Durability test control system for direct-current brush motor with double EGR (Exhaust Gas Recirculation) valves

Abstract

The invention discloses a double-EGR-valve DC brush motor endurance test control system, which comprises a test host used for testing a DC motor, a main controller used for controlling the test of the DC motor, an adjustable power supply used for supplying power to the main controller, and an upper computer used for setting working parameters to enable the test motor to operate according to a set value, the input end of the adjustable power supply is connected with a 220V mains supply, the output end of the adjustable power supply is connected with the power supply input end of the main controller, and the main controller is electrically connected with the test host and the upper computer respectively. According to the endurance test control system for the double-EGR-valve direct-current brush motor, endurance test control can be independently carried out on the direct-current brush motor, the structure is simple, the components are basically and simply combined, the mode that the interaction force of the two motors simulates loads is adopted, and the durability test control system is simple in structure and high in reliability. Load durability testing can be carried out on the two testing motors at the same time under various severe conditions, waste of EGR valve parts is reduced at the same time, and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor durability testing, and more particularly to a dual-EGR valve DC brushed motor durability test control system. Background Art

[0002] With the increasing adoption of hybrid vehicles, EGR valves are becoming widely used. Due to a combination of component cost and service life, most EGR valves currently use brushed DC motors. As a critical component of EGR valves, brushed DC motors require regular batch durability testing to ensure reliability and consistency.

[0003] Common durability tests include high-temperature operation tests, low-temperature operation tests, and high and low-temperature impact tests. The commonly used testing method is to directly install the motor into the EGR valve product for control testing. However, because it is a batch and long-term test, it will cause waste of other EGR valve components. If the motor test is carried out alone, there is no suitable load, especially a load that can work normally under various harsh conditions (including low temperature, high temperature, high and low temperature alternation, etc.). Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a dual EGR valve DC brushed motor durability test control system to solve the problems in the background technology.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0006] A dual-EGR valve DC brush motor durability test control system includes a test host for testing the DC motor, a main controller for controlling the DC motor test, an adjustable power supply for powering the main controller, and a host computer for setting operating parameters so that the test motor operates according to the set values. The input end of the adjustable power supply is connected to a 220V mains power supply, and the output end of the adjustable power supply is connected to the power input end of the main controller. The main controller is electrically connected to the test host and the host computer respectively.

[0007] To further optimize the technical solution, the test host includes a base, a motor bracket seat is provided on the base, two grooves for placing the test motor are provided on the motor bracket seat, a motor bracket bolt for fixing the test motor is provided above the motor bracket seat through a motor bracket fixing nut, and the test motor is electrically connected to the main controller through the test motor control interface; a test bracket main gear is provided at the inner center of the motor bracket seat through the main gear shaft, and gears connecting the two test motors are respectively engaged on both sides of the test bracket main gear, and a magnet that rotates with the test bracket main gear is provided at the outer center of the test bracket main gear; a rotation angle sensor for detecting the rotation angle and number of turns of the magnet is provided through a sensor bracket at the front end of the magnet, and the rotation angle sensor is electrically connected to the main controller through the sensor interface.

[0008] To further optimize the technical solution, a rotation angle sensor protective glue is provided on the peripheral side of the rotation angle sensor for protecting the rotation angle sensor.

[0009] To further optimize the technical solution, the main controller includes a shell, on which is provided an operation button for starting the main controller, a buzzer for issuing an abnormal alarm, and a display screen for displaying the test status and fault information. The side end of the shell is provided with a sensor connection interface and a test motor interface for connecting to the test host, a controller power interface for connecting to an adjustable power supply, and a controller communication interface for connecting to a host computer. A controller is provided in the shell, the output end of the operation button is connected to the input end of the controller, the output end of the controller is respectively connected to the input end of the buzzer and the display screen, the controller is respectively electrically connected to the sensor connection interface, the test motor interface and the controller communication interface, and the controller power interface is connected to the power input end of the controller.

[0010] To further optimize the technical solution, the main controller is also provided with an indicator light for indicating abnormal operation of the test motor, and the input end of the indicator light is connected to the output end of the controller.

[0011] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is as follows.

[0012] The present invention provides a dual EGR valve DC brush motor durability test control system, which can independently perform durability test control on the DC brush motor. It has a simple structure and the components are basically a simple combination. It adopts the method of simulating the load by the interaction force between two motors, so that the two test motors can be subjected to load durability test at the same time under various harsh conditions. At the same time, it reduces the waste of EGR valve parts and improves the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention; Figure 2This is a schematic structural diagram of the test host of the present invention; Figure 3 This is a schematic diagram of the structural installation of the test host of the present invention; Figure 4 Schematic diagram of the structure of the main controller of the present invention.

