of the third voltage sensor are respectively connected with the power supply unit of the first voltage sensor and the third voltage sensor.
9. The system for testing back electromotive force and inductance difference coefficient of motor according to claim 7, wherein the system further comprises a motor rated continuous output power module, wherein the motor rated continuous output power module comprises a temperature sensor, and the temperature sensor is arranged on the motor to be tested and used for measuring the temperature of the motor to be tested.
10. The system for testing the counter electromotive force and the inductance difference coefficient of the motor according to claim 7, further comprising a testing cabinet, wherein at least one transverse partition board is arranged in the testing cabinet, the testing platform is arranged on the transverse partition board, a vertical partition board is arranged between the driving assembly and the loading arm, and a driving module, a counter electromotive force testing module, an inductance testing module and a motor rated continuous output power module are arranged in the testing cabinet.

Description

Motor back electromotive force and inductance difference coefficient test platform and system Technical Field The utility model belongs to the technical field of performance test of hub motors, and particularly relates to a motor back electromotive force and inductance difference coefficient test platform and system. Background With the rapid development of motor technology, requirements on the precision, efficiency and automation degree of motor test equipment are increasingly increased. When the back electromotive force is measured in the specification of electric bicycle safety technical Specification GB17761-2024, an alternating current peak voltage measuring device with the accuracy not lower than 0.5% is adopted to respectively measure and record the voltage peak value between each two lines in three outgoing lines of the tested motor, and the average value of the three measured values is taken as the value of the no-load back electromotive force. When the inductance is measured, inductance measuring equipment with the accuracy not lower than +/-1% is used, the inductance measuring equipment is connected with any two lines of three outgoing lines of the motor, the motor rotor is slowly and continuously rotated in the same direction, each rotation electric angle is 30 degrees (the corresponding mechanical angle is 30 degrees divided by the pole pair number), the motor rotor is suspended once, the readings of the inductance measuring equipment when the motor rotor is positioned at the position for 3 times are recorded, the average value is taken, the inductance value of the angle is recorded, and after the operation is repeated for 12 times, the average value, the standard deviation and the difference coefficient of all the inductance values are calculated. At present, the detection platform of the motor needs to calibrate and align the rotation center of the rotation shaft of the motor to be detected and the rotation center of the detection station manually for many times, the detection platform drives the motor to be detected to reach the corresponding rotation speed by adopting a stepping motor, an asynchronous acquisition system is used for voltage acquisition when measuring back electromotive force, the back electromotive force is obtained through calculation, 12 times of operation are needed when measuring inductance value, and the average value and the standard deviation are obtained. Therefore, the traditional equipment has the defects of long running and recording time, long manual calculation time, large acquisition error and low voltage acquisition accuracy. In addition, the traditional equipment cannot carry out multi-parameter cooperative test, the measurement of the counter electromotive force and inductance difference coefficient of the tested motor is required to be arranged in an independent detection station, and the data coupling analysis is missing, so that the comprehensive evaluation error is larger. Disclosure of utility model In order to solve the problems in the prior art, the utility model aims to provide a motor back electromotive force and inductance difference coefficient testing platform and system, the rotation centers of a tested motor rotating shaft and a detection station are conveniently aligned, the back electromotive force and inductance difference coefficient are cooperatively tested, and the comprehensive evaluation error is reduced. In order to achieve the above purpose, the technical scheme of the utility model is realized as follows: A motor back electromotive force and inductance difference coefficient testing platform comprises a base, wherein a supporting frame is installed on the base, a driving component used for driving a loading arm to rotate is installed on the supporting frame and connected with the horizontal portion of the loading arm, a group of clamping components are symmetrically arranged at two ends of the vertical portion of the loading arm and used for clamping a hub of a tested motor, the loading arm drives the tested motor to rotate around a main shaft of the tested motor, one end of the main shaft is arranged on the horizontal portion of the loading arm, the other end of the main shaft is installed at the top of a limiting frame, and the bottom of the limiting frame is in sliding connection with the base. Further, the drive assembly comprises a drive motor, a transmission shaft and a bearing seat, wherein the drive motor is arranged on the support frame, an output shaft of the drive motor is connected with one end of the transmission shaft, the other end of the transmission shaft penetrates through the bearing seat to be connected with the loading arm, the transmission shaft is connected with the bearing seat through a bearing, and the bearing seat is arranged on the support frame. The clamping assembly comprises a clamping plate I and a clamping plate II which are arranged in parallel, the clamping plate I and the clamping plate II are used