CN202135072U - Inverted power supply main circuit unit device with module parallelly connected - Google Patents

Inverted power supply main circuit unit device with module parallelly connected Download PDF

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Publication number
CN202135072U
CN202135072U CN201120282346U CN201120282346U CN202135072U CN 202135072 U CN202135072 U CN 202135072U CN 201120282346 U CN201120282346 U CN 201120282346U CN 201120282346 U CN201120282346 U CN 201120282346U CN 202135072 U CN202135072 U CN 202135072U
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CN
China
Prior art keywords
power
unit
pressure laminating
parallel
module
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201120282346U
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Chinese (zh)
Inventor
卢胜利
刘钊
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GLARUN POWER CO Ltd
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GLARUN POWER CO Ltd
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Priority to CN201120282346U priority Critical patent/CN202135072U/en
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Publication of CN202135072U publication Critical patent/CN202135072U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to an inverted power supply main circuit unit device with modules parallelly connected. Power devices (quantity is no smaller than 2) of the same inversion unit are fixed on a radiator (1), each radiator outlet abuts a blower fan, a power device driving module (3) is connected onto the power device, a low inductance buffer absorption capacitor (4) is arranged at an input end of the power device, the power devices of the same inversion unit are parallelly connected via a high voltage laminated mother board (5), an electrolytic capacitor group (7) and a voltage equalizing resistor (8) are both arranged on a PCB (6), shape of the PCB matches with shapes of an anode-cathode screw hole (13) and the high voltage laminated mother board, the PCB is fixed at an upper portion of the high voltage laminated mother board and is parallel with the plane where the power device is located, the PCB is not only connected with the high voltage laminated mother board in the unit and is also connected with a high voltage laminated mother board of an adjacent unit, an input bus row (9) is fixed at an upper portion of the high voltage laminated mother board, and the input bus row is parallelly connected with the laminated mother boards of various units.

