A state detection system for an IGBT module

Abstract

The application discloses a kind of state detection systems of IGBT module, the system includes drive power detection module and control center;Wherein, the drive power detection module is connected between drive power module and power isolation module, the power isolation module is connected with IGBT module, the control center is connected with the output of the drive power detection module;The drive power detection module is used to detect the drive power that the drive power module provides to the IGBT module;The control center is used to generate the state detection result of the IGBT module after receiving the drive power.The state detection system of IGBT module provided in the application, by detecting the drive power that drive power module provides to IGBT module, whether IGBT module is in damaged state or injury state can be determined, it is important to guarantee the reliability of system, is suitable for wide range of popularization and application.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power electronics, and particularly relates to a state detection system of an IGBT module. BACKGROUND

[0002] After long-term development, China has become the largest energy producer and energy consumer in the world. At present, the energy sources of China mainly include hydropower, nuclear power, solar energy, wind power, natural gas, coal and the like.

[0003] In the energy storage, inverter and UPS industries, the semiconductor device IGBT module is the core component in the industry products and is also the component most easily damaged or damaged. Once the IGBT module is damaged, the entire system will not work normally, which is fatal to some occasions with high power requirements, and if the damaged IGBT module still works normally, the reliability of the entire system will be greatly reduced, so it is necessary to detect the damage state or damage state of the IGBT module in real time.

[0004] The above information is given as background information only to assist with an understanding of the present disclosure, and does not constitute admission or recognition that any of the above information constitutes prior art with respect to the present disclosure. SUMMARY

[0005] The present application provides a state detection system of an IGBT module to solve the problems of the prior art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A state detection system of an IGBT module, the system comprises a driving power detection module and a control center; wherein,

[0008] The driving power detection module is connected between a driving power supply module and a power isolation module, the power isolation module is connected with the IGBT module, and the control center is connected with the output end of the driving power detection module;

[0009] The driving power detection module is used for detecting the driving power provided by the driving power supply module to the IGBT module;

[0010] The control center is used for generating a state detection result of the IGBT module after receiving the driving power.

[0011] Further, in the state detection system of the IGBT module, the driving power detection module comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5 and an operational amplifier U1;

[0012] The first resistor R1 is connected in series between the driving power supply module and the power supply isolation module.

[0013] One end of the second resistor R2 is connected between the first resistor R1 and the driving power supply module, and the other end of the second resistor R2 is connected to the positive input terminal of the operational amplifier U1.

[0014] One end of the third resistor R3 is connected between the first resistor R1 and the power supply isolation module, and the other end of the second resistor R2 is connected to the negative input terminal of the operational amplifier U1.

[0015] The positive input terminal of the operational amplifier U1 is connected through the fourth resistor R4, the negative input terminal of the operational amplifier U1 is grounded, and the output terminal of the operational amplifier U1 is connected to the control center.

[0016] One end of the fifth resistor R5 is connected between the output terminal of the operational amplifier U1 and the control center, and the other end of the fifth resistor R5 is connected between the negative input terminal of the operational amplifier U1 and the ground.

[0017] Further, in the state detection system of the IGBT module, the output terminal of the operational amplifier U1 is connected to the AD port of the digital signal processor in the control center.

[0018] Further, in the state detection system of the IGBT module, the system further comprises a first N-select-one data selector U2 and a first analog switch SW1.

[0019] The N input ports of the first N-select-one data selector U2 are respectively connected to the output terminals of one of the driving power detection modules.

[0020] The EN port of the first N-select-one data selector U2 is connected to the first I / O port of the digital signal processor in the control center.

[0021] The S0 port, the S1 port and the S2 port of the first N-select-one data selector U2 are respectively connected to the second I / O port, the third I / O port and the fourth I / O port of the digital signal processor in the control center.

[0022] The input terminal of the first analog switch SW1 is connected to the Uout port of the first N-select-one data selector U2, the output terminal of the first analog switch SW1 is connected to the AD port of the digital signal processor in the control center, and the EN port of the first analog switch SW1 is connected to the first I / O port of the digital signal processor in the control center.

[0023] Further, in the state detection system of the IGBT module, the first N-select data selector U2 is an eight-select data selector.

[0024] Further, in the state detection system of the IGBT module, the system further comprises a first N-select data selector U2, a second N-select data selector U3, a first analog switch SW1, a second analog switch SW2, a first NOT gate and a second NOT gate.

