IGBT (Insulated Gate Bipolar Translator) driving circuit applied to energy storage inverter and energy storage inverter

Abstract

The utility model discloses an IGBT drive circuit applied to an energy storage inverter and the energy storage inverter, the IGBT drive circuit comprises a switching power supply drive chip and a plurality of drive units, the switching power supply drive chip comprises a signal output end used for outputting a drive signal; each driving unit comprises a transformer, a push-pull circuit connected to a primary winding of the transformer, and a rectifying and filtering output circuit connected to a secondary winding of the transformer; the signal output end is connected to the plurality of push-pull circuits at the same time, so that a single switching power supply driving chip provides a plurality of IGBT driving power supplies, the number of the switching power supply driving chips in the driving circuit of the IGBT module is greatly reduced, the number of other components is reduced, the size of the IGBT driving circuit is reduced, the cost of the IGBT driving circuit is reduced, and the reliability of the IGBT driving circuit is improved. And the probability that the driving signal is interfered is reduced, and the quality of the driving power supply of the IGBT driving circuit is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit technical field especially, it relates to a kind of IGBT drive circuit and energy storage inverter applied to energy storage inverter. BACKGROUND

[0002] In IGBT application system, IGBT driving device has important influence to the volume, cost etc. of entire system. At present, in the IGBT drive circuit applied to energy storage inverter, since the power of energy storage inverter is larger, therefore, IGBT module with higher device integration and multiple IGBT single tubes is generally used, therefore, multiple driving power supplies are needed to be configured to drive multiple IGBT single tubes for each IGBT module, and one driving chip is configured in each driving power supply to drive one transformer, leading to that multiple driving chips and more other elements need to be configured for IGBT drive circuit, and problems such as large size, high cost, driving signal is easily disturbed to cause driving power supply unstable are faced. SUMMARY

[0003] The utility model aims at at least solving one of the technical problems existing in prior art, provide a kind of IGBT drive circuit and energy storage inverter applied to energy storage inverter, can reduce the size of IGBT drive circuit, reduce the cost of IGBT drive circuit, and reduce the probability that driving signal is disturbed, improve the quality of driving power supply of IGBT drive circuit.

[0004] Firstly, the utility model embodiment provides a kind of IGBT drive circuit applied to energy storage inverter, including switching power supply driving chip and multiple drive units, wherein:

[0005] Switching power supply driving chip includes signal output end for output driving signal;

[0006] Each drive unit includes transformer, push-pull circuit connected to the primary winding of the transformer and rectification filter output circuit connected to the secondary winding of the transformer;The signal output end is simultaneously connected to multiple push-pull circuits.

[0007] The utility model discloses an IGBT drive circuit applied to energy storage inverter, at least has following beneficial effect: in each drive unit, the drive signal of switching power supply drive chip is transferred to the primary winding of transformer after the conversion of push -pull circuit, and is transferred to rectification filter output circuit after the conversion of transformer, and finally the drive power supply of IGBT single tube is provided by rectification filter output circuit, and the signal output end of switching power supply drive chip is connected to the push -pull circuit of multiple drive units simultaneously, realizes that single switching power supply drive chip provides multiple IGBT drive power supply, and the number of switching power supply drive chip in the drive circuit of IGBT module integrated with multiple IGBT single tubes is greatly reduced and the number of other components is reduced, is favorable to reduce the size of IGBT drive circuit, reduces the cost of IGBT drive circuit, and reduces the probability of interference of drive signal, improves the drive power supply quality of IGBT drive circuit.

[0008] According to some embodiments of the utility model provide IGBT drive circuit, the push -pull circuit includes first resistance, first triode, second triode and first electric capacity, the signal output end is connected to one end of first resistance, the other end of first resistance is connected to the base of first triode and second triode simultaneously, the collector of first triode is connected direct current power end, the emitter of first triode and second triode are connected and are connected to one end of the primary winding, the other end of the primary winding is connected to one end of the first electric capacity, the other end of the first electric capacity is connected with the collector of second triode and is grounded.

[0009] According to some embodiments of the utility model provide IGBT drive circuit, the rectification filter output circuit includes second electric capacity, first diode and second diode, one end of the secondary winding is connected to one end of the second electric capacity, the other end of the second electric capacity is connected to the cathode of first diode and the anode of second diode, the cathode of second diode is led as positive power output end, the other end of the secondary winding is connected with the anode of first diode and is led as negative power output end.