[0014] Wherein: 1. Test host, 11. Base, 12. Motor bracket, 13. First test motor, 14. Second test motor, 15. Motor bracket bolt, 16. Motor bracket fixing nut, 17. Test bracket main gear, 18. Main gear shaft, 19. Magnet, 110. First test motor gear, 111. Second test motor gear, 112. Angle sensor, 113. Angle sensor protective glue, 114. Sensor bracket, 115. First test motor control interface, 116. Second test motor control interface, 117. Sensor interface; 2. Main controller, 21. Housing, 22. Run button, 23. Indicator light, 24. Buzzer, 25. Display, 26. Sensor connection interface, 27. Test motor interface, 28. Controller power interface, 29. Controller communication interface; 3. Adjustable power supply, 4. Host computer. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] A dual EGR valve DC brush motor durability test control system, combined with Figure 1 As shown, it includes a test host 1, a main controller 2, an adjustable power supply 3 and a host computer 4. The test host 1 is used to test the DC motor, the main controller 2 is used to control the test of the DC motor, the adjustable power supply 3 is used to power the main controller, and the host computer 4 is used to set the working parameters so that the test host runs according to the set values. The input end of the adjustable power supply is connected to the 220V mains power, and the output end of the adjustable power supply is connected to the power input end of the main controller. The main controller 2 is electrically connected to the test host 1 and the host computer 4 respectively.

[0017] The test host 1 includes a base 11, on which a motor bracket seat 12 is provided. The motor bracket seat 12 has two grooves, which are used to place the first test motor 13 and the second test motor 14 respectively. A motor bracket bolt 15 is provided above the motor bracket seat 12 to fix the two test motors. The motor bracket bolt 15 is set on the motor bracket seat 12 through a motor bracket fixing bolt 16. The first test motor 13 and the second test motor 14 are electrically connected to the main controller 2 through the first test motor control interface 115 and the second test motor control interface 116 respectively. The control signal of the main controller is accessed through the test motor control interface, so that the test motor runs according to the desired duty cycle and direction.

[0018] A test stand main gear 17 is provided at the inner center of the motor support seat 12 via a main gear shaft 18. A first test motor gear 110 and a second test motor gear 111 are respectively engaged on either side of the test stand main gear 17. The first test motor gear 110 is connected to the motor shaft of the first test motor 13, and the second test motor gear 111 is connected to the motor shaft of the second test motor 14. A magnet 19 is provided at the outer center of the test stand main gear 17, and the magnet 19 rotates with the test stand main gear 17. A rotation angle sensor 112 is provided at the front end of the magnet 19 via a sensor bracket 114 for detecting the rotation angle and number of revolutions of the magnet 19. The rotation angle sensor 112 is electrically connected to the main controller 2 via a sensor interface 117 to provide power to the angle sensor and output sensor signals.

[0019] Angle sensor protective glue 113 is provided around the angle sensor 112 to protect the angle sensor 112 and ensure that no moisture enters the surface of the angle sensor 112 under high temperature, low temperature, high and low temperature conditions.

[0020] The main controller 2 includes a housing 21, on which a run button 22, an indicator light 23, a buzzer 24 and a display screen 25 are provided. The run button 22 is used to start the main controller. When the indicator light 23 detects that the test motor is working abnormally, the indicator light is on. The buzzer 24 rings when the indicator light is on, reminding the tester to handle it as soon as possible. The display screen 25 is used to display the current test status and fault information. The side end of the housing 21 is provided with a sensor connection interface 26, a test motor interface 27, a controller power interface 28 and a controller communication interface 29. The sensor connection interface 26 is connected to the sensor interface on the test host 1 to realize the power supply and signal input of one or more groups of sensors. The test motor interface 27 is respectively connected to the test motor interface on the test host 1 to realize the output of one or more groups of test motor control signals. The controller power interface 28 is connected to the adjustable power supply 3 to charge the main controller. The controller communication interface 29 is used to connect the host computer 4 to realize the communication connection between the main controller and the host computer. A controller is provided in the shell 21, the output end of the run button is connected to the input end of the controller, the output end of the controller is respectively connected to the input ends of the indicator light, the buzzer and the display screen, the controller is respectively electrically connected to the sensor interface, the test motor interface and the controller communication interface, and the controller power interface is connected to the power input end of the controller.

[0021] Adjustable power supply 3 controls the power supply to main controller 2, ensuring its proper operation. It controls the test motor according to the specified data and receives signals from the rotation angle sensor. Adjustable power supply 3 is a commercially available regulated power supply that adjusts its output voltage based on actual usage, providing a stable DC voltage for the main controller.

[0022] The host computer 4 is used to establish a communication connection with the main controller 2 and set working parameters to the main controller before working so that the test motor can run according to the set values.

[0023] When the present invention is testing, the main controller is connected to one or more test hosts through the test motor control interface and the sensor interface, the adjustable power supply supplies power to the main controller through the power interface of the main controller, and the host computer is connected to the main controller through the controller communication interface. During operation, the host computer sets relevant working parameters, for example, the first test motor and the second test motor are set with different duty cycles and directions, and switch alternately to ensure that the first test motor and the second test motor are running with load through the transmission of the main gear, which is closer to the actual usage; at the same time, the two motors can be tested at the same time, and the two motors can serve as loads for each other; in addition, the main controller can analyze the angle signal sent back by the motor duty cycle control and the angle sensor, and control the indicator light and the buzzer to work respectively according to whether the endurance test of the test motor is normal; after setting the parameters, the host computer can be moved as needed, or the host computer can be continued to be used to record the test data.