Description

A kind of inverter main circuit unit device of module parallel connection
Technical field
The utility model relates to a kind of cell arrangement of photovoltaic inverter main circuit of many power models parallel connection.
Background technology
Photovoltaic power generation technology occupies critical role in the utilization of regenerative resource, development in recent years is swift and violent, and its power grade also strides forward the high-power and super high power of power station type from the family expenses small-power rapidly.The lifting inevitable requirement of power grade increases power device capacity and radiating element volume.Yet owing to the power that every IGBT module can be born is limited, adopt the mode of many modules parallel connections to improve the power device capacity usually, this is just improving difficulty to main circuit design aspect module current-sharing and the volume.
The main circuit structure of high-power photovoltaic DC-to-AC converter adopts dual mode usually in being applied at present: a kind of is integrated design; Promptly all power devices, radiator, electric capacity, bus row all are integrated in an integral module; Can produce the problem that the circuit unit volume is big, heat radiation is inhomogeneous, the cabinet space utilance is low like this; Because module whole is heavier, will propose the requirement on more equipment simultaneously, improve product cost installation and maintenance; Another kind of mode is modularized design; The filter capacitor module that is each phase is directly parallelly connected nearby with power tube; Three-phase after the parallel connection links together and receives on the DC power supply, and this mode is because the DC side connection line is longer, and distributed inductance is bigger; And, cause the electric capacity utilance lower nearby because each phase filter capacitor group fails to be connected in parallel.
The utility model content
Technical problem to be solved: the inverter cellular structure that a kind of many power models parallel connection is provided to above not enough the utility model; Its bus row compact conformation, the circuit stray inductance is little, the electric capacity utilance high, and thermal diffusivity is good, space availability ratio is high, convenient for installation and maintenance.
Technical scheme:
The utility model is realized through following technical scheme: a kind of inverter main circuit unit device of module parallel connection is characterized in that: the inversion unit and the inlet highway row that comprise three series of modular; Every group of inversion unit comprises that all radiator, power device, power device driver module, buffering absorb electric capacity, high pressure laminating busbar, pcb board, electrochemical capacitor group, grading resistor; Every group of inversion unit comprises that all quantity is more than or equal to two power device; The power device of same inversion unit is fixed on the radiator, each radiator outlet butt joint blower fan, and the power device driver module is connected the power device surface, and low inductance buffering absorbs the input that electric capacity is arranged on power device; The high pressure laminating busbar is connected in parallel the power device in the same inversion unit; Electrochemical capacitor group and grading resistor are arranged on the pcb board, and the shape of the shape of pcb board and both positive and negative polarity screw and high pressure laminating busbar is complementary; Pcb board is fixed in high pressure laminating busbar top, and is parallel to plane, power device place; Pcb board not only with the unit in the high pressure laminating busbar link to each other, and link to each other with the high pressure laminating busbar of adjacent cells; Inlet highway row is fixed in high pressure laminating busbar top, and the laminated bus bars in inlet highway row and each unit is connected in parallel.
Described electrochemical capacitor group comprises the capacitance group of two series connection; And every group of capacitance group comprises that quantity more than or equal to one electric capacity, is parallel connection between electric capacity, grading resistor of each capacitance group parallel connection.
Described high pressure laminating busbar comprises anodal stack bus bar and negative pole stack bus bar; Between two busbars an insulation board is arranged, the upper and lower part of anodal stack bus bar and negative pole stack bus bar all offers the screw that is parallel to the IGBT module flat, screwhole position be complementary by the pin of power device.
Beneficial effect:
The utility model adopts cellular structure with every phase module design, effectively splits power cell weight, is convenient to streamline production and is easy to installation and maintenance.Each unit adopts independent ventiduct, makes whole device radiation even, has promoted radiating effect.Stack bus bar, power model and capacitor board adopt stepped construction, make the unit inner structure compact, and space availability ratio is high, has reduced the inductance coefficent between bus simultaneously, reduces the influence of distributed inductance and switching spike.Many IGBT modules in the same unit are connected in parallel through stack bus bar, and each blocks current path proximity is beneficial to the parallel current-sharing of intermodule, and have stronger extensibility.The filter capacitor group of each phase not only with this unit in the IGBT module be connected nearby, and be connected in parallel nearby with the capacitance group of adjacent cells, connecting line is short out, has improved the dc filter capacitor utilance.Grading resistor is parallelly connected with capacitance group through pcb board welding, connects reliable and securely, and the resistance root is frangible or become flexible not.Low inductance buffering absorbs electric capacity and directly is mounted on the power device input, has effectively promoted its buffering absorbability.
Description of drawings
Fig. 1 is the structural representation of utility model;
Fig. 2 is a stack bus bar structural representation in the unit.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further to describe.
Extremely shown in Figure 2 like Fig. 1; Wherein, 1 is radiator, 2 be power device, 3 for the power device driver module, 4 for buffering absorb electric capacity, 5 for the high pressure laminating busbar, 6 for pcb board, 7 for electrochemical capacitor group, 8 for grading resistor, 9 for inlet highway row, 10 for anodal stack bus bar, 11 for insulation board, 12 be negative pole stack bus bar, both positive and negative polarity screw 13, screw 14.
The inverter main circuit unit device of a kind of module parallel connection comprises that the inversion unit of three series of modular and inlet highway arrange 9.Every group of inversion unit comprises that all radiator 1, power device 2, power device driver module 3, buffering absorb electric capacity 4, height
Press stack bus bar 5, pcb board 6, electrochemical capacitor group 7, grading resistor 8.
Every group of inversion unit comprises that all many (quantity is more than or equal to two) power devices 2 are used to expand power capacity, adopts three devices mode that is connected in parallel in this example; Many the power devices 2 of same inversion unit are fixed on the radiator 1; Blower fan can be docked in each radiator 1 exit position; Power device driver module 3 straight cuttings are welded on power device 2 surfaces, and low inductance buffering absorbs the input that electric capacity 4 directly is mounted on power device 2; High pressure laminating busbar 5 is connected in parallel many power devices 2 in the same inversion unit; Electrochemical capacitor group 7 comprises the capacitance group of two series connection; And every group of capacitance group comprises that quantity more than or equal to one electric capacity, is parallel connection between electric capacity, grading resistor 8 of each capacitance group parallel connection.Electrochemical capacitor group 7 and grading resistor 8 welded and installed are on pcb board 6, and the shape of pcb board 6 and both positive and negative polarity screw 13 are confirmed by the shape of high pressure laminating busbar 5; Pcb board 6 is fixed in high pressure laminating busbar 5 tops through double-screw bolt, and is parallel to plane, power device 2 place, pcb board 6 not only with the unit in high pressure laminating busbar 5 link to each other, and link to each other with the high pressure laminating busbar 5 of adjacent cells.
As shown in Figure 2, high pressure laminating busbar 5 comprises anodal stack bus bar 10 and negative pole stack bus bar 12; One insulation board 11 is arranged between two busbars, and the upper and lower part of anodal stack bus bar 10 and negative pole stack bus bar 12 all offers a plurality of screws 14 that are parallel to the IGBT module flat, and screw 14 positions are confirmed by the pin of employing power device 2; Inlet highway row 9 is fixed in high pressure laminating busbar 5 tops through double-screw bolt, and the photovoltaic DC power supply that makes outside input is connected in parallel with laminated bus bars 5 in each unit through inlet highway row 9.

