Safety electrical connection mechanism for function detection of a dynamometer

Abstract

The utility model relates to vehicle air conditioner compressor detection technical field, concretely relates to a kind of dynamometer function detection safety electrical connection mechanism:Including starting contactor, discharge contactor, high voltage capacitor, discharge resistance, LED pilot lamp, test start button and test stop button, starting contactor and high voltage capacitor are set in high voltage direct-current power supply and the high voltage direct-current bus of measured controller assembly, starting contactor controls power on-off, high voltage capacitor can inhibit the inrush current when contactor action, reduce the impact to measured controller assembly, avoid TVS tube burst, test stop, discharge contactor attraction, discharge through discharge resistance for high voltage capacitor, LED pilot lamp real-time display discharge state, guarantee the safety of operator, measured controller assembly is connected with measured permanent magnet synchronous motor, operating computer communication, ensure that test data accurate acquisition and analysis, improve the security and data accuracy of test process.

Description

Technical Field

[0001] This utility model relates to the field of automotive air conditioning compressor testing technology, and in particular to a safe electrical connection mechanism for dynamometer function testing. Background Technology

[0002] The electric air conditioning compressor for new energy vehicles (hereinafter referred to as electric compressor) is one of the key components of automotive air conditioning. The performance of its core components, the motor and controller assembly, determines the product's energy efficiency ratio.

[0003] The performance of the motor and controller assembly is tested using a dynamometer to assess the conformity of the components with technical requirements. During the operation of the dynamometer testing platform, due to the involvement of high-voltage electricity, there are significant surges when the contactor switches operate. In some cases, the TVS diode in the test controller assembly has even exploded due to the surge, which has a significant impact on the safety of the test operators and the accuracy of the test data.

[0004] Therefore, it is necessary to design a high-voltage electrical connection control mechanism that features low surge, visible discharge status, and safe operation. Summary of the Invention

[0005] The purpose of this utility model is to provide a safe electrical connection mechanism for dynamometer function testing, which solves the problem in the prior art that when using a dynamometer to test the performance of a motor and controller assembly, due to the involvement of high voltage electricity, there is a large surge when the contactor switch is activated, and in some cases, the TVS tube of the test controller assembly may even explode due to the surge, which has a great impact on the safety of the test operator and the accuracy of the test data.

[0006] To achieve the above objectives, this utility model provides a safe electrical connection mechanism for dynamometer function testing. The mechanism includes a starting contactor, a discharging contactor, a high-voltage capacitor, a discharging resistor, an LED indicator, a test start button, and a test stop button. The starting contactor and the high-voltage capacitor are located on the high-voltage DC bus of the high-voltage DC power supply and the controller assembly under test. The high-voltage DC power supply is located next to the dynamometer and receives three-phase AC 380V input. It outputs high-voltage DC power to the controller assembly under test according to a set value. The high-voltage capacitor and the discharging contactor are connected on the high-voltage DC bus of the controller assembly under test. The LED indicator and the discharging resistor are connected in series on the high-voltage positive bus of the controller assembly under test. The test start button and the test stop button are electrically connected to the discharging contactor. The controller assembly under test is electrically connected to the permanent magnet synchronous motor under test. Both the controller assembly under test and the permanent magnet synchronous motor under test are communicatively connected to an operating computer.

[0007] The controller assembly under test receives instructions from the operating computer and drives the permanent magnet synchronous motor under test to operate. The operating computer receives messages from the controller assembly under test, collects the operating parameters of the permanent magnet synchronous motor under test, and outputs the performance data of the controller assembly under test and the permanent magnet synchronous motor under test.

[0008] The start contactor and the discharge contactor are interlocked, and the test start button and the test stop button are interlocked.

[0009] When the starting contactor is closed, the discharge contactor automatically disconnects; when the discharge contactor is engaged, the starting contactor disconnects.

[0010] When the test start button is turned on, the test stop button is automatically turned off; when the stop button is pressed, the start button is automatically turned off.

[0011] This utility model discloses a safe electrical connection mechanism for dynamometer function testing, comprising a starting contactor, a discharging contactor, a high-voltage capacitor, a discharging resistor, an LED indicator, a test start button, and a test stop button. By installing the starting contactor and the high-voltage capacitor on the high-voltage DC bus of the high-voltage DC power supply and the controller assembly under test, the starting contactor controls the power supply switching, and the high-voltage capacitor suppresses the surge current during contactor operation, reducing the impact on the controller assembly under test and preventing TVS diode rupture. The discharging contactor, LED indicator, and discharging resistor ensure that when the test stops, the discharging contactor engages, discharging the high-voltage capacitor through the discharging resistor. The LED indicator displays the discharge status in real time, ensuring operator safety. The controller assembly under test is communicatively connected to the permanent magnet synchronous motor under test and the operating computer, ensuring accurate data acquisition and analysis, thus improving the safety and accuracy of the testing process. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the operating principle of the dynamometer functional testing safety electrical connection mechanism provided by this utility model.

[0014] Figure 2 This utility model provides a schematic diagram of the filtering principle during the start-up process of a dynamometer test.

[0015] Figure 3 This utility model provides a schematic diagram of the dynamometer's test stopping discharge process.