[0025] The N input ports of the first N-select data selector U2 are respectively connected with the output ends of the driving power detection modules;

[0026] The N input ports of the second N-select data selector U3 are respectively connected with the output ends of the driving power detection modules;

[0027] The EN port of the first N-select data selector U2 is connected with the first I / O port of the digital signal processor in the control center;

[0028] The EN port of the second N-select data selector U3 is connected with the output end of the first NOT gate, and the input end of the first NOT gate is connected with the first I / O port of the digital signal processor in the control center;

[0029] The S0 port, S1 port and S2 port of the first N-select data selector U2 are respectively connected with the second I / O port, third I / O port and fourth I / O port of the digital signal processor in the control center;

[0030] The S0 port, S1 port and S2 port of the second N-select data selector U3 are respectively connected with the second I / O port, third I / O port and fourth I / O port of the digital signal processor in the control center;

[0031] The input end of the first analog switch SW1 is connected with the Uout port of the first N-select data selector U2, the output end of the first analog switch SW1 is connected with the AD port of the digital signal processor in the control center, and the EN port of the first analog switch SW1 is connected with the first I / O port of the digital signal processor in the control center;

[0032] The input end of the second analog switch SW2 is connected with the Uout port of the second N-select data selector U3, the output end of the second analog switch SW2 is connected with the AD port of the digital signal processor in the control center, the EN port of the second analog switch SW2 is connected with the output end of the second NOT gate, and the input end of the second NOT gate is connected with the first I / O port of the digital signal processor in the control center.

[0033] Further, in the state detection system of the IGBT module, the first N-select data selector U2 and the second N-select data selector U3 are both eight-select data selectors.

[0034] Compared with the prior art, the embodiment of the application has the following beneficial effects:

[0035] The state detection system of the IGBT module provided by the embodiment of the application can determine whether the IGBT module is in a damaged state or a damaged state by detecting the driving power provided by the driving power supply module to the IGBT module, which is of great significance to guarantee the reliability of the system and is suitable for wide range of popularization and application. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0037] Figure 1 is a circuit principle structure schematic diagram of an IGBT module driving circuit in the prior art;

[0038] Figure 2 is a circuit principle structure schematic diagram of a state detection system of an IGBT module provided by the embodiment of the application;

[0039] Figure 3 is a circuit principle structure schematic diagram of a driving power detection module provided by the embodiment of the application;

[0040] Figure 4 is a circuit principle structure schematic diagram of two eight-select data selectors provided by the embodiment of the application.

[0041] Reference signs:

[0042] Driving power detection module 1, control center 2, driving power supply module 3, power isolation module 4, IGBT module 5, PWM driving module 6, optocoupler isolation module 7. DETAILED DESCRIPTION

[0043] In order to make the objects, characteristics and advantages of the present application more apparent and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the embodiments described below are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of the present application.

[0044] In the description of the present application, it should be understood that when one component is considered to be "connected" to another component, it can be directly connected to the other component or can exist simultaneously with a component disposed therebetween. When one component is considered to be "disposed on" another component, it can be directly disposed on the other component or can exist simultaneously with a component disposed therebetween.

[0045] In addition, the terms "long", "short", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application, and do not indicate or imply that the device or element referred to must have this particular orientation, be constructed in a particular orientation, or operate in a particular orientation, and cannot be understood as a limitation of the present application.

[0046] The technical solutions of the present application will be further described below with reference to the accompanying drawings and through specific embodiments.

[0047] Embodiment One

[0048] In view of the defects of the prior art described above, the present applicant, based on many years of rich practical experience and professional knowledge in designing and manufacturing such products, and in cooperation with the application of theory, actively conducts research and innovation in order to create a technology that can solve the defects in the prior art, so that the damage state or damage state of the IGBT module can be detected in time. After continuous research, design, and repeated trial samples and improvement, the present application with practical value is finally created.

