IGBT driving power supply and detection system and detection method thereof

Abstract

The application discloses an IGBT driving power supply and a detection system and a detection method thereof, and belongs to the technical field of power supply detection.The detection system comprises a voltage detection module, a logic gate combination module and an LED state indication module.The voltage detection module comprises a positive voltage detection unit and a negative voltage detection unit, and is used for detecting whether the positive output voltage and the negative output voltage of the IGBT driving power supply are within a set normal voltage range.The logic gate combination module is connected with the output end of the voltage detection module, and outputs a high-level signal when the positive output voltage and the negative output voltage are both within the set normal voltage range.The LED state indication module is connected with the output end of the logic gate combination module, and is lit when the logic gate combination module outputs the high-level signal, otherwise, the LED state indication module is not lit.The application improves detection accuracy, enhances troubleshooting efficiency, reduces hardware cost, is easy to integrate and maintain, and supports intelligent control.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power electronics, and more particularly relates to an IGBT driving power supply and a detection system and method thereof. BACKGROUND

[0002] In the power electronic system, the insulated gate bipolar transistor (IGBT) as the core power device is widely used in frequency converters, motor drives, inverters and other equipment. The stability of the driving power supply has a decisive influence on the working state of the IGBT and the reliability of the system operation. However, the current mainstream IGBT driving power supply detection method has many limitations, especially in the laboratory trial stage, a series of practical problems are exposed, including but not limited to:

[0003] It is impossible to realize positive and negative voltage synchronous detection: the traditional detection method can only detect single-sided voltage, and cannot judge whether the driving power supply is complete, which is easy to cause misjudgment. For example, the existing detection scheme can usually only detect positive voltage (such as +17V), and ignores the existence of negative voltage (such as -7V). When the negative voltage is missing, even if the positive voltage is normal, it may still cause the IGBT to work abnormally, and even cause a hardware overcurrent fault. High false positive rate: due to the lack of comprehensive judgment mechanism for the state of the driving power supply, in actual testing, the phenomenon of "no overcurrent but overcurrent report" may occur, which seriously affects the debugging efficiency and system stability. Low troubleshooting efficiency: in a system in which multiple driving power supplies work in parallel, if an abnormality occurs in a power supply, the abnormal power supply cannot be quickly located, and it is necessary to check each power supply one by one, which increases the debugging time and affects the research and development progress. Complex circuit, high cost: some existing detection schemes rely on special ICs or complex sensor networks, resulting in complex system design, high cost and high maintenance difficulty, which is difficult to promote on a large scale.

[0004] The solution in the prior art, for example but not limited to, provides a negative pressure detection circuit which realizes zero static power consumption through an enabling module and a logic control signal, and utilizes a voltage division comparison structure and a Schmidt trigger and an inverter shaping output to improve the anti-interference capability; but it is single in function, lacks the cooperative judgment of the positive voltage and the effective linkage with the main control system, and is difficult to comprehensively evaluate the IGBT driving power supply state in actual application and is limited in integrated application. The prior art document also discloses a power supply voltage detection circuit for bus isolation, which realizes double detection of software and hardware through a micro control unit, a voltage comparator and a logic gate circuit, controls the target integrated circuit to be isolated from the bus when the power supply is abnormal, and prevents fault propagation. But its detection object is the system main power supply voltage, not the IGBT driving power supply state, cannot identify the false overcurrent problem caused by the driving power supply fault, and depends on the MCU for voltage detection, so there is a risk of detection failure caused by power supply failure. The solution of the prior art document also includes an IGBT detection circuit and a protection circuit, which collects the IGBT collector current through a sampling resistor, transmits it through an optical coupling isolation, compares and judges the overcurrent or short circuit fault by a logic unit, and triggers a soft shutdown mechanism to realize real-time monitoring and reliable protection of the IGBT. But it depends on the main circuit detection and lacks independent monitoring of the driving power supply itself, so it cannot identify the driving power supply fault and may cause false alarm. SUMMARY

[0005] To solve the problems in the prior art, the present application provides an IGBT driving power supply and its detection system and method, which can detect the positive and negative voltages of the IGBT driving power supply at the same time, has fast identification capability, is convenient for integration, and is low in cost.

[0006] The present application adopts the following technical solutions.

[0007] The first aspect of the present application provides a detection system of an IGBT driving power supply, which comprises a voltage detection module, a logic gate combination module and an LED state indication module.

