System for testing power supply characteristics of EPS controller

Abstract

The utility model provides a system for testing power supply characteristics of an EPS controller, which belongs to the technical field of controller testing and comprises a testing module, a power supply module, an EPS controller and an upper computer module, the output end of the testing module is connected with the input end of the power supply module, the output end of the power supply module is connected with the input end of the EPS controller, and the upper computer module is connected with the EPS controller. The output end of the EPS controller is connected with the input end of the test module, and the output end of the test module is connected with the input end of the upper computer module. The test module outputs a control signal to the power supply module, the power supply module outputs a test power supply to the EPS controller, the EPS controller outputs parameter information to the test module, and the test module outputs test information to the upper computer module. According to the utility model, the anti-interference capability of the EPS controller is tested by carrying out voltage characteristic test on the EPS controller, and the reliability of the EPS controller is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the controller test field, specifically, the utility model relates to a system for testing power supply characteristics of EPS controller. BACKGROUND

[0002] With the wide application of EPS in various fields, the reliability and stability of its controller are required more and more, which leads to the increasing demand for testing of EPS controller.

[0003] Chinese patent 221056609U discloses a quick and simple EPS motor radial load pressure testing device. A quick and simple EPS motor radial load pressure testing device, comprising a clamping tool, an EPS motor, characterized in that: one end of the clamping tool is connected with the EPS motor, the other set of the clamping tool is provided with a bearing, a fixed belt is provided on the outer edge of the bearing, and the bottom of the fixed belt is connected with a weight.

[0004] The prior art tests the EPS controller, which affects the reliability of the EPS controller. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a system for testing power supply characteristics of EPS controller, so as to achieve the technical purpose of providing testing and improving the reliability of EPS controller.

[0006] In order to achieve the above purpose, the technical scheme adopted by the utility model is:

[0007] The utility model provides a system for testing power supply characteristics of EPS controller: including test module, power supply module, EPS controller and host computer module, the output end of test module is connected with the input end of power supply module, the output end of power supply module is connected with the input end of EPS controller, the output end of EPS controller is connected with the input end of test module, and the output end of test module is connected with the input end of host computer module.

[0008] The test module outputs control signals to the power supply module, the power supply module outputs test power to the EPS controller, the EPS controller outputs parameter information to the test module, and the test module outputs test information to the host computer module.

[0009] The test module includes a switch button, a single-chip microcomputer and a display screen, the switch button includes a test module power switch button, a mode switching button and three voltage characteristic test buttons, the output ends of the power switch button, the mode switching button and the three voltage characteristic test buttons are respectively connected with the input ends of the single-chip microcomputer, and the output end of the single-chip microcomputer is connected with the input end of the display screen.

[0010] The power supply module comprises a programmable power supply and two N-type field effect tubes, the output ends of the programmable power supply are connected to the drain electrodes of the two N-type field effect tubes respectively, and the source electrodes of the two N-type field effect tubes are connected to the input ends of the EPS controller respectively.

[0011] The pulse width modulation output pins of the single-chip microcomputer are connected to the gate electrodes of the two N-type field effect tubes respectively.

[0012] The upper computer module adopts a computer, and the computer is connected with the test module through a CAN bus.

[0013] The technical effect of the utility model is:

[0014] (1) The utility model improves the test efficiency, can automatically complete the slow rise and slow drop of voltage and the voltage characteristic change process, reduces the complexity and time cost of manual operation. At the same time, since the test process is more stable and reliable, the number of repeated tests due to test failure is also reduced, thereby improving the overall test efficiency.

[0015] (2) The utility model has low design cost, simple operation and is convenient to maintain. The utility model is miniaturized and rationalized, easy to maintain and maintain. Modular design makes each component easy to disassemble and replace, reducing maintenance cost and time; SMT32 chip development is adopted, ordinary materials and common materials are used, the design cost is low, and it is convenient to purchase; the control mode is also the familiar key switch form, and the real-time state is displayed through the screen, so that the test personnel can easily get started.

[0016] (3) The utility model enhances the accuracy of the test, and the test EPS controller power characteristic control device can ensure that the voltage change process is consistent every time, thereby enhancing the accuracy of the test. This helps to maintain the consistency of test results in tests conducted at different times and by different personnel, facilitating accurate evaluation and comparison of the performance of the EPS controller.

[0017] (4) The utility model is suitable for more extensive test requirements and can adapt to different test requirements, such as simulating voltage changes under different working conditions, evaluating the performance of the controller in different voltage ranges, etc. This makes the test of the EPS controller more comprehensive and in-depth, which helps to find potential problems and optimize them. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present specification includes the following drawings, and the shown contents are as follows:

[0019] Figure 1 It is a logic structure block diagram of the utility model one kind test EPS controller power characteristic system;

[0020] Figure 2The utility model provides a kind of circuit diagram of the system of testing EPS controller power supply characteristic;

[0021] Figure 1 Marked as:1, test module;2, power supply module;3, EPS controller;4, host computer module. DETAILED DESCRIPTION

[0022] The specific embodiments of the utility model are further described in detail by comparing with the drawings and the description of the embodiments, the purpose is to help the technical personnel in the field to have more complete, accurate and in-depth understanding of the utility model concept, technical scheme of the utility model, and help its implementation.

