CN218771757U - Three-phase full-bridge power module for large-current driving and power supply driving circuit thereof - Google Patents
Three-phase full-bridge power module for large-current driving and power supply driving circuit thereof Download PDFInfo
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- CN218771757U CN218771757U CN202222930501.2U CN202222930501U CN218771757U CN 218771757 U CN218771757 U CN 218771757U CN 202222930501 U CN202222930501 U CN 202222930501U CN 218771757 U CN218771757 U CN 218771757U
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Abstract
The embodiment of the utility model provides a be used for heavy current driven three-phase full-bridge power module and power drive circuit thereof, the circuit includes: the transformer comprises a primary winding and a first secondary winding, wherein the first secondary winding is connected with three first driving branches, each first driving branch comprises a first positive power supply line, two ends of each first positive power supply line are respectively connected with a homonymous end of the first secondary winding and a first positive power supply port of a corresponding IGBT unit in a lower bridge arm, a first negative power supply line, two ends of each first negative power supply line are respectively connected with a synonym end of the first secondary winding and a first negative power supply port of a corresponding IGBT unit in the lower bridge arm, and a first grounding end is respectively connected with the first positive power supply line and the first negative power supply line; a first isolation element is arranged in the first positive power supply line, and a second isolation element is arranged in the first negative power supply line. The embodiment can effectively realize the drive isolation of all IGBT devices of the same secondary winding of the transformer shared by the lower bridge arms.
Description
Technical Field
The embodiment of the utility model provides a relate to power module circuit technical field, especially relate to a three-phase full-bridge power module and power drive circuit for heavy current drive.
Background
In order to drive each IGBT device of the three-phase full-bridge power module to operate continuously and stably, the three-phase full-bridge power module is usually provided with a power driving circuit connected to an external ac power source.
In addition, because lower bridge arms of a three-phase full-bridge power module are connected together, in an application occasion with limited size or cost, all the lower bridge arms commonly share the same secondary winding of the transformer to supply power.
However, in specific implementation, the applicant finds that, in a conventional power driving circuit, driving branches for driving a lower bridge arm are all connected to the same secondary winding of a transformer, and the driving branches cannot be effectively isolated from each other, so that when the power driving circuit is applied to high-current driving, a large parasitic inductance exists in the circuit, and voltage difference generated by the parasitic inductance easily causes misconduction of an IGBT device and damage of the IGBT device.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a technical problem who solves lies in, provides a power drive circuit that is used for heavy current driven three-phase full-bridge power module, can effectively realize the drive of each IGBT device of the same secondary winding of lower bridge arm sharing transformer and keep apart.
The embodiment of the utility model provides a technical problem who further solves provides a three-phase full-bridge power module for heavy current drive, can effectively realize the drive isolation of each IGBT device.
In order to solve the above technical problem, an embodiment of the present invention first provides the following technical solution: a power supply driving circuit of a three-phase full-bridge power module comprises a transformer, wherein the transformer comprises a primary winding and a first secondary winding, the primary winding is connected with an external alternating current power supply, the first secondary winding is connected with three first driving branch circuits, the three first driving branch circuits are identical in structure and are used for driving three IGBT units of a lower bridge arm of the three-phase full-bridge power module in a one-to-one correspondence mode, each first driving branch circuit comprises a first positive power supply circuit, two ends of each first positive power supply circuit are respectively connected with a homonymous end of the first secondary winding and a first positive power supply port of one corresponding IGBT unit in the lower bridge arm, a first negative power supply circuit, two ends of each first negative power supply circuit are respectively connected with a synonym end of the first secondary winding and a first negative power supply port of one corresponding IGBT unit in the lower bridge arm, and a first grounding end is respectively connected with the first positive power supply circuit and the first negative power supply circuit and is used for being connected with a grounding port of the three-phase full-bridge power module;
the first positive power supply line is provided with a first isolation element which is in one-way conduction from the homonymous end of the first secondary winding to a first positive power supply port, and the first negative power supply line is provided with a second isolation element which is in one-way conduction from the first negative power supply port to the heteronymous end of the first secondary winding.
