Power supply module interface test equipment

Abstract

The utility model discloses a power supply module interface test device, and relates to the technical field of test. Comprising a signal simulation device, an interface adapter and a programmable power supply and load module, the interface adapter is connected with the signal simulation device through a test cable, and the programmable power supply and load module is connected with the signal simulation device through a power supply load control cable; the signal simulation equipment provides control resources for switching electrical loops of the programmable power supply and the load module and also provides resources for voltage monitoring of the programmable power supply and the load module, and the interface adapter provides a power supply loop interface, a load loop interface and a signal monitoring loop interface; according to the utility model, the batch test of the power supply module interface in the design verification and production inspection stages can be realized.

Description

Technical Field

[0001] This utility model relates to the field of testing technology, specifically to a power module interface testing device. Background Technology

[0002] When performing interface testing on power module boards, it is necessary not only to test the power module itself, but also to provide the required operating power to the device under test and to test the maximum power of the device under test. In order to meet the single-board testing requirements during design and production, a portable integrated testing device needs to be designed to complete the interface testing of power module boards. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a power module interface testing device.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A power module interface testing device includes a signal simulation device, an interface adapter, and a programmable power supply and load module. The interface adapter is connected to the signal simulation device via a test cable, and the programmable power supply and load module is connected to the signal simulation device via a power load control cable.

[0006] The signal simulation equipment includes a chassis, functional modules, and electrical switching relays. The interface adapter includes a signal adapter and a UUT interface bracket. The functional modules are located inside the chassis and include PXI module components. The PXI module components include a PXI controller, a serial communication module, a 5A switch module, and an AD acquisition module mounted on the PXI backplane. The electrical switching relays are located inside the chassis and are used to switch between single power supplies and loads.

[0007] The signal simulation equipment also includes an interface module, including a power supply interface, a load interface, and a signal monitoring interface. The power supply interface includes a power input interface, a power output interface, and a power control interface. The load interface includes a load input interface, a load output interface, and a load control interface. The power input interface, the power output interface, the load input interface, and the load output interface are all connected to an electrical switching relay. The signal monitoring interface is connected to the AD acquisition module. The power control interface and the load control interface are both connected to a serial communication module.

[0008] The interface adapter includes a power supply circuit interface, a load circuit interface, and a signal monitoring circuit interface. The power supply circuit interface is connected to the power supply interface, the load circuit interface is connected to the load interface, and the signal monitoring circuit interface is connected to the signal monitoring interface.

[0009] Furthermore, the signal simulation device also includes a human-machine interface module located outside the chassis, including a display, mouse, and keyboard, which is connected to the PXI controller to provide a human-machine interface for the operator.

[0010] Furthermore, the programmable power supply and load module includes a power supply module and a load module. The power supply module is selected as model IT-6942A, and the load module is selected as model IT-8512C programmable DC electronic load.

[0011] Furthermore, the signal adapter of the interface adapter also includes a data acquisition circuit, a primary voltage and current conditioning circuit, a secondary voltage conditioning circuit, and a power supply control circuit, providing control and secondary voltage regulation functions for the UUT power supply.

[0012] The beneficial effects of this utility model are:

[0013] This equipment provides the following functions: it can test power modules; it can provide the required operating power to the device under test (DUT); and it can test the maximum power of the DUT. Testing functions include: power supply interface testing, electronic load interface testing, and interface testing. Attached Figure Description

[0014] Figure 1 A connection block diagram showing the interface testing equipment for the power module;

[0015] Figure 2 This is a schematic diagram of the power module test function.

[0016] Figure 3 This is a schematic diagram of the electrical switching relay control principle.

[0017] Figure 4 This is a block diagram illustrating the functional principle of a power module signal simulation device. Detailed Implementation

[0018] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] See Figures 1-4 This utility model provides a technical solution:

[0020] A power module interface testing device, such as Figure 1The system includes a signal simulation device, an interface adapter, and a programmable power supply and load module. The interface adapter is connected to the signal simulation device via a test cable, and the programmable power supply and load module are connected to the signal simulation device via a power load control cable.

