CN103916033A - Single-phase inverter circuit - Google Patents
Single-phase inverter circuit Download PDFInfo
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- CN103916033A CN103916033A CN201310004412.8A CN201310004412A CN103916033A CN 103916033 A CN103916033 A CN 103916033A CN 201310004412 A CN201310004412 A CN 201310004412A CN 103916033 A CN103916033 A CN 103916033A
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- busbar
- phase inversion
- inversion circuit
- bus bar
- connecting portion
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Abstract
The invention provides a single-phase inverter circuit which comprises a set of power devices, an energy storage device, a discharging resistor and a composite busbar. The composite busbar comprises busbar bodies, terminals and connecting portions, the busbar bodies are flat, at least two busbar bodies are overlapped, and the space between adjacent busbar bodies is filled with high-insulating-strength material, so that the adjacent busbar bodies are insulated. The terminals are arranged on the busbar bodies and used for being connected with a circuit device, and the connecting portions are arranged on the busbar bodies and used for being connected with a direct-current input end, a direct-current output end or the circuit device. The composite busbar at least comprises a first busbar body, a second busbar body and a third busbar body, the first busbar body is connected with the positive pole of the direct-current input end, the second busbar body is connected with the negative pole of the direct-current input end, and the third busbar body is connected with an alternating-current output end. The single-phase inverter circuit can lower stray inductance and reduce peak voltages.
Description
Technical field
The present invention relates to electrical technology, relate in particular to a kind of single-phase inversion circuit.
Background technology
The operational system of electric locomotive mainly contains trailer system and auxiliary system, and wherein drawing AuCT is to guarantee that electric locomotive realizes the important devices of electric traction, braking and additional feed, has determined the stability of electric locomotive high-speed cruising.
At present, critical component in traction AuCT in single-phase inversion circuit, as the electrical connection of the parts such as insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT), Support Capacitor and Absorption Capacitance adopts cable or copper bar to connect conventionally.Under traction AuCT operating state, because IGBT self exists inductance, and on the DC bus being connected between IGBT and DC energy storage electric capacity, also there is stray inductance, therefore, adopt cable or copper bar to be electrically connected and can cause the larger stray inductance of existence in single-phase inversion circuit.IGBT is in the process of switch, and single-phase inversion circuit will produce higher due to voltage spikes, causes in circuit device overheated, easily damages IGBT, and makes the reliability variation of single-phase inversion circuit.
Summary of the invention
The invention provides a kind of single-phase inversion circuit, in order to solve the larger problem of single-phase inversion circuit stray inductance in prior art, realize the stray inductance that reduces circuit, reduce the generation of peak voltage.
The embodiment of the present invention provides a kind of single-phase inversion circuit, comprises one group of power device, energy storage device, discharge resistance and composite bus bar;
Described composite bus bar comprises busbar, terminal and connecting portion;
Described busbar, is shaped as flat, and at least two described busbars are stacked together, and between adjacent described busbar, fills high insulation resistance material, keeping insulation between adjacent described busbar;
Described terminal, is arranged on described busbar, for connecting circuit device;
Described connecting portion, is arranged on described busbar, for connecting direct-flow input end, ac output end or described circuit devcie;
Described composite bus bar at least comprises three described busbars, i.e. the first busbar, the second busbar and the 3rd busbar;
Described the first busbar is connected by the first connecting portion and described direct-flow input end are anodal; Described the second busbar is connected with described direct-flow input end negative pole by the second connecting portion; Described the 3rd busbar is connected with described ac output end by the 3rd connecting portion.
The technical scheme of the embodiment of the present invention is by being arranged to flat by the shape of busbar, and at least two busbars are stacked together, between adjacent described busbar, fill high insulation resistance material, and be connected voltage input end and circuit devcie with connecting portion by the terminal being arranged on busbar, and the peak voltage producing in turn off process by the ripple in energy storage device filtering DC input voitage and absorption IGBT, solve the larger problem of single-phase inversion circuit stray inductance, realize the stray inductance that reduces circuit, reduce the generation of peak voltage, improve the reliability of single-phase inversion circuit, circuit layout is simple, flexibility is improved, reduce the volume of single-phase inversion circuit, be convenient to the maintenance of circuit devcie.
