CN113314345A - Novel electrode capacitance and power module - Google Patents
Novel electrode capacitance and power module Download PDFInfo
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- CN113314345A CN113314345A CN202110379763.1A CN202110379763A CN113314345A CN 113314345 A CN113314345 A CN 113314345A CN 202110379763 A CN202110379763 A CN 202110379763A CN 113314345 A CN113314345 A CN 113314345A
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- 239000003990 capacitor Substances 0.000 claims abstract description 215
- 238000000605 extraction Methods 0.000 claims abstract description 10
- 238000005452 bending Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 2
- 230000003071 parasitic effect Effects 0.000 abstract description 6
- 230000005669 field effect Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 9
- 238000011084 recovery Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/38—Multiple capacitors, i.e. structural combinations of fixed capacitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/228—Terminals
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Inverter Devices (AREA)
Abstract
A novel electrode capacitor comprising: the capacitor comprises a first capacitor bus, a second capacitor bus, a capacitor group, a first capacitor leading-out electrode main body, a first capacitor leading-out electrode connecting part, a second capacitor leading-out electrode main body and a second capacitor leading-out electrode connecting part; the capacitor group is arranged between the first capacitor bus bar and the second capacitor bus bar, and the first capacitor leading-out electrode main body is led out from the first capacitor bus bar and extends towards the direction of the second capacitor bus bar; the second capacitor leading-out electrode main body is led out of the second capacitor bus bar and extends towards the first capacitor bus bar; the first capacitor extraction electrode main body and the second capacitor extraction electrode main body are arranged in a laminated manner; the first capacitor leading-out electrode connecting part is led out from the first capacitor leading-out electrode main body and extends towards the direction far away from the capacitor group; the second capacitor lead-out electrode connecting portion is led out from the second capacitor lead-out electrode main body and extends in a direction away from the capacitor bank. The structure of the capacitor module can be simplified, the volume is reduced, and the parasitic inductance of the whole power module is reduced.
Description
Technical Field
The invention relates to the field of power electronics, in particular to a novel electrode capacitor and a power module.
Background
The power module is a power switch module formed by combining and packaging power electronic power devices such as metal oxide semiconductors (power MOS transistors), insulated gate field effect transistors (IGBT) and Fast Recovery Diodes (FRD) according to certain functions, and is mainly used for power conversion of electric vehicles, wind power generation, industrial frequency conversion and other occasions.
A motor driving circuit of an electric vehicle generally includes three groups of power modules having upper and lower arms, respectively, fig. 1 is a circuit diagram of a conventional power module, which shows a circuit diagram of a group of power modules having upper and lower arms, and includes: an insulated gate field effect transistor Z1 as an upper arm, a fast recovery diode D1 connected in reverse parallel with the insulated gate field effect transistor Z1, an insulated gate field effect transistor Z2 as a lower arm and a fast recovery diode D2 connected in reverse parallel with the fast recovery diode D2, wherein a collector of the insulated gate field effect transistor Z1 is connected with a positive electrode p + of the power module, an emitter of the insulated gate field effect transistor Z2 is connected with a collector of the edge gate field effect transistor Z2, an emitter of the edge gate field effect transistor Z2 is connected with a negative electrode p-of the power module, and the emitter of the insulated gate field effect transistor Z1 and the collector of the insulated gate field effect transistor Z2 are commonly connected with an output terminal of the power module. In practical applications, three sets of the power modules are generally used to provide three-phase alternating current for the motor; the operation principle of the power module is illustrated by the circuit schematic diagram of only one group of power modules: when the insulated gate field effect transistor Z1 is switched on, current is sequentially OUTPUT to the motor through the positive electrode p + of the power module, the collector electrode and the emitter electrode of the insulated gate field effect transistor Z1 and the power module OUTPUT terminal OUTPUT; when the insulated gate field effect transistor Z1 is turned off, since the motor is an inductive load, to ensure that the current flow direction is unchanged, the follow current needs to be OUTPUT to the motor through the other groups of power modules via the negative p-of the power module, the diode D2, and the power module OUTPUT terminal OUTPUT.
In some practical applications, the electronic device in the power module may also adopt a power MOS transistor, and fig. 2 is a schematic circuit diagram of another power MOS transistor module, which includes: the power MOS transistor M1 as the upper bridge arm, the power MOS transistor M2 as the lower bridge arm, wherein the drain electrode of the power MOS transistor M1 is connected with the positive electrode p + of the power module, the source electrode of the power MOS transistor M1 is connected with the drain electrode of the power MOS transistor M2, the source electrode of the power MOS transistor M2 is connected with the negative electrode p-of the power module, the source electrode of the power MOS transistor M1 and the drain electrode of the power MOS transistor M2 are commonly connected with the output terminal of the power module. In addition, the reverse conducting type IGBT and the power MOS have the same structure and function, and because a diode is built in, a reverse parallel diode is not needed, and the module design and structure are similar to those of the power MOS, and are not described herein again.