Claims (3)

1. the inverter main circuit unit device of a module parallel connection is characterized in that: the inversion unit and the inlet highway row (9) that comprise three series of modular; Every group of inversion unit comprises that all radiator (1), power device (2), power device driver module (3), buffering absorb electric capacity (4), high pressure laminating busbar (5), pcb board (6), electrochemical capacitor group (7), grading resistor (8); Every group of inversion unit comprises that all quantity is more than or equal to two power device (2); The power device of same inversion unit (2) is fixed on the radiator (1); Each radiator (1) outlet butt joint blower fan; Power device driver module (3) is connected power device (2) surface, and low inductance buffering absorbs the input that electric capacity (4) is arranged on power device (2); High pressure laminating busbar (5) is connected in parallel the power device in the same inversion unit (2); Electrochemical capacitor group (7) and grading resistor (8) are arranged on the pcb board (6), and the shape of pcb board (6) and both positive and negative polarity screw (13) are complementary with the shape of high pressure laminating busbar (5); Pcb board (6) is fixed in high pressure laminating busbar (5) top, and is parallel to plane, power device (2) place; Pcb board (6) not only with the unit in high pressure laminating busbar (5) link to each other, and link to each other with the high pressure laminating busbar (5) of adjacent cells; Inlet highway row (9) is fixed in high pressure laminating busbar (5) top, and the laminated bus bars (5) in inlet highway row (9) and each unit is connected in parallel.
2. the inverter main circuit unit device of a kind of module parallel connection according to claim 1, it is characterized in that: described electrochemical capacitor group (7) comprises the capacitance group of two series connection; And every group of capacitance group comprises that quantity more than or equal to one electric capacity, is parallel connection between electric capacity, each capacitance group parallel connection grading resistor (8).
3. the inverter main circuit unit device of a kind of module parallel connection according to claim 1, it is characterized in that: described high pressure laminating busbar (5) comprises anodal stack bus bar (10) and negative pole stack bus bar (12); One insulation board (11) is arranged between two busbars, and the upper and lower part of anodal stack bus bar (10) and negative pole stack bus bar (12) all offers the screw (14) that is parallel to the IGBT module flat, screw (14) position be complementary by the pin of power device (2).
CN201120282346U 2011-08-05 2011-08-05 Inverted power supply main circuit unit device with module parallelly connected Expired - Fee Related CN202135072U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201120282346U CN202135072U (en) 2011-08-05 2011-08-05 Inverted power supply main circuit unit device with module parallelly connected

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Application Number Priority Date Filing Date Title
CN201120282346U CN202135072U (en) 2011-08-05 2011-08-05 Inverted power supply main circuit unit device with module parallelly connected