[0021] The signal simulation equipment includes a chassis, functional modules, and electrical switching relays. The interface adapter includes a signal adapter and a UUT interface bracket. The functional modules are located inside the chassis and include PXI module components. The PXI module components include a PXI controller, a serial communication module, a 5A switch module, and an AD acquisition module mounted on the PXI backplane. The electrical switching relays are located inside the chassis and are used to switch between single power supplies and loads.

[0022] The signal simulation equipment also includes an interface module, including a power supply interface, a load interface, and a signal monitoring interface. The power supply interface includes a power input interface, a power output interface, and a power control interface. The load interface includes a load input interface, a load output interface, and a load control interface. The power input interface, the power output interface, the load input interface, and the load output interface are all connected to an electrical switching relay. The signal monitoring interface is connected to the AD acquisition module. The power control interface and the load control interface are both connected to a serial communication module.

[0023] The schematic diagram of the power module test function is as follows: Figure 2 As shown, the control schematic of the electrical switching relay is as follows: Figure 3 As shown.

[0024] The interface adapter includes a power supply loop interface, a load loop interface, and a signal monitoring loop interface. The power supply loop interface connects to the power supply interface, the load loop interface connects to the load interface, and the signal monitoring loop interface connects to the signal monitoring interface. The interface selection of the interface adapter is shown in Table 1 below:

[0025]

[0026] In some embodiments, the PXI controller uses the PXI-2010 module, whose main functions include: a) controlling, managing, and scheduling the normal operation of each PXI module; b) executing test procedures; and c) providing one LAN interface, one RS232 interface, and two USB interfaces. The serial communication module uses an 8-channel PXI-4031 module, whose functions include: configuring external power supply operating parameters and reading the external power supply operating status; configuring external load operating parameters and reading the external load operating status. The main performance indicators of the 8-channel serial communication module are as follows:

[0027] 1) Number of channels: 8;

[0028] 2) Communication Protocol: Supports RS422 and RS232 protocols;

[0029] 3) Word length, stop bits, parity bits, and baud rate are configurable;

[0030] 4) Self-test and loopback functions;

[0031] 5) Each channel transmits 128 FIFO bytes and receives 256 FIFO bytes;

[0032] 6) Mechanical characteristics: 3U, 1 slot wide;

[0033] 7) Driver support: Win 7 32 / 64.

[0034] The functional principle block diagram of the power module signal simulation device is as follows: Figure 4 As shown, the functions of each module in the PXI module component are summarized in Table 2 below:

[0035]

[0036] In some embodiments, the signal simulation device further includes a human-machine interface module located outside the chassis, including a display, mouse and keyboard, connected to the PXI controller, to provide a human-machine interface for operators.

[0037] Furthermore, the programmable power supply and load module includes a power supply module and a load module. The power supply module is selected as model IT-6942A, and the load module is selected as model IT-8512C programmable DC electronic load.

[0038] The IT-6942A power supply can simultaneously meet the power requirements of two input interfaces (240W), and its performance characteristics are as follows:

[0039] 1) High-visibility vacuum fluorescent display (VFD);

[0040] 2) Voltage and current can be adjusted using a numeric keypad or knob;

[0041] 3) The cursor can be used to adjust the numerical step value;

[0042] 4) High accuracy and high resolution;

[0043] 5) It can output voltage and current values ​​according to the programmed parameters;

[0044] 6) The timer output time can be set (0.1~99999.9 seconds);

[0045] 7) Low ripple and low noise;

[0046] 8) Intelligent fan control saves energy and reduces noise;

[0047] 9) Standard configuration includes RS232 / USB / GPIB communication interfaces;

[0048] 10) Software monitoring can be performed via computer;

[0049] 11) It has a rich set of SCPI commands, making it easy to build an intelligent testing platform;

[0050] 12) It has overvoltage, overcurrent and overheat protection functions.