[0049] Please refer to Figure 1The existing IGBT module driving circuit includes a driving power supply module 3, a power supply isolation module 4, an IGBT module 5, a PWM driving module 6 and an optical coupling isolation module 7. The driving power supply module 3 provides the driving power required by the IGBT module 5. The power supply isolation module 4 completely electrically isolates the driving power supply module 3 to access the IGBT module 5 side. The PWM driving module 6 provides the modulation wave required by the IGBT module 5 switch. The optical coupling isolation module 7 completely electrically isolates the PWM driving module 6 to access the IGBT module 5 side. Then, the isolated driving power supply module 3 and the isolated PWM driving module 6 are connected to the IGBT module 5 to drive the IGBT module 5 to work. Since the driving power required by the IGBT module 5 to work is completely provided by the driving power supply module 3, the applicant finds that when the IGBT module 5 is damaged, damaged or aged, the driving power required by the IGBT module 5 to work will be abnormal, that is, the driving power deviates from the normal range. Therefore, the applicant proposes an IGBT module state detection system, which detects the driving power required by the IGBT module 5 to work, so that it can be known whether the IGBT module 5 is abnormal, so that the IGBT module 5 that appears abnormal can be processed in time, such as by issuing an alarm to remind the staff to repair or replace.

[0050] Please refer to Figures 2-4 The IGBT module state detection system provided by the embodiment of the application includes a driving power detection module 1 and a control center 2.

[0051] The driving power detection module 1 is connected between the driving power supply module 3 and the power supply isolation module 4. The power supply isolation module 4 is connected with the IGBT module 5. The control center 2 is connected with the output end of the driving power detection module 1.

[0052] The driving power detection module 1 is used to detect the driving power provided by the driving power supply module 3 to the IGBT module 5.

[0053] The control center 2 is used to generate the state detection result of the IGBT module 5 after receiving the driving power.

[0054] It should be noted that, as described above, when the IGBT module 5 is abnormal, such as damaged, injured or aged, the drive power required by the IGBT module 5 will deviate from the normal range, so the drive power detected by the drive power detection module 1 is actually abnormal, at this time, the control center 2 only needs to compare the detected drive power with the preset normal range, and it can be known that the detected drive power does not fall within the preset normal range, so that the detection result that the IGBT module 5 is in a damaged or damaged state can be obtained.

[0055] In the embodiment, the drive power detection module 1 comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5 and an operational amplifier U1; wherein the second resistor R2 and the third resistor R3 have the same resistance value, and the fourth resistor R4 and the fifth resistor R5 have the same resistance value;

[0056] The first resistor R1 is connected in series between the drive power supply module 3 and the power supply isolation module 4.

[0057] One end of the second resistor R2 is connected between the first resistor R1 and the drive power supply module 3, and the other end of the second resistor R2 is connected with the positive input terminal of the operational amplifier U1.

[0058] One end of the third resistor R3 is connected between the first resistor R1 and the power supply isolation module 4, and the other end of the second resistor R2 is connected with the negative input terminal of the operational amplifier U1.

[0059] The positive input terminal of the operational amplifier U1 is connected through the fourth resistor R4, the negative input terminal of the operational amplifier U1 is grounded GND, and the output terminal Uout of the operational amplifier U1 is connected with the control center 2.

[0060] One end of the fifth resistor R5 is connected between the output terminal Uout of the operational amplifier U1 and the control center 2, and the other end of the fifth resistor R5 is connected between the negative input terminal of the operational amplifier U1 and the ground GND.

[0061] It is to be noted that the +VCC outputted by the driving power module 3 becomes +VCC_out after passing through the first resistor R1 and is sent to the input end of the power isolation module 4. The first resistor R1 converts the current signal into a voltage signal and detects the driving power required for the operation of the IGBT module 5. The whole driving power detection module 1 is actually a differential amplifier. The operational amplifier U1 is used to amplify the voltage signal, and R2, R3, R4 and R5 are used to adjust the amplification ratio of the voltage signal. The output end Uout of the operational amplifier U1 outputs the voltage signal to the control center 2. After receiving the detected voltage signal, the control center 2 compares and confirms whether the voltage signal is within the preset reasonable range. If the voltage signal is not within the range, it indicates that the IGBT module 5 may be damaged, injured or seriously aged. The control center 2 timely sends an alarm to the staff to replace the IGBT module 5 in time.

[0062] If the current flowing through the first resistor R1 is I, the relationship expression between Uout and R1 is:

[0063] ;

[0064] Of course, since R2=R3 and R4=R5, the above formula can also be transformed as:

[0065] .

[0066] In the embodiment, the output end Uout of the operational amplifier U1 is connected with the AD (analog-digital conversion) port of the digital signal processor DSP in the control center 2.