[0023] The utility model provides a kind of system of testing EPS controller power supply characteristic, including test module 1, power supply module 2, EPS controller 3 and host computer module 4, the output end of test module 1 is connected the input end of power supply module 2, the output end of power supply module 2 is connected the input end of EPS controller 3, the output end of EPS controller 3 is connected the input end of test module 1, the output end of test module 1 is connected the input end of host computer module 4.

[0024] Test module 1 output control signal to power supply module 2, power supply module 2 output test power to EPS controller 3, EPS controller 3 output parameter information to test module 1, test module 1 output test information to host computer module 4.

[0025] Test module 1 includes switch button, single-chip microcomputer and display screen, switch button includes test module 1 power switch button, mode switching button, three voltage characteristic test buttons, the output end of power switch button, mode switching button, three voltage characteristic test buttons is connected respectively the input end of single-chip microcomputer, the output end of single-chip microcomputer is connected the input end of display screen.

[0026] Power supply module 2 includes program-controlled power supply and two N-type field effect tubes, the output end of program-controlled power supply is connected respectively the drain of two N-type field effect tubes, the source of two N-type field effect tubes is connected respectively the input end of EPS controller 3.Pulse width modulation output pin of single-chip microcomputer is connected respectively the gate of two N-type field effect tubes.Host computer module 4 uses computer, and computer is connected through CAN bus with test module 1.

[0027] The utility model in brief is described in detail as follows.

[0028] The utility model relates to a system of testing EPS controller power supply characteristic includes test module 1, power supply module 2, EPS controller 3 and host computer module 4, wherein test module 1 is used for setting voltage variation parameter, and the output voltage of power supply module 2 is controlled, and the input voltage of EPS controller 3, execution time and parameter variation under different modes are monitored simultaneously.Test module 1 includes switch button, singlechip and display screen, and switch button includes test module power switch button, mode switching button, three voltage characteristic test buttons, and test module 1 power switch button is used for controlling the switch of test module 1, and mode switching button is used for switching test mode, and the test mode of the utility model includes voltage slow rise slow drop test and voltage characteristic test to EPS controller 3, and voltage characteristic test is controlled through three voltage characteristic test buttons, including IG voltage characteristic test, power positive voltage characteristic and simultaneous test IG voltage characteristic and power positive voltage characteristic to EPS controller 3, and singlechip is used for testing EPS controller 3 according to the instruction of mode switching button and three voltage characteristic test buttons input, and the singlechip model of the utility model is STM32F103C8T6, and display screen is used for real-time monitoring EPS controller 3, and shows the current test mode, measured object, voltage value and test time, and display screen adopts LCD12864 display screen.

[0029] Power supply module 2 is used to provide the adjustable voltage required for testing, and power supply module 2 includes a programmable power supply and two identical N-type field effect tubes, the programmable power supply can be set, and the voltage of the programmable power supply in the embodiment of the application is 13.5V, and the current is 50A. Test module 1 controls the power output of the programmable power supply by controlling the N-type field effect tube through the output of the pulse width modulation output interface.

[0030] EPS controller 3 is used as a measured unit, and the utility model aims at testing the anti-power voltage fluctuation of EPS controller 3.

[0031] Host computer module 4 uses a computer, and is used for recording the working state and data of EPS controller 3, so as to further evaluate the performance of EPS controller 3.

[0032] The connection relationship of the utility model will be described in detail below.

[0033] As Figure 2As shown, the power input passes through AC-DC converter (AC220V-DC24V), voltage reduction chip (LM2576S-5.0) and adjustable voltage stabilizer (LM1117-3.3) to output 3.3V power to the power input end of single-chip microcomputer (STM32F103C8T6) and the power input end of display screen (LCD12864), the switch button is connected to the input end of single-chip microcomputer (STM32F103C8T6), the pulse width modulation output pin of the single-chip microcomputer is connected to the gate of two N-type field effect tubes respectively, the IG output interface and B+ output interface of the program-controlled power supply are connected to the drain of two N-type field effect tubes respectively, the source of two N-type field effect tubes is connected to the IG interface and B+ interface of EPS controller 3 respectively, the source of two N-type field effect tubes is connected to the ground through four electrolytic capacitors respectively, the input end of the analog-to-digital converter of single-chip microcomputer (STM32F103C8T6) is connected to the IG interface and B+ interface of EPS controller 3, the output end of single-chip microcomputer (STM32F103C8T6) is connected to the input end of display screen (LCD12864), and the output end of single-chip microcomputer (STM32F103C8T6) is connected to the input end of the computer through the JTAG interface.