[0051] The IT-8512C's programmable DC electronic load has a single-channel power of no less than 300W and a load current of no less than 50A; it also features constant current, constant resistance, and constant power discharge modes. Its performance characteristics are as follows:

[0052] 1) Specific battery testing, automatic testing, OCP testing and OPP testing modes, testing can be performed as soon as the device is turned on;

[0053] 2) High-visibility vacuum fluorescent display (VFD);

[0054] 3) Dynamic mode up to 10kHz;

[0055] 4) Voltage measurement resolution up to 0.1mV and current resolution up to 0.1mA;

[0056] 5) Voltage and current measurement speed can reach up to 40KHz;

[0057] 6) Four operating modes: constant voltage, constant current, constant resistance, and constant power;

[0058] 7) Uses a rotary encoder switch, making operation quick and easy;

[0059] 8) Remote measurement function;

[0060] 9) Battery test function;

[0061] 10) Overcurrent test function;

[0062] 11) Over-power test function;

[0063] 12) Automatic testing function;

[0064] 13) Memory capacity: 100 sets;

[0065] 14) Short-circuit function;

[0066] 15) Dynamic testing function;

[0067] 16) Portable rugged chassis equipped with anti-slip feet;

[0068] 17) Intelligent fan control;

[0069] 18) Built-in Buzzer for warning notifications;

[0070] 19) Memory function is retained even when power is off.

[0071] In this embodiment, as Figure 4 The interface adapter shown also includes a data acquisition circuit, a primary voltage and current conditioning circuit, a secondary voltage conditioning circuit, and a power supply control circuit, providing control and secondary voltage regulation functions for the UUT power supply. The interface adapter is used in the design verification and testing phase of the power module. The power supply circuit is designed for 8A current, and 1mm² or AWG 16# wire is planned to be used; the main load power circuit is designed for 50A current, and 3mm² or AWG 12# wire is planned to be used in parallel. The wire connected to the simulation module monitoring end has no current requirement and is considered to be 0.35mm² or AWG 22# wire.

[0072] This invention not only tests power modules but also provides the necessary operating power to the device under test (DUT) and tests its maximum power. The testing functions include: power supply interface testing, electronic load interface testing, and interface testing. The power supply interface testing has two channels, with a voltage adjustable from 10V to 32V, a testing accuracy of ±0.5VDC, and a power rating of 120W. The electronic load interface testing has one channel, switchable to five channels, and can be set to constant resistance, constant current, and constant power loads; the power can be set from 0W to 300W; the current from 0A to 50A; and the resistance from 0Ω to 1KΩ. The interface testing can control the start-up time of each electronic load with a control accuracy of 1ms, and can acquire the voltage of each load interface and display it as a curve.

[0073] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A power module interface test apparatus, characterized by: The signal simulation device comprises a case, a function module and an electrical switching relay, the interface adapter comprises a signal adapter and a UUT interface support, the function module is located inside the case and comprises a PXI module assembly, the PXI module assembly comprises a PXI controller, a serial communication module, a 5A switch module and an AD acquisition module which are installed on a PXI backplane, and the electrical switching relay is located inside the case and is used for switching a single power supply and load. The signal simulation device further comprises an interface module, which comprises a power supply interface, a load interface and a signal monitoring interface, the power supply interface comprises a power supply input interface, a power supply output interface and a power supply control interface, the load interface comprises a load input interface, a load output interface and a load control interface, the power supply input interface, the power supply output interface, the load input interface and the load output interface are connected with the electrical switching relay, the signal monitoring interface is connected with the AD acquisition module, and the power supply control interface and the load control interface are connected with the serial communication module. The interface adapter comprises a power supply loop interface, a load loop interface and a signal monitoring loop interface, the power supply loop interface is connected with the power supply interface, the load loop interface is connected with the load interface, and the signal monitoring loop interface is connected with the signal monitoring interface. The signal simulation device further comprises a man-machine interaction module located outside the case, which comprises a display, a mouse and a keyboard and is connected with the PXI controller to provide a man-machine interaction interface for an operator.

2. A power module interface test apparatus according to claim 1, characterised in that: The program-controlled power supply and load module comprises a power supply module and a load module, the power supply module is selected from an IT-6942A type, and the load module is selected from an IT-8512C type program-controlled direct current electronic load.

3. A power module interface test apparatus according to claim 1, wherein: The signal adapter of the interface adapter further comprises an acquisition circuit, a primary voltage and current conditioning circuit, a secondary voltage conditioning circuit and a power supply control circuit to provide control and secondary voltage regulation functions for a UUT power supply.

4. The power module interface test apparatus of claim 1, wherein: ​

Images