CN109889058A - A kind of new energy vehicle inverter stream busbar - Google Patents
A kind of new energy vehicle inverter stream busbar Download PDFInfo
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- CN109889058A CN109889058A CN201910149606.4A CN201910149606A CN109889058A CN 109889058 A CN109889058 A CN 109889058A CN 201910149606 A CN201910149606 A CN 201910149606A CN 109889058 A CN109889058 A CN 109889058A
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Abstract
The invention discloses a kind of new energy vehicle inverters with busbar is flowed, using symmetrically arranged DC master row and alternating current bus bar；Direct-flow positive pole busbar connects the direct-flow positive pole input terminal of inverter and the positive terminal of each power module, and direct current cathode bus bar connects the direct current negative input of inverter and the negative terminal of each power module, direct-flow positive pole busbar and direct current cathode bus bar arranged stacked；Alternating current bus bar includes U phase busbar, V phase busbar, W phase busbar, U phase busbar connects the U phase input terminal of each power module U phase output terminals and load in inverter, V phase busbar connects the V phase input terminal of each power module V phase output terminals and load in inverter, and W phase busbar connects the W phase input terminal of each power module W phase output terminals and load in inverter.The present invention flows influential effect from electric current between each working cell in three phase full bridge power module inside that system level comprehensively considers DC side and exchanges between the influence of side busbar, each parallel module and integrates.
Description
Technical field
The present invention relates to a kind of busbar structure, especially a kind of new energy vehicle inverter stream busbar.
Background technique
With the development of power electronics technology and large-scale application, demand of the market to great-power electronic device are continuously increased
And it is higher and higher to the power requirement of IGBT, due to by semiconductor power device self performance, manufacturing process and cost
Limitation, the output parameter of single IGBT module tend not to meet the requirements, and generally use multiple IGBT module parallel combinations and constitute
The more method of high current density power module improves the power grade of power electronic equipment, this scheme not only can provide required
Output parameter, and there are uniform heat distribution, flexible layout and the advantages such as sexual valence is higher, it is the mainstream scheme of current application.But
The program also suffers from certain drawbacks, and there are electric currents to distribute uneven phenomenon for more IGBT module parallels, and each road unevenness galvanic electricity stream can be led
Cause each modular load variant, some module loads kick the beam, some module overloads, to reduce the reliability of IGBT module
And the stability of system, IGBT module shelf-life is substantially reduced, module and device is caused to damage when serious.More IGBT modules are simultaneously
The main reason for connection unevenness stream, is as follows, and 1. each IGBT module inherent parameters are inconsistent；2. each IGBT module receives driving signal not
It is synchronous；3. and the alternating current and direct current copper bar impedance parameter that IGBT module is directly linked is inconsistent.Wherein, each IGBT module itself is joined
Number inconsistence problems, can not fundamentally solve, can only guarantee to approach as far as possible, and concrete measure is the preferred same same batch of model
Product, then detection screening is carried out to module, select the product of parameter differences within the allowable range.It is received for each IGBT module
The nonsynchronous problem of driving signal, the preferably strong driver of selection driving capability, drive each parallel connection with same driving signal simultaneously
Module, and guarantee that driving signal transmission path is close to each module distance as far as possible.This two kinds of factors are difficult to the base in the above measure
It is further improved on plinth by other measures and flows effect, therefore this patent emphasis surrounds what improvement was directly linked with IGBT module
Alternating current and direct current copper bar impedance parameter flows to realize.
Patent CN 104242605A (denomination of invention: the stream busbar) disclosure of the invention is a kind of to flow busbar, becomes for one
Flow device, comprising: DC master row is connected to the DC terminal of current transformer and the positive terminal of each power modules in the current transformer and bears
Extreme son；Alternating current bus bar is connected to ac terminal and the load of each power modules in the current transformer；Wherein, work as current transformer
When work, which produces between the DC terminal and the positive terminal or negative terminal of a power modules of the current transformer
The sum of the inductance that raw inductance and the alternating current bus bar generate between the load and the ac terminal of the power modules is equivalent to this
The inductance that DC master row generates between the DC terminal and the positive terminal or negative terminal of other power modules of the current transformer
And the sum of the inductance that the alternating current bus bar generates between the load and the ac terminal of other power modules.The program only considers electricity
The factor of sense does not account for influencing caused by resistance, more unilateral.In addition the program is suitable between half-bridge module and half-bridge module
Electric current flow busbar design, it is difficult to apply in more typical used in new energy vehicles three phase full bridge intermodule parallel current-sharing.