Further, the first isolation element and the second isolation element are respectively a first diode and a second diode, a cathode of the first diode is connected with one end of a first resistor, the other end of the first resistor is used as a first positive power output end connected with the first positive power port of the corresponding IGBT unit in the lower bridge arm, an anode of the second diode is connected with one end of the second resistor, and the other end of the second resistor is used as a first negative power output end connected with the first negative power port of the corresponding IGBT unit in the lower bridge arm.
Further, the first driving branch further includes a third diode, a third resistor, a first capacitor, and a second capacitor, wherein:
the negative electrode of the third diode is connected with the first positive power supply output end, the positive electrode of the third diode is connected with one end of a third resistor, and the other end of the third resistor is connected with the first negative power supply output end;
two ends of a first series body formed by connecting the first capacitor and the second capacitor in series are respectively connected with the first positive power supply output end and the first negative power supply output end;
and a line between the third diode and the third resistor and a line between the first capacitor and the second capacitor are communicated and used as the first grounding end of the first driving branch circuit.
Furthermore, the transformer further comprises three second secondary windings, each second secondary winding is correspondingly connected with one second driving branch, and the three second driving branches have the same circuit structure and are used for being connected with the three IGBT units of the upper bridge arm of the three-phase full-bridge power module in a one-to-one correspondence manner.
Further, each of the second driving branches includes a fourth diode, a fourth resistor, a third capacitor, and a fourth capacitor, where:
the negative electrode of the fourth diode is connected to the dotted terminal of the second secondary winding and serves as a second positive power output end of the second driving branch circuit, the positive electrode of the fourth diode is connected with one end of a fourth resistor, and the other end of the fourth resistor is connected with the dotted terminal of the second secondary winding and serves as a second negative power output end of the second driving branch circuit;
two ends of a second series body formed by connecting the third capacitor and the fourth capacitor in series are respectively connected to the second positive power supply output end and the second negative power supply output end;
a line between the fourth diode and the fourth resistor and a line between the third capacitor and the fourth capacitor are communicated and are used as a second grounding end of the second driving branch circuit;
and a second positive power output end and a second negative power output end of the same second driving branch are respectively and correspondingly connected to a second positive power port and a second negative power port of the same IGBT unit of the upper bridge arm, and a second grounding end of each second driving branch is connected to a grounding port of the three-phase full-bridge power module.
Furthermore, the power driving circuit further comprises filtering modules respectively arranged between the first secondary winding and each of the first driving branches and between each of the second secondary windings and each of the second driving branches, each filtering module comprises a fifth capacitor and a sixth capacitor, and two ends of a parallel body formed by the parallel connection of the fifth capacitor and the sixth capacitor are respectively connected with a homonymous end and a heteronymous end of the corresponding first secondary winding or the corresponding second secondary winding.
Furthermore, the filtering module further comprises an anti-reverse diode connected between the parallel connection body and the corresponding homonymous end of the first secondary winding or the second secondary winding, the positive electrode of the anti-reverse diode is connected with the homonymous end of the corresponding first secondary winding or the second secondary winding, and the negative electrode of the anti-reverse diode is connected with the parallel connection body.
On the other hand, in order to solve the above-mentioned further technical problem, the embodiment of the utility model provides a following technical scheme is provided again: a three-phase full-bridge power module comprises an upper bridge arm with three IGBT units, a lower bridge arm with three IGBT units and power driving circuits correspondingly connected with the IGBT units, wherein the power driving circuits are the power driving circuits.