[0008] The voltage detection module comprises a positive voltage detection unit and a negative voltage detection unit, the positive voltage detection unit is used to detect whether the positive output voltage of the IGBT driving power supply is greater than or equal to the set normal positive voltage based on a first resistance voltage division network and a first voltage comparator, and the negative voltage detection unit is used to detect whether the negative output voltage of the IGBT driving power supply is less than or equal to the set normal negative voltage based on a second resistance voltage division network and a second voltage comparator;

[0009] The logic gate combination module is connected with the positive voltage detection unit output end and the negative voltage detection unit output end of the voltage detection module, and outputs a high level signal when the positive output voltage is greater than or equal to the set normal positive voltage and the negative output voltage is less than or equal to the set normal negative voltage.

[0010] The LED state indication module is connected to the output end of the logic gate combination module, and the LED state indication module is lit when the logic gate combination module outputs a high level signal, otherwise it is not lit.

[0011] Preferably, the first resistance voltage dividing network comprises a first series resistance and a second series resistance, the positive voltage output end of the IGBT drive power supply is connected to the second series resistance, and the first series resistance is connected in series to the ground, the non-inverting input end of the first voltage comparator is connected to the connection node of the second series resistance and the first series resistance, and the inverting input end is connected to a first reference voltage source outputting a set first reference voltage;

[0012] The second resistance voltage dividing network comprises a third series resistance and a fourth series resistance, the negative voltage output end of the IGBT drive power supply is connected to the fourth series resistance, and the third series resistance is connected in series to the ground, the non-inverting input end of the second voltage comparator is connected to the connection node of the fourth series resistance and the third series resistance, and the inverting input end is connected to a second reference voltage source outputting a set second reference voltage.

[0013] Preferably, when the positive output voltage is greater than or equal to a set normal positive voltage, the voltage input to the first voltage comparator through the first resistance voltage dividing network is greater than the first reference voltage, and the first voltage comparator outputs a high level signal.

[0014] When the negative output voltage is less than or equal to a set normal negative voltage, the voltage input to the second voltage comparator through the second resistance voltage dividing network is less than the second reference voltage, and the second voltage comparator outputs a high level signal.

[0015] Preferably, the logic gate combination module comprises an AND gate.

[0016] The AND gate is connected to the output ends of the first voltage comparator and the second voltage comparator, and the output end of the AND gate outputs a high level signal when the first voltage comparator and the second voltage comparator both output high level signals.

[0017] Preferably, the LED state indication module comprises a current limiting resistor R5 and an LED, the current limiting resistor R5 is connected in series with the LED, one end of the current limiting resistor R5 is connected to the output end of the AND gate, the output signal of the AND gate is connected to the anode of the LED through the current limiting resistor R5, and the cathode of the LED is grounded, the LED is lit when the AND gate outputs a high level, otherwise the LED is extinguished.

[0018] Preferably, the detection system of the IGBT drive power supply further comprises a master control linkage feedback module.

[0019] The master linkage feedback module is connected with the output end of the logic gate combination module, and converts the output signal of the logic gate combination module into a standard level signal for data acquisition, fault alarm and monitoring.

[0020] The master linkage feedback module comprises a level conversion circuit and a master control unit.

[0021] The output signal of the logic gate combination module is converted into a voltage that can be accepted by the master control unit through the level conversion circuit, and is connected to the GPIO pin of the master control unit, and the master control unit reads the output signal of the logic gate combination module through the voltage, and operates according to the set logic.

[0022] Preferably, the detection system of the IGBT driving power supply further comprises an anti-interference and protection module.

[0023] The anti-interference and protection module is used for protecting the whole system.

[0024] The anti-interference and protection module comprises a filter capacitor, and the filter capacitor is arranged at the input end of the first voltage comparator and the input end of the second voltage comparator, respectively.

[0025] The signal path of the detection system of the IGBT driving power supply adopts a shielded cable or a PCB layout, so as to reduce the influence of electromagnetic interference on the detection result.

[0026] The second aspect of the present application provides a detection method of an IGBT driving power supply, based on the detection system of the IGBT driving power supply provided in the first aspect of the present application, comprising the following steps:

[0027] The positive output voltage of the IGBT driving power supply is connected to the non-inverting input end of the first voltage comparator through the first resistance divider network, a set reference voltage is input to the inverting input end of the first voltage comparator, when the positive output voltage is greater than or equal to the set normal positive voltage, the first voltage comparator outputs a high level signal, and when the positive output voltage is less than the set normal positive voltage, the first voltage comparator outputs a low level signal.