[0034] The working process of the utility model is described in detail below.

[0035] First, test module 1, power supply module 2, EPS controller 3 and host computer module 4 are connected according to the connection relationship, and the power switch button of test module 1 is pressed, and voltage slow rise and slow drop test and voltage characteristic test are carried out on EPS controller 3, specifically, the mode switching button is switched to voltage slow rise and slow drop test, test module 1 controls the power voltage output of power supply module 2 to slow rise and slow drop, in the embodiment, the power voltage output of power supply module 2 is first reduced from 13.5V to 0V, and then increased from 0V to 13.5V, and the change rate is 0.5V / min. When voltage characteristic test is carried out, test module 1 is switched to voltage characteristic test through the mode switching button, and IG voltage characteristic test, power positive voltage characteristic and simultaneous test of IG voltage characteristic and power positive voltage characteristic are carried out through three voltage characteristic test buttons respectively. During the test, the display screen displays the current test mode, the measured object, and the current voltage value and the test time. The computer monitors and records the state and data of EPS controller 3 through the input of test module 1. After the test is completed, the user analyzes the test conclusion by processing the data through the computer.

[0036] The technical effects of the utility model are described in detail below.

[0037] The utility model improves test efficiency, can automatically complete voltage slow rise and fall and voltage characteristic change process, reduces complexity and time cost of manual operation.

[0038] The utility model discloses low design cost, easy operation, convenient maintenance. The utility model discloses miniaturization, rationalization, easy maintenance and maintenance. Modular design makes each component can be easily disassembled and replaced, reduces maintenance cost and time;The SMT32 chip development that adopts, material is common and common, and the design cost is low, and it is convenient to purchase;The control mode that adopts is also the button switch form that personnel is familiar with, and through screen display real-time state simultaneously, makes test personnel very easy to get started.

[0039] The utility model enhances the accuracy of test, and the power characteristic control device of EPS controller 3 can ensure that the voltage change process is consistent every time, thereby enhancing the accuracy of test. This helps to maintain the consistency of test results in tests carried out at different times and by different personnel, facilitating accurate evaluation and comparison of the performance of the EPS controller 3.

[0040] The utility model adapts to more extensive test demand, can adapt to different test demand, such as simulating voltage change under different working conditions, evaluating the performance of the controller in different voltage ranges, etc. This makes the test of the EPS controller 3 more comprehensive and in-depth, which helps to find potential problems and optimize them.

[0041] The utility model has been described exemplarily above in combination with the drawings. Obviously, the specific implementation of the utility model is not limited by the above method. As long as various non-essential improvements are made by adopting the method concept and technical solution of the utility model, or the above-mentioned concept and technical solution of the utility model is directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A system for testing power supply characteristics of an EPS controller, characterized by: The application relates to a test system for an electric power steering system (EPS), which comprises a test module, a power supply module, an EPS controller and an upper computer module, wherein the output end of the test module is connected with the input end of the power supply module, the output end of the power supply module is connected with the input end of the EPS controller, the output end of the EPS controller is connected with the input end of the test module, and the output end of the test module is connected with the input end of the upper computer module.

2. A system for testing power supply characteristics of an EPS controller as defined in claim 1, characterized in that: The test module outputs a control signal to the power supply module, the power supply module outputs test power to the EPS controller, the EPS controller outputs parameter information to the test module, and the test module outputs test information to the upper computer module.

3. A system for testing power supply characteristics of an EPS controller as defined in claim 1, wherein: The test module comprises a switch button, a single-chip microcomputer and a display screen, the switch button comprises a test module power switch button, a mode switching button and three voltage characteristic test buttons, the output ends of the power switch button, the mode switching button and the three voltage characteristic test buttons are respectively connected with the input ends of the single-chip microcomputer, and the output end of the single-chip microcomputer is connected with the input end of the display screen.

4. A system for testing power supply characteristics of an EPS controller as defined in claim 1, wherein: The power supply module comprises a program-controlled power supply and two N-type field effect tubes, the output end of the program-controlled power supply is respectively connected with the drain of the two N-type field effect tubes, and the source of the two N-type field effect tubes is respectively connected with the input end of the EPS controller.

5. A system for testing power supply characteristics of an EPS controller as defined in claim 3, wherein: The pulse width modulation output pins of the single-chip microcomputer are respectively connected with the gate of the two N-type field effect tubes.

6. A system for testing power supply characteristics of an EPS controller as defined in claim 4, wherein: The upper computer module adopts a computer, and the computer is connected with the test module through a CAN bus.

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