After the technical scheme is adopted, the embodiment of the utility model provides an at least, following beneficial effect has: the embodiment of the utility model provides a same first secondary winding of transformer is all connected to three first drive branch roads of power drive circuit, through set up first isolation component and second isolation component on the first positive power supply line and the first negative power supply line at every first drive branch road respectively, because first isolation component certainly the homonymy end of first secondary winding is to first positive power port one-way conduction, and the second isolation component certainly first negative power port to the heteronymy end one-way conduction of first secondary winding to make mutual isolation between the first positive power supply line and the first negative power supply line of each first drive branch road, thereby make each first drive branch road also can normally stabilize work under great current situation.
Drawings
Fig. 1 is a circuit diagram of an alternative embodiment of the power driving circuit of the three-phase full-bridge power module of the present invention.
Fig. 2 is a circuit diagram of an upper bridge arm and a lower bridge arm of an optional embodiment of the three-phase full-bridge power module of the present invention.
Fig. 3 is a circuit diagram of a PWM driving circuit according to an optional embodiment of the three-phase full-bridge power module of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and specific examples. It is to be understood that the following illustrative embodiments and description are only intended to illustrate the present invention, and are not intended to limit the present invention, and features in the embodiments and examples may be combined with each other in the present application without conflict.
As shown in fig. 1-3, an alternative embodiment of the present invention provides a power driving circuit 1 for a high-current driven three-phase full-bridge power module, including:
the transformer 10, the transformer 10 includes a primary winding 101 and a first secondary winding 103 connected to an external AC power source AC, the first secondary winding 103 is connected to three first driving branches 12, the three first driving branches 12 have the same circuit structure and are used to drive three IGBT units 4 of a lower arm 3 of the three-phase full-bridge power module in a one-to-one correspondence manner, each first driving branch 12 includes a first positive power line having two ends respectively connected to a dotted end of the first secondary winding 103 and a first positive power port 40 of one corresponding IGBT unit 4 in the lower arm, and a first negative power line having two ends respectively connected to a dotted end of the first secondary winding 103 and a first negative power port 42 of one corresponding IGBT unit 4 in the lower arm 3, and a first ground terminal 121 connected to the first positive power line and the first negative power line respectively and used to be connected to a ground port 5 of the three-phase full-bridge power module;
a first isolation element which is unidirectionally conducted from the homonymous end of the first secondary winding 103 to the first positive power port 40 is arranged in the first positive power line, and a second isolation element which is unidirectionally conducted from the first negative power port 42 to the heteronymous end of the first secondary winding 103 is arranged in the first negative power line.
The embodiment of the utility model provides a same first secondary winding 103 of transformer 10 is all connected to three first drive branch roads 12 of power drive circuit 1, through set up first isolation component and second isolation component on the first positive power supply line and the first negative direction power supply line of every first drive branch road 12 respectively, because first isolation component certainly the dotted terminal of first secondary winding 103 is to first positive power supply port 40 one-way conduction, and the second isolation component certainly first negative direction power supply port 42 to the synonym terminal one-way conduction of first secondary winding 103 to mutual isolation between the first positive power supply line and the first negative direction power supply line of making each first drive branch road 12, thereby make each first drive branch road 12 also can normally stabilize the work under great current situation.
In an optional embodiment of the present invention, as shown in fig. 1, the first isolation element and the second isolation element are a first diode D1 (or D4, D7) and a second diode D2 (or D5, D8), respectively, a negative electrode of the first diode is connected to one end of a first resistor R1 (or R4, R7), another end of the first resistor is used as a first positive power output end 123 connected to the first positive power port 40 of the IGBT unit 4 corresponding to one of the lower bridge arm 3, a positive electrode of the second diode is connected to one end of a second resistor R2 (or R5, R8), and another end of the second resistor is used as a first negative power output end 125 connected to the first negative power port 42 of the IGBT unit 4 corresponding to one of the lower bridge arm 3. In this embodiment, the first isolation element and the second isolation element adopt diodes, and the addition of the first resistor and the second resistor can reduce the current from flowing back to other first driving branches 12, so that each first driving branch 12 can work normally and stably.
