CN101394137A - Inverter device - Google Patents
Inverter device Download PDFInfo
- Publication number
- CN101394137A CN101394137A CNA2008102110674A CN200810211067A CN101394137A CN 101394137 A CN101394137 A CN 101394137A CN A2008102110674 A CNA2008102110674 A CN A2008102110674A CN 200810211067 A CN200810211067 A CN 200810211067A CN 101394137 A CN101394137 A CN 101394137A
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- Prior art keywords
- semiconductor
- fuse
- positive
- negative
- terminal
- Prior art date
- 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.)
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Links
- 239000004065 semiconductor Substances 0.000 claims abstract description 65
- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 230000007935 neutral effect Effects 0.000 claims description 17
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
- H02H7/1225—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to internal faults, e.g. shoot-through
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/49—Combination of the output voltage waveforms of a plurality of converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention provides an inverter device, which comprises a semiconductor switch connected in series, a fuse arranged respectively on positive and negative DC terminals, and arranges a plurality of semiconductor units for each phase for arranging the mutual connection point of the semiconductor switch as AC terminal, wherein, in the inverter device for mutually inverting the AC and DC, the positive and negative DC terminals are respectively connected in parallel and connected with a DC capacitor, and the positive and negative fuses in each semiconductor unit are respectively and mutually connected in parallel with the connection point of the semiconductor switch, therefore, the current in the positive and negative fuses is equalized in the case of that one switch component is fail. Accordingly, in an inverter device formed by a plurality of switch components parallelly connected, so that the plurality of fuses are fused at definite time identically caused by short-circuit current to reduce flowing current due to short-circuit load, so as to prevent loss expansion and reduce failure position.
Description
Technical field
The DC-to-AC converter that the present invention relates to be connected in parallel a plurality of switch elements and constitute.
Background technology
In the past, under the situation of the rated current deficiency of the switch element that constitutes power converter, be connected in parallel a plurality of switch elements and the technology that constitutes power converter widely known to.Record in [patent documentation 1] about 3 phase inverters by using 6 arms to constitute, wherein, with a plurality of being connected in parallel of device of be connected in series switch element and fuse and constitute 1 arm.By such formation, on the basis that not enough rated current strengthens in can be with 1 element, owing to can an element be disconnected from main circuit by fuse when element fault at every turn, the broken parts during therefore with fault is limited in Min..
[patent documentation 1] TOHKEMY 2005-160244 communique
But in the DC-to-AC converter of high-voltage large-capacity, under the situation that switch element breaks down, with fuse blows, it is difficult to become on the performance of fuse before the switch element to arm that short circuit current flows damages.Therefore, in a plurality of switch elements that are connected in parallel under situation about breaking down, have sometimes with fuse blows that this fault element is connected before because short circuit current and situation that a plurality of switch elements of arm are damaged.At this moment, owing to a plurality of fuses that arm is connected in short circuit current flow so not fusing and staying of each fuse.Afterwards, there is the possibility that the switch element of arm and other diode elements mutually load short circuits are taken place and enlarge fault by having damaged.
Summary of the invention
The present invention produces for addressing the above problem, the objective of the invention is to, in the DC-to-AC converter that a plurality of switch elements is connected in parallel and constitutes, when the fault of switch element, make that expansion and minimizing fault place avoid damage because the fusing of a plurality of fuses that short circuit current fuses is regularly consistent reduces because load short circuits and mobile electric current.
For achieving the above object, inverter of the present invention, comprise the semiconductor switch that is connected in series and the fuse on positive and negative dc terminal respectively, and each is provided with the semiconductor unit that a plurality of interlinkages with semiconductor switch are made as ac terminal mutually, and direct current and alternating current are reciprocally changed, this DC-to-AC converter is characterised in that, positive and negative dc terminal reciprocally is connected in parallel respectively and is connected with direct current capacitor, and the positive and negative fuse in each semiconductor unit and the tie point of semiconductor switch reciprocally are connected in parallel respectively, thus, when a switch element breaks down, make the electric current equalization that in positive and negative fuse, flows.