[0010] According to some embodiments of the utility model provide IGBT drive circuit, the rectification filter output circuit still includes third electric capacity, and the both ends of third electric capacity are connected to the anode of first diode and the cathode of second diode respectively.

[0011] According to some embodiments of the utility model provide IGBT drive circuit, the rectification filter output circuit still includes stabilivolt and second resistance, the cathode of stabilivolt is connected to the cathode of second diode, and the anode of stabilivolt is connected with one end of second resistance and is led as common terminal, and the other end of second resistance is connected to the anode of first diode.

[0012] According to the IGBT driving circuit provided by some embodiments of the present application, the direct current voltage provided by the direct current power supply end connected with the plurality of driving units is the same or different.

[0013] According to the IGBT driving circuit provided by some embodiments of the present application, the transformer is provided with two secondary winding, and the driving unit comprises two rectification and filtering output circuits.

[0014] According to the IGBT driving circuit provided by some embodiments of the present application, the number of the driving units is 2 to 6.

[0015] According to the IGBT driving circuit provided by some embodiments of the present application, the first triode is an NPN triode, and the second triode is a PNP triode.

[0016] In the second aspect, the present application provides an energy storage inverter, which comprises an IGBT module integrated with a plurality of IGBT single tubes and the IGBT driving circuit as described in the first aspect above, and the output ends of the plurality of rectification and filtering output circuits are respectively connected to the plurality of IGBT single tubes.

[0017] According to the energy storage inverter provided by the embodiments of the present application, at least the following beneficial effects are achieved: in each driving unit of the IGBT driving circuit, the driving signal output by the switching power supply driving chip is transmitted to the primary winding of the transformer after conversion by the push-pull circuit, and then transmitted to the rectification and filtering output circuit after conversion by the transformer, and finally the driving power supply of the IGBT single tube is provided by the rectification and filtering output circuit. By connecting the signal output end of the switching power supply driving chip to the push-pull circuit of the plurality of driving units at the same time, a single switching power supply driving chip provides multiple IGBT driving power supplies, which greatly reduces the number of switching power supply driving chips in the driving circuit of the IGBT module integrated with a plurality of IGBT single tubes and reduces the number of other components, which is conducive to reducing the size of the IGBT driving circuit, reducing the cost of the IGBT driving circuit, reducing the probability of interference of the driving signal, and improving the quality of the driving power supply of the IGBT driving circuit.

[0018] Other features and advantages of the present application will be set forth in the following description of the application, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the technical scheme of the present application, and form a part of the specification, and are used to explain the technical scheme of the present application together with the embodiments of the present application, and do not constitute a limitation on the technical scheme of the present application.

[0020] The present application is further described below in conjunction with the drawings and embodiments.

[0021] Figure 1 is a principle block diagram of an IGBT driving circuit applied to an energy storage inverter provided by the embodiments of the present application;

[0022] Figure 2 is a circuit principle diagram of an IGBT driving circuit applied to an energy storage inverter provided by the embodiments of the present application. DETAILED DESCRIPTION

[0023] This part will describe the specific embodiments of the present application in detail, and the preferred embodiments of the present application are shown in the drawings, and the drawings are used to supplement the description of the text part of the specification, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0024] In the description of the embodiments of the present application, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number, "at least one" means one or more, "at least one of the following" and similar expressions mean any combination of these items, including single or multiple items. If there is a description of "first", "second", etc., it is only used to distinguish technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0025] It should be noted that the words such as setting, installing and connecting in the embodiments of the present application should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the embodiments of the present application in combination with the specific content of the technical scheme. For example, the term "connection" can be mechanical connection, electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium.

[0026] It should be noted that the technical features involved in each embodiment of the present application described below can be combined with each other as long as there is no conflict between them.

[0027] In an IGBT application system, the IGBT driving device has important influence on the volume and cost of the whole system. At present, in the IGBT driving circuit applied to the energy storage inverter, since the power of the energy storage inverter is large, the IGBT module with high device integration and multiple IGBT single tubes is generally used. Moreover, the driving of each IGBT single tube needs a special driving power supply, so each IGBT module needs to be configured with multiple driving power supplies to drive multiple IGBT single tubes, and each driving power supply is configured with a driving chip to drive a transformer, so that the IGBT driving circuit needs to be configured with multiple driving chips and more other elements, and faces problems of large size, high cost, and unstable driving power supply caused by easily disturbed driving signal.

[0028] Based on this, the utility model embodiment provides a kind of IGBT driving circuit and energy storage inverter applied to energy storage inverter, can reduce the size of IGBT driving circuit, reduce the cost of IGBT driving circuit, and reduce the probability that driving signal is disturbed, improve the quality of driving power supply of IGBT driving circuit.