[0028] The negative output voltage of the IGBT driving power supply is connected to the non-inverting input end of the second voltage comparator through the second resistance divider network, a set reference voltage is input to the inverting input end of the second voltage comparator, when the negative output voltage is less than or equal to the set normal negative voltage, the second voltage comparator outputs a high level signal, and when the negative output voltage is greater than the set normal negative voltage, the second voltage comparator outputs a low level signal.

[0029] The output signals of the first voltage comparator and the second voltage comparator are input into an AND gate, the AND gate outputs a high level signal when the first and second voltage comparators both output high level signals, the high level signal makes the LED light up, indicating that the positive and negative output voltages are both within the set normal voltage range, otherwise the AND gate outputs a low level signal, and the LED is turned off.

[0030] The third aspect of the present application provides an IGBT driving power supply, comprising a DC-DC converter and an IGBT driving power supply detection system as described in the first aspect of the present application.

[0031] The fourth aspect of the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when loaded into the processor, implements the IGBT driving power supply detection method according to the second aspect.

[0032] The fifth aspect of the present application provides a computer readable storage medium, which stores a computer program, wherein the computer program, when executed by a processor, implements the IGBT driving power supply detection method according to the second aspect.

[0033] Compared with the prior art, the present application detects the positive and negative output voltages of the IGBT driving power supply through the voltage detection module, realizes synchronous detection of the positive and negative voltages, comprehensively judges the state of the driving power supply, and reduces the false alarm rate; the LED state indication module improves the troubleshooting efficiency; the modular design simplifies the circuit and significantly reduces the cost.

[0034] 1. Realize synchronous detection of double voltages and improve detection accuracy: by detecting the positive and negative voltages simultaneously, the false judgment caused by abnormal single-sided voltage is avoided, the stability and safety of system operation are improved, the false alarm rate is reduced from >15% to <0.5%, and the system reliability is significantly improved.

[0035] 2. Quickly locate abnormal power supply and improve troubleshooting efficiency: the detection result is displayed intuitively by the LED, and the feedback is collected by the main control unit, so that the abnormal driving power supply can be quickly identified, and the troubleshooting time is reduced.

[0036] 3. Reduce hardware cost: common discrete components such as comparators, resistors, capacitors, and logic gates are used to build the detection circuit, avoiding the use of expensive special ICs, and significantly reducing the system cost.

[0037] 4. Easy to integrate and maintain: the circuit structure is simple, which is convenient for embedded system integration, reduces the difficulty of later maintenance, and improves the market competitiveness of the product.

[0038] 5. Supports intelligent control: It can work in conjunction with the main control unit to realize functions such as data acquisition, alarm prompts, and remote monitoring, thereby improving the system's intelligence level.

[0039] 6. Strong environmental adaptability: It has anti-interference and protection design and can operate stably in harsh environments such as high temperature, high humidity and strong electromagnetic interference. Attached Figure Description

[0040] Figure 1 This is a basic framework diagram provided according to an embodiment of the present invention;

[0041] Figure 2 This is a hardware schematic diagram provided according to an embodiment of the present invention;

[0042] Figure 3 This is a program control flowchart provided according to an embodiment of the present invention. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. The described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the spirit of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this invention.

[0044] Embodiment 1 of the present invention provides a detection system for an IGBT drive power supply, comprising: a voltage detection module, a logic gate combination module, an LED status indication module, and a main control linkage feedback module. For example... Figure 1 The diagram shows a typical application case of IGBT driver power supply, applied to grid-connected solar photovoltaic systems.

[0045] like Figure 2 As shown, the voltage detection module includes a positive voltage detection unit and a negative voltage detection unit;

[0046] Preferably, but not limitingly, the positive voltage detection unit is used to detect whether the positive output voltage of the IGBT drive power supply is within a set normal voltage range, i.e., whether it is greater than or equal to a set normal positive voltage, such as, but not limited to, whether the positive output voltage is 17V. It includes a first resistor divider network and a first voltage comparator. The first resistor divider network includes a first series resistor R1 and a second series resistor R2, connected between the positive voltage output terminal and ground. Preferably, but not limited to, R1 = 10kΩ and R2 = 3kΩ. The first voltage comparator, for example, but not limited to, an LM393, has its non-inverting input connected to the connection node of resistors R1 and R2 in the first resistor divider network, and its inverting input connected to a first reference voltage source, such as, but not limited to, 4.5V. Specifically, when the positive voltage is greater than or equal to 17V, the voltage after voltage division is approximately 5V, which is greater than 4.5V, and the first voltage comparator outputs a high-level signal.

