CN213182374U - Gate resistor program control system for IGBT test - Google Patents
Gate resistor program control system for IGBT test Download PDFInfo
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- CN213182374U CN213182374U CN202022497043.9U CN202022497043U CN213182374U CN 213182374 U CN213182374 U CN 213182374U CN 202022497043 U CN202022497043 U CN 202022497043U CN 213182374 U CN213182374 U CN 213182374U
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Abstract
The utility model discloses a gate pole resistance program control system for IGBT test for required gate pole resistance when providing the IGBT test. The system comprises an upper computer, a microcontroller, a speed reducing motor, a switch control unit and a resistance network. The upper computer is used for sending out control signals according to different instructions input by a user. The microcontroller is in communication connection with the upper computer and the speed reducing motor and is used for controlling the speed reducing motor to rotate according to control signals sent by the upper computer. The speed reducing motor is also connected with the switch control unit and is used for driving the switch control unit to act when rotating, so that the resistor network connected with the switch control unit is switched to different output loops, and gate resistors with different resistance values are further provided. Therefore, the gate resistors with different resistance values can be provided through program control, and the testing efficiency and reliability are improved.
Description
Technical Field
The utility model relates to a resistance adjustment technical field especially relates to a gate pole resistance program control system for IGBT test.
Background
The IGBT is used as a core device for energy conversion and transmission, and is widely applied in the fields of rail transit, smart grids, aerospace, electric automobiles, new energy equipment and the like. The switching characteristics of the IGBT as a semiconductor switching device will directly affect the quality of the application. Therefore, during the product development stage, the IGBT is often required to be tested to evaluate the dynamic characteristics of the IGBT. One of the common tests is to solder and remove gate on/off resistors with different resistance values from the IGBT driver to test characteristics of the IGBT such as on/off delay, on/off loss, and the like.
However, the gate resistance is manually soldered and detached, so that the efficiency is low, errors are prone to occur, and the reliability of the IGBT test is affected.
SUMMERY OF THE UTILITY MODEL
In view of this, it is necessary to provide a gate resistor program control system for IGBT testing, which can provide gate resistors with different resistance values through program control, thereby improving testing efficiency and reliability.
The utility model discloses a reach the technical scheme that above-mentioned purpose proposed as follows:
the utility model provides a gate pole resistance program control system for IGBT test for be connected with the IGBT test system electricity, required gate pole resistance when providing the IGBT test, gate pole resistance program control system for IGBT test includes host computer, microcontroller, gear motor, on-off control unit and resistance network, the host computer is used for sending corresponding control signal according to the different instruction of user input, microcontroller with host computer reaches gear motor communication connection is used for according to the control signal control that the host computer sent gear motor rotates, gear motor still with on-off control unit connects for drive on-off control unit action when rotating, so that with on-off control unit connects the resistance network switches to different output circuit, and then provides the IGBT gate pole resistance of different resistance sizes.
Furthermore, the gate resistance program control system for the IGBT test further comprises an encoder, one end of the encoder is electrically connected to the speed reducing motor, the other end of the encoder is in communication connection with the microcontroller, the encoder is used for converting the rotation angle of the speed reducing motor into a corresponding data signal and transmitting the data signal to the microcontroller, and the microcontroller controls the speed reducing motor to continue rotating or stop rotating according to the data signal and a control signal sent by the upper computer.
Further, the microcontroller is also used for judging whether the output resistance value of the resistance network is the resistance value required by the user according to the data signal transmitted by the encoder and the control signal sent by the upper computer;
if the output resistance value of the resistance network is not the resistance value required by the user, the microcontroller continuously controls the speed reducing motor to rotate so as to continuously switch the resistance network to different output loops;
if the output resistance value of the resistance network is the resistance value required by a user, the microcontroller controls the speed reducing motor to stop rotating so that the resistance network provides IGBT gate resistance according to the current output loop.
Further, the communication connection mode between the encoder and the microcontroller is electric signal communication or optical signal communication.
Further, the resistance network comprises ten output loops to respectively output resistance values of 1 Ω -10 Ω.
Further, the switch control unit comprises a coupler and a wave band switch, the coupler is connected between the speed reducing motor and the wave band switch, and the wave band switch is connected with the resistor network.
Further, the upper computer is a mobile phone or a computer.
Further, the microcontroller is a single chip microcomputer.
