CN102315780B - Power source device - Google Patents
Power source device Download PDFInfo
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- CN102315780B CN102315780B CN201110205203.0A CN201110205203A CN102315780B CN 102315780 B CN102315780 B CN 102315780B CN 201110205203 A CN201110205203 A CN 201110205203A CN 102315780 B CN102315780 B CN 102315780B
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Abstract
The invention provides a power source device. A forward converter with a positive electrode, a neutral electrode and a negative electrode is used to convert the three-phase alternating current into the direct current, and a reverse converter is used to convert the direct current converted by the forward converter into the three-phase alternating current. The power source device comprises the forward converter, the reverse converter and a capacitor series circuit respectively connected with the positive electrode, the neutral electrode and the negative electrode of the forward converter, thereby forming the input-output non-insulated power source device. The power source device also comprises a common line, which connects a single-phase alternating current input, a single-phase alternating current output and the neutral electrode of the direct current part. The alternating current input of the forward converter is connected with two fuses, while the alternating current output of the reverse converter is connected with two fuses as well. In addition, a fuse is connected between the neutral electrode of the forward converter and the common line.
Description
Technical field
The present invention relates to the protective circuit of 3 phase input and output supply units.
Background technology
The circuit structure that adopts 3 phase input and output supply units of prior art has been shown in Fig. 1.The circuit example of following 3 above-mentioned phase input and output supply units: by forward converter (forward converter) 3, convert the interchange of 3 cross streams power supplys 1 to direct current, after being undertaken smoothly by capacitor 4, by reverse converter (inverter) 6, convert to and exchange and export.In the interchange input of forward converter 3, each is connected with respectively fuse 9,10,11 mutually, in their AC power 1 one sides, is connected with the AC input filter 2 by reactance coil (reactor) and capacitor formation.At the interchange outlet side of reverse converter 6, each is connected with respectively fuse 12,13,14 mutually, they with load 8 between be connected with by reactance coil, formed with capacitor exchange output filter 7.
Below, the protection action in such structure is described.The effect of the fuse 9～11 of the interchange input side of forward converter 3; comprise: when semiconductor elements such as forming the IGBT of forward converter 3, diode breaks down or during misoperation, play effect of blocking the overcurrent that (cut-off) flow out via AC input filter 2 from AC power 1, and by blocking of fuse, play in the situation that there is earth fault in the circuit of forward converter or the circuit of reverse converter the effect of protecting semiconductor element and circuit block.In addition, by blocking of fuse, play the effect of protecting reverse converter with each fuse 12～14 being connected of the interchange output of reverse converter 6 when load short circuits, overcurrent, the earth fault etc.
In patent documentation 1, recorded in the circuit structure and the protection action thereof that are respectively connected with the forward converter of fuse.Well-known, the circuit of reverse converter is the input circuit structure reciprocal with output that makes the circuit of forward converter, and the circuit structure of three-phase-three-phase inversion device becomes structure as shown in Figure 1.
As above above-mentioned, in existing three-phase-three-phase inversion circuit, in exchanging input and exchanging output, adopt 3 fuses respectively.On the basis of the supply unit in pie graph 1; protection uses fuse 9～14 when the fusing such as the fault because of fuse itself or loss; cause device output to stop; thereby operational reliability reduces; the fuse that electric power is used needs high speed Truncated fuse in order to protect semiconductor element; in view of its high price and the reason such as large-scale, wish that use number is the least possible.
[patent documentation 1] 11～No. 164560 communiques of Japanese kokai publication hei (Fig. 3)
Summary of the invention
Therefore, problem of the present invention is to reduce the use number of the fuse in three-phase-three-phase inversion device.
