Integrated driving board

Abstract

The utility model provides an integrated driving board, comprising a circuit board substrate, the circuit board substrate is provided with an IGBT driving protection circuit, a driving resistor module, a common mode inductor and at least two parallel IGBT modules, the IGBT driving protection circuit comprises at least two output lines, and the driving resistor module is connected with the common mode inductor. And each output line is connected with one IGBT module through one driving resistor module and one common mode inductor in sequence. The beneficial effects of the integrated driving board are that the integrated driving board is provided, through the integrated circuit board, usage of connecting cables can be reduced, space occupation can be effectively reduced, miniaturization can be realized, the circuit board also provides enough impedance for driving loops of parallel IGBTs through introducing common mode inductors into the driving loops, and the reliability of the integrated driving board is improved. Therefore, the problems of driving voltage distortion and oscillation caused by circulating current under a high-power condition can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit structure technical field especially is a kind of integrated drive board. BACKGROUND

[0002] With the development of new energy technology, power electronic converter gradually develops towards high voltage and high power. IGBT is a mainstream fully-controlled semiconductor switching device used in power electronic converter at present, and its current capacity is limited by process level. The IGBT module that existing manufacturers can provide on the market may not meet the current capacity demand of IGBT module. At this time, parallel connection of IGBT modules is used in engineering application.

[0003] To ensure the good working performance of parallel connection of double-tube IGBT, IGBT modules with the same date bar code are generally selected for parallel connection. However, there is still a certain difference between parallel devices. In the dynamic process of turning on and off of parallel IGBT, especially in high-power operation and short-circuit condition, there may be circulating current between drive circuits, which may cause distortion or oscillation of drive voltage. In serious cases, it may cause the system to fail to work normally or short-circuit protection to fail.

[0004] Generally, the drive board used when double-tube IGBT is connected in parallel is divided into two parts according to functional circuits, wherein the resistors and capacitors on the gate electrodes of each IGBT are separately formed into PCB and welded on each double-tube IGBT module. The common drive and protection part of each IGBT connected in parallel is separately formed into a PCB and connected with each PCB directly welded on IGBT through a twisted wire. Based on this scheme, the problem of distortion or oscillation of drive voltage caused by circulating current between parallel drives can be effectively solved. However, a large number of connection cables are required between PCBs, and the overall space utilization is relatively low. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem that a structure is reasonable, and can solve the problem of distortion or oscillation of drive voltage caused by circulating current in drive circuit in parallel connection of IGBT under high-power operation and short-circuit condition.

[0006] To solve the above technical problem, the utility model adopts the technical scheme that an integrated drive board comprises a circuit board substrate, IGBT drive protection circuit, drive resistance module, common mode inductor and at least two parallel IGBT modules are arranged on the circuit board substrate. The IGBT drive protection circuit comprises at least two output lines, each output line is connected with an IGBT module through a drive resistance module and a common mode inductor in sequence.

[0007] Further, a snaking wire set is arranged between the output circuit of the IGBT drive protection circuit and the drive resistance module, and the snaking wire set is used to adjust the path length of the IGBT drive protection circuit to each IGBT module.

[0008] Further, the drive resistance module comprises a first load resistance, a second load resistance and a third load resistance, the common-mode inductor comprises a first input end, a first output end, a second input end and a second output end, and the IGBT module comprises a gate input end and an emitter input end.

[0009] The output end of the first load resistance is connected with the first input end of the common-mode inductor, the first output end of the common-mode inductor is connected with the gate input end of the IGBT module, the output end of the second load resistance is connected with the first input end of the common-mode inductor, the output end of the third load resistance is connected with the second input end of the common-mode inductor, and the second output end of the common-mode inductor is connected with the emitter input end of the IGBT module.

[0010] Further, the output circuit of the IGBT drive protection circuit comprises a first output end of a drive circuit, a second output end of a drive circuit and a third output end of a drive circuit, and the snaking wire set comprises a first snaking wire, a second snaking wire and a third snaking wire.

[0011] The first output end of the drive circuit is connected with the input end of the first load resistance through the first snaking wire, the second output end of the drive circuit is connected with the input end of the second load resistance through the second snaking wire, and the third output end of the drive circuit is connected with the input end of the third load resistance through the third snaking wire.