Accompanying drawing explanation
The structural representation of the single-phase inversion circuit that Fig. 1 provides for the embodiment of the present invention;
The stereogram of composite bus bar in the single-phase inversion circuit that Fig. 2 provides for the embodiment of the present invention;
The front view of composite bus bar in the single-phase inversion circuit that Fig. 3 provides for the embodiment of the present invention;
The left view of composite bus bar in the single-phase inversion circuit that Fig. 4 provides for the embodiment of the present invention;
The vertical view of composite bus bar in the single-phase inversion circuit that Fig. 5 provides for the embodiment of the present invention.
Embodiment
The structural representation of the single-phase inversion circuit that Fig. 1 provides for the embodiment of the present invention, the stereogram of composite bus bar in the single-phase inversion circuit that Fig. 2 provides for the embodiment of the present invention, the front view of composite bus bar in the single-phase inversion circuit that Fig. 3 provides for the embodiment of the present invention, the left view of composite bus bar in the single-phase inversion circuit that Fig. 4 provides for the embodiment of the present invention, the vertical view of composite bus bar in the single-phase inversion circuit that Fig. 5 provides for the embodiment of the present invention.As shown in Figures 1 to 5, the concrete structure of this single-phase inversion circuit is as follows: comprise one group of power device, energy storage device, discharge resistance and composite bus bar.
Described composite bus bar comprises busbar, terminal and connecting portion.Described busbar, is shaped as flat, and at least two described busbars are stacked together, and between adjacent described busbar, fills high insulation resistance material, keeping insulation between adjacent described busbar.Described terminal, is arranged on described busbar, for connecting circuit device.Described connecting portion, is arranged on described busbar, for connecting direct-flow input end, ac output end or described circuit devcie.Described composite bus bar at least comprises three described busbars, i.e. the first busbar 11, the second busbar 12 and the 3rd busbar 13.Described the first busbar 11 is connected by the first connecting portion 31 and described direct-flow input end are anodal; Described the second busbar 12 is connected with described direct-flow input end negative pole by the second connecting portion 32; Described the 3rd busbar 13 is connected with described ac output end by the 3rd connecting portion 33.
Wherein, the first busbar 11, the second busbar 12 and the 3rd busbar 13 in composite bus bar are all arranged to flat, and the width in each busbar cross section is increased, and the thickness in cross section reduces, and the magnetic flux producing can reduce electric current and flow through time reduces the stray inductance of each busbar.Each busbar width and thickness can be set according to the size of current passed through in application circuit, and under the prerequisite guaranteeing by maximum current, the width of increasing section, reduces the thickness in cross section, to reduce the stray inductance of each busbar.Each busbar in composite bus bar is stacked together, and is followed successively by from bottom to up the first busbar 11, the second busbar 12 and the 3rd busbar 13, makes the Distance Shortened between each busbar, also can reduce the stray inductance of composite bus bar.Between two adjacent busbars, fill high insulation resistance material, selecting of high insulation resistance material can be set according to the potential difference between adjacent two busbars, keeping insulation between two adjacent busbars.The current potential of each busbar can be set according to the voltage of direct-flow input end in the single-phase inversion circuit of composite bus bar application, for example: the current potential of the first busbar 11 is+U
0, the current potential of the second busbar 12 is 0V, the current potential of the 3rd busbar 13 is+U
0/ 2.
The operation principle of this composite bus bar is: each busbar is by corresponding connecting portion access direct-flow input end, make busbar there is the current potential equating with DC input voitage, each terminal in composite bus bar connects with corresponding busbar, therefore also there is the voltage equating with direct-flow input end, according to circuit theory, circuit devcie is connected to each terminal on busbar, to obtain the required operating voltage of circuit devcie.