According to the gate pole resistance program control system for the IGBT test, the speed reducing motor, the switch control unit and the resistance network are arranged, so that the speed reducing motor is controlled to rotate to drive the switch control unit to act, and further a resistance output loop of the resistance network is switched; and judging whether the output resistance value of the resistance network meets the requirements of users or not through the rotation angle of the speed reducing motor, and controlling the speed reducing motor to rotate or stop rotating according to the judgment result, thereby realizing the purpose of accurate resistance program control. Therefore, the gate resistors with different resistance values can be provided through program control, and the testing efficiency and reliability are improved.
Drawings
Fig. 1 is a system diagram of a preferred embodiment of the gate resistance program control system for IGBT testing according to the present invention.
Fig. 2 is a block diagram of a preferred embodiment of the switch control unit of fig. 1.
Description of the main elements
Gate resistor program control system 100 for IGBT test
Switch control unit 40
IGBT test system 200
The following detailed description of the invention will be further described in conjunction with the above-identified drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the present invention provides a gate resistance program control system 100 for IGBT testing, which is electrically connected to an IGBT testing system 200 to provide a gate resistance required for the IGBT testing. The gate resistance program control system 100 for the IGBT test comprises an upper computer 10, a microcontroller 20, a speed reducing motor 30, a switch control unit 40 and a resistance network 50. The upper computer 10 is used for sending out corresponding control signals according to different instructions input by a user. The microcontroller 20 is in communication connection with the upper computer 10 and the speed reducing motor 30 and is used for controlling the speed reducing motor 30 to rotate according to a control signal sent by the upper computer 10. The decelerating motor 30 is further connected to the switch control unit 40, and is configured to drive the switch control unit 40 to operate when rotating, so that the resistor network 50 connected to the switch control unit 40 is switched to different output loops, thereby providing IGBT gate resistors with different resistance values.
In this embodiment, the gate resistance programming system 100 for IGBT testing further includes an encoder 60. One end of the encoder 60 is electrically connected to the gear motor 30, and the other end of the encoder 60 is communicatively connected to the microcontroller 20. In the present embodiment, the communication method between the encoder 60 and the microcontroller 20 is electrical signal communication, and in other embodiments, the communication method between the encoder 60 and the microcontroller 20 may be optical signal communication or sound signal communication. The encoder 60 is configured to convert the rotation angle of the reduction motor 30 into a corresponding data signal, and transmit the data signal to the microcontroller 20. The microcontroller 20 controls the reduction motor 30 to continue rotating or stop rotating according to the data signal and the control signal sent by the upper computer 10.
Specifically, the microcontroller 20 determines whether the output resistance value of the resistance network 50 is the resistance value required by the user according to the data signal transmitted by the encoder 60 and the control signal sent by the upper computer 10.
If the output resistance value of the resistor network 50 is not the user-desired resistance value, the microcontroller 20 will continue to control the rotation of the speed reducing motor 30, so that the resistor network 50 continues to switch to a different output loop.
If the output resistance value of the resistor network 50 is the resistance value required by the user, the microcontroller 20 controls the decelerating motor 30 to stop rotating, so that the resistor network 50 provides the IGBT gate resistance according to the current output loop.
In this embodiment, the upper computer 10 is a mobile phone or a computer.
In this embodiment, the microcontroller 20 is a single chip microcomputer, and in other embodiments, the microcontroller 20 may also be a control chip such as a CPLD or an FPGA.
In the present embodiment, the resistor network 50 includes ten output circuits to respectively correspond to output resistance values of 1 Ω to 10 Ω. It should be noted that the number of output loops included in the resistor network 50 and the corresponding resistance value are not limited, and in other embodiments, the number of output loops may be adjusted according to actual requirements.
Referring to fig. 2, in the present embodiment, the switch control unit 40 includes a coupler 42 and a band switch 44 connected to the coupler 42. The coupling 42 is used for connecting with the speed reducing motor 30. The band switch 44 is adapted to be connected to the resistor network 50. The coupling 42 is used for transmitting the kinetic energy of the speed reducing motor 30, so that the band switch 44 rotates along with the kinetic energy, and the purpose of switching the output circuit of the resistor network 50 is achieved.