In practical applications, parasitic inductance has been a major problem to be overcome in power electronic device applications, especially in high-frequency and high-power applications of power MOS transistors. Parasitic inductance inside the module can cause overvoltage in the turn-off process, and the parasitic inductance can cause voltage spike and waveform oscillation in the switching process of the power module, so that electromagnetic interference and switching loss are increased, and even the module is damaged.
Disclosure of Invention
The invention provides a novel electrode capacitor for solving the problems in the prior art, which comprises: the capacitor comprises a first capacitor bus, a second capacitor bus, a capacitor group, a first capacitor leading-out electrode main body, a first capacitor leading-out electrode connecting part, a third capacitor leading-out electrode connecting part, a second capacitor leading-out electrode main body, a second capacitor leading-out electrode connecting part and a fourth capacitor leading-out electrode connecting part; the capacitor group is arranged between the first capacitor bus bar and the second capacitor bus bar, and the first capacitor leading-out electrode main body is flaky, is led out from the end part of the first capacitor bus bar and extends towards the direction of the second capacitor bus bar; the second capacitor leading-out electrode main body is flaky, is led out from the end part of the second capacitor bus bar and extends towards the first capacitor bus bar; the first capacitor extraction electrode main body and the second capacitor extraction electrode main body are arranged in a laminated and separated mode; the first capacitor leading-out electrode connecting part is led out from the end part of the first capacitor leading-out electrode main body close to the second capacitor bus bar and extends towards the direction far away from the capacitor bank; the second capacitor leading-out electrode connecting part is led out from the second capacitor leading-out electrode main body, crosses the first capacitor leading-out electrode main body and extends in the direction away from the capacitor bank, and the first capacitor leading-out electrode connecting part and the second capacitor leading-out electrode connecting part are adjacently arranged side by side.
Further, an insulating layer is arranged between the first capacitor lead-out electrode main body and the second capacitor lead-out electrode main body.
Further, an insulating layer is provided between the second capacitor lead-out electrode connecting portion and the first capacitor lead-out electrode main body.
Further, the second capacitor lead-out electrode connecting portion is formed by punching and bending the second capacitor lead-out electrode main body according to a predetermined shape.
Furthermore, a single first capacitor leading-out electrode connecting part and a single second capacitor leading-out electrode connecting part which are adjacently arranged side by side form a capacitor leading-out electrode connecting group, and the number of the capacitor leading-out electrode connecting groups is three.
Furthermore, the third capacitor leading-out electrode connecting part is led out from one side of the first capacitor leading-out electrode main body and extends towards the direction far away from the capacitor bank, the fourth capacitor leading-out electrode connecting part is led out from one side of the second capacitor leading-out electrode main body and extends towards the direction far away from the capacitor bank, and the third capacitor leading-out electrode connecting part and the fourth capacitor leading-out electrode connecting part are adjacently arranged side by side.
Furthermore, the first capacitor leading-out electrode connecting part and the second capacitor leading-out electrode connecting part are both provided with nuts used for being connected with an external power module.
The invention also provides a power module, which comprises the novel electrode capacitor and the power module, wherein the power module comprises a first power electrode and a second power electrode, the first power electrode is fixedly connected with the first capacitor leading-out electrode connecting part, and the second power electrode is fixedly connected with the second capacitor leading-out electrode connecting part.
Furthermore, the number of the power modules is three, and the first power electrode and the second power electrode of each power module are fixedly connected with the corresponding capacitor leading-out electrode connecting group. The parasitic inductance of the whole power module can be effectively reduced.