[0012] Further, the IGBT drive protection circuit comprises an opto-isolated fault feedback module, an opto-isolated drive module and an isolation power supply module, and the primary and secondary power supplies of the isolation power supply module are used to supply power to the primary and secondary power supplies of the opto-isolated fault feedback module and the opto-isolated drive module respectively.

[0013] Further, the opto-isolated drive module is used to receive a drive signal of a controller, and the drive signal is output to the first output end of the drive circuit and the second output end of the drive circuit respectively after being output by an opto-isolation and then by a push-pull circuit.

[0014] Further, the IGBT drive protection circuit comprises a common reference point, and the common reference point is connected with the third output end of the drive circuit.

[0015] Further, the IGBT module is an EconoDUAL double-tube module, the EconoDUAL double-tube module comprises a first IGBT unit and a second IGBT unit, and the emitter of the first IGBT unit is connected with the collector of the second IGBT unit.

[0016] The utility model discloses an integrated drive board, through integrated circuit board, can reduce the use of connecting cable, effectively reduced space occupation, be favorable to the realization of miniaturization, and the circuit board still through the drive loop introduction common mode inductance, provide enough impedance between the drive loop of parallel IGBT, thereby can avoid the problem of drive voltage distortion and oscillation caused by circulating current under the condition of high power. BRIEF DESCRIPTION OF DRAWINGS

[0017] The specific structure of the utility model will be described in detail below in combination with the drawings:

[0018] Figure 1 It is the connection structure schematic diagram of the utility model's integrated drive board;

[0019] Figure 2 It is the circuit structure schematic diagram of one embodiment of the utility model's integrated drive board;

[0020] Figure 3 It is the circuit structure schematic diagram of the embodiment of the utility model's adoption EconoDUAL double pipe module;

[0021] Figure 4 It is the radio frequency oscillation waveform diagram of the utility model's integrated drive board in short circuit test;

[0022] 1-circuit board substrate;

[0023] 11-IGBT drive protection circuit;111-photocoupler isolation fault feedback module;112-photocoupler isolation drive module;113-isolation power module;114-drive resistance module;115-snake line group;

[0024] 12-common mode inductance;

[0025] 2-IGBT module. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the range of protection of the utility model.

[0027] In the description of the utility model, it is understood that the directions or positional relations indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are the directions or positional relations shown based on the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0028] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0029] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be connected, or detachable, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication or interaction between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0030] In the utility model, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and inclined upper of the first feature to the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and inclined lower of the first feature to the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0031] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0032] Embodiment

[0033] Please refer to Figure 1 , Figure 2 and Figure 4 , the embodiment provides an integrated drive board, comprising a circuit board substrate 1, the circuit board substrate 1 is provided with IGBT drive protection circuit 11, drive resistance module 114, common mode inductor 12 and at least two IGBT modules 2, the IGBT drive protection circuit 11 includes at least two output lines, each output line is connected with at least two IGBT modules 2 through a drive resistance module 114 and a common mode inductor 12 in turn.

[0034] In the embodiment, by integrating IGBT drive protection circuit 11, drive resistance module 114, common mode inductor 12 and IGBT module 2 on a circuit board, IGBT drive protection circuit 11, drive resistance module 114, common mode inductor 12 and IGBT module 2 are connected with each other through the microstrip line on the circuit board, which can reduce the use of connecting cable, reduce the occupation of space, make the product more compact, and facilitate the miniaturization of the product.

[0035] In an embodiment, a snakelike line group 115 is arranged between the output line of the IGBT drive protection circuit 11 and the drive resistance module 114, and the snakelike line group 115 is used to adjust the path length from the IGBT drive protection circuit 11 to each IGBT module 2.

[0036] In the present embodiment, by designing the snakelike line group 115, the path length from the IGBT drive protection circuit 11 to each IGBT module 2 can be made the same, and the driving signal generated by the IGBT drive protection circuit 11 can reach the plurality of IGBT modules 2 arranged in parallel at the same time, so that the occurrence of circulating current caused by driving voltage distortion or oscillation can be effectively avoided, and the normal working condition of the product is affected.

[0037] In an embodiment, the drive resistance module 114 comprises a first load resistance, a second load resistance and a third load resistance, the common mode inductor 12 comprises a first input end, a first output end, a second input end and a second output end, and the IGBT module 2 comprises a gate input end and an emitter input end.

