Motor test tool structure

Abstract

The utility model relates to a test tool structure. A motor testing tool structure comprises a testing support, a to-be-tested motor is installed on the testing support, a connecting structure is connected to a motor shaft of the to-be-tested motor, an external magnetic ring is installed outside the connecting structure, a sensor is installed below the connecting structure, the sensor is installed on the testing support, and a motor magnetic ring containing cavity is formed in the connecting structure. And an adjusting structure is arranged on the test bracket. The utility model provides a motor test tool structure which is simple in structure, can realize comprehensive state evaluation of various motors, and is easy to realize closed weak magnetic control. The technical problem that the motor performance test controller in the prior art cannot test the comprehensive performance of the motor is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of test tool structure, in particular to a kind of motor test tool structure. BACKGROUND

[0002] With the development of automobile electrification and intelligence, brake-by-wire system has become a research hotspot of current automobile braking technology. Among them, the electronic mechanical brake (EMB) system has great development potential due to its simple structure (no hydraulic system), fast response speed, precise brake force control, lightweight, environmental protection, and deep integration with automatic driving system in the future. The performance of the electronic mechanical brake motor, as the core component of the automobile electronic mechanical brake system, is crucial to the automobile braking system.

[0003] In order to ensure that the electronic mechanical brake motor can work normally, the motor needs to be tested for performance. The motor dynamometer is used to conduct comprehensive performance tests such as no-load test, load test, maximum torque and minimum torque test, starting torque and starting current test. Due to the high speed (6000-10000 rpm) and precise control of the electronic mechanical brake motor, it needs to have a sense of closed loop and weak magnetic control. The model control used for general motor testing does not meet the test conditions (model control is open loop control, with poor control accuracy and unable to perform weak magnetic control). SUMMARY

[0004] The utility model provides a kind of motor test tool structure with simple structure, which can realize comprehensive state evaluation of various motors and easily realize closed weak magnetic control. The technical problem that the motor performance test controller cannot test the comprehensive performance of the motor in the prior art is solved.

[0005] The above-mentioned technical problem of this utility model is solved by the following technical solution: A motor testing fixture structure includes a test bracket, on which a motor to be tested is mounted. A connecting structure is connected to the motor shaft of the motor to be tested. An external magnetic ring is mounted outside the connecting structure. A sensor is mounted below the connecting structure and is mounted on the test bracket. A magnetic ring receiving cavity is provided inside the connecting structure. An adjustment structure is provided on the test bracket. The motor to be tested is mounted on the test bracket, with one end containing the magnetic ring extending out of the test bracket. Due to the limitation of the magnetic ring's mounting position, a connecting structure is added, and an external magnetic ring is mounted outside the connecting structure to replace the magnetic ring, thereby simulating the motor state. The rotation of the motor shaft is sensed by a sensor below the external magnetic ring, and the angular position of the external magnetic ring is detected by the sensor to obtain the motor rotor position. The connecting structure is externally connected to a dynamometer via a coupling. The dynamometer simulates the motor's operating conditions, and a controller, sensor, PWM generator, power supply, and motor are connected outside the motor to form a closed-loop field weakening control strategy. This enables a comprehensive evaluation of the motor performance. The test bracket can be adjusted according to the model of the motor being tested, thereby enabling performance testing of various motors.

[0006] Preferably, the connection structure includes a connecting body, with a stepped shaft mounting section connected to one end of the connecting body, and a motor magnetic ring accommodating cavity at the other end of the connecting body. An internal gear segment is formed at the end of the motor magnetic ring accommodating cavity facing the motor, and the internal gear segment meshes with a gear on the motor shaft of the motor under test. The stepped shaft mounting section includes a coupling connecting section and an external magnetic ring mounting section. The external magnetic ring mounting section connects to the connecting body, and the end of the external magnetic ring abuts against the end face of the connecting body. Positioning is achieved through a stepped shaft, resulting in a simple structure. A cavity is formed on one side of the connecting body to accommodate the motor magnetic ring on the motor shaft, while internal gears can be formed at the end of the cavity to facilitate meshing and transmission with the external gear on the motor shaft.

[0007] Preferably, the external magnetic ring and the external magnetic ring mounting section are interference-fitted.

[0008] Preferably, the test bracket includes a base plate and a vertical plate perpendicular to the base plate. The adjustment structure consists of fixed elongated slots on both sides of the base plate, and a through hole for the motor shaft to pass through on the vertical plate. The motor to be tested and the sensor are respectively mounted on both sides of the vertical plate. The fixed elongated slots determine the position of the test bracket on the dynamometer platform, thereby determining the relative position of the test bracket and the dynamometer, facilitating the connection between the dynamometer and the motor to be tested.

[0009] Preferably, the sensor is a Hall sensor, which is fixed below the through hole of the vertical plate of the test bracket by a sensor bracket, and the Hall sensor is correspondingly matched with the external magnetic ring.