[0067] It is to be noted that in actual application, the voltage signal outputted by the output end Uout of the driving power detection module 1 is an analog signal. Since the number of AD ports in the digital signal processor DSP of the control center 2 is limited and the resource is also very tight, it is impossible to sample only one IGBT module 1 by each AD port. In a device system, we often need to use a large number of IGBT modules 1. Therefore, the digital signal processor DSP must sample all the IGBT modules 1 under the limited resource of the AD port. Generally, the AD port of the digital signal processor DSP has fast real-time sampling and slow sampling. The fast real-time sampling requires that the signal sampled in real time uses an AD port alone, while the slow sampling can share an AD port by multiple slow samplings because the speed processing requirement is not high. In this way, the digital signal processor DSP can complete the detection of all the IGBT modules 1 in the whole system under the condition of limited AD port resource.

[0068] Specifically, for the case that multiple slow sampling shares one AD port, the application is realized by adding a data selector. After the multiple slow sampling passes through the data selector, it is sent to one AD sampling port. In this way, one AD port can detect multiple IGBT modules 1, that is, the detection requirement can be met.

[0069] In an embodiment, the added data selector is one, that is, the system further comprises a first N-select-one data selector U2 and a first analog switch SW1.

[0070] The N input ports of the first N-select-one data selector U2 are respectively connected with the output end of one driving power detection module 1.

[0071] The EN port of the first N-select-one data selector U2 is connected with the first I / O port of the digital signal processor DSP in the control center 2.

[0072] The S0 port, S1 port and S2 port of the first N-select-one data selector U2 are respectively connected with the second I / O port, third I / O port and fourth I / O port of the digital signal processor DSP in the control center 2.

[0073] The input end of the first analog switch SW1 is connected with the Uout port of the first N-select-one data selector U2, the output end of the first analog switch SW1 is connected with the AD port of the digital signal processor DSP in the control center 2, and the EN port of the first analog switch SW1 is connected with the first I / O port of the digital signal processor DSP in the control center 2.

[0074] Preferably, the first N-select-one data selector U2 is an eight-select-one data selector.

[0075] It should be noted that if the AD port resource is still insufficient after using an eight-select-one data selector in actual application, two or more eight-select-one data selectors can be used. Taking two eight-select-one data selectors as an example, through simple logic conversion, one AD port can sample sixteen IGBT modules 1, that is:

[0076] In another embodiment, the system further comprises a first N-select-one data selector U2, a second N-select-one data selector U3, a first analog switch SW1, a second analog switch SW2, a first NOT gate and a second NOT gate.

[0077] The N input ports of the first N-select-one data selector U2 are respectively connected with the output end of one driving power detection module 1.

[0078] The N input ports of the second N-select data selector U3 are respectively connected with the output ports of the driving power detection module 1.

[0079] The EN port of the first N-select data selector U2 is connected with the first I / O port of the digital signal processor DSP in the control center 2.

[0080] The EN port of the second N-select data selector U3 is connected with the output port of the first NOT gate, and the input port of the first NOT gate is connected with the first I / O port of the digital signal processor DSP in the control center 2.

[0081] The S0 port, S1 port and S2 port of the first N-select data selector U2 are respectively connected with the second I / O port, third I / O port and fourth I / O port of the digital signal processor DSP in the control center 2.

[0082] The S0 port, S1 port and S2 port of the second N-select data selector U3 are respectively connected with the second I / O port, third I / O port and fourth I / O port of the digital signal processor DSP in the control center 2.

[0083] The input port of the first analog switch SW1 is connected with the Uout port of the first N-select data selector U2, the output port of the first analog switch SW1 is connected with the AD port of the digital signal processor DSP in the control center 2, and the EN port of the first analog switch SW1 is connected with the first I / O port of the digital signal processor DSP in the control center 2.

[0084] The input port of the second analog switch SW2 is connected with the Uout port of the second N-select data selector U3, the output port of the second analog switch SW2 is connected with the AD port of the digital signal processor DSP in the control center 2, the EN port of the second analog switch SW2 is connected with the output port of the second NOT gate, and the input port of the second NOT gate is connected with the first I / O port of the digital signal processor DSP in the control center 2.

[0085] Preferably, the first N-select data selector U2 and the second N-select data selector U3 are both eight-select data selectors.