[0038] The output end of the first load resistance is connected to the first input end of the common mode inductor 12, and the first output end of the common mode inductor 12 is connected to the gate input end of the IGBT module 2; the output end of the second load resistance is connected to the first input end of the common mode inductor 12; and the output end of the third load resistance is connected to the second input end of the common mode inductor 12, and the second output end of the common mode inductor 12 is connected to the emitter input end of the IGBT module 2.

[0039] In the embodiment, each drive resistance module 114 comprises a first load resistance, a second load resistance and a third load resistance, each common mode inductor 12 comprises a first input end, a first output end, a second input end and a second output end, and each IGBT module 2 comprises a gate input end and an emitter input end.

[0040] For the convenience of description, the connection relationship between the IGBT drive protection circuit 11 and one of the IGBT modules 2 is described below.

[0041] The output end of the first load resistance of the drive resistance module 114 is connected to the first input end of the common mode inductor 12, and the first output end of the common mode inductor 12 is connected to the gate input end of the IGBT module 2.

[0042] The output end of the second load resistance of the drive resistance module 114 is connected to the first input end of the common mode inductor 12.

[0043] The output end of the third load resistance of the drive resistance module 114 is connected to the second input end of the common mode inductor 12, and the second output end of the common mode inductor 12 is connected to the emitter input end of the IGBT module 2.

[0044] By setting the drive resistance module 114, the oscillation of the drive circuit can be effectively reduced, and the misoperation of the IGBT module 2 can be avoided. Meanwhile, the drive power can be shared by the drive resistance module 114, so as to avoid the direct action of the drive voltage on the IGBT module 2, which may cause the IGBT module 2 to be damaged due to excessive power loss.

[0045] By setting the common mode inductor 12 between the drive resistance module 114 and the IGBT module 2, sufficient impedance can be provided between the drive circuits of the parallel IGBT modules 2, and the problems of drive voltage distortion and oscillation caused by circulating current under high-power conditions can be effectively avoided.

[0046] In an embodiment, the output line of the IGBT drive protection circuit comprises a first output end of the drive circuit, a second output end of the drive circuit and a third output end of the drive circuit, and the serpentine line set comprises a first serpentine line, a second serpentine line and a third serpentine line.

[0047] The first output end of the drive circuit is connected to the input end of the first load resistor through the first serpentine line, the second output end of the drive circuit is connected to the input end of the second load resistor through the second serpentine line, and the third output end of the drive circuit is connected to the input end of the third load resistor through the third serpentine line.

[0048] In the embodiment, the adjustment of the path is performed by the serpentine line for each channel of the output line of the IGBT drive protection circuit 11, so as to ensure the consistency of the signal arrival time and further avoid the occurrence of the circulating current caused by the distortion or oscillation of the drive voltage, thereby avoiding the possibility of affecting the normal work of the product.

[0049] In an embodiment, the IGBT drive protection circuit 11 comprises an optocoupler isolation fault feedback module 111, an optocoupler isolation drive module 112 and an isolation power supply module 113, and the primary and secondary power supplies of the isolation power supply module 113 are used to supply power to the primary and secondary power supplies of the optocoupler isolation fault feedback module 111 and the optocoupler isolation drive module 112.

[0050] In the embodiment, the optocoupler isolation fault feedback module 111, the optocoupler isolation drive module 112 and the isolation power supply module 113 are integrated in the IGBT drive protection circuit 11, the primary and secondary power supplies of the isolation power supply module 113 are used to supply power to the primary and secondary power supplies of the optocoupler isolation fault feedback module 111 and the optocoupler isolation drive module 112, and the IGBT drive protection circuit comprises a common reference point, which is connected to the third output end of the drive circuit.

[0051] The optocoupler isolation drive module 112 is used to receive the drive signal of the controller, and the drive signal is output to the first output end of the drive circuit and the second output end of the drive circuit through the optocoupler isolation and the push-pull circuit 110. The first output end of the drive circuit is used to output the on signal; the second output end of the drive circuit is used to output the off signal; and the third output end of the drive circuit is used to transmit the reference signal.