Drawings
Fig. 1 is a schematic circuit diagram of a conventional power module;
FIG. 2 is a circuit schematic of another prior art power module;
FIG. 3 is a perspective view of a novel electrode capacitor according to the present invention;
FIG. 4 is a partial block diagram of a novel electrode capacitor according to the present invention;
FIG. 5 is a partial block diagram of a novel electrode capacitor according to the present invention;
FIG. 6 is a partial block diagram of a novel electrode capacitor according to the present invention;
fig. 7 is a structural diagram of a power module according to the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A novel electrode capacitor as provided in fig. 3 and 4, comprising: the capacitor comprises a first capacitor bus bar 10, a second capacitor bus bar 20, a capacitor group 30, a first capacitor leading-out electrode main body 11, a first capacitor leading-out electrode connecting part 12, a third capacitor leading-out electrode connecting part 13, a second capacitor leading-out electrode main body 21, a second capacitor leading-out electrode connecting part 22 and a fourth capacitor leading-out electrode connecting part 23; the capacitor group 30 is arranged between the first capacitor bus bar 10 and the second capacitor bus bar 20, the first capacitor leading-out electrode main body 11 is flaky, and is led out from the end part of the first capacitor bus bar 10 and extends towards the direction of the second capacitor bus bar 20; the second capacitor leading-out electrode main body 21 is in a sheet shape, is led out from the end part of the second capacitor bus bar 20 and extends towards the direction of the first capacitor bus bar 10; the first capacitance extraction electrode main body 11 and the second capacitance extraction electrode main body 21 are arranged in a laminated and separated mode; the first capacitor leading-out electrode connecting part 12 is led out from the end part of the first capacitor leading-out electrode main body 11 close to the second capacitor bus bar 20 and extends towards the direction far away from the capacitor bank 30; the second capacitor leading-out electrode connecting portion 22 is led out from the second capacitor leading-out electrode main body 21, crosses over the first capacitor leading-out electrode main body 11, and extends in a direction away from the capacitor bank 30, specifically, in practical application, the second capacitor leading-out electrode connecting portion 22 can cross over from one side of the first capacitor leading-out electrode main body 11, and can cross over from the first capacitor leading-out electrode main body 11 according to practical requirements, it is required to ensure that the second capacitor leading-out electrode connecting portion 22 and the first capacitor leading-out electrode main body 11 are mutually insulated, and the first capacitor leading-out electrode connecting portion 12 and the second capacitor leading-out electrode connecting portion 22 are adjacently arranged side by side.
Specifically, as a further improvement of the above technical solution, an insulating layer is disposed between the first capacitor leading electrode main body 11 and the second capacitor leading electrode main body 21 to enhance the stability of mutual insulation between the first capacitor leading electrode main body 11 and the second capacitor leading electrode main body 21.
Specifically, as a further improvement of the above technical solution, an insulating layer is disposed between the second capacitor leading electrode connecting portion 22 and the first capacitor leading electrode main body 11, so as to enhance the stability of mutual insulation between the second capacitor leading electrode connecting portion 22 and the first capacitor leading electrode main body 11.
Specifically, as a further improvement of the above technical solution, as shown in fig. 5, the second capacitor leading electrode connecting portion 22 is formed by pressing and bending the second capacitor leading electrode main body 21 in a predetermined shape. The purposes of simplifying the processing technology, simplifying the structure, reducing the volume and saving materials are achieved.
Specifically, as a further improvement of the above technical solution, as shown in fig. 3 and 7, a single first capacitor lead-out electrode connection portion 12 and a single second capacitor lead-out electrode connection portion 22 which are adjacently arranged side by side constitute a capacitor lead-out electrode connection group, and the number of the capacitor lead-out electrode connection groups is three; specifically, in practical application, the number of the capacitor leading-out electrode connection groups is not limited to three, and one or more capacitor leading-out electrode connection groups can be freely arranged according to actual requirements.
Specifically, as a further improvement of the above-described technical solution, as shown in fig. 3 to 5, the third capacitor leading electrode connecting portion 13 is led out from one side of the first capacitor leading electrode main body 11 and extends in a direction away from the capacitor group 30, the fourth capacitor leading electrode connecting portion 23 is led out from one side of the second capacitor leading electrode main body 21 and extends in a direction away from the capacitor group 30, and the third capacitor leading electrode connecting portion 13 and the fourth capacitor leading electrode connecting portion 23 are disposed adjacent to each other and in parallel.
Specifically, as a further improvement of the above technical solution, as shown in fig. 3, the first capacitor lead-out electrode connecting portion 12 and the second capacitor lead-out electrode connecting portion 22 are each provided with a nut for connecting with an external power module.
Specifically, as a further application of the above technical solution, as shown in fig. 7, the present invention further provides a power module, which includes the novel electrode capacitor 100 and the power module 200 provided in the above technical solution, where the power module includes a first power electrode 201 and a second power electrode 202, the first power electrode 201 is fixedly connected to the first capacitor leading-out electrode connecting portion 12, and the second power electrode 202 is fixedly connected to the second capacitor leading-out electrode connecting portion 22.