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103036221A (en) * 2012-12-04 2013-04-10 华为技术有限公司 Bus capacitance module and power unit
CN103368359A (en) * 2012-04-11 2013-10-23 台达电子工业股份有限公司 Converter power unit and busbar thereof
CN103730912A (en) * 2013-12-30 2014-04-16 广东志成冠军集团有限公司 Photovoltaic grid-connected inverter with module design structure
CN103825479A (en) * 2014-02-20 2014-05-28 华为技术有限公司 Power converter
CN104218817A (en) * 2013-05-31 2014-12-17 台达电子企业管理(上海)有限公司 Variable-frequency power circuit and direct-current energy storing device
CN106133908A (en) * 2014-10-10 2016-11-16 富士电机株式会社 Semiconductor device and busbar
CN106653368A (en) * 2017-01-06 2017-05-10 上海鹰峰电子科技股份有限公司 Water-cooling type thin film capacitor
CN106803504A (en) * 2015-11-25 2017-06-06 富士电机株式会社 Semiconductor device
CN108615724A (en) * 2018-05-08 2018-10-02 西安交通大学 A kind of micro- sense type IGBT parallel current-sharing structures
US10128625B2 (en) 2014-11-18 2018-11-13 General Electric Company Bus bar and power electronic device with current shaping terminal connector and method of making a terminal connector
CN108988658A (en) * 2018-07-02 2018-12-11 德威(苏州)新能源有限公司 A kind of super power frequency converter of doube bridge control
CN109119391A (en) * 2017-06-23 2019-01-01 矢崎总业株式会社 The fixture construction of electronic component
CN109600018A (en) * 2017-09-28 2019-04-09 西门子公司 A kind of current transformer

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103368359A (en) * 2012-04-11 2013-10-23 台达电子工业股份有限公司 Converter power unit and busbar thereof
CN103368359B (en) * 2012-04-11 2016-04-13 台达电子工业股份有限公司 Current transformer power unit and bus bar thereof
CN103036221A (en) * 2012-12-04 2013-04-10 华为技术有限公司 Bus capacitance module and power unit
CN103036221B (en) * 2012-12-04 2015-07-08 华为技术有限公司 Bus capacitance module and power unit
CN104218817B (en) * 2013-05-31 2017-03-29 台达电子企业管理(上海)有限公司 Frequency conversion power circuit and DC energy storage device
CN104218817A (en) * 2013-05-31 2014-12-17 台达电子企业管理(上海)有限公司 Variable-frequency power circuit and direct-current energy storing device
CN103730912A (en) * 2013-12-30 2014-04-16 广东志成冠军集团有限公司 Photovoltaic grid-connected inverter with module design structure
CN103730912B (en) * 2013-12-30 2016-02-03 广东志成冠军集团有限公司 A kind of photovoltaic combining inverter with modular design structure
US10103640B2 (en) 2014-02-20 2018-10-16 Huawei Technologies Co., Ltd. Power converter
CN103825479A (en) * 2014-02-20 2014-05-28 华为技术有限公司 Power converter
CN106133908B (en) * 2014-10-10 2018-12-25 富士电机株式会社 Semiconductor device and busbar
CN106133908A (en) * 2014-10-10 2016-11-16 富士电机株式会社 Semiconductor device and busbar
US10128625B2 (en) 2014-11-18 2018-11-13 General Electric Company Bus bar and power electronic device with current shaping terminal connector and method of making a terminal connector
CN106803504A (en) * 2015-11-25 2017-06-06 富士电机株式会社 Semiconductor device
CN106653368B (en) * 2017-01-06 2018-11-23 上海鹰峰电子科技股份有限公司 A kind of water-cooled thin film capacitor
CN106653368A (en) * 2017-01-06 2017-05-10 上海鹰峰电子科技股份有限公司 Water-cooling type thin film capacitor
CN109119391A (en) * 2017-06-23 2019-01-01 矢崎总业株式会社 The fixture construction of electronic component
CN109600018A (en) * 2017-09-28 2019-04-09 西门子公司 A kind of current transformer
CN109600018B (en) * 2017-09-28 2021-01-01 西门子公司 Current transformer
CN108615724A (en) * 2018-05-08 2018-10-02 西安交通大学 A kind of micro- sense type IGBT parallel current-sharing structures
CN108988658A (en) * 2018-07-02 2018-12-11 德威(苏州)新能源有限公司 A kind of super power frequency converter of doube bridge control
CN108988658B (en) * 2018-07-02 2020-06-30 德威(苏州)新能源有限公司 Super power frequency converter controlled by double bridges

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120201

Termination date: 20150805

EXPY Termination of patent right or utility model