Patent CN 203135694U (a kind of denomination of invention: the IGBT module parallel output current equalizing structure) invention provides one
Kind IGBT module parallel exports current equalizing structure, and the structure includes 4 parallel branches, the parallel branch ruler having the same
It is very little, it is separately connected each parallel IGBT module；Using realizing that stream exports after parallel connection after 4 parallel branches are in parallel two-by-two.This reality
It is that entire parallel output current equalizing structure is process by one piece of copper sheet with novel beneficial effect, it is compact-sized, it is sharp to greatest extent
With the area of copper sheet, the material loss in process of manufacture is effectively reduced；Parallel branch can also penetrate electric current simultaneously
Sensor or magnet ring are convenient for measuring adjustment and flow effect, have test and production application value.The program is suitable for inverter
The more loose most bridge modules of assembly space requirement each working cell of three phase full bridge power module in parallel or individually integrated
Between electric current flow, but the structure is not suitable for the more compact situation in inverter space, in addition, the structure can be only applied to direct current
Side does not consider to exchange side situation.
Patent CN 107733246A (denomination of invention: uniform flow type parallel IGBT module component) present invention provides one kind and flows
Formula parallel IGBT module component comprising: radiator, with front and back；Multiple IGBT modules make with adaptation board pairing
It is fixedly mounted on the front of radiator with simultaneously word order；Copper bar in parallel is placed on the multiple IGBT module, and
It is fixedly connected with the end that exchanges of one or more IGBT modules in an intermediate position in multiple IGBT modules；Exchange output copper
Row is overlapped on the top of copper bar in parallel, and the both ends of exchange output copper bar is fixedly connected with the both ends of copper bar in parallel, simultaneously
The ac output end that the module in outside is in multiple IGBT modules is shorted respectively with the both ends for exchanging output copper bar, wherein handing over
The middle part of stream output copper bar is not contacted in the middle part of copper bar in parallel, and has gap, so that the electric current flowed through on copper bar in parallel
It is overlapped, but flows to opposite in the horizontal direction with the electric current flowed through on exchange output copper bar.The invention is mainly used in ipsilateral cloth
The more power module parallel electric currents set flow, and are not applied for heteropleural deployment scenarios, and can not be applied to individually integrated three-phase
Electric current between each working cell of full bridge power inside modules flows, and cannot measure to each parallel branch electric current, it is difficult to judge
Flow effect.
Patent CN 203014662U (a kind of parallel current-equalizing circuit and inverter) invention provides a kind of parallel current-sharing electricity
Road comprising the power cell of multiple parallel connections exports copper bar, the power cell and friendship with multiple exchange being attached thereto respectively
The quantity of stream output copper bar is equal, forms exchange output all the way after the multiple exchange output copper bar is in parallel, wherein the parallel connection
Flow equalizing circuit further includes multiple magnet units, and each magnet unit is installed on an exchange output copper bar, to increase the peace
The impedance value of exchange output copper bar equipped with magnet unit, and the impedance value of each exchange output copper bar is equal.The hair
It is bright more difficult using the practical realization of the method for increasing auxiliary element (restrictor ring), and peace is designed when more IGBT module parallels
Fill it is complex, flow through single IGBT module electric current it is larger when, the volume of restrictor ring can also increase with it, and significantly increase
System cost and processing and manufacturing difficulty.
The prior art surrounds stream design between independent half-bridge module more, lacks the intermodule parallel connection of three phase full bridge integrated form and sets
Solution is counted, whole stream effect is seldom integrally considered from system level, it is difficult to each parallel branch electric current is measured, it is difficult
Judging to flow effect, can not being to reliably applied to test and producing.
Summary of the invention
In order to overcome in the prior art multiple module paralleling electric current current sharing it is bad, design is complicated, and branch current is not easy to detect,
And higher cost, lack three phase full bridge integrated power wired in parallel the problems such as flow design scheme, the present invention provide one kind from
System level integrally consider it is whole flow effect, and simple and compact for structure, stray inductance is smaller, and stream effect is preferable, cost compared with
Busbar current equalizing structure that the is low and multiple module paralleling that each parallel branch electric current measures being exported.
The present invention provides a kind of new energy vehicle inverter stream busbar, using symmetrically arranged DC master row assembly and friendship
Flow busbar assembly；DC master row assembly includes direct-flow positive pole busbar and direct current cathode bus bar, and direct-flow positive pole busbar connects inverter
Direct-flow positive pole input terminal and each power module positive terminal, direct current cathode bus bar connect inverter direct current negative input
With the negative terminal of each power module, direct-flow positive pole busbar and direct current cathode bus bar arranged stacked；Alternating current bus bar includes that U phase is female
Row, V phase busbar, W phase busbar, U phase busbar connect the U phase input terminal of each power module U phase output terminals and load in inverter
Son, V phase busbar connect the V phase input terminal of each power module V phase output terminals and load in inverter, and the connection of W phase busbar is inverse
Become the W phase input terminal of each power module W phase output terminals and load in device.The integrated form busbar comprehensively considers from system level
Between DC side and the influence of exchange side busbar, each parallel module and integrated each working cell in three phase full bridge power module inside
Between electric current flow influential effect.Each parallel branch electric current can be measured simultaneously, comparative test and simulation analysis are as a result, part
Busbar impedance parameter is adjusted, further improves and flows effect, actual production can be to reliably applied to.