In an optional embodiment of the present invention, as shown in fig. 1, the first driving branch 12 further includes a third diode D3 (or D6, D9), a third resistor R3 (or R6, R9), a first capacitor C1 (or C3, C5) and a second capacitor C2 (or C4, C6), wherein:
the cathode of the third diode is connected to the first positive power output terminal 123, the anode of the third diode is connected to one end of the third resistor, and the other end of the third resistor is connected to the first negative power output terminal 125;
the two ends of a first series body formed by the first capacitor and the second capacitor connected in series are respectively connected to the first positive power output end 123 and the first negative power output end 125;
the line between the third diode and the third resistor and the line between the first capacitor and the second capacitor are connected to each other and serve as the first ground terminal 121 of the first driving branch 12.
The embodiment of the present invention simultaneously utilizes the third resistor to increase the impedance between the first ground output ends 125 of each first driving branch 12, which is equivalent to forming a virtual break, so that the first ground output ends 125 of each first driving branch 12 are independent, and do not interfere with each other when driving the three IGBT units 4 of the lower bridge arm 3; in addition, the first resistor and the second resistor can reduce the discharge current of the first capacitor and the second capacitor from flowing back to other first driving branches 12, so that each first driving branch 12 can work normally and stably.
As shown in fig. 2-3, the first/second positive power port 40 of the IGBT unit 4 is VP15V _ UL in fig. 3, the first/second negative power port 42 is VS8L1 in fig. 3, and the ground port 5 of the three-phase full-bridge power module is GND _ UL in fig. 3.
In specific implementation, the first isolation element and the second isolation element may also be implemented by an optical coupler device, a magnetic isolation element, or the like.
In an optional embodiment of the present invention, as shown in fig. 1, the transformer 10 further includes three second secondary windings 105, each of the second secondary windings 105 is correspondingly connected to one second driving branch 14, and three second driving branches 14 have the same circuit structure and are used for one-to-one connection with three IGBT units 4 of the upper bridge arm 6 of the three-phase full-bridge power module. In this embodiment, three second driving branches 14 are further provided to be respectively connected to the second secondary winding 105 of one transformer 10, so as to realize independent power driving of the three IGBT units 4 of the upper arm 6 of the three-phase full-bridge power module, and thus, normal and stable operation of the three-phase full-bridge power module can be ensured.
In an optional embodiment of the present invention, as shown in fig. 1, each of the second driving branches 14 includes a fourth diode D10 (or D11, D12), a fourth resistor R10 (or R11, R12), a third capacitor C7 (or C9, C11), and a fourth capacitor C8 (or C10, C12), wherein:
the cathode of the fourth diode is connected to the dotted terminal of the second secondary winding 105 and serves as the second positive power output terminal 141 of the second driving branch 14, the anode of the fourth diode is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to the dotted terminal of the second secondary winding 105 and serves as the second negative power output terminal 143 of the second driving branch 14;
two ends of a second series body formed by connecting the third capacitor and the fourth capacitor in series are respectively connected to the second positive power output end 141 and the second negative power output end 143;
a line between the fourth diode and the fourth resistor and a line between the third capacitor and the fourth capacitor are communicated and used as a second grounding end 145 of the second driving branch 14;
a second positive power output end 141 and a second negative power output end 143 of the same second driving branch 14 are respectively and correspondingly connected to a second positive power port 44 and a second negative power port 46 of the same IGBT unit 4 of the upper bridge arm 6, and a second ground terminal 145 of each second driving branch 14 is connected to the ground port 5 of the three-phase full-bridge power module.
In this embodiment, each second driving branch 14 is designed by using the circuit elements, so that the circuit structure is simple, and independent driving of each IGBT unit 4 of the upper bridge arm 6 can be effectively realized.