[0047] The negative voltage detection unit is used to detect whether the negative output voltage of the IGBT drive power supply is within the set normal voltage range, i.e., whether it is less than or equal to the set normal negative voltage, for example, but not limited to, whether the negative output voltage is -7V. It includes a second resistor divider network and a second voltage comparator. The second resistor divider network includes a third series resistor R3 and a fourth series resistor R4, connected between the negative voltage output terminal and ground. Preferably, but not limited to, R3 = 10kΩ and R4 = 3kΩ. The second voltage comparator, for example, but not limited to, an LM 393, has its non-inverting input connected to the connection node of resistors R3 and R4 in the second resistor divider network, and its inverting input connected to a reference voltage source, for example, but not limited to -4.5V. Specifically, when the negative voltage is less than or equal to -7V, the voltage after voltage division is approximately -5V, less than -4.5V, and the second voltage comparator outputs a high-level signal.

[0048] By simultaneously detecting positive and negative voltages through the positive voltage detection unit and the negative voltage detection unit, false alarms caused by unilateral voltage anomalies are avoided, improving the stability and safety of system operation. The false alarm rate is reduced from >15% to <0.5%, significantly improving system reliability.

[0049] The logic gate combination module is connected to the output terminals of the first voltage comparator and the second voltage comparator of the voltage detection module, including AND gates, such as, but not limited to, 74LS08. When both inputs are high level, the output terminal outputs a high level signal.

[0050] The LED status indicator module is connected to the output terminal of the logic gate combination module and includes a current-limiting resistor R5 and an LED.

[0051] Preferably, but not limitingly, the current-limiting resistor R5 is connected in series with the LED, with one end connected to the output of the AND gate. The output signal of the AND gate is connected to the anode of the LED through the current-limiting resistor R5, and the cathode of the LED is grounded. When the AND gate outputs a high level, the LED lights up, indicating that the positive and negative voltages of the IGBT drive power supply are normal; otherwise, the LED is off. For example, but not limited to, the current-limiting resistor R5 = 150Ω. The LED visually displays the detection results, quickly locating abnormal power supplies and improving troubleshooting efficiency.

[0052] The main control linkage feedback module is connected to the output terminal of the logic gate combination module and includes a level conversion circuit and a main control unit. It converts the output signal of the logic gate combination module into a standard level signal and transmits it to the main control unit for data acquisition, fault alarm, or remote monitoring.

[0053] Specifically, the AND gate output signal is converted into a voltage acceptable to the main control unit through the level conversion circuit and connected to the GPIO pin of the main control unit. After reading the signal, the main control unit performs data storage, alarm prompts, or other control operations according to the set logic.

[0054] Preferably, but not limitingly, the level conversion circuit is a 74HC04 inverter or voltage follower, which converts the 5V logic signal into a 3.3V or 5V standard signal and outputs it to the main control unit. When the main control unit receives a high-level signal, it records "Drive power supply normal"; when it receives a low-level signal, it triggers a "Drive power supply abnormal" alarm or executes a self-test process. Further, a filter capacitor is provided at the input terminal of the main control unit, for example, but not limited to, filter capacitor C2 = 100nF.

[0055] The main control linkage feedback module enhances the level of intelligence, supports linkage with the main control unit, and realizes data collection, alarm, and remote monitoring to meet the needs of intelligent operation and maintenance.

[0056] The detection system for an IGBT drive power supply provided in Embodiment 1 of the present invention further includes an anti-interference and protection module, which is used to protect the entire system.

[0057] Preferably, but not limited to, a filter capacitor is added to the input terminal of the voltage comparator, for example, but not limited to, a filter capacitor C1 = 10μF, to suppress high-frequency noise interference and improve detection accuracy.

[0058] To prevent voltage surges from impacting the circuit, a transient voltage suppressor diode (TVS) or a Zener diode is used for overvoltage protection.

[0059] All signal paths utilize shielded cables or optimized PCB layout to reduce the impact of electromagnetic interference (EMI) on the test results. The aforementioned anti-interference and protection module enables the system to operate stably in harsh environments such as high temperature, high humidity, and strong electromagnetic interference.

[0060] This system supports synchronous detection of multiple drive power supplies and features modular expansion capabilities, allowing for the deployment of multiple detection systems. Each channel can be configured with an independent detection system, communicating with the main control unit via bus or serial port to achieve centralized monitoring and fault location of multiple IGBT drive power supplies. The modular design facilitates future expansion and maintenance, making it suitable for multi-channel, high-density industrial control systems. The system is highly adaptable to various environments, possessing anti-interference and protection designs, and can operate stably in harsh environments.