And, for achieving the above object, the present invention's 3 grades of DC-to-AC converter of neutral point clamper type for each is provided with a plurality of semiconductor units mutually and direct current and alternating current are reciprocally changed, above-mentioned semiconductor unit comprises four semiconductor switchs that are connected in series, two diodes that are connected in series and the DC-to-AC converter of the fuse on the dc terminal of positive and negative and neutral point respectively, positive and negatively reciprocally be connected in parallel respectively with the dc terminal of neutral point and be connected with direct current capacitor, and the positive and negative and fuse of neutral point in each semiconductor unit and the tie point of semiconductor switch reciprocally are connected in parallel respectively, thereby when a switch element breaks down, the electric current equalization that will in positive and negative fuse, flow.
According to DC-to-AC converter of the present invention, when a switch element breaks down, prevent load short circuits, the expansion that therefore also can realize avoiding damage, minimizing fault place owing to can roughly fuse simultaneously by positive and negative whole fuse with the fault phase.
And, according to DC-to-AC converter of the present invention, when a switch element of 3 grades of DC-to-AC converter of neutral point clamper type breaks down, prevent load short circuits owing to can roughly fuse simultaneously, the expansion that therefore also can realize avoiding damage, minimizing fault place by positive and negative whole fuse with the fault phase.
Description of drawings
Fig. 1 is the circuit diagram that illustrates the DC-to-AC converter of the present invention's the 1st execution mode.
Fig. 2 is the figure that the work of the inverter circuit that does not possess connecting bus is described.
Fig. 3 is the figure that the work of the inverter circuit that possesses connecting bus is described.
Fig. 4 is the circuit diagram that illustrates other DC-to-AC converter of the present invention's the 1st execution mode.
Fig. 5 is the circuit diagram that illustrates the DC-to-AC converter of the present invention's the 2nd execution mode.
[symbol description]
11 input ac power terminals
12 rectifiers
13 smmothing capacitors
14 inverter circuits
15 semiconductor units
16 loads
21～24 switch elements
25,26 diodes
31～33 fuses (fuse)
41～43 connecting bus
Embodiment
Below, adopt description of drawings for embodiments of the present invention.
(the 1st execution mode)
Fig. 1 is the circuit diagram of the signal DC-to-AC converter relevant with the 1st execution mode of the present invention.Among Fig. 1, in the DC-to-AC converter,, in rectifier 12, convert this alternating current to direct current, adopt smmothing capacitor 13 to carry out smoothing from input terminal 11 input AC electricity.In inverter circuit 14, the direct current that obtains is converted to alternating current, and supplies with alternating current for load 16 by carrying out switch.
Further, in the present embodiment, the fuse in two semiconductor units 15 of a phase of formation and the tie point of switch element are reciprocally coupled together by connecting bus 41,42.
Below, for the reason that connecting bus 41,42 is set, compare with the situation that does not have a connecting bus and to describe in detail.
Fig. 2 is the key diagram of the work when 1 fault takes place switch element under not having the situation of connecting bus.For the sake of simplicity, only select two-phase in the inverter circuit, annotating identical symbol on the part identical with Fig. 1.Semiconductor unit 14a is connected in parallel with 14b and constitutes a direction mutually, being connected in parallel and constituting of another one direction by semiconductor unit 14a and 14b.And load 16 is made of internal emf 161 and inductance 162.The work that Fig. 2 (a)～Fig. 2 (d) signal changes along with effluxion.
Among Fig. 2 (a), switch element 22a, 22b, 21c, 21d connect in 8 switch elements.Here, if direct-current short circuit because some reason and the fault that is short-circuited, then takes place by the switch element 21a that breaks down and switch element 22a, the 22b of connection in switch element 21a.
So, as Fig. 2 (b), owing to excessive short circuit current switch element 22a, 22b breaks down, and fuse 31a fusing.If fuse 31a fuses early; though then switch element 22a, 22b do not break down and finish; but, so before breaking down, be difficult to the protection switch element during direct-current short circuit because the fuse that generally is difficult to make high-voltage large-capacity use has promptly disconnected characteristic.And in order to shunt short circuit current, fuse 32a, 32b are little owing to comparing the mobile electric current of fuse 31a, thereby fuse evening, and owing to the short circuit current that fuses from fuse 31a is cut off, so fuse 32a, 32b do not have to fuse and stay.