In order to solve above-mentioned problem, the supply unit of the 1st invention, it is the nonisulated type supply unit of input and output, comprising: forward converter, this forward converter possesses positive pole, neutral pole and negative pole, the interchange input of 3 phase 3 lines is carried out to rectification and convert direct current to; Above-mentioned direct current is converted to the reverse converter of the interchange of 3 phase 3 lines; And the capacitor's series circuit being connected respectively with positive pole, neutral pole and the negative pole of above-mentioned forward converter, this supply unit is characterised in that, comprising: 1 cross streams input by 3 in mutually and the bridging line that exchanges 1 phase of output and the neutral pole of direct current portion and be connected; 2 protection fuses that are connected with the interchange input of above-mentioned forward converter; 2 protection fuses that are connected with the interchange output of above-mentioned reverse converter; And 1 the protection fuse being connected between the neutral pole of above-mentioned forward converter and above-mentioned bridging line.
In addition; the supply unit of the 2nd invention; be in the 1st invention, with 2 protection fuses that the interchange input of above-mentioned forward converter is connected, be connected between the input filter and the AC input terminal of supply unit being connected with the interchange input of above-mentioned forward converter.
In addition; the supply unit of the 3rd invention; be in the 1st invention, with 2 protection fuses that the interchange output of above-mentioned reverse converter is connected, be connected between the output filter and ac output end of supply unit being connected with the interchange output of above-mentioned reverse converter.
Like this, in the present invention, the nonisulated type supply unit of input and output comprises: possess positive pole, neutral pole and negative pole, to 3 mutually the input that exchanges of 3 lines carry out the forward converter that rectification converts direct current to; Above-mentioned direct current is converted to the reverse converter of the interchange of 3 phase 3 lines; And the capacitor's series circuit being connected with positive pole, neutral pole, the negative pole of above-mentioned forward converter respectively, the nonisulated type supply unit of these input and output is characterised in that, comprising: 31 cross streams inputs in mutually and the bridging line that exchanges 1 phase of output and the neutral pole of direct current portion and be connected; 2 protection fuses that are connected with the interchange input of above-mentioned forward converter; 2 protection fuses that are connected with the interchange output of above-mentioned reverse converter; And 1 the protection fuse being connected between the neutral pole of above-mentioned forward converter and above-mentioned bridging line.Consequently, the use number of existing fuse can be reduced to 5 from 6, miniaturization, low price that can implement device, and improve operational reliability.
Accompanying drawing explanation
Fig. 1 means the circuit diagram of conventional example.
Fig. 2 means the circuit diagram of the present invention the 1st embodiment.
Fig. 3 means the circuit diagram of the present invention the 2nd embodiment.
Embodiment
Below, embodiments of the present invention are elaborated.
Main points of the present invention are, the nonisulated type supply unit of input and output comprises: possess positive pole, neutral pole and negative pole, to 3 mutually the input that exchanges of 3 lines carry out the forward converter that rectification converts direct current to; Above-mentioned direct current is converted to the reverse converter of the interchange of 3 phase 3 lines; And the capacitor's series circuit being connected respectively with positive pole, neutral pole, the negative pole of above-mentioned forward converter, the nonisulated type supply unit of these input and output is characterised in that, comprising: 31 cross streams inputs in mutually and the bridging line that exchanges 1 phase of output and the neutral pole of direct current portion and be connected; 2 protection fuses that are connected with the interchange input of above-mentioned forward converter; 2 protection fuses that are connected with the interchange output of above-mentioned reverse converter; And 1 the protection fuse being connected between the neutral pole of above-mentioned forward converter and above-mentioned bridging line.
[embodiment 1]
The 1st embodiment of the present invention has been shown in Fig. 2.Interchange input at the forward converter 3a consisting of with diode D1～D4 IGBTT1～T4 is connected with AC input filter 2a via fuse 9,10, the input of AC input filter 2a respectively with being respectively connected of 3 cross streams power supplys 1.In addition, the output of the reverse converter 6a consisting of with diode D5～D8 IGBTT5～T8 is connected with interchange output filter 7a via fuse 12,13, and the output that exchanges output filter 7a is connected with load 8 respectively.Between the DC terminal of forward converter 3a and reverse converter 6a, (between positive pole～negative pole) is connected with the series circuit of capacitor 4 and 5, and capacitor 4 is connected via fuse 15 with 1 of 5 the V phase that is connected in series point (neutral pole) and 3 cross streams power supplys 1 and load.