In an optional embodiment of the present invention, as shown in fig. 1, the power driving circuit 1 further includes a filtering module 16 respectively disposed between the first secondary winding 103 and each of the first driving branches 12, each of the second secondary winding 105 and each of the second driving branches 14, the filtering module 16 includes a fifth capacitor C13 (or C15, C17, C19) and a sixth capacitor C14 (or C16, C18, C20), and both ends of a parallel body formed by the parallel connection of the fifth capacitor and the sixth capacitor are connected to the homonymous end and the heteronymous end of the corresponding one of the first secondary winding 103 or the second secondary winding 105. In the embodiment, the fifth capacitor and the sixth capacitor are connected in parallel to form the double-capacitor filter circuit, so that interference signals and clutter in the input current are filtered, and the stability of the circuit is improved.
In an optional embodiment of the present invention, as shown in fig. 1, the filtering module 16 further includes an anti-reverse diode D13 (or D14, D15, D16) connected between the parallel body and the end of the same name of the corresponding first secondary winding 103 or second secondary winding 105, wherein the anode of the anti-reverse diode is connected to the end of the same name of the corresponding first secondary winding 103 or second secondary winding 105, and the cathode of the anti-reverse diode is connected to the parallel body. In the embodiment, the reverse connection prevention diode is further arranged, and when the positive electrode and the negative electrode of the circuit power supply are connected in a wrong mode, the reverse connection prevention diode can be immediately cut off, so that the circuit is disconnected, and the safety of the circuit is guaranteed.
On the other hand, as shown in fig. 1, fig. 2 and fig. 3, the embodiment of the present invention further provides a three-phase full-bridge power module for large current driving, including three IGBT units 4 constituting an upper arm 6, three IGBT units 4 constituting a lower arm 3, and a power driving circuit 1 correspondingly connected to each of the IGBT units 4, where the power driving circuit is the power driving circuit as described in any one of the above. In this embodiment, the three-phase full-bridge power module adopts the power driving circuit, so that the driving isolation of the lower bridge arm 3 can be effectively realized, and the three-phase full-bridge power module can be applied to large-current driving.
As shown in fig. 2, each IGBT unit 4 of the upper arm 6 and the lower arm 3 is the same, and each IGBT unit 4 includes an IGBT (e.g., Q2 to Q7 in fig. 2) and a PWM driving circuit 40 connected to the IGBT; as shown in fig. 3, the first/second positive power supply port (e.g., VP15V _ UL in fig. 3) and the first/second negative power supply port (e.g., VS8L1 in fig. 3) of each IGBT unit 4 are disposed on the PWM driving circuit 40, the driving terminal 401 of each PWM driving circuit 40 is connected to the gate of the IGBT to drive the corresponding IGBT, and the PWM signal source 403 in the PWM driving circuit 40 may be various circuit modules capable of outputting a PWM driving signal.
The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, and these forms are within the scope of the present invention.
Claims (8)
1. A power supply driving circuit for a high-current-driven three-phase full-bridge power module comprises a transformer, wherein the transformer comprises a primary winding and a first secondary winding, the primary winding is connected with three first driving branches, the three first driving branches are identical in circuit structure and are used for driving three IGBT units of a lower bridge arm of the three-phase full-bridge power module in a one-to-one correspondence mode, each first driving branch comprises a first positive power supply line, two ends of the first positive power supply line are respectively connected with a homonymous end of the first secondary winding and a first positive power supply port of one corresponding IGBT unit in the lower bridge arm, two ends of the first negative power supply line are respectively connected with a synonym end of the first secondary winding and a first negative power supply port of one corresponding IGBT unit in the lower bridge arm, and a first grounding end is respectively connected with the first positive power supply line and the first negative power supply line and is used for being connected with a grounding port of the three-phase full-bridge power module;
the first positive power supply line is provided with a first isolation element which is in one-way conduction from the homonymous end of the first secondary winding to a first positive power supply port, and the first negative power supply line is provided with a second isolation element which is in one-way conduction from the first negative power supply port to the heteronymous end of the first secondary winding.