[0061] like Figure 3 As shown, Embodiment 2 of the present invention provides a method for detecting an IGBT drive power supply, based on the IGBT drive power supply detection system described in Embodiment 1 of the present invention, including the following steps:

[0062] Step 1: Connect the output voltage of the IGBT drive power supply to the non-inverting input of the voltage comparator through a resistor divider network. Input the set reference voltage to the inverting input of the comparator. When the voltage is within the set normal range, the comparator outputs a high-level signal. When the voltage is outside the set normal range, the comparator outputs a low-level signal.

[0063] Specifically, a positive voltage is connected to the non-inverting input of a voltage comparator through a resistor divider network. A reference voltage is set at the inverting input of the comparator. When the positive voltage is greater than or equal to the set normal positive voltage, the voltage after voltage division is higher than the reference voltage, and the comparator outputs a high-level signal.

[0064] A negative voltage is connected to the non-inverting input of another voltage comparator via a resistor divider network. A reference voltage is set at the inverting input of the comparator. When the negative voltage is less than or equal to the set normal negative voltage, the voltage after voltage division is lower than the reference voltage, and the comparator outputs a high-level signal. By synchronously detecting positive and negative voltages, the false alarm rate is reduced from >15% to <0.5%, significantly improving system reliability.

[0065] Step 2: Input the output signal of the comparator into an AND gate to obtain the output signal of the AND gate. When both high-level signals are present, the AND gate outputs a high-level signal, which lights up the LED, indicating that both positive and negative voltages are normal; otherwise, the AND gate outputs a low-level signal, and the LED turns off. This LED status indication significantly shortens fault location time and improves troubleshooting efficiency.

[0066] Step 3: The output signal of the AND gate is input to the main control unit. After reading the signal, the main control unit performs data storage, alarm prompts, or other control operations according to the set logic. Specifically, when a high-level signal is output, normal inversion occurs; when a low-level signal is output, startup stops. By connecting the AND gate output signal to the main control unit, functions such as data recording, alarm prompts, and remote monitoring are supported, improving the level of intelligence.

[0067] Through the above steps, the synchronous detection and status display of the positive and negative voltages of the IGBT drive power supply are realized, which effectively solves the problem of false alarms caused by abnormal drive power supply in the laboratory, and provides a rapid positioning and feedback mechanism, which has good practical value and promotion prospects.

[0068] Embodiment 3 of the present invention provides an IGBT driving power supply, such as Figure 2 As shown, it includes a DC-DC converter and a detection system for an IGBT drive power supply as described in Example 1.

[0069] Embodiment 4 of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is loaded onto the processor, it implements a detection method for an IGBT drive power supply as described in Embodiment 2.

[0070] Embodiment 5 of the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements a detection method for an IGBT drive power supply according to Embodiment 2.

[0071] It is worth noting that in the embodiments of the present invention, "steps + numbers" is only a way of expressing a specific implementation of an IGBT driving power supply and its detection system and detection method, and is not an absolute restriction on the order of the steps. Under the guidance of the core concept of the present invention, changing the order of these steps to obtain the same or similar technical effects all fall within the scope of the present invention.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A detection system for an IGBT drive power supply, characterized in that, include: Voltage detection module, logic gate combination module, LED status indicator module; The voltage detection module includes a positive voltage detection unit and a negative voltage detection unit. The positive voltage detection unit is used to detect whether the positive output voltage of the IGBT drive power supply is greater than or equal to a set normal positive voltage based on a first resistor voltage divider network and a first voltage comparator. The negative voltage detection unit is used to detect whether the negative output voltage of the IGBT drive power supply is less than or equal to a set normal negative voltage based on a second resistor voltage divider network and a second voltage comparator. The first resistor voltage divider network includes a first series resistor and a second series resistor. The positive voltage output terminal of the IGBT drive power supply is connected to the second series resistor, connected in series with the first series resistor, and then grounded. The non-inverting input terminal of the first voltage comparator is connected to the connection node of the second series resistor and the first series resistor, and the inverting input terminal is connected to a first reference voltage source that outputs a set first reference voltage. The second resistor voltage divider network includes a third series resistor and a fourth series resistor. The negative voltage output terminal of the IGBT drive power supply is connected to the fourth series resistor, connected in series with the third series resistor, and then grounded. The non-inverting input terminal of the second voltage comparator is connected to the connection node of the fourth series resistor and the third series resistor, and the inverting input terminal is connected to a second reference voltage source that outputs a set second reference voltage. When the positive output voltage is greater than or equal to the set normal positive voltage, the voltage input to the first voltage comparator after being divided by the first resistor voltage divider network is greater than the first reference voltage, and the first voltage comparator outputs a high-level signal. When the negative output voltage is less than or equal to the set normal negative voltage, the voltage input to the second voltage comparator after being divided by the second resistor voltage divider network is less than the second reference voltage, and the second voltage comparator outputs a high-level signal. The logic gate combination module is connected to the output terminals of the positive voltage detection unit and the negative voltage detection unit of the voltage detection module. When the positive output voltage is greater than or equal to the set normal positive voltage and the negative output voltage is less than or equal to the set normal negative voltage, a high-level signal is output. The LED status indicator module is connected to the output terminal of the logic gate combination module. When the logic gate combination module outputs a high-level signal, the LED status indicator module lights up; otherwise, it does not light up.