The following describes the protection action in such structure.As the IGBT of forward converter 3a or any in diode, there is one of protection action case in the situation of short trouble, in the situation that the protection action case that makes electric current IGBTT2 from the pattern of U phase flow direction V phase or W phase that short trouble occur describe.IGBTT2 conducting, according to the path of the W phase of U phase → filter 2a → fuse 9 → IGBTT2 → diode D4 → fuse 10 → filter 2a → AC power of AC power 1, or according to the path of the V phase of U phase → filter 2a → fuse 9 → IGBTT2 → capacitor 5 → fuse 15 → AC power of AC power 1, electric current increases, and energy is accumulated in the reactance coil of filter circuit 2a.Next, when IGBTT2 blocks, the energy of reactance coil charges to capacitor 4 and 5 by diode D1 or D4, and the electric current of reactance coil reduces becomes regular event.
Here, when IGBTT2 is short-circuited fault in galvanization, even if next will make its cut-off (disconnection) also cannot end.While then making IGBTT1 conducting under this state, by IGBTT1 and T2 by DC circuit short circuit, but because IGBTT1 is normal, so its protective circuit of blocking is moved after overcurrent now being detected.But, because short trouble has occurred IGBTT2, so according to the path of reactance coil → fuse 9 → IGBTT2 → diode 4 → fuse 10 of filter circuit 2a, or increase according to the electric current in the path of reactance coil → fuse 9 → IGBTT2 → capacitor 5 → fuse 15 of filter circuit 2a.Consequently, fuse 9 blocks overcurrent, protection semiconductor element, filter component parts etc.In the situation that other IGBT or diode are short-circuited fault, same pressure energy is enough to be protected by fuse.
Then, the protection to there is earth fault in forward converter 3a or reverse converter 6a in the situation that describes.For convenience of explanation, under the state of the neutral ground in AC power 1, the action in the situation of the negative pole generation earth fault of DC circuit describes.When there is earth fault; from the U of AC power 1, start mutually, according to the electric current in the path of filter circuit 2a → fuse 9 → IGBTT2 → earth point; by fuse 9, blocked; from the W of AC power 1, start mutually, according to the electric current in the path of filter 2a → fuse 10 → IGBTT4 → earth point, by fuse 10, blocked; electric current according to the path of V phase → fuse 15 → capacitor 5 → earth point of AC power is blocked by fuse 15; thus, protect the component parts such as semiconductor element, filter.
For reverse converter 6a, with forward converter similarly, the protection in the time of also can realizing the overcurrent protection of load and earth fault by fuse 12,13,15.
[embodiment 2]
Figure 3 illustrates the 2nd embodiment of the present invention.Different from the 1st embodiment, the fuse 9,10 between AC power 1 and forward converter 3a, and the insertion position of the fuse between reverse converter 6a and load 8 12,13.In embodiment 1, in AC power 1 side, fuse 9,10 is inserted between the interchange input and AC input filter 2a of forward converter 3a, but in the 2nd embodiment, is inserted between AC input filter 2a and AC power 1.In addition, at the interchange outlet side of embodiment 1, fuse 12,13 is inserted in reverse converter 6a and exchanges between output filter 7a, but in the 2nd embodiment, is inserted in and exchanges between output filter 7a and load 8.Protection action is identical with the 1st embodiment, so omit.
In addition, show in the above-described embodiments the example in the situation of neutral ground of AC power, but can protect too the in the situation that of 1 phase ground connection.In addition, even if mix in the situation that has the 1st embodiment and the 2nd embodiment, also can realize same protection.