[0010] Therefore, the motor testing fixture structure of this utility model has the following advantages:

[0011] 1) The modular design offers high flexibility, allowing for the testing of various motor specifications by replacing different vertical plates;

[0012] 2) External sensors can overcome the limitations of the motor magnetic ring position, making it easy to place Hall sensors, thereby forming a sensor-controlled closed loop for precise control;

[0013] 3) Field weakening control can be achieved by controlling the voltage / current / phase parameters output to the motor stator outside the tooling, which can be used to test high-speed motors. Attached Figure Description

[0014] Figure 1 This is a 3D diagram of a motor testing fixture structure.

[0015] Figure 2 yes Figure 1 Another perspective of the three-dimensional image.

[0016] Figure 3 It is a 3D view with the connecting structure and outer magnetic ring removed.

[0017] Figure 4 yes Figure 1 A three-dimensional diagram of the internal connection structure.

[0018] Figure 5 yes Figure 4 A sectional view.

[0019] Figure 6 This is a structural block diagram of the application (thick solid lines represent mechanical connections, thin solid lines represent power supply electrical connections, and dotted lines represent control signal electrical connections). Detailed Implementation

[0020] The technical solution of the utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0021] Example:

[0022] like Figure 1 and 2As shown in Figure 3, a motor testing fixture structure includes a test support, which is composed of a base plate 2 and a vertical plate 1 that are perpendicular to each other. A triangular rib 7 supports the connection between the base plate 2 and the vertical plate 1. The vertical plate 1 is fixed to the base plate 2 with screws. A circular hole 15 is provided on the vertical plate 1, and the housing 9 of the motor to be tested is installed on one side of the vertical plate 1 with screws. A magnetic ring 18 and a gear 17 are installed on the motor shaft 16 of the motor to be tested. The motor shaft 16 passes through the circular hole 15 and can be connected to a coupling via a connecting structure, and then connected to a dynamometer via the coupling. An elongated cylindrical fixing groove 8 is provided on each side of the base plate 2 for fixing it to the dynamometer platform with screws, allowing adjustment of the front and rear positions of the test support to determine the distance between the motor to be tested and the dynamometer.

[0023] like Figure 4 and 5 As shown, the connecting structure 3 includes a cylindrical connecting body 12. A stepped shaft mounting section is connected to one end of the connecting body 12, and a motor magnetic ring accommodating cavity 13 is provided at the other end of the connecting body. An internal gear section 14 is formed at the end of the motor magnetic ring accommodating cavity 13 facing the motor side. The internal gear section 14 meshes with a gear 17 on the motor shaft 16 of the motor under test. The stepped shaft mounting section includes a coupling connecting section 10 and an external magnetic ring mounting section 11. The external magnetic ring mounting section 11 is connected to the connecting body 12, and the end of the external magnetic ring 4 abuts against the end face of the connecting body 12. The external magnetic ring 4 and the external magnetic ring mounting section 11 are interference-fitted.

[0024] A Hall sensor 5 is installed below the connecting structure. The Hall sensor 5 is mounted on a sensor bracket 6, which is fixed below the circular hole 15 of the vertical plate 1. The Hall effect is used to detect the angular position of the external magnetic ring, thereby obtaining the position of the motor rotor. The sensor bracket is fixed to the vertical plate with screws to ensure accurate sensor position and appropriate gap between the sensor and the magnetic ring.

[0025] like Figure 6 As shown, after the motor under test is mounted on the test bracket, the test bracket is mounted on a dynamometer platform that is adjustable in both height and horizontal direction. The motor shaft is aligned with the dynamometer shaft, and the dynamometer is connected to the connecting shaft using a coupling. The controller is then connected to the Hall sensor, PWM generator, power supply, and motor. The dynamometer performs a load test on the motor. The motor's operation transmits signals to the controller, which then outputs voltage / current / phase parameters to the motor stator to achieve field weakening control, thereby adjusting the motor speed and realizing closed-loop test control.

[0026] The specific embodiments described herein are merely illustrative of the concept of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. An electrical machine test fixture structure, characterized by: The utility model relates to a test support, which is provided with a motor to be tested, a connecting structure connected to a motor shaft of the motor to be tested, an external magnetic ring installed outside the connecting structure, a sensor installed below the connecting structure, and a motor magnetic ring accommodating cavity formed in the connecting structure.

2. The motor test fixture structure of claim 1, wherein: The connecting structure comprises a connecting body, a stepped shaft type mounting segment connected to one end of the connecting body, and a motor magnetic ring accommodating cavity formed in the other end of the connecting body.

3. A motor testing fixture structure as claimed in claim 2, wherein: The external magnetic ring is in interference fit with the external magnetic ring mounting segment.

4. A motor testing fixture structure as claimed in claim 1 or 2 or 3, wherein: The test support comprises a base plate and a vertical plate perpendicular to the base plate.

5. A motor testing fixture structure as claimed in claim 1 or 2 or 3, wherein: The sensor is a Hall sensor, which is fixed below the through hole of the vertical plate of the test support through a sensor support and corresponds to the external magnetic ring.

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