[0029] The utility model embodiment is further described below with reference to the drawings.

[0030] Figure 1 It is the principle block diagram of the IGBT driving circuit applied to energy storage inverter provided by the utility model embodiment. Refer to Figure 1 The first aspect embodiment of the utility model provides a kind of IGBT driving circuit applied to energy storage inverter, including switching power supply driving chip 100 and multiple driving units 200, wherein:

[0031] Switching power supply driving chip 100 includes signal output end a, and signal output end a is used to output driving signal to each driving unit 200;

[0032] Each driving unit 200 includes transformer T1, push-pull circuit 210 connected to the primary winding of transformer T1 and rectification filter output circuit 220 connected to the secondary winding of transformer T1;Signal output end a is simultaneously connected to multiple push-pull circuits 210. Figure 1 In the embodiment shown, the number of driving units 200 is 3.

[0033] The IGBT driving circuit applied to the energy storage inverter provided in the embodiment of the utility model, in each driving unit 200, the driving signal output by the switching power supply driving chip 100 is transmitted to the primary winding of the transformer T1 after conversion by the push-pull circuit 210, and then is transmitted to the rectification filtering output circuit 220 after conversion by the transformer T1, finally the driving power supply of the IGBT single tube is provided by the rectification filtering output circuit 220, by simultaneously connecting the signal output end a of the switching power supply driving chip 100 to the push-pull circuit 210 of the plurality of driving units 200, the single switching power supply driving chip 100 provides the multi-way IGBT driving power supply, the number of switching power supply driving chips 100 in the driving circuit of the IGBT module integrated with the plurality of IGBT single tubes and the number of other components are greatly reduced, which is conducive to reducing the size of the IGBT driving circuit, reducing the cost of the IGBT driving circuit, reducing the probability of interference of the driving signal, and improving the driving power supply quality of the IGBT driving circuit.

[0034] It should be noted that the driving signal output by the switching power supply driving chip 100 generally adopts a pulse driving signal, which can make the driving power supply output by the IGBT driving circuit to the plurality of IGBT single tubes more stable, the pulse driving signal output by the switching power supply driving chip 100 is first subjected to voltage reduction and current stabilization by the push-pull circuit 210, and then is transmitted to the primary winding of the transformer T1, so that the influence of the transformer T1 on the switching power supply driving chip 100 is isolated, that is, the influence of the transformer T1 on the pulse driving signal is avoided, the reliability of the IGBT driving circuit is improved, and finally the secondary winding of the transformer T1 rectifies and distinguishes the pulse driving signal into positive bias voltage, original voltage and negative bias voltage through the rectification filtering output circuit 220, thereby generating a stable and reliable, high-quality driving power supply for driving the IGBT single tube.

[0035] Figure 2 The circuit principle diagram of the IGBT driving circuit applied to the energy storage inverter provided in the embodiment of the utility model. Figure 2 In the IGBT driving circuit provided in some embodiments of the utility model, the push-pull circuit 210 includes a first resistor R1, a first transistor Q1, a second transistor Q2 and a first capacitor C1, the signal output end a is connected to one end of the first resistor R1, the other end of the first resistor R1 is simultaneously connected to the base of the first transistor Q1 and the base of the second transistor Q2, the collector of the first transistor Q1 is connected to the DC power supply end, the emitter of the first transistor Q1 and the emitter of the second transistor Q2 are connected and connected to one end of the primary winding, the other end of the primary winding is connected to one end of the first capacitor C1, the other end of the first capacitor C1 is connected to the collector of the second transistor Q2 and grounded.

[0036] In the embodiment, the first resistor R1 serves as the input resistor of the first transistor Q1 and the second transistor Q2, and transmits the pulse driving signal from the signal output end a to the base of the first transistor Q1 and the base of the second transistor Q2, so that the first transistor Q1 and the second transistor Q2 are alternately turned on according to the pulse driving signal, thereby realizing the conversion of the direct current power provided by the direct current power end connected to the collector of the first transistor Q1 and transmitting the direct current power to the primary winding of the transformer T1. When the pulse driving signal is at a high level, the first transistor Q1 is turned on, the direct current power provided by the direct current power end charges the first capacitor C1 through the primary winding of the transformer T1, and the current flowing through the primary winding of the transformer T1 flows from top to bottom. When the pulse driving signal is at a low level, the first transistor Q1 is turned off, and the second transistor Q2 is turned on. The first capacitor C1 is discharged through the primary winding of the transformer T1, and the current flowing through the primary winding of the transformer T1 flows from bottom to top. Thus, an alternating current is generated on the transformer T1, so that energy can be transmitted to the secondary winding.