Claims (3)
1. a supply unit, it is the nonisulated type supply unit of input and output, comprising: forward converter, this forward converter possesses positive pole, neutral pole and negative pole, to 3 mutually the interchange input of 3 lines carry out rectification and convert direct current to; Described direct current is converted to the reverse converter of the interchange of 3 phase 3 lines; And direct current portion, this direct current portion is positioned between described forward converter and described reverse converter, and the capacitor's series circuit being connected respectively by the positive pole with described direct current, neutral pole and negative pole forms, and this supply unit is characterised in that, comprising:
1 cross streams input by 3 in mutually and the bridging line that exchanges 1 phase of output and the neutral pole of described direct current portion and be connected;
2 protection fuses that are connected with the interchange input of described forward converter;
2 protection fuses that are connected with the interchange output of described reverse converter; With
1 the protection fuse being connected between the neutral pole of described direct current portion and described bridging line.
2. supply unit according to claim 1, is characterized in that:
With 2 protection fuses that the interchange input of described forward converter is connected, be connected between the input filter and the AC input terminal of supply unit being connected with the interchange input of described forward converter.
3. supply unit according to claim 1, is characterized in that:
With 2 protection fuses that the interchange output of described reverse converter is connected, be connected between the output filter and ac output end of supply unit being connected with the interchange output of described reverse converter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-156542 | 2010-07-09 | ||
| JP2010156542A JP5659584B2 (en) | 2010-07-09 | 2010-07-09 | Power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102315780A CN102315780A (en) | 2012-01-11 |
| CN102315780B true CN102315780B (en) | 2014-04-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110205203.0A Active CN102315780B (en) | 2010-07-09 | 2011-06-24 | Power source device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5659584B2 (en) |
| CN (1) | CN102315780B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102176100B1 (en) * | 2017-05-23 | 2020-11-09 | 엘에스일렉트릭(주) | Power converting apparatus |
| KR102419754B1 (en) * | 2017-10-25 | 2022-07-11 | 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 | power converter |
| WO2021049016A1 (en) * | 2019-09-13 | 2021-03-18 | 三菱電機株式会社 | Power conversion device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5923549A (en) * | 1996-07-12 | 1999-07-13 | Kabushiki Kaisha Toshiba | X-ray high voltage generator protected against fault by backup system |
| JP2004015939A (en) * | 2002-06-10 | 2004-01-15 | Meidensha Corp | Charging device for capacitor |
| CN1960157A (en) * | 2006-11-10 | 2007-05-09 | 南京航空航天大学 | Motor driver of biconvex poles |
| CN201442524U (en) * | 2009-05-31 | 2010-04-28 | 青岛易特优电子有限公司 | Inversion charging type vehicle-mounted auxiliary power supply |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07213072A (en) * | 1994-01-14 | 1995-08-11 | Toshiba Fa Syst Eng Kk | Grounding protective device for single-phase three-wire inverter |
| JP3245504B2 (en) * | 1994-09-27 | 2002-01-15 | シャープ株式会社 | Inverter device |
| JP2006340466A (en) * | 2005-06-01 | 2006-12-14 | Fuji Electric Fa Components & Systems Co Ltd | Pwm converter controller |
| JP4783174B2 (en) * | 2006-02-16 | 2011-09-28 | 三菱電機株式会社 | Power converter |
| JP5223320B2 (en) * | 2007-12-12 | 2013-06-26 | パナソニック株式会社 | Shared printed circuit board and DC power supply circuit using the same |
-
2010
- 2010-07-09 JP JP2010156542A patent/JP5659584B2/en active Active
-
2011
- 2011-06-24 CN CN201110205203.0A patent/CN102315780B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5923549A (en) * | 1996-07-12 | 1999-07-13 | Kabushiki Kaisha Toshiba | X-ray high voltage generator protected against fault by backup system |
| JP2004015939A (en) * | 2002-06-10 | 2004-01-15 | Meidensha Corp | Charging device for capacitor |
| CN1960157A (en) * | 2006-11-10 | 2007-05-09 | 南京航空航天大学 | Motor driver of biconvex poles |
| CN201442524U (en) * | 2009-05-31 | 2010-04-28 | 青岛易特优电子有限公司 | Inversion charging type vehicle-mounted auxiliary power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5659584B2 (en) | 2015-01-28 |
| JP2012019647A (en) | 2012-01-26 |
| CN102315780A (en) | 2012-01-11 |
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