One group of power device that the present embodiment provides comprises two IGBT composition single-phase inversion bridge circuits 41, by the high-frequency switch motion of two IGBT, direct current is converted to alternating current.Bridge circuit two ends connect respectively the first busbar 11 and the second busbar 12, bridge circuit indirect ac output end, with output AC voltage, be specifically as follows: the first link 411 of bridge circuit 41 connects the first terminal 21 in the first busbar 11, so that the upper bridge joint of bridge circuit 41 enters direct current positive pole, the second link 412 of bridge circuit 41 connects the second terminal 22 in the second busbar 12, so that the lower bridge joint of bridge circuit 41 enters direct current negative pole, the middle link 413 of bridge circuit 41 connects and exchanges output outside terminal 51, with output single-phase alternating current.The drive circuit of IGBT is connected to the grid of each IGBT, realizes switch motion to control IGBT, and this drive circuit is connected to the 4th connecting portion 34 of the first busbar 11, for detection of the voltage between the upper bridge IGBT collector and emitter in single-phase inversion circuit.
Energy storage device comprises Absorption Capacitance and Support Capacitor, wherein Absorption Capacitance can be the first electric capacity 61, the positive pole of the first electric capacity 61 is connected to the 5th connecting portion 35 of the first busbar 11, negative pole is connected to the 6th connecting portion 36 of the second busbar 12, be connected in parallel with the bridge circuit 41 of IGBT, to suppress IGBT shutoff voltage spike in the process of IGBT switch.Support Capacitor comprises the second electric capacity 62 and the 3rd electric capacity 63, the positive pole of the second electric capacity 62 is connected to the 3rd terminal 23 of the first busbar 11, negative pole is connected to the 4th terminal 24 of the 3rd busbar 13, the positive pole of the 3rd electric capacity 63 is connected to the Five-terminals 25 of the 3rd busbar 13, negative pole is connected to the 6th terminal 26 of the second busbar 12, so that the second electric capacity 62 and the 3rd electric capacity 63 is connected in series, and is connected in parallel with bridge circuit 41, with the ripple in filtering DC input voitage, make direct voltage keep stable.
Discharge resistance can comprise two resistance composition bridge circuits, specifically can comprise the first resistance 71 and the second resistance 72, the first resistance 71 and the second resistance 72 are connected in series, its one end is connected to the 7th connecting portion 37 of the first busbar 11, the other end is connected to the 8th connecting portion 38 of the second busbar 12, link in the middle of two resistance is connected to the 9th connecting portion 39 of the 3rd busbar 13, be used for when after single-phase inversion down circuitry, the residual charge in circuit devcie discharges by the first resistance 71 and the second resistance 72.
The technical scheme that the present embodiment provides is by being arranged to flat by the shape of busbar, and at least two busbars are stacked together, between adjacent described busbar, fill high insulation resistance material, and be connected voltage input end and circuit devcie with connecting portion by the terminal being arranged on busbar, and the peak voltage producing in turn off process by the ripple in energy storage device filtering DC input voitage and absorption IGBT, solve the larger problem of single-phase inversion circuit stray inductance, realize the stray inductance that reduces circuit, reduce the generation of peak voltage, improve the reliability of single-phase inversion circuit, circuit layout is simple, flexibility is improved, reduce the volume of single-phase inversion circuit, be convenient to the maintenance of circuit devcie.
