Motor overload test system

Abstract

The utility model relates to a motor overload test system, which comprises a motor to be tested, a motor fixing frame, a brake, a direct current stabilized power supply, a motor power supply, a current detection device and a controller, and is characterized in that the brake is in transmission connection with a motor output shaft of the motor to be tested through a coupler, and the brake generates braking force to form torsion acting on the motor output shaft; the voltage output end of the DC stabilized power supply is connected with the voltage input end of the brake. The voltage output end of the motor power supply is connected with the voltage input end of the to-be-tested motor. The current detection device detects the current value of the to-be-tested motor during working, and the controller is connected with the to-be-tested motor and the current detection device, so that the effect of adjusting the load acting on the to-be-tested motor based on the torque applied to the to-be-tested motor by the brake is achieved, and the requirements of overload tests for different types of motors are met. And the applicability is higher.

Description

Technical Field

[0001] The utility model relates to the field of electric motors, in particular to an electric motor overload test system. Background Art

[0002] For electrical equipment with remote control or automatic control functions and using electric motors, it is usually necessary to carry out a motor overload test on the electrical equipment.

[0003] At present, the overload test of the motor of the electrical equipment is usually to supply power to the electrical equipment at the rated voltage, and then make the electrical equipment work in normal working state until the motor runs to a stable state, and then on the basis of the motor running in a stable state, by setting different loads on the electrical equipment or manually loading the rotor to increase the load again so that the working current of the motor increases to a preset multiple (for example, the working current increases by 10%), and let the electrical equipment work again until the motor of the electrical equipment is in a stable state again, and keep the power supply voltage of the motor in the electrical equipment unchanged at this time. By repeating the above-mentioned load increase and making the motor work again to a stable state, the protection device of the electrical equipment finally starts the protection action or the motor of the electrical equipment stops rotating.

[0004] However, the above-mentioned motor overload method for electrical equipment has shortcomings: due to the different types of motors, different types and quantities of loads need to be configured for different types of motors to complete the motor overload test, which increases the number of load configurations and reduces the applicability of the motor overload test method for testing different types of motors. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a motor overload test system with stronger applicability to different types of motors in view of the above-mentioned prior art.

[0006] The utility model solves the above technical problems by adopting the following technical solution: a motor overload test system comprises a motor to be tested, the motor to be tested has a motor output shaft, and is characterized in that it also comprises:

[0007] Motor fixing frame, for placing the motor to be tested;

[0008] A brake is drivingly connected to the motor output shaft of the motor to be tested through a coupling; wherein the brake generates a braking force to form a torque acting on the motor output shaft;

[0009] A DC regulated power supply, whose voltage output terminal is connected to the voltage input terminal of the brake;

[0010] A motor power supply, whose voltage output terminal is connected to the voltage input terminal of the motor to be tested;

[0011] A current detection device, for detecting the current value of the motor to be tested when it is working;

[0012] The controller is respectively connected to the motor to be tested and the current detection device.

[0013] Improved, in the motor overload test system, the brake is a magnetic powder brake.

[0014] Improved, in the motor overload test system, the brake is a brake connected to a controller, so that the brake can generate the braking force under the control of the controller.

[0015] Furthermore, in the motor overload test system, for the brake connected to the controller, the controller and the brake are wirelessly connected.

[0016] As a further improvement, in the motor overload test system, the controller and the current detection device are connected by wireless communication.

[0017] Improved, in the utility model, the engine overload test system further comprises a prompt device, which is connected to the controller.

[0018] Optionally, in the motor overload test system, the prompt device is a light prompt device and / or a sound prompt device.

[0019] As a further improvement, in the utility model, the motor overload test system is characterized in that it also includes a bearing platform, and the motor fixing frame and the brake are both arranged on the bearing platform.

[0020] Compared with the prior art, the advantages of the utility model are: in the motor overload test system of the utility model, by adding a brake, a DC regulated power supply, a motor power supply, a current detection device and a controller, the brake is connected to the motor output shaft of the motor to be tested through a coupling, and the brake generates a braking force to form a torque acting on the motor output shaft. The torque applied to the motor output shaft by the brake is changed by adjusting the current output by the DC regulated power supply to the brake, so as to achieve the effect of changing the load applied to the motor to be tested. The current detection device sends the current situation corresponding to the entire process from the start of the motor to the change to a stable state after the load is increased to the controller for processing, thereby achieving the effect of adjusting the load acting on the motor to be tested based on the torque applied to the motor to be tested by the brake, meeting the needs of overload testing for different types of motors, and being more applicable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a motor overload test system in Embodiment 1 of the present utility model;

[0022] Figure 2 This is a schematic diagram of a motor overload test system in Embodiment 2 of the present utility model; DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] Embodiment 1