Specifically, the number of the power modules 200 is three, and the first power electrode 201 and the second power electrode 202 of each power module are fixedly connected to the corresponding capacitor leading-out electrode connection group. The parasitic inductance of the whole power module can be effectively reduced; specifically, in practical applications, the number of the power modules 200 is not limited to three, and one or more power modules may be freely arranged corresponding to the capacitor leading-out electrode connection group according to practical requirements.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A novel electrode capacitor, comprising: the capacitor comprises a first capacitor bus, a second capacitor bus, a capacitor group, a first capacitor leading-out electrode main body, a first capacitor leading-out electrode connecting part, a third capacitor leading-out electrode connecting part, a second capacitor leading-out electrode main body, a second capacitor leading-out electrode connecting part and a fourth capacitor leading-out electrode connecting part; the capacitor group is arranged between the first capacitor bus bar and the second capacitor bus bar, and the first capacitor leading-out electrode main body is flaky, is led out from the end part of the first capacitor bus bar and extends towards the direction of the second capacitor bus bar; the second capacitor leading-out electrode main body is flaky, is led out from the end part of the second capacitor bus bar and extends towards the first capacitor bus bar; the first capacitor extraction electrode main body and the second capacitor extraction electrode main body are arranged in a laminated and separated mode; the first capacitor leading-out electrode connecting part is led out from the end part of the first capacitor leading-out electrode main body close to the second capacitor bus bar and extends towards the direction far away from the capacitor bank; the second capacitor leading-out electrode connecting part is led out from the second capacitor leading-out electrode main body, crosses the first capacitor leading-out electrode main body and extends in the direction away from the capacitor bank, and the first capacitor leading-out electrode connecting part and the second capacitor leading-out electrode connecting part are adjacently arranged side by side.
2. The novel electrode capacitor as claimed in claim 1, wherein: an insulating layer is arranged between the first capacitor leading-out electrode main body and the second capacitor leading-out electrode main body.
3. The novel electrode capacitor as claimed in claim 1, wherein: an insulating layer is arranged between the second capacitor leading-out electrode connecting part and the first capacitor leading-out electrode main body.
4. The novel electrode capacitor as claimed in claim 1, wherein: the second capacitor extraction electrode connecting part is formed by punching and bending the second capacitor extraction electrode main body according to a preset shape.
5. The novel electrode capacitor as claimed in claim 1, wherein: and the three capacitor leading-out electrode connecting groups are formed by a single first capacitor leading-out electrode connecting part and a single second capacitor leading-out electrode connecting part which are adjacently arranged side by side.
6. The novel electrode capacitor as claimed in claim 1, wherein: the third capacitor leading-out electrode connecting part is led out from one side of the first capacitor leading-out electrode main body and extends towards the direction far away from the capacitor bank, the fourth capacitor leading-out electrode connecting part is led out from one side of the second capacitor leading-out electrode main body and extends towards the direction far away from the capacitor bank, and the third capacitor leading-out electrode connecting part and the fourth capacitor leading-out electrode connecting part are adjacently arranged side by side.
7. The novel electrode capacitor as claimed in claim 1, wherein: and the first capacitor leading-out electrode connecting part and the second capacitor leading-out electrode connecting part are both provided with nuts used for being connected with an external power module.
8. A power module, comprising: the novel electrode capacitor and power module comprises a first power electrode and a second power electrode, wherein the first power electrode is fixedly connected with a first capacitor leading-out electrode connecting part, and the second power electrode is fixedly connected with a second capacitor leading-out electrode connecting part.
9. A power module as claimed in claim 8, wherein: the number of the power modules is three, and the first power electrode and the second power electrode of each power module are fixedly connected with the corresponding capacitor leading-out electrode connecting group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110379763.1A CN113314345A (en) | 2021-04-08 | 2021-04-08 | Novel electrode capacitance and power module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110379763.1A CN113314345A (en) | 2021-04-08 | 2021-04-08 | Novel electrode capacitance and power module |
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| Publication Number | Publication Date |
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| CN113314345A true CN113314345A (en) | 2021-08-27 |
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| CN202110379763.1A Pending CN113314345A (en) | 2021-04-08 | 2021-04-08 | Novel electrode capacitance and power module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114255996A (en) * | 2021-12-22 | 2022-03-29 | 北京国家新能源汽车技术创新中心有限公司 | Novel high-voltage ceramic bus supporting capacitor for automobile inverter |
-
2021
- 2021-04-08 CN CN202110379763.1A patent/CN113314345A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114255996A (en) * | 2021-12-22 | 2022-03-29 | 北京国家新能源汽车技术创新中心有限公司 | Novel high-voltage ceramic bus supporting capacitor for automobile inverter |
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