2. The power driving circuit of claim 1, wherein the first isolation element and the second isolation element are a first diode and a second diode, respectively, a cathode of the first diode is connected to one end of a first resistor, the other end of the first resistor is used as a first positive power output end connected to the first positive power port of the corresponding IGBT unit in the lower arm, an anode of the second diode is connected to one end of the second resistor, and the other end of the second resistor is used as a first negative power output end connected to the first negative power port of the corresponding IGBT unit in the lower arm.
3. The power driver circuit of claim 2 for a high current driven three-phase full bridge power module, wherein the first driving branch further comprises a third diode, a third resistor, a first capacitor and a second capacitor, wherein:
the negative electrode of the third diode is connected with the first positive power supply output end, the positive electrode of the third diode is connected with one end of a third resistor, and the other end of the third resistor is connected with the first negative power supply output end;
two ends of a first series body formed by connecting the first capacitor and the second capacitor in series are respectively connected with the first positive power supply output end and the first negative power supply output end;
and a line between the third diode and the third resistor and a line between the first capacitor and the second capacitor are communicated and used as the first grounding end of the first driving branch circuit.
4. The power driving circuit of the three-phase full-bridge power module driven by large current as claimed in any one of claims 1 to 3, wherein the transformer further comprises three second secondary windings, each of the second secondary windings is correspondingly connected with one second driving branch, and the three second driving branches have the same circuit structure and are used for connecting three IGBT units of the upper bridge arm of the three-phase full-bridge power module in a one-to-one correspondence manner.
5. The power driver circuit of claim 4 for a high current driven three-phase full bridge power module, wherein each of said second driving branches comprises a fourth diode, a fourth resistor, a third capacitor and a fourth capacitor, wherein: the negative electrode of the fourth diode is connected to the dotted terminal of the second secondary winding and serves as a second positive power output end of the second driving branch circuit, the positive electrode of the fourth diode is connected with one end of a fourth resistor, and the other end of the fourth resistor is connected with the dotted terminal of the second secondary winding and serves as a second negative power output end of the second driving branch circuit;
two ends of a second series body formed by connecting the third capacitor and the fourth capacitor in series are respectively connected to the second positive power supply output end and the second negative power supply output end;
a line between the fourth diode and the fourth resistor and a line between the third capacitor and the fourth capacitor are communicated and used as a second grounding end of the second driving branch circuit;
and a second positive power output end and a second negative power output end of the same second driving branch are respectively and correspondingly connected to a second positive power port and a second negative power port of the same IGBT unit of the upper bridge arm, and a second grounding end of each second driving branch is connected to a grounding port of the three-phase full-bridge power module.
6. The power driving circuit of claim 5, further comprising a filter module respectively disposed between the first secondary winding and each of the first driving branches and between each of the second secondary windings and each of the second driving branches, wherein the filter module comprises a fifth capacitor and a sixth capacitor, and two ends of a parallel connection body formed by the parallel connection of the fifth capacitor and the sixth capacitor are respectively connected to the homonymous end and the heteronymous end of the corresponding one of the first secondary winding or the second secondary winding.
7. The power driving circuit of claim 6, wherein the filter module further comprises a reverse connection prevention diode connected between the parallel connection body and the corresponding one of the terminals of the first secondary winding or the second secondary winding, the positive electrode of the reverse connection prevention diode is connected to the corresponding one of the terminals of the first secondary winding or the second secondary winding, and the negative electrode of the reverse connection prevention diode is connected to the parallel connection body.
8. A three-phase full-bridge power module for large-current driving, which comprises an upper bridge arm with three IGBT units, a lower bridge arm with three IGBT units and a power supply driving circuit correspondingly connected with each IGBT unit, wherein the power supply driving circuit is the power supply driving circuit as claimed in any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222930501.2U CN218771757U (en) | 2022-11-03 | 2022-11-03 | Three-phase full-bridge power module for large-current driving and power supply driving circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222930501.2U CN218771757U (en) | 2022-11-03 | 2022-11-03 | Three-phase full-bridge power module for large-current driving and power supply driving circuit thereof |
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