On the basis of technique scheme, terminal preferably can be connected with a described busbar by the mode of welding or cold pressing, and be exposed to outside described composite bus bar, or terminal is connected with a described busbar by the mode of welding or cold pressing, and through adjacent described busbar, be exposed to described composite bus bar outside, and with described adjacent described master row insulating, for example: the 4th terminal 24 is connected with the 3rd busbar 13, be exposed to the outside of composite bus bar, to connect the negative pole of the second electric capacity 62, the 6th terminal 26 is connected with the second busbar, through the 3rd busbar 13 above, be exposed to the outside of composite bus bar, to connect the negative pole of the 3rd electric capacity 63, and the 3rd terminal 23 be connected with the first busbar, through the second busbar 12 and the 3rd busbar 13 above, to connect the positive pole of the second electric capacity 62.On busbar, be provided with via hole, pass adjacent busbar for terminal by this via hole.Via hole inwall applies dielectric film, and insulating material can adopt a kind of organic mylar, and terminal passes from via hole, keeps insulation with adjacent busbar.The selection of number of terminals and layout can be set according to the principle of application circuit, and the present embodiment is not construed as limiting this.
Preferably, in the present embodiment, each busbar can be copper bar, has advantages of that resistivity is low, thermal stability is high.The surface of busbar can adopt electrolytic tinning, to improve Weldability and corrosion-resistant degree.Busbar surface, except the junction and described connecting portion of terminal, all applies insulating material.According to required creepage distance and the environmental condition of circuit of composite bus bar application, adopt pressing mold mode to process for the busbar being stacked together and high-strength insulating material, shape is in aggregates, the end face of composite bus bar can adopt fluid sealant by composite bus bar encapsulation process, prevents busbar end face generation starting the arc phenomenon.
The high-pressure section in single-phase inversion circuit has been realized electrical connection by composite bus bar in technique scheme, wherein each busbar adopts the thick copper bar of 0.8mm, copper bar surface electrolytic tinning, tin coating is 100% metallic tin, its thickness is more than or equal to 15 μ m, between two-layer adjacent busbar, fill high insulation resistance material, thickness is (0.5 ~ 0.8) mm.Busbar surface all covers with dielectric film except terminal junction and connecting portion, and thickness is (0.15 ~ 0.25) mm.The stray inductance that adopts technique scheme that the composite bus bar in single-phase inversion circuit is produced can be less than 50nH, can bear the voltage that exchanges 2500V.
For the single-phase inversion circuit providing in above-described embodiment, those skilled in the art also can be according to the corresponding single-phase inversion circuit of scene different designs of application, the composite bus bar wherein adopting also can be set according to circuit devcie used in single-phase inversion circuit, comprise shape, the size of setting busbar, stack form, quantity, arrangement form and the terminal lead-out mode of setting terminal, the present embodiment is all not construed as limiting this.
Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (7)
1. a single-phase inversion circuit, is characterized in that, comprises one group of power device, energy storage device, discharge resistance and composite bus bar;
Described composite bus bar comprises busbar, terminal and connecting portion;
Described busbar, is shaped as flat, and at least two described busbars are stacked together, and between adjacent described busbar, fills high insulation resistance material, keeping insulation between adjacent described busbar;
Described terminal, is arranged on described busbar, for connecting circuit device;
Described connecting portion, is arranged on described busbar, for connecting direct-flow input end, ac output end or described circuit devcie;
Described composite bus bar at least comprises three described busbars, i.e. the first busbar, the second busbar and the 3rd busbar;
Described the first busbar is connected by the first connecting portion and described direct-flow input end are anodal; Described the second busbar is connected with described direct-flow input end negative pole by the second connecting portion; Described the 3rd busbar is connected with described ac output end by the 3rd connecting portion.
2. single-phase inversion circuit according to claim 1, is characterized in that, described terminal is connected with described the first busbar by the mode of welding or cold pressing, and is exposed to described composite bus bar outside; Or
Described terminal is connected with described the first busbar by the mode of welding or cold pressing, and through described the second busbar and/or the 3rd busbar, is exposed to described composite bus bar outside, and with described the second busbar and the 3rd master row insulating.
3. single-phase inversion circuit according to claim 2, is characterized in that, described the second busbar and/or the 3rd busbar are provided with via hole, and described via hole inwall applies dielectric film, and described terminal passes from described via hole, keeps insulation with described adjacent described busbar.