[0052] Through the functional modules in the IGBT drive protection circuit 11, the processing and generation of the IGBT module drive signal can be realized, and the fault detection feedback is provided, so that the system can timely find and locate the fault. It should be noted that the IGBT drive protection circuit 11 comprises but is not limited to the optocoupler isolation fault feedback module 111, the optocoupler isolation drive module 112 and the isolation power supply module 113, and other modules can be added to realize more functions.

[0053] Referring to Figure 3 In an embodiment, the IGBT module 2 is an EconoDUAL double tube module, which includes a first IGBT unit and a second IGBT unit, and the emitter of the first IGBT unit is connected to the collector of the second IGBT unit.

[0054] In this embodiment, three groups of IGBT modules are taken as an example for illustration, and each of the three groups of IGBT modules is an EconoDUAL double tube module. The first group of EconoDUAL double tube modules includes a group of first IGBT units Q11 and a group of second IGBT units Q12, the second group of EconoDUAL double tube modules includes two groups of first IGBT units Q21 and two groups of second IGBT units Q22, and the third group of EconoDUAL double tube modules includes three groups of first IGBT units Q31 and three groups of second IGBT units Q32.

[0055] The emitter of the group of first IGBT units Q11 is connected to the collector of the group of second IGBT units Q12, the emitter of the two groups of first IGBT units Q21 is connected to the collector of the two groups of second IGBT units Q22, and the emitter of the three groups of first IGBT units Q31 is connected to the collector of the three groups of second IGBT units Q32. The emitter of the group of first IGBT units Q11, the emitter of the two groups of first IGBT units Q21, and the emitter of the three groups of first IGBT units Q31 are connected to each other, and the emitter of the group of second IGBT units Q12, the emitter of the two groups of second IGBT units Q22, and the emitter of the three groups of second IGBT units Q32 are connected to each other.

[0056] The first push-pull circuit of the IGBT drive protection circuit is connected to the gate of the group of first IGBT units Q11 through a path of the serpentine line (not shown in the figure), the group of first driving resistors R11, and the group of first common-mode inductors L11 arranged in sequence; is connected to the gate of the two groups of first IGBT units Q21 through a path of the serpentine line (not shown in the figure), the two groups of first driving resistors R21, and the two groups of first common-mode inductors L21 arranged in sequence; and is connected to the gate of the three groups of first IGBT units Q31 through a path of the serpentine line (not shown in the figure), the three groups of first driving resistors R31, and the three groups of first common-mode inductors L31 arranged in sequence.

[0057] The emitter of the first group of IGBT units Q11 is connected to the common reference point of the IGBT drive protection circuit through the other path of the first group of common mode inductors L11, the first group of drive resistors R12 and the serpentine line (not shown in the figure) in sequence; the emitter of the second group of IGBT units Q21 is connected to the common reference point of the IGBT drive protection circuit through the other path of the second group of common mode inductors L21, the second group of drive resistors R22 and the serpentine line (not shown in the figure) in sequence; and the emitter of the third group of IGBT units Q31 is connected to the common reference point of the IGBT drive protection circuit through the other path of the third group of common mode inductors L31, the third group of drive resistors R32 and the serpentine line (not shown in the figure) in sequence.

[0058] The second push-pull circuit of the IGBT drive protection circuit is connected to the gate of the first group of second IGBT units Q12 through the serpentine line (not shown in the figure), the third group of drive resistors R13 and the path of the second group of common mode inductors L12 in sequence; connected to the gate of the second group of second IGBT units Q22 through the serpentine line (not shown in the figure), the third group of drive resistors R23 and the path of the second group of common mode inductors L22 in sequence; and connected to the gate of the third group of second IGBT units Q32 through the serpentine line (not shown in the figure), the third group of drive resistors R33 and the path of the second group of common mode inductors L32 in sequence.

[0059] The emitter of the first group of second IGBT units Q12 is connected to the common reference point of the IGBT drive protection circuit through the other path of the second group of common mode inductors L12, the fourth group of drive resistors R14 and the serpentine line (not shown in the figure) in sequence; the emitter of the second group of second IGBT units Q22 is connected to the common reference point of the IGBT drive protection circuit through the other path of the second group of common mode inductors L22, the fourth group of drive resistors R24 and the serpentine line (not shown in the figure) in sequence; and the emitter of the third group of second IGBT units Q32 is connected to the common reference point of the IGBT drive protection circuit through the other path of the second group of common mode inductors L32, the fourth group of drive resistors R34 and the serpentine line (not shown in the figure) in sequence.