Then, shown in Fig. 2 (c), by with other mutually switch element 22c, the diode of 22d load short circuits taking place from switch element 22a, 22b that fault has taken place later on, because the accumulative total of direct-current short circuit electric current and load short circuit current, fuse 32a, 32b fuse.At this moment, if load short circuit current is big, then switch element 22c, 22d have the danger of breaking down.
Further, if load short circuit current is big,, therefore there is as Fig. 2 (d) by the diode of switch element 21b the danger of smmothing capacitor 13 being overcharged and becoming overvoltage of direct current then because the savings of load inductance 162 is can quantitative change big.
For this, adopt Fig. 3 to describe for the work of the situation that connecting bus is set.Fig. 3 is also identical with Fig. 2, selects the two-phase of inverter circuit, and is different with Fig. 2, and connecting bus 41a, 42a, 41c, 42c are set.Among Fig. 3 (a), if switch element 21a owing to some reason fault that is short-circuited, then direct-current short circuit takes place in the switch element 21a by fault has taken place and switch element 22a, the 22b of connection.
So, shown in Fig. 3 (b), though because short circuit current switch element 22a, 22b break down, but for fuse, because effect by connecting bus 41a, short circuit current is shunted to fuse 31a, 31b, therefore becomes electric current and above-mentioned four the fuses roughly simultaneously fusing equal with fuse 32a, 32b.So shown in Fig. 3 (c), whole current paths are cut off, this above influence does not take place.
Above-mentioned four fuses, though strictly the retention time differs from and fuses, but, by short circuit current is flowed as far as possible fifty-fifty, time difference till reducing to fuse, thereby can shorten the continuation time of load short circuits, therefore can with to the load short circuit current of other phases spread and afterwards DC voltage rising to suppress ground less.
In the execution mode of Fig. 1, though fuse 31,32 is set in the inside of semiconductor unit 15, but in the such semiconductor unit 15 of Fig. 4, do not comprise fuse, the positive and negative bus of semiconductor unit 15 and inverter circuit 14 is connected by fuse 31,32, also can be by every connecting bus 41,42 that is provided with mutually on the tie point of semiconductor unit 15 and fuse 31,32.
And, though in the execution mode of Fig. 1, per 1 two semiconductor units that are in parallel under the 3 above situations in parallel, reciprocally are connected by every phase by the tie point with fuse and switch element, can obtain identical effect.
As mentioned above, according to present embodiment, in the DC-to-AC converter that constitutes being connected in parallel semiconductor unit, under the situation that switch element breaks down, owing to faulty component can be separated from main circuit exactly, it is less therefore the fault place can be suppressed ground.
(the 2nd execution mode)
Fig. 5 is the circuit diagram of the relevant DC-to-AC converter of signal the present invention the 2nd execution mode.For the additional identical mark of the component part identical with Fig. 1.The points different with Fig. 1 are, as inverter circuit 14, use suitable 3 grades of inverters of neutral point clamper type in the big capacity transducer.
Among Fig. 5, semiconductor unit 15 possesses four switch elements 21～24 that are connected in series and two diodes 25,26 that are connected in series, the 1st switch element 21 is by positive side the fuse 31 and 3 positive electrode bus connection of inverter circuit 14 mutually, and the 4th switch element 24 is by minus side the fuse 33 and 3 negative pole bus connection of inverter circuit 14 mutually.
The interlinkage of the 1st switch element 21 and the 2nd switch element 22, be connected with the 1st diode 25, the interlinkage of the 3rd switch element 23 and the 4th switch element 24 is connected with the 2nd diode 26, the interlinkage of the 1st diode 25 and the 2nd diode 26 by middle fuse 32 with 3 mutually the neutral point bus of inverter circuit 14 be connected.And, two semiconductor units 15 as one group, the 2nd reciprocally are connected with the tie point of the 3rd switch element with each, and are connected with load 16 as ac output end of 1 phase.
Further, in the present embodiment, the fuse in two semiconductor units 15 of a phase of formation and the tie point of switch element reciprocally connect by connecting bus 41,42,43.