[0086] It should be noted that the first N-select data selector U2 and the second N-select data selector U3 are two eight-select data selectors, Figure 4In the specific embodiment, Uout1-Uout16 are driving power signals corresponding to the outputs of the sixteen IGBT modules 1, EN is an enable control port of the data selector, Uout is a signal output port of the data selector, VCC and GND are power supply ports of the data selector, S0, S1 and S2 are selection control signal ports of IN0-IN7 channels of the data selector. The first analog switch SW1 and the second analog switch SW2 are each a switching device, and EN is an enable control port of the switching device, and when the enable control port is effective, the left and right ends of the switching device are connected.

[0087] One of the I / Os of the digital signal processor DSP of the control center 2, i.e., a first I / O port, is used to output a chip selection signal CS, the CS signal is connected to the enable port, i.e., the EN port, of the first analog switch SW1 and the first N-select-one data selector U2, and at the same time, the CS is connected to the enable EN port of the first analog switch SW1 through a NOT gate and connected to the enable EN port of the first N-select-one data selector U2 through another NOT gate.

[0088] If the EN ports of the first N-select-one data selector U2 and the first analog switch SW1 are high-level effective, when the CS signal sent by the digital signal processor DSP is high level, the first N-select-one data selector U2 and the first module switch SW1 work, and the second N-select-one data selector U3 and the second module switch SW2 do not work, and at this time, the AD port of the digital signal processor DSP receives the data of Uout1-Uout8; when the CS signal sent by the digital signal processor DSP is low level, the first N-select-one data selector U2 and the first module switch SW1 do not work, and the second N-select-one data selector U3 and the second module switch SW2 start to work, and at this time, the AD port of the digital signal processor DSP receives the data of Uout9-Uout16; thus, the data sampling work of one AD port to the sixteen IGBT modules 1 is completed.

[0089] Although the terms such as driving power detection module, control center, first resistor, second resistor are used more in the text, the possibility of using other terms is not excluded. The use of these terms is only to facilitate the description and explanation of the essence of the application; it is contrary to the spirit of the application to interpret them as any kind of additional limitation.

[0090] The state detection system of the IGBT module provided by the embodiment of the application can determine whether the IGBT module is in a damaged state or a damaged state by detecting the driving power provided by the driving power supply module to the IGBT module, which is of great significance to guarantee the reliability of the system and is suitable for wide range of popularization and application.

[0091] Thus far, the description of the above embodiments has been provided for illustrative and descriptive purposes. This is not intended to be exhaustive or limiting of the present disclosure. Individual elements or features of particular embodiments are generally not limited to those particular embodiments, but may be interchanged and used in selected embodiments where applicable, even if not specifically shown or described. In many respects, the same elements or features may also be varied. Such variations are not considered a departure from this disclosure, and all such modifications are intended to be included within the scope of this disclosure.

[0092] Example embodiments are provided so that this disclosure will become thorough and will fully convey the scope to those skilled in the art. Numerous details, such as examples of specific parts, apparatus, and methods, are set forth to provide a thorough understanding of embodiments of this disclosure. It will be apparent to those skilled in the art that the specific details are not required, and the example embodiments may be implemented in many different forms, neither of which should be construed as limiting the scope of this disclosure. In some example embodiments, well-known processes, well-known apparatus structures, and well-known techniques are not described in detail.

[0093] Technical terms are used herein for the purpose of describing specific exemplary embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a” and “the” as used herein may also refer to the plural forms. The terms “comprising” and “having” are inclusive and therefore specify the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or additional having of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. Unless expressly indicated in order of execution, the method steps, processes, and operations described herein are not to be construed as necessarily requiring performance in the specific order discussed and shown. It should also be understood that additional or optional steps may be employed.