[0016] 1-High voltage DC power supply, 21-Start contactor, 22-Discharge contactor, 3-High voltage capacitor, 4-Discharge resistor, 5-LED indicator light, 61-Test start button, 62-Test stop button, 7-Controller assembly under test, 8-Permanent magnet synchronous motor under test, 9-Operating computer. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0018] Please see Figures 1 to 3 This utility model provides a safe electrical connection mechanism for dynamometer function testing. The mechanism includes a starting contactor 21, a discharging contactor 22, a high-voltage capacitor 3, a discharging resistor 4, an LED indicator 5, a test start button 61, and a test stop button 62. The starting contactor 21 and the high-voltage capacitor 3 are located on the high-voltage DC bus of the high-voltage DC power supply 1 and the controller assembly under test 7. The high-voltage DC power supply 1 is located next to the dynamometer. The high-voltage DC power supply 1 receives three-phase AC 380V input and outputs high-voltage DC power to the controller under test according to a set configuration. Assembly 7, the high voltage capacitor 3 and the high voltage DC bus of the controller assembly under test 7 are provided with the discharge contactor 22, the discharge contactor 22 and the high voltage positive bus of the controller assembly under test 7 are connected in series with the LED indicator 5 and the discharge resistor 4, the test start button 61 is electrically connected to the start contactor 21, the test stop button 62 is electrically connected to the discharge contactor 22, the controller assembly under test 7 is electrically connected to the permanent magnet synchronous motor 8 under test, and both the controller assembly under test 7 and the permanent magnet synchronous motor 8 under test are communicatively connected to the operating computer 9.

[0019] In this embodiment, by installing the starting contactor 21 and the high-voltage capacitor 3 on the high-voltage DC bus of the high-voltage DC power supply 1 and the controller assembly under test 7, the starting contactor 21 controls the power supply switching, and the high-voltage capacitor 3 can suppress the surge current when the contactor operates, reducing the impact on the controller assembly under test 7 and preventing the TVS tube from exploding. A discharge contactor 22, an LED indicator 5, and a discharge resistor 4 are also installed. When the test stops, the discharge contactor 22 engages, discharging the high-voltage capacitor 3 through the discharge resistor 4. The LED indicator 5 displays the discharge status in real time, ensuring operator safety. The controller assembly under test 7 is communicatively connected to the permanent magnet synchronous motor under test 8 and the operating computer 9, ensuring accurate data acquisition and analysis, and improving the safety and accuracy of the testing process.

[0020] Specifically, after the test controller assembly 7 and the test permanent magnet synchronous motor 8 are installed on the dynamometer test bench, the high voltage DC power supply 1 is set to output high voltage according to the high voltage setting of the test controller assembly 7, the test start button 61 is turned on, and the test stop button 62 is automatically turned off.

[0021] Furthermore, when the starting contactor 21 closes, the discharge contactor 22 automatically disconnects.

[0022] Furthermore, the high-voltage capacitor 3 charges and discharges to suppress high-voltage DC input ripple, while simultaneously outputting a stable high-voltage DC to the controller assembly under test 7.

[0023] Furthermore, the controller assembly under test 7 receives control commands from the operating computer 9, converts the high-voltage direct current into three-phase alternating current, and drives the permanent magnet synchronous motor under test 8 to operate.

[0024] Furthermore, the operating computer 9 receives feedback messages from the controller assembly 7, collects data on the operation of the tested permanent magnet synchronous motor 8, and completes the processing and analysis of the performance data of the controller assembly 7 and the tested permanent magnet synchronous motor 8.

[0025] Furthermore, after the controller assembly 7 and the tested permanent magnet synchronous motor 8 have completed the performance test, pressing the stop button 62 will automatically disconnect the start button 61.

[0026] Furthermore, the discharge contactor 22 engages, and the starting contactor 21 disengages.

[0027] Furthermore, the high-voltage capacitor 3, the discharge resistor 4, and the LED indicator 5 form a circuit. When the high-voltage capacitor 3 is in a discharging state, the LED indicator 5 is lit to indicate the charge status of the high-voltage capacitor.

[0028] Furthermore, when the LED indicator 5 goes out, the discharge process ends, indicating that the charge of the high-voltage capacitor 3 is below the safe value, and subsequent operations such as installation and disassembly of the controller assembly 7 and the permanent magnet synchronous motor 8 under test can be carried out.

[0029] In summary, this invention achieves low high-voltage DC surge during the power-on process of the dynamometer when testing the controller assembly and the permanent magnet synchronous motor under test, thus improving the safety of the controller assembly under test; and automatically discharges upon power-off and displays the discharge status in real time, thereby improving the visibility of safe operation of the equipment and enhancing the safety of the operator.

[0030] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A safety electrical connection mechanism for dynamometer function testing, characterized in that, The test setup includes a start contactor, a discharge contactor, a high-voltage capacitor, a discharge resistor, an LED indicator, a test start button, and a test stop button. The start contactor and the high-voltage capacitor are located on the high-voltage DC bus of the high-voltage DC power supply and the controller assembly under test. The high-voltage DC power supply is located next to the dynamometer and receives a three-phase AC 380V input. It outputs high-voltage DC power to the controller assembly under test according to a set setting. The discharge contactor is connected to the high-voltage capacitor and the high-voltage DC bus of the controller assembly under test. The LED indicator and the discharge resistor are connected in series between the discharge contactor and the high-voltage positive bus of the controller assembly under test. The test start button and the test stop button are electrically connected to the discharge contactor. The controller assembly under test is electrically connected to the permanent magnet synchronous motor under test. Both the controller assembly under test and the permanent magnet synchronous motor under test are communicatively connected to an operating computer.

2. The dynamometer function testing safety electrical connection mechanism as described in claim 1, characterized in that, The controller assembly under test receives instructions from the operating computer and drives the permanent magnet synchronous motor under test to operate. The operating computer receives messages fed back by the controller assembly under test, collects the operating parameters of the permanent magnet synchronous motor under test, and outputs the performance data of the controller assembly under test and the permanent magnet synchronous motor under test.

3. The dynamometer function testing safety electrical connection mechanism as described in claim 2, characterized in that, The start contactor and the discharge contactor are interlocked, and the test start button and the test stop button are interlocked.

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