In the present embodiment, the work of the situation that 1 switch element breaks down, identical with the situation of the 1st execution mode, by making the short circuit current that takes place owing to fault rely on the effect of connecting bus to be shunted equably to a plurality of fuses, reduce the time difference till the fusing of a plurality of fuses of being connected mutually with fault, thereby can shorten the continuation time of load short circuits, therefore can with to the load short circuit current of other phases spread and afterwards DC voltage rising to suppress ground less.
In the execution mode of Fig. 5, though the inside at semiconductor unit 15 is provided with fuse, but semiconductor unit 15 is connected by fuse with the bus of the positive and negative centre of inverter circuit 14, and also can be on the tie point of semiconductor unit according to every connecting bus that is provided with mutually, even under the situation more than 3 parallel connections, reciprocally be connected according to every phase by the tie point with fuse and switch element and can obtain identical effect, this is identical with the 1st execution mode.
As mentioned above, according to present embodiment, be connected in parallel semiconductor unit and in 3 grades of inverters of neutral point clamper type of constituting, under the situation that a switch element breaks down, can exactly faulty component be separated from circuit, so it is less the fault place can be suppressed ground.
The present invention can be applied to be connected in parallel switch element and the industry of the jumbo power converter that obtains with driving field and electrification field with transducer.
Claims (6)
1. DC-to-AC converter, comprise the semiconductor switch that is connected in series and the fuse on positive and negative dc terminal respectively, and each is provided with the semiconductor unit that a plurality of interlinkages with semiconductor switch are made as ac terminal mutually, and direct current and alternating current are reciprocally changed, this DC-to-AC converter is characterised in that
The ac terminal of a plurality of semiconductor units of above-mentioned each phase reciprocally is connected in parallel respectively and is connected with AC load, positive and negative dc terminal reciprocally is connected in parallel respectively and is connected with direct current capacitor, and each semiconductor unit in positive and negative fuse and the tie point of semiconductor switch reciprocally be connected in parallel respectively.
2. DC-to-AC converter, be the 3 grades of DC-to-AC converter of neutral point clamper type that each are provided with mutually a plurality of semiconductor units and direct current and alternating current are reciprocally changed, above-mentioned semiconductor unit comprises four semiconductor switchs being connected in series, two diodes that are connected in series and the fuse on the dc terminal of positive and negative and neutral point respectively, this DC-to-AC converter is characterised in that
The ac terminal of a plurality of semiconductor units of each phase reciprocally is connected in parallel respectively and is connected with AC load, positive and negatively reciprocally be connected in parallel respectively with the dc terminal of neutral point and be connected, and the fuse of the positive and negative and neutral point in each unit and the tie point of semiconductor switch reciprocally are connected in parallel respectively with direct current capacitor.
3. according to claim 1 or the described DC-to-AC converter of claim 2, it is characterized in that,
On the fuse in semiconductor unit and the tie point of semiconductor switch, be provided for connecting the terminal of connecting bus.
4. DC-to-AC converter, comprise the semiconductor switch that is connected in series and the fuse on positive and negative dc terminal respectively, and each is provided with the semiconductor unit that a plurality of interlinkages with semiconductor switch are made as ac terminal mutually, and direct current and alternating current reciprocally changed, it is characterized in that
The ac terminal of a plurality of semiconductor units of above-mentioned each phase reciprocally is connected in parallel respectively and is connected with AC load, positive and negative dc terminal reciprocally is connected in parallel respectively and is connected with direct current capacitor, and, be connected with the positive and negative fuse in other the semiconductor unit and the tie point of semiconductor switch with the positive and negative fuse in each semiconductor unit and the tie point of semiconductor switch.
5. DC-to-AC converter, be the 3 grades of DC-to-AC converter of neutral point clamper type that each are provided with mutually a plurality of semiconductor units and direct current and alternating current are reciprocally changed, above-mentioned semiconductor unit comprises four semiconductor switchs being connected in series, two diodes that are connected in series and the fuse on the dc terminal of positive and negative and neutral point respectively, this DC-to-AC converter is characterised in that
The ac terminal of a plurality of semiconductor units of each phase reciprocally is connected in parallel respectively and is connected with AC load, positive and negatively reciprocally be connected in parallel respectively with the dc terminal of neutral point and be connected with direct current capacitor, and, be connected with the fuse of positive and negative and neutral point in other unit and the tie point of semiconductor switch with the fuse of the positive and negative and neutral point in each unit and the tie point of semiconductor switch.