[0024] Assume that a durability test is required on the first and second test motors. The test motors are required to switch forward and reverse every 10 seconds, while a 20% load is simulated on the test motors. The test environment temperature is -40°C. The first and second test motors are properly placed on the motor bracket, ensuring that their gears mesh with the main gear of the test bracket. The motor bracket bolts are then secured to the motor bracket using the motor bracket fixing nuts to ensure the motors are fixed in place during the durability test. After the test motors are secured, the test host is placed in a high-temperature chamber. Test cables are used to connect the sensor interface and the test host interface on the test host to the main controller. The main controller is then connected to the adjustable power supply and the host computer for power and communication. The host computer is used to set the two motors to a 20% duty cycle load and normal control, respectively. The motors rotate in opposite directions (i.e., after the main gear force is reversed, the motor with the larger normal control motor has a 20% load in the opposite direction). The switching interval is 10 seconds. After the parameters are set, they are saved and the relevant parameters are recorded in the memory of the main controller; set the temperature of the high and low temperature box to -40℃, and after the temperature reaches the specified value, click the run button of the motor host computer or the run button of the main controller, and the main controller controls the first test motor and the second test motor to perform an endurance test. Because the two motors are set to 20% duty cycle load and normal control rotation respectively, the setting directions are opposite, and the two motors switch directions every 10s, so the two motors act as 20% duty cycle load application motors once every 10s and as normally controlled test motors once.

[0025] During the test, the angle sensor detects the rotation of the test stand's main gear. If a motor anomaly occurs during the test, the main controller identifies it by detecting abnormal rotation of the test stand's main gear or an abnormal motor duty cycle, and controls the indicator lights and buzzer. For single or multiple tests, the display accurately indicates which motor group has an anomaly and the cause. Finally, depending on the test needs, the host computer can be retained for test data recording or removed directly, while the main controller continues to operate. In the event of an unexpected power outage, the set parameters are still in the main controller's memory, so pressing the Run button will allow the main controller to continue controlling the test.

Claims

1. A dual EGR valve DC brushed motor durability test control system, characterized by: The invention comprises a test host (1) for testing a DC motor, a main controller (2) for controlling the test of the DC motor, an adjustable power supply (3) for supplying power to the main controller, and a host computer (4) for setting working parameters so that the test motor operates according to the set values, wherein the input end of the adjustable power supply is connected to a 220V mains power supply, the output end of the adjustable power supply is connected to the power input end of the main controller, and the main controller (2) is electrically connected to the test host (1) and the host computer (4) respectively.

2. A dual EGR valve DC brushed motor durability test control system according to claim 1, characterized in that: The test host (1) comprises a base (11), a motor support seat (12) is provided on the base (11), two grooves for placing the test motor are provided on the motor support seat (12), a motor support bolt (15) for fixing the test motor is provided above the motor support seat (12) through a motor support fixing nut (16), and the test motor is electrically connected to the main controller (2) through a test motor control interface; a test support main gear (17) is provided at the inner center of the motor support seat (12) through a main gear shaft (18), gears connecting two test motors are respectively engaged on both sides of the test support main gear (17), and a magnet (19) that rotates with the test support main gear (17) is provided at the outer center of the test support main gear (17); a rotation angle sensor (112) for detecting the rotation angle and number of turns of the magnet (19) is provided at the front end of the magnet (19) through a sensor bracket (114), and the rotation angle sensor (112) is electrically connected to the main controller (2) through a sensor interface (117).

3. A dual EGR valve DC brush motor durability test control system according to claim 2, characterized in that: A rotation angle sensor protective glue (113) for protecting the rotation angle sensor (112) is provided on the peripheral side of the rotation angle sensor (112).

4. The dual EGR valve DC brush motor durability test control system according to claim 1, characterized in that: The main controller (2) includes a housing (21), and the housing (21) is provided with a run button (22) for starting the main controller, a buzzer (24) for issuing an abnormal alarm, and a display screen (25) for displaying a test status and fault information. The side end of the housing (21) is provided with a sensor connection interface (26) and a test motor interface (27) for connecting to a test host (1), a controller power interface (28) for connecting to an adjustable power supply (3), and a controller communication interface (29) for connecting to a host computer (4). A controller is provided in the housing (21), the output end of the run button is connected to the input end of the controller, the output end of the controller is respectively connected to the input end of the buzzer and the display screen, the controller is respectively electrically connected to the sensor connection interface, the test motor interface, and the controller communication interface, and the controller power interface is connected to the power input end of the controller.

5. The dual EGR valve DC brush motor durability test control system according to claim 4, characterized in that: The main controller (2) is also provided with an indicator light (23) for indicating abnormal operation of the test motor, and the input end of the indicator light is connected to the output end of the controller.

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