[0060] The drive signal of the first push-pull circuit of the IGBT drive protection circuit is opposite to the drive signal of the first push-pull circuit of the IGBT drive protection circuit.

[0061] Through the parallel connection of multiple groups of EconoDUAL double-tube modules, the system can output larger power. The serpentine line and the common mode inductor are arranged in front of each group of IGBT modules to ensure the consistency of the time of the signals reaching the IGBT modules, effectively avoiding the occurrence of circulating current caused by drive voltage distortion or oscillation in the parallel connection system of multiple groups of IGBT modules, and ensuring the stability and reliability of the system.

[0062] From the above description, the utility model has the advantages that: provide a kind of integrated drive board, by integrated circuit board, can reduce the use of connecting cable, effectively reduce the space occupation, it is favorable to the realization of miniaturization, the circuit board is also introduced common mode inductance in drive loop, enough impedance is provided between the drive loop of parallel IGBT, to avoid the problem of drive voltage distortion and oscillation caused by circulation under high-power condition.

[0063] Those skilled in the art can easily understand that the above-mentioned embodiments can be freely combined and superimposed without conflict.

[0064] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation using the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the utility model.

Claims

1. An integrated driver board, characterized in that: The device includes a circuit board substrate on which an IGBT drive protection circuit, a drive resistor module, a common mode inductor, and at least two parallel IGBT modules are disposed. The IGBT drive protection circuit includes at least two output lines, each of which is connected to an IGBT module in sequence through a drive resistor module and a common mode inductor.

2. The driver board according to claim 1, characterized in that: A serpentine wire group is provided between the output line of the IGBT drive protection circuit and the drive resistor module. The serpentine wire group is used to adjust the path length from the IGBT drive protection circuit to each IGBT module.

3. The driver board according to claim 2, characterized in that: The driving resistor module includes a first load resistor, a second load resistor, and a third load resistor; the common mode inductor includes a first input terminal, a first output terminal, a second input terminal, and a second output terminal; and the IGBT module includes a gate input terminal and an emitter input terminal. The output terminal of the first load resistor is connected to the first input terminal of the common-mode inductor, and the first output terminal of the common-mode inductor is connected to the gate input terminal of the IGBT module; the output terminal of the second load resistor is connected to the first input terminal of the common-mode inductor; the output terminal of the third load resistor is connected to the second input terminal of the common-mode inductor, and the second output terminal of the common-mode inductor is connected to the emitter input terminal of the IGBT module.

4. The driver board according to claim 3, characterized in that: The output lines of the IGBT drive protection circuit include a first output terminal, a second output terminal, and a third output terminal of the drive circuit, and the serpentine wire group includes a first serpentine wire, a second serpentine wire, and a third serpentine wire; The first output terminal of the driving circuit is connected to the input terminal of the first load resistor via a first serpentine line, the second output terminal of the driving circuit is connected to the input terminal of the second load resistor via a second serpentine line, and the third output terminal of the driving circuit is connected to the input terminal of the third load resistor via a third serpentine line.

5. The driver board according to claim 4, characterized in that: The IGBT drive protection circuit includes an optocoupler isolation fault feedback module, an optocoupler isolation drive module, and an isolation power supply module. The primary and secondary power supplies of the isolation power supply module supply power to the primary and secondary sides of the optocoupler isolation fault feedback module and the optocoupler isolation drive module, respectively.

6. The driver board according to claim 5, characterized in that: The optocoupler-isolated driver module is used to receive the drive signal from the controller, and after optocoupler isolation, it is output by push-pull circuit to the first output terminal and the second output terminal of the driver circuit, respectively.

7. The driver board according to claim 6, characterized in that: The IGBT drive protection circuit includes a common reference point, which is connected to the third output terminal of the drive circuit.

8. The driver board according to claim 7, characterized in that: The IGBT module is an EconoDUAL dual-transistor module, which includes a first IGBT unit and a second IGBT unit. The emitter of the first IGBT unit is connected to the collector of the second IGBT unit.

Images