[0037] Referring to Figure 2 In the IGBT driving circuit provided in some embodiments of the utility model, the rectification and filtering output circuit 220 comprises a second capacitor C2, a first diode D1 and a second diode D2. One end of the secondary winding is connected to one end of the second capacitor C2. The other end of the second capacitor C2 is connected to the cathode of the first diode D1 and the anode of the second diode D2. The cathode of the second diode D2 is led out as a positive power output end VCC. The other end of the secondary winding is connected to the anode of the first diode D1 and led out as a negative power output end VEE.

[0038] In the embodiment, the energy transmitted to the secondary winding of the transformer T1 is rectified by the second capacitor C2, the first diode D1 and the second diode D2, so as to obtain a positive driving power output from the positive power output end VCC and a negative driving power output from the negative power output end VEE, which are used for driving the subsequently connected IGBT single tube.

[0039] Referring to Figure 2 In the IGBT driving circuit provided in some embodiments of the utility model, the rectification and filtering output circuit 220 further comprises a third capacitor C3. The two ends of the third capacitor C3 are respectively connected to the anode of the first diode D1 and the cathode of the second diode D2.

[0040] In the embodiment, the third capacitor C3 is used to filter the power between the positive power output end VCC and the negative power output end VEE, so as to filter out the influence of interference signals, which is conducive to improving the stability of the driving power output by the IGBT driving circuit.

[0041] Referring to Figure 2In the IGBT driving circuit provided by some embodiments of the utility model, the rectification filter output circuit 220 further comprises a stabilizing tube DZ1 and a second resistor R2, the cathode of the stabilizing tube DZ1 is connected with the cathode of the second diode D2, the anode of the stabilizing tube DZ1 is connected with one end of the second resistor R2 and is led out as a common end CNG, and the other end of the second resistor R2 is connected with the anode of the first diode D1.

[0042] In the embodiment, the stabilizing tube DZ1 and the second resistor R2 are connected in series between the positive power output end VCC and the negative power output end VEE, and the common end CNG is led out from the connection point of the stabilizing tube DZ1 and the second resistor R2, so that the voltage between the positive power output end VCC and the common end CNG can be adjusted by adjusting the stabilizing value of the stabilizing tube DZ1, that is, the size of the positive driving power provided by the positive power output end VCC to the subsequent connected IGBT single tube can be adjusted.

[0043] With reference to Figure 2 In the IGBT driving circuit provided by some embodiments of the utility model, the direct current voltages provided by the direct current power ends connected with the plurality of driving units 200 are the same or different.

[0044] It can be understood that, generally, the plurality of IGBT single tubes integrated in the IGBT module are devices of the same type and model, and thus the required driving power is generally the same.

[0045] With reference to Figure 2 In the IGBT driving circuit provided by some embodiments of the utility model, the transformer T1 is provided with two secondary winding groups, and the driving unit 200 comprises two rectification filter output circuits 220.

[0046] In the embodiment, the transformer T1 is configured with two secondary winding groups, and each secondary winding group is connected with one rectification filter output circuit 220, that is, the driving of two IGBT single tubes can be realized by driving one transformer T1, and the number, size and cost of devices of the IGBT driving circuit can be reduced.

[0047] In the IGBT driving circuit provided by some embodiments of the utility model, the number of the driving units 200 is 2 to 6.

[0048] In Figure 1 and Figure 2In the shown embodiment, each driving unit 200 includes two rectification and filtering output circuits 220, the number of driving units 200 in the IGBT driving circuit is 3, that is, one switching power supply driving chip 100 drives three driving units 200, corresponding to six rectification and filtering output circuits 220, which can realize the driving of six IGBT single tubes, and can meet the demand of the driving power supply of the IGBT module commonly integrated with six IGBT single tubes. In some other embodiments, the number of driving units 200 in the IGBT driving circuit can also be adjusted according to the demand of the IGBT module, for example, 2, 4, 5 or 6.

[0049] Referring to Figure 2 In the IGBT driving circuit provided in some embodiments of the utility model, the first triode Q1 is an NPN type triode, and the second triode Q2 is a PNP type triode.

