80V surge voltage electrical performance test tool

Abstract

The utility model discloses a 80V surge voltage electrical performance test tool, which comprises a test circuit board, and also comprises a banana socket terminal unit, a voltage switching unit, a power switch unit and a signal control unit which are arranged on the test circuit board, wherein the banana socket terminal unit is used for connecting external test equipment and a tested power supply module; the voltage switching unit is used for realizing switching between 28V voltage and 80V surge voltage; the power switch unit is used for switching on and switching off 80V surge voltage; and the signal control conversion unit controls the conduction time of the MOSFET of the power switch unit according to an external signal transmitter. The surge voltage testing device is convenient to operate, low in loss and easy to control, can realize frequent switching between 28V surge voltage and 80V surge voltage, provides guarantee for surge voltage testing of the power supply module, simplifies a surge voltage testing method of the power supply module, improves production testing efficiency of the power supply module, and is wide in application range.

Description

Technical Field

[0001] The utility model relates to the technical field of surge voltage testing, in particular to an electrical performance testing tool for an 80V surge voltage. Background Art

[0002] During the 80V surge voltage test of the power module, a common cathode diode is usually used to switch between 28V and 80V of the tested power module. This method is simple and easy to implement, but there are also some problems. For example, the 80V power-on time cannot be controlled, which can easily cause the power module to burn out during the test, and the test efficiency is low, making it unsuitable for mass production operations. Summary of the invention

[0003] The utility model aims to provide an 80V surge voltage test tool to solve at least one problem existing in the prior art.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model includes:

[0005] A 80V surge voltage electrical performance test tool comprises a test circuit board, and also comprises a banana socket terminal unit, a voltage switching unit, a power switch unit, and a signal control unit installed on the test circuit board; wherein the banana socket terminal unit is used to connect an external test device and a power module under test; the voltage switching unit is used to realize switching between a 28V voltage and an 80V surge voltage; the power switch unit realizes turning on and off the 80V surge voltage; and the signal control unit realizes the on-time control of the MOSFET of the power switch unit according to an external signal transmitter.

[0006] The utility model also includes the following other technical features:

[0007] A supporting screw is respectively arranged on the four corners of the test circuit board.

[0008] The external test equipment includes a 28V DC power supply, an 80V DC power supply and a signal transmitter.

[0009] The test circuit board is an epoxy printed circuit board.

[0010] The banana socket terminal unit is composed of banana socket terminals J1, J2, J3, J4, and J5 welded through an epoxy printed circuit board, wherein J1 and J5 are respectively connected to the "+" and "-" of the power module under test; J2 and J5 are respectively connected to the "+" and "-" of the 28V DC power supply; J3 and J5 are respectively connected to the "+" and "-" of the external 80V DC power supply; J4 and J5 are respectively connected to the "+" and "-" of the signal transmitter device.

[0011] The voltage switching unit is formed by welding a common cathode diode D3 through an epoxy printed circuit board, wherein the three pins of the common cathode diode D3 are commonly connected to the banana socket terminal J1, and the one pin of the common cathode diode D3 is connected to the banana socket terminal J2.

[0012] The power switch unit is composed of a transient diode D1, a 10V voltage regulator D2, a voltage divider resistor R1, a voltage divider resistor R2, and a power switch Q1 welded through an epoxy printed circuit board, wherein a banana socket terminal J3 is simultaneously connected to the cathode of the transient diode D1, the cathode of the 10V voltage regulator D2, one end of the voltage divider resistor R1, and the D pole of the power switch Q1; the anode of the 10V voltage regulator D2, the other end of the voltage divider resistor R1, one end of the voltage divider resistor R2, and the G pole of the power switch Q1 are simultaneously connected, and the S pole of the power switch Q1 is connected to the 2nd foot of the common cathode diode D3.

[0013] The signal control unit is composed of a voltage-dividing resistor R4 and a voltage-dividing resistor R3, a filter capacitor C1, and an NPN control transistor Q2 welded through an epoxy printed circuit board, wherein one end of the voltage-dividing resistor R4 is connected to the banana socket terminal J4, and the other end of the voltage-dividing resistor R4, one end of the filter capacitor C1, one end of the voltage-dividing resistor R3, and the base of the NPN control transistor Q2 are connected simultaneously; the banana socket terminal J5, the other end of the transient diode D1, the other end of the filter capacitor C1, the other end of the voltage-dividing resistor R3, and the emitter of the NPN control transistor Q2 are connected simultaneously; and the collector of the NPN control transistor Q2 is connected to the other end of the voltage-dividing resistor R2.