4. single-phase inversion circuit according to claim 1, is characterized in that, described busbar is copper bar.
5. single-phase inversion circuit according to claim 4, is characterized in that, described busbar electroplating surfaces with tin.
6. single-phase inversion circuit according to claim 1, is characterized in that, described busbar surface, except terminal junction and described connecting portion, all applies insulating material.
7. according to the arbitrary described single-phase inversion circuit of claim 1-6, it is characterized in that, each described busbar and high-strength insulating material adopt pressing mold mode to process, and shape is in aggregates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310004412.8A CN103916033A (en) | 2013-01-07 | 2013-01-07 | Single-phase inverter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310004412.8A CN103916033A (en) | 2013-01-07 | 2013-01-07 | Single-phase inverter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103916033A true CN103916033A (en) | 2014-07-09 |
Family
ID=51041486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310004412.8A Pending CN103916033A (en) | 2013-01-07 | 2013-01-07 | Single-phase inverter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103916033A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505876A (en) * | 2016-12-21 | 2017-03-15 | 武汉东城新能源有限公司 | A kind of power cell of H-bridge inverter circuit |
| CN107370395A (en) * | 2017-08-15 | 2017-11-21 | 中车永济电机有限公司 | The traction power module composite bus bar of compatible rectification and inversion function |
| CN108832868A (en) * | 2018-08-29 | 2018-11-16 | 北斗航天汽车（北京）有限公司 | Electric machine controller integrates busbar and busbar assembly method |
| CN111262453A (en) * | 2018-11-30 | 2020-06-09 | 无锡研奥电子科技有限公司 | Composite power device |
| CN114217217A (en) * | 2021-12-15 | 2022-03-22 | 极氪汽车(宁波杭州湾新区)有限公司 | Switching dynamic characteristic test circuit and system of inverter |
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| CN101826837A (en) * | 2010-06-12 | 2010-09-08 | 四川吉风电源科技有限公司 | Variable frequency control power module of wind power generator |
| CN201869082U (en) * | 2010-10-14 | 2011-06-15 | 国网电力科学研究院 | Power module system for air cooling current transformer |
| CN102638157A (en) * | 2012-05-02 | 2012-08-15 | 株洲南车时代电气股份有限公司 | Unit H-bridge module bypass circuit of chain type static synchronous compensator (STATCOM) |
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2013
- 2013-01-07 CN CN201310004412.8A patent/CN103916033A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826837A (en) * | 2010-06-12 | 2010-09-08 | 四川吉风电源科技有限公司 | Variable frequency control power module of wind power generator |
| CN201869082U (en) * | 2010-10-14 | 2011-06-15 | 国网电力科学研究院 | Power module system for air cooling current transformer |
| CN102638157A (en) * | 2012-05-02 | 2012-08-15 | 株洲南车时代电气股份有限公司 | Unit H-bridge module bypass circuit of chain type static synchronous compensator (STATCOM) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505876A (en) * | 2016-12-21 | 2017-03-15 | 武汉东城新能源有限公司 | A kind of power cell of H-bridge inverter circuit |
| CN107370395A (en) * | 2017-08-15 | 2017-11-21 | 中车永济电机有限公司 | The traction power module composite bus bar of compatible rectification and inversion function |
| CN108832868A (en) * | 2018-08-29 | 2018-11-16 | 北斗航天汽车（北京）有限公司 | Electric machine controller integrates busbar and busbar assembly method |
| CN111262453A (en) * | 2018-11-30 | 2020-06-09 | 无锡研奥电子科技有限公司 | Composite power device |
| CN114217217A (en) * | 2021-12-15 | 2022-03-22 | 极氪汽车(宁波杭州湾新区)有限公司 | Switching dynamic characteristic test circuit and system of inverter |
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Application publication date: 20140709 |
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