[0050] The IGBT driving circuit provided in each of the above embodiments of the utility model can drive multiple transformers through a single switching power supply driving chip 100, so that one switching power supply driving chip 100 can meet the demand of the driving power supply of multiple IGBT single tubes, and the driving power supply can be arranged near the IGBT module to improve the quality of the driving power supply. The reduction of the number of components in the IGBT driving circuit can significantly reduce the cost of the driving power supply and reduce the equipment failure rate to a certain extent.

[0051] In addition, the second aspect embodiment of the utility model provides an energy storage inverter, which comprises an IGBT module integrated with multiple IGBT single tubes and an IGBT driving circuit as in the above first aspect embodiment, and the output ends of the multiple rectification and filtering output circuits 220 are respectively connected to the multiple IGBT single tubes.

[0052] According to the energy storage inverter provided in the embodiment of the utility model, in each driving unit 200 of the IGBT driving circuit, the driving signal output by the switching power supply driving chip 100 is transmitted to the primary winding of the transformer T1 after conversion by the push-pull circuit 210, and then transmitted to the rectification and filtering output circuit 220 after conversion by the transformer T1, and finally the driving power supply of the IGBT single tube is provided by the rectification and filtering output circuit 220. By simultaneously connecting the signal output end a of the switching power supply driving chip 100 to the push-pull circuits 210 of multiple driving units 200, a single switching power supply driving chip 100 can provide multiple IGBT driving power supplies, which greatly reduces the number of switching power supply driving chips 100 in the driving circuit of the IGBT module integrated with multiple IGBT single tubes and reduces the number of other components, which is conducive to reducing the size of the IGBT driving circuit, reducing the cost of the IGBT driving circuit, reducing the probability of interference of the driving signal, and improving the quality of the driving power supply of the IGBT driving circuit.

[0053] The utility model embodiment has been explained in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiment, still can make various changes in the knowledge range of ordinary skill in the art who has possessed under the premise of not departing from the utility model tenet.

Claims

1. An IGBT drive circuit applied to an energy storage inverter, characterized by, The application relates to a switching power supply driving chip. The switching power supply driving chip comprises a signal output end for outputting a driving signal. Each of the driving units comprises a transformer, a push-pull circuit connected to a primary winding of the transformer, and a rectification and filtering output circuit connected to a secondary winding of the transformer. The signal output end is simultaneously connected to the push-pull circuits.

2. The IGBT drive circuit according to claim 1, characterized by, The push-pull circuit comprises a first resistor, a first transistor, a second transistor and a first capacitor.

3. The IGBT driving circuit according to claim 1, characterized by, The signal output end is connected to one end of the first resistor.

4. The IGBT drive circuit according to claim 3, characterized by The other end of the first resistor is simultaneously connected to the base of the first transistor and the base of the second transistor.

5. The IGBT drive circuit according to claim 3, characterized by The collector of the first transistor is connected to a DC power supply end.

6. The IGBT drive circuit according to claim 2, characterized by, The emitter of the first transistor and the emitter of the second transistor are connected to one end of the primary winding.

7. The IGBT drive circuit according to claim 1, characterized by, The other end of the primary winding is connected to one end of the first capacitor.

8. The IGBT drive circuit of claim 1, wherein, The other end of the first capacitor is connected to the collector of the second transistor and grounded.

9. The IGBT drive circuit according to claim 2, characterized by, The rectification and filtering output circuit comprises a second capacitor, a first diode and a second diode.

10. An energy storage inverter, characterized by, One end of the secondary winding is connected to one end of the second capacitor. The other end of the second capacitor is connected to the cathode of the first diode and the anode of the second diode. The cathode of the second diode is led out as a positive power supply output end. The other end of the secondary winding is connected to the anode of the first diode and led out as a negative power supply output end. The rectification and filtering output circuit further comprises a third capacitor. The third capacitor is connected to the anode of the first diode and the cathode of the second diode. The rectification and filtering output circuit further comprises a voltage stabilizing tube and a second resistor. The cathode of the voltage stabilizing tube is connected to the cathode of the second diode. The anode of the voltage stabilizing tube is connected to one end of the second resistor and led out as a common end. The other end of the second resistor is connected to the anode of the first diode. The DC voltages provided by the DC power supply ends of the driving units are the same or different. The transformer is provided with two secondary windings. The driving unit comprises two rectification and filtering output circuits. The number of the driving units is 2-6. The first transistor is an NPN transistor and the second transistor is a PNP transistor. The application further relates to an IGBT module integrated with a plurality of IGBT single tubes and the IGBT driving circuit. The output ends of the rectification and filtering output circuits are respectively connected to the IGBT single tubes.

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