[0014] Compared with the prior art, the advantages of the present invention are as follows:

[0015] The utility model 80V surge voltage test tool is formed by connecting banana socket terminals, common cathode diodes, transient diodes, 10V voltage regulators, voltage divider resistors, power switch tubes, filter capacitors, and NPN control transistors through epoxy printed circuit board wiring. The banana socket realizes connection with external devices and the power module under test, the common cathode diode realizes the voltage switching between 28V and 80V of the 80V surge voltage test tool, the N-channel MOSFET realizes the opening and closing of the 80V surge voltage, and the NPN control transistor realizes the conduction and closing of the NPN control transistor through an external signal transmitter to control the conduction time control of the power switch MOSFET.

[0016] By setting the cycle time of the external signal transmitter, the conduction and shutdown of the NPN control transistor can be effectively controlled to control the on-time control of the power switch MOSFET, which can realize the switching between 28V voltage and 80V voltage. The switching time is controllable, providing simulated surge voltage test conditions for the power module under test, simplifying the surge voltage test method of the power module, improving the production test efficiency of the power module, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a wiring diagram of the utility model.

[0018] The symbols in the figure represent:

[0019] 1-Banana socket terminal unit; 2-Voltage switching unit; 3-Power switch unit; 4-Signal control unit. DETAILED DESCRIPTION

[0020] like Figure 1 As shown, the 80V surge voltage electrical performance test tool provided by the utility model includes a test circuit board, and a banana socket terminal unit, a voltage switching unit, a power switch unit, and a signal control unit installed on the test circuit board. Among them, the banana socket terminal unit is used to connect the external test equipment and the power module under test; the voltage switching unit is used to realize the switching between 28V voltage and 80V voltage, and provide simulated surge voltage test conditions for the power module under test; the power switch unit is used to realize the opening and closing of the 80V voltage; the signal control unit is used to realize the control of the conduction and shutdown of the transistor to control the conduction time control of the power switch MOSFET.

[0021] Preferably, a supporting screw is respectively provided on the four corners of the test circuit board for supporting the entire test circuit board.

[0022] The external test equipment includes two DC test power supplies (providing working voltage for the 80V surge voltage test tooling) and a signal transmitter (providing on-time control for the 80V surge voltage test tooling).

[0023] Embodiment 1:

[0024] In this embodiment: the test circuit board adopts an epoxy printed circuit board with a size of 80mm×80mm×2.5mm.

[0025] Banana socket terminal unit 1 is composed of 4mm banana socket terminals J1, J2, J3, J4, and J5, model JS-910B, four red ones and one black one.

[0026] The support screw adopts M3*30+8 male and female studs.

[0027] The components in this embodiment function as follows:

[0028] Banana socket terminals J2 and J5 are used to connect an external 28V DC power supply device to an 80V surge voltage test fixture (J2 is connected to the external 28V DC power supply device "+", and J5 is connected to the external 28V DC power supply device "-"), thereby providing a 28V working voltage for the 80V surge voltage test fixture (DC power supply device specifications require: output voltage range 0V~100V adjustable, current 0A~20A adjustable);

[0029] Banana socket terminals J3 and J5 are used to connect an external 80V DC power supply device to an 80V surge voltage test fixture (J3 is connected to the external 80V DC power supply device "+", and J5 is connected to the external 80V DC power supply device "-"), thereby providing an 80V working voltage for the 80V surge voltage test fixture (DC power supply device specifications require: output voltage range 0V~100V adjustable, current 0A~20A adjustable);

[0030] Banana socket terminals J4 and J5 are used to connect the signal transmitter to the 80V surge voltage test fixture (J4 is connected to the signal transmitter device "+", and J5 is connected to the signal transmitter device "-"), thereby providing time cycle control for the 80V surge voltage test fixture and effectively controlling the conduction and shutdown of the NPN transistor Q2 (signal transmitter equipment specification requirements: 100MHz, 500MSa / s);

[0031] J1 and J5 are used to connect to the power module under test (J1 is connected to the "+" of the power module under test, and J5 is connected to the "-" of the power module under test), so as to provide the power module under test with a working voltage of 28V to 80V (specifications of the power module under test: any power module that needs to test the switching of the surge voltage from 28V to 80V can use this tool for testing);