[0025] This embodiment 1 provides a motor overload test system. Specifically, see Figure 1 As shown, the motor overload test system of this embodiment includes a motor 1 to be tested, a motor fixing frame 21, a brake 22, a DC regulated power supply 23, a motor power supply 24, a current detection device 25 and a controller 26; the motor 1 to be tested has a motor output shaft 11, the motor fixing frame 21 and the brake 22 are both placed on a bearing platform 28, the brake 22 is connected to the motor output shaft 11 of the motor 1 to be tested through a coupling 221, and the brake 22 of this embodiment preferably adopts a magnetic powder brake; the controller 26 is connected to the motor 1 to be tested and the current detection device 25 respectively. Among them, the brake 22 generates a braking force to form a torque acting on the motor output shaft 11, the voltage output end of the DC regulated power supply 23 is connected to the voltage input end of the brake 22 to supply power to the brake; the voltage output end of the motor power supply 24 is connected to the voltage input end of the motor 1 to be tested; the current detection device 25 is responsible for detecting the current value of the motor 1 to be tested when it is working.

[0026] When the motor overload test system is used to perform a motor overload test, the output current output to the magnetic powder brake is adjusted by the DC regulated power supply, and the magnetic powder brake generates a braking force that changes with the output current of the DC regulated power supply and acts on the motor output shaft of the motor to be tested through the coupling to form a torque acting on the motor output shaft. The torque becomes the load loaded on the motor to be tested, causing the working current of the motor to be tested to change until the motor to be tested runs to a stable state. The current detection device sends the working current of the motor to be tested from the start to the stable state to the controller for processing. Since the torque generated by the magnetic powder brake and acting on the motor output shaft changes with the output current of the DC regulated power supply, the purpose of adjusting the load size acting on the motor to be tested based on the change of the output current of the DC regulated power supply is achieved, thereby meeting the needs of overload tests for different types of motors and being more applicable.

[0027] According to actual needs, the controller 26 of this embodiment can also be connected to the current detection device 25 by wireless communication.

[0028] To remind of the status of the entire motor overload test system, as needed, the motor overload test system of this embodiment further includes a prompting device 27, and the prompting device 27 is connected to the controller 26. For example, the prompting device 27 here is a light prompting device and / or a sound prompting device. Once the current value detected by the current detection device reaches the preset prompting value, the controller commands the prompting device 27 to perform a prompting action.

[0029] Embodiment 2

[0030] This Embodiment 2 provides another motor overload test system. The difference from Embodiment 1 is as follows. Refer to Figure 2 As shown, in the motor overload test system of this Embodiment 2, the brake 22 is a brake connected to and controlled by the controller 26. In this way, the torque applied by the brake to the motor output shaft can be adjusted by the control of the controller by the controller, so as to achieve the purpose of loading different loads to the motor under test as needed.

[0031] Of course, according to actual needs, the brake 22 and the controller 26 of this embodiment are wirelessly communicatively connected.

[0032] Although the preferred embodiments of the present invention have been described in detail above, it should be clearly understood that various changes and modifications can be made to the present invention for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Motor overload test system, including a motor under test (1), the motor under test (1) has a motor output shaft (11), characterized in that, Further comprising: A motor fixing bracket (21) for placing the motor to be tested (1); A brake (22) drivingly connected to the motor output shaft (11) of the motor to be tested (1) through a coupling (221); wherein, the brake (22) generates a braking force to form a torque acting on the motor output shaft (11); A DC regulated power supply (23) whose voltage output terminal is connected to the voltage input terminal of the brake (22); A motor power supply (24) whose voltage output terminal is connected to the voltage input terminal of the motor to be tested (1); A current detection device (25) for detecting the current value when the motor to be tested (1) is operating; A controller (26) respectively connected to the motor to be tested (1) and the current detection device (25).

2. The motor overload test system according to claim 1, wherein The brake (22) is a magnetic powder brake.

3. The motor overload test system according to claim 1, characterized in that, The brake (22) is a brake connected to the controller (26).

4. The motor overload test system according to claim 3, wherein The controller (26) and the brake (22) are wirelessly communicatively connected.

5. The motor overload test system according to claim 1, characterized in that, The controller (26) and the current detection device (25) are wirelessly communicatively connected.

6. The motor overload test system according to any one of claims 1 to 5, characterized in that, Further comprising a prompting device (27), and the prompting device (27) is connected to the controller (26).

7. The motor overload test system according to claim 6, characterized in that, The prompting device (27) is a light prompting device or / and a sound prompting device.

8. The motor overload test system according to any one of claims 1 to 5, characterized in that, Further comprising a carrying platform (28), and both the motor fixing bracket (21) and the brake (22) are disposed on the carrying platform (28).

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