[0094] When an element or layer is referred to as being "on", "engaged to", "connected to" or "coupled to" another element or layer, it can be directly on, engaged, connected or coupled to the other element or layer, or intervening elements or layers can be present. In contrast, when an element or layer is referred to as being "directly on", "directly engaged to", "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., "between" versus "directly between", "adjacent" versus "directly adjacent", etc.). The term "and / or" as used herein refers to and encompasses any and all combinations of one or more of the associated listed items. Although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0095] Spatially relative terms, such as "inner", "outer", "beneath", "below", "lower", "above", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms can be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Claims

1. A state detection system of an IGBT module, characterized by, The system comprises a driving power detection module (1) and a control center (2); wherein, The driving power detection module (1) is connected between a driving power supply module (3) and a power isolation module (4), the power isolation module (4) is connected with an IGBT module (5), and the control center (2) is connected with an output end of the driving power detection module (1); The driving power detection module (1) is used for detecting driving power provided by the driving power supply module (3) to the IGBT module (5); The control center (2) is used for generating a state detection result of the IGBT module (5) after receiving the driving power; The driving power detection module (1) comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5 and an operational amplifier U1; The first resistor R1 is connected in series between the driving power supply module (3) and the power isolation module (4); One end of the second resistor R2 is connected between the first resistor R1 and the driving power supply module (3), and the other end of the second resistor R2 is connected with a positive input end of the operational amplifier U1; One end of the third resistor R3 is connected between the first resistor R1 and the power isolation module (4), and the other end of the second resistor R2 is connected with a negative input end of the operational amplifier U1; The positive input end of the operational amplifier U1 is connected through the fourth resistor R4, the negative input end of the operational amplifier U1 is grounded, and an output end of the operational amplifier U1 is connected with the control center (2); One end of the fifth resistor R5 is connected between the output end of the operational amplifier U1 and the control center (2), and the other end of the fifth resistor R5 is connected between the negative input end of the operational amplifier U1 and the ground.

2. The system for detecting a state of an IGBT module according to claim 1, characterized by, The output end of the operational amplifier U1 is connected with an AD port of a digital signal processor in the control center (2).

3. The system for detecting a state of an IGBT module according to claim 2, characterized by, The system further comprises a first N-select-one data selector U2 and a first analog switch SW1; N input ports of the first N-select-one data selector U2 are respectively connected with output ends of one driving power detection module (1); An EN port of the first N-select-one data selector U2 is connected with a first I / O port of a digital signal processor in the control center (2); S0, S1 and S2 ports of the first N-select-one data selector U2 are respectively connected with a second I / O port, a third I / O port and a fourth I / O port of a digital signal processor in the control center (2); An input end of the first analog switch SW1 is connected with a Uout port of the first N-select-one data selector U2, an output end of the first analog switch SW1 is connected with an AD port of a digital signal processor in the control center (2), and an EN port of the first analog switch SW1 is connected with the first I / O port of the digital signal processor in the control center (2).

4. The system for detecting a state of an IGBT module according to claim 3, characterized by, The first N-select-one data selector U2 is an eight-select-one data selector.

5. The system for detecting a state of an IGBT module according to claim 2, characterized by, The system further comprises a first N-select data selector U2, a second N-select data selector U3, a first analog switch SW1, a second analog switch SW2, a first NOT gate and a second NOT gate; N input ports of the first N-select data selector U2 are connected with outputs of the driving power detection modules (1) respectively; N input ports of the second N-select data selector U3 are connected with outputs of the driving power detection modules (1) respectively; An EN port of the first N-select data selector U2 is connected with a first I / O port of the digital signal processor in the control center (2); An EN port of the second N-select data selector U3 is connected with an output of the first NOT gate, and an input of the first NOT gate is connected with the first I / O port of the digital signal processor in the control center (2); S0, S1 and S2 ports of the first N-select data selector U2 are connected with second, third and fourth I / O ports of the digital signal processor in the control center (2) respectively; S0, S1 and S2 ports of the second N-select data selector U3 are connected with second, third and fourth I / O ports of the digital signal processor in the control center (2) respectively; An input of the first analog switch SW1 is connected with a Uout port of the first N-select data selector U2, an output of the first analog switch SW1 is connected with an AD port of the digital signal processor in the control center (2), and an EN port of the first analog switch SW1 is connected with the first I / O port of the digital signal processor in the control center (2); An input of the second analog switch SW2 is connected with a Uout port of the second N-select data selector U3, an output of the second analog switch SW2 is connected with the AD port of the digital signal processor in the control center (2), and an EN port of the second analog switch SW2 is connected with an output of the second NOT gate, and an input of the second NOT gate is connected with the first I / O port of the digital signal processor in the control center (2).

6. The system for detecting a state of an IGBT module according to claim 5, characterized by, The first N-select data selector U2 and the second N-select data selector U3 are both eight-select data selectors.

Images