[0032] Using the test tool of the utility model, the specific operations are as follows:

[0033] (1) The external test equipment (including DC power supply equipment, signal transmitter, and power module under test) are connected to the 80V surge voltage test tooling through banana sockets;

[0034] (2) The signal transmitter is set to a time cycle control of 80ms;

[0035] (3) Connect the power module under test to the 80V surge voltage test fixture according to the pin marking position (J1 connects the "+" of the power module under test, and J5 connects the "-" of the power module under test);

[0036] (4) Press the power switches of the two DC power supply devices to start providing working voltage to the 80 V surge voltage test tooling. The power module under test starts the surge voltage test. After the test is completed, turn off the power switch. After the test is completed, replace the next power module under test.

Claims

1. An 80V surge voltage electrical performance test tool, including a test circuit board, characterized in that: It also includes a banana socket terminal unit, a voltage switching unit, a power switch unit, and a signal control unit installed on the test circuit board; wherein the banana socket terminal unit is used to connect an external test device and a power module under test; the voltage switching unit is used to switch between a 28V voltage and an 80V surge voltage; the power switch unit turns on and off the 80V surge voltage; and the signal control unit controls the on-time of the MOSFET of the power switch unit according to an external signal transmitter.

2. The 80V surge voltage electrical performance test tool as claimed in claim 1, characterized in that: A supporting screw is respectively arranged on the four corners of the test circuit board.

3. The 80V surge voltage electrical performance test tool as claimed in claim 1, characterized in that: The external test equipment includes a 28V DC power supply, an 80V DC power supply and a signal transmitter.

4. The 80V surge voltage electrical performance test tool as described in any one of claims 1 to 3, characterized in that: The test circuit board is an epoxy printed circuit board.

5. The 80V surge voltage electrical performance test tool as described in any one of claims 1 to 3, characterized in that: The banana socket terminal unit (1) is composed of banana socket terminals J1, J2, J3, J4, and J5 welded via an epoxy printed circuit board, wherein J1 and J5 are respectively connected to the "+" and "-" of the power module under test; J2 and J5 are respectively connected to the "+" and "-" of a 28V DC power supply; J3 and J5 are respectively connected to the "+" and "-" of an external 80V DC power supply; and J4 and J5 are respectively connected to the "+" and "-" of a signal transmitter device.

6. The 80V surge voltage electrical performance test tool as claimed in claim 5, characterized in that: The voltage switching unit (2) is composed of a common cathode diode D3 welded via an epoxy printed circuit board, wherein three pins of the common cathode diode D3 are commonly connected to a banana socket terminal J1, and one pin of the common cathode diode D3 is connected to a banana socket terminal J2.

7. The 80V surge voltage electrical performance test tool as claimed in claim 6, characterized in that: The power switch unit (3) is composed of a transient diode D1, a 10V voltage regulator tube D2, a voltage divider resistor R1, a voltage divider resistor R2, and a power switch tube Q1, which are welded via an epoxy printed circuit board, wherein a banana socket terminal J3 is simultaneously connected to the cathode of the transient diode D1, the cathode of the 10V voltage regulator tube D2, one end of the voltage divider resistor R1, and the D pole of the power switch tube Q1; the anode of the 10V voltage regulator tube D2, the other end of the voltage divider resistor R1, one end of the voltage divider resistor R2, and the G pole of the power switch tube Q1 are simultaneously connected, and the S pole of the power switch tube Q1 is connected to the 2nd pin of the common cathode diode D3.

8. The 80V surge voltage electrical performance test tool as claimed in claim 7, characterized in that: The signal control unit (4) is composed of a voltage-dividing resistor R4 and a voltage-dividing resistor R3, a filter capacitor C1, and an NPN control transistor Q2 welded together through an epoxy printed circuit board, wherein one end of the voltage-dividing resistor R4 is connected to a banana socket terminal J4, and the other end of the voltage-dividing resistor R4, one end of the filter capacitor C1, one end of the voltage-dividing resistor R3, and the base of the NPN control transistor Q2 are simultaneously connected; the banana socket terminal J5, the other end of the transient diode D1, the other end of the filter capacitor C1, the other end of the voltage-dividing resistor R3, and the emitter of the NPN control transistor Q2 are simultaneously connected; and the collector of the NPN control transistor Q2 is connected to the other end of the voltage-dividing resistor R2.

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