6. according to claim 4 or the described DC-to-AC converter of claim 5, it is characterized in that,
Use the link of connecting bus as above-mentioned fuse and semiconductor switch.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007243211 | 2007-09-20 | ||
| JP2007243211A JP5095330B2 (en) | 2007-09-20 | 2007-09-20 | Inverter device |
| JP2007-243211 | 2007-09-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101394137A true CN101394137A (en) | 2009-03-25 |
| CN101394137B CN101394137B (en) | 2013-01-23 |
Family
ID=40494262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102110674A Expired - Fee Related CN101394137B (en) | 2007-09-20 | 2008-08-20 | Inverter device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5095330B2 (en) |
| KR (1) | KR100994872B1 (en) |
| CN (1) | CN101394137B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118100A (en) * | 2010-01-05 | 2011-07-06 | 赛米控电子股份有限公司 | Circuit assembly for power semiconductor components |
| CN103427689B (en) * | 2012-05-25 | 2016-01-27 | 株式会社东芝 | DC-to-AC converter |
| CN106787742A (en) * | 2016-12-30 | 2017-05-31 | 西北核技术研究所 | A kind of series resonance charge power supply |
| JP2018148164A (en) * | 2017-03-09 | 2018-09-20 | 株式会社東芝 | Power semiconductor module |
| CN111264023A (en) * | 2017-10-25 | 2020-06-09 | 东芝三菱电机产业系统株式会社 | Power conversion device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5599757B2 (en) * | 2011-05-19 | 2014-10-01 | 株式会社日立製作所 | Power converter |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19639279C2 (en) | 1996-09-25 | 2002-01-17 | Daimlerchrysler Rail Systems | Converter circuit |
| JP3323106B2 (en) | 1996-10-16 | 2002-09-09 | 株式会社日立製作所 | Semiconductor power converter |
| JPH10243660A (en) * | 1997-02-26 | 1998-09-11 | Toshiba Corp | Power converting apparatus |
| JPH11144603A (en) * | 1997-11-11 | 1999-05-28 | Hitachi Ltd | Fuse and power conversion device using the same |
| JP2000295835A (en) * | 1999-04-02 | 2000-10-20 | Fuji Electric Co Ltd | Power converter |
| JP3926618B2 (en) * | 2001-12-17 | 2007-06-06 | 東芝三菱電機産業システム株式会社 | Power converter |
| JP2004248479A (en) * | 2003-02-17 | 2004-09-02 | Toshiba Corp | Three-level converter |
-
2007
- 2007-09-20 JP JP2007243211A patent/JP5095330B2/en not_active Expired - Fee Related
-
2008
- 2008-08-06 KR KR1020080076967A patent/KR100994872B1/en active IP Right Grant
- 2008-08-20 CN CN2008102110674A patent/CN101394137B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118100A (en) * | 2010-01-05 | 2011-07-06 | 赛米控电子股份有限公司 | Circuit assembly for power semiconductor components |
| CN102118100B (en) * | 2010-01-05 | 2015-04-01 | 赛米控电子股份有限公司 | Circuit assembly for power semiconductor components |
| CN103427689B (en) * | 2012-05-25 | 2016-01-27 | 株式会社东芝 | DC-to-AC converter |
| CN106787742A (en) * | 2016-12-30 | 2017-05-31 | 西北核技术研究所 | A kind of series resonance charge power supply |
| JP2018148164A (en) * | 2017-03-09 | 2018-09-20 | 株式会社東芝 | Power semiconductor module |
| CN111264023A (en) * | 2017-10-25 | 2020-06-09 | 东芝三菱电机产业系统株式会社 | Power conversion device |
| CN111264023B (en) * | 2017-10-25 | 2023-10-31 | 东芝三菱电机产业系统株式会社 | power conversion device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101394137B (en) | 2013-01-23 |
| JP5095330B2 (en) | 2012-12-12 |
| KR20090031212A (en) | 2009-03-25 |
| JP2009077504A (en) | 2009-04-09 |
| KR100994872B1 (en) | 2010-11-16 |
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