2. The detection system for an IGBT drive power supply according to claim 1, characterized in that: The logic gate combination module includes AND gates; The AND gate is connected to the output terminals of the first voltage comparator and the second voltage comparator. When both the first voltage comparator and the second voltage comparator output high-level signals, the output terminal of the AND gate outputs a high-level signal.

3. The detection system for an IGBT drive power supply according to claim 2, characterized in that: The LED status indicator module includes a current-limiting resistor R5 and an LED. The current-limiting resistor R5 is connected in series with the LED, and one end of it is connected to the output terminal of the AND gate. The output signal of the AND gate is connected to the anode of the LED through the current-limiting resistor R5. The cathode of the LED is grounded. When the AND gate outputs a high level, the LED lights up; otherwise, the LED is off.

4. The detection system for an IGBT drive power supply according to claim 1, characterized in that: The detection system for the IGBT drive power supply also includes a main control linkage feedback module; The main control linkage feedback module is connected to the output terminal of the logic gate combination module, and converts the output signal of the logic gate combination module into a standard level signal for data acquisition, fault alarm and monitoring. The main control linkage feedback module includes a level conversion circuit and a main control unit; The output signal of the logic gate combination module is converted into a voltage acceptable to the main control unit through the level conversion circuit and connected to the GPIO pin of the main control unit. After reading the output signal of the logic gate combination module through the voltage, the main control unit performs operations according to the set logic.

5. The detection system for an IGBT drive power supply according to claim 1, characterized in that: The detection system for the IGBT drive power supply also includes an anti-interference and protection module; The anti-interference and protection module is used to protect the entire system; The anti-interference and protection module includes a filter capacitor, which is respectively disposed at the input terminal of the first voltage comparator and the input terminal of the second voltage comparator. The signal path of the IGBT drive power supply detection system uses shielded cables or PCB layout to reduce the impact of electromagnetic interference on the detection results.

6. A method for detecting an IGBT drive power supply, based on the IGBT drive power supply detection system as described in claim 3, characterized in that, Includes the following steps: The positive output voltage of the IGBT drive power supply is connected to the non-inverting input of the first voltage comparator through the first resistor voltage divider network. A set reference voltage is input to the inverting input of the first voltage comparator. When the positive output voltage is greater than or equal to the set normal positive voltage, the first voltage comparator outputs a high-level signal. When the positive output voltage is less than the set normal positive voltage, the first voltage comparator outputs a low-level signal. The negative output voltage of the IGBT drive power supply is connected to the non-inverting input of the second voltage comparator through the second resistor voltage divider network. A set reference voltage is input to the inverting input of the second voltage comparator. When the negative output voltage is less than or equal to the set normal negative voltage, the second voltage comparator outputs a high-level signal. When the negative output voltage is greater than the set normal negative voltage, the second voltage comparator outputs a low-level signal. The output signals of the first voltage comparator and the second voltage comparator are input into an AND gate. When both the first voltage comparator and the second voltage comparator output a high-level signal, the AND gate outputs a high-level signal, which lights up the LED, indicating that both the positive and negative output voltages are within the set normal voltage range; otherwise, the AND gate outputs a low-level signal, and the LED turns off.

7. An IGBT drive power supply, characterized in that, It includes a DC-DC converter and a detection system for an IGBT drive power supply as described in any one of claims 1 to 5.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the computer program is loaded into the processor, it implements the IGBT drive power supply detection method according to claim 6.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by the processor, it implements the IGBT drive power supply detection method according to claim 6.

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