For example, when the rotation angle of the speed reducing motor 30 is 36 degrees, the band switch 44 is correspondingly switched to the output circuit of the resistor network 50 once, and the output resistance value is 1 Ω; when the rotation angle of the speed reducing motor 30 is 72 degrees, the band switch 44 switches the output loop of the resistor network 50 once again, and the output resistance value is 2 Ω, and so on, and with the continuous rotation of the speed reducing motor 30, the band switch 44 continuously switches the output loop of the resistor network 50, so as to continuously change the output resistance until the output resistance reaches the resistance value required by the user.
Therefore, the utility model discloses only need through host computer 10 input corresponding instruction, just can be automatically do IGBT test system provides different gate pole resistance, has greatly improved IGBT's efficiency of software testing and reliability.
The gate resistance program control system 100 for the IGBT test is provided with the reducing motor 30, the switch control unit 40 and the resistance network 50, so that the reducing motor 30 is controlled to rotate to drive the switch control unit 40 to act, and further, a resistance output loop of the resistance network 50 is switched; whether the output resistance value of the resistance network 50 meets the requirement of a user is judged through the rotation angle of the speed reducing motor 30, and the rotation or the stop of the speed reducing motor 30 is controlled according to the judgment result, so that the aim of accurately controlling the resistance program is fulfilled. Therefore, the gate resistors with different resistance values can be provided through program control, and the testing efficiency and reliability are improved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A gate resistance program control system for IGBT test is used to connect with IGBT test system to provide gate resistance needed by IGBT test, it is characterized in that the gate resistance program control system for IGBT test comprises an upper computer, a microcontroller, a speed reducing motor, a switch control unit and a resistance network, the upper computer is used for sending out corresponding control signals according to different instructions input by a user, the microcontroller is in communication connection with the upper computer and the speed reducing motor, used for controlling the speed reducing motor to rotate according to the control signal sent by the upper computer, the speed reducing motor is also connected with the switch control unit, the circuit is used for driving the switch control unit to act during rotation so that the resistor network connected with the switch control unit is switched to different output loops, and IGBT gate resistors with different resistance values are further provided.
2. The gate resistance program control system for the IGBT test according to claim 1, further comprising an encoder, wherein one end of the encoder is electrically connected to the geared motor, the other end of the encoder is in communication with the microcontroller, the encoder is configured to convert a rotation angle of the geared motor into a corresponding data signal and transmit the data signal to the microcontroller, and the microcontroller controls the geared motor to continue to rotate or stop rotating according to the data signal and a control signal sent by the upper computer.
3. The gate resistance program control system for the IGBT test according to claim 2, wherein the microcontroller is further configured to determine whether the output resistance value of the resistance network is a resistance value required by a user according to the data signal transmitted by the encoder and the control signal sent by the upper computer;
if the output resistance value of the resistance network is not the resistance value required by the user, the microcontroller continuously controls the speed reducing motor to rotate so as to continuously switch the resistance network to different output loops;
if the output resistance value of the resistance network is the resistance value required by a user, the microcontroller controls the speed reducing motor to stop rotating so that the resistance network provides IGBT gate resistance according to the current output loop.
4. The gate resistance programming system for the IGBT test according to claim 2, wherein the communication connection between the encoder and the microcontroller is an electrical signal communication or an optical signal communication.
5. The gate resistance programming system for the IGBT test according to claim 1, wherein the resistance network includes ten output loops to respectively output resistance values of 1 Ω to 10 Ω.
6. The gate resistance program control system for IGBT testing according to claim 1, wherein the switch control unit includes a coupler and a band switch, the coupler is connected between the reduction motor and the band switch, and the band switch is connected to the resistance network.
7. The gate resistance program control system for the IGBT test as claimed in claim 1, wherein the upper computer is a mobile phone or a computer.
8. The gate resistance programming system for IGBT testing of claim 1, wherein the microcontroller is a single chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022497043.9U CN213182374U (en) | 2020-11-02 | 2020-11-02 | Gate resistor program control system for IGBT test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022497043.9U CN213182374U (en) | 2020-11-02 | 2020-11-02 | Gate resistor program control system for IGBT test |
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| Publication Number | Publication Date |
|---|---|
| CN213182374U true CN213182374U (en) | 2021-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022497043.9U Active CN213182374U (en) | 2020-11-02 | 2020-11-02 | Gate resistor program control system for IGBT test |
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| CN (1) | CN213182374U (en) |
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- 2020-11-02 CN CN202022497043.9U patent/CN213182374U/en active Active
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