The direct-flow positive pole busbar includes positive input terminal, positive busbar bus and multiple positive output terminals, direct current
Electricity is shunted by positive busbar bus, is transferred to corresponding positive output terminals by respective connection structure respectively；It is described straight
Flowing cathode bus bar includes that negative input terminal, cathode bus bar bus and multiple negative output terminals, direct current pass through cathode bus bar
Bus shunts, and is transferred to corresponding negative output terminals by respective connection structure respectively；Each positive output terminals and anode
Each negative output terminals of connection structure and corresponding position between busbar bus are corresponding with the connection structure between cathode bus bar bus
Position uses stepped construction；Positive busbar bus and cathode bus bar bus are stepped construction.
The power module can be integrated three phase full bridge power module and be also possible to three-phase half-bridge module.
The power module modes of emplacement is back-positioned type modes of emplacement.
The DC master row can be the conductive metal row of absolute construction, be also possible to be built in bus capacitor and bus electricity
Hold integrated conductive metal row.
The positive busbar and cathode bus bar of the DC master row are except the terminal with power module positive and negative electrode terminal contacting portions
Outside, rest part carries out arranged stacked, utmostly reduces the stray inductance of DC master row.
The monosymmetric stretching connecting terminal of direct-flow positive pole busbar is used for and each parallel power module positive terminal of the same name
Son connection.
The monosymmetric connecting terminal quantity of stretching out of the direct-flow positive pole busbar is by the quantity and type of parallel power module
It determines.
The monosymmetric stretching connecting terminal of direct current cathode bus bar is used for and each parallel power module negative pole end of the same name
Son connection.
The monosymmetric connecting terminal quantity of stretching out of the direct current cathode bus bar is by the quantity and type of parallel power module
It determines.
Completely cut off between the DC master row positive and negative anodes busbar by dielectric.
Each phase busbar of the alternating current bus bar can be arranged for the conductive metal of single structure, or multiple independent gold
Belong to the composite structure of the assembled one of row's structure.
Each phase busbar of the alternating current bus bar should have a connection terminal of multiple positional symmetries, the quantity of the connection terminal by
The quantity of parallel power module determines.
Each phase busbar of the alternating current bus bar, which should have a distance that can penetrate current sensor or other, can survey electric current dress
It sets.
Each phase busbar structure of alternating current bus bar is same or similar.
The working principle of the invention is, when inverter work, to illustrate by taking a certain working cell of parallel module as an example, directly
Busbar is flowed to hand in a certain working cell positive terminal and negative terminal of inverter DC terminal and the module and the working cell
Between corresponding with the load ac terminal of stream terminal the sum of impedance be equivalent to the working cell positive and negative electrode terminals of other modules with it is inverse
The sum of impedance between the DC master row and working cell ac terminal ac terminal corresponding with load of change device DC terminal connection.
The positive effect of the present invention is to provide a kind of simple and compact for structure, and stray inductance is smaller, can be to each parallel branch electricity
Stream measures, and is to reliably applied to test and produce, and carries out between each parallel module from system level and integrated three-phase is complete
A kind of stream preferable busbar structure scheme of effect that electric current flows is considered inside bridge power module between each working cell.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the equivalent circuit schematic that the present invention flows busbar scheme；
Fig. 2 is inverter current of embodiment of the present invention system construction drawing schematic diagram；
Fig. 3 is inverter current of embodiment of the present invention system explosion diagram；
Fig. 4 is DC master row assembly structure schematic diagram；
Fig. 5 is direct-flow positive pole busbar structure schematic diagram；
Fig. 6 is direct current cathode bus bar structural schematic diagram；
Fig. 7 is a kind of single carrier alternating current bus bar structural schematic diagram；
Fig. 8 is another combination alternating current bus bar structural schematic diagram；
Fig. 9 is a certain section of alternating current bus bar structural schematic diagram in combination alternating current bus bar.
In figure:
1 is power module circuit one, and 2 be power module circuit two, and Z1-Z6 is each section of circuit equivalent impedance value, and C is direct current
Bus capacitor, 100 be inverter current system structure, and 101 be current sensor, and 102 be the first integrated form three phase full bridge power
Module, 103 be the second integrated form three phase full bridge power module, and 110 be DC master row assembly, and 120 be positive busbar, 121-A A
Side positive output terminals one, 122-A are the side A positive output terminals two, and 123-A is the side A positive output terminals three, and 121-B is the side B
Positive output terminals one, 122-B be the side B positive output terminals two, 123-B be the side B positive output terminals three, 124-A be the side A just
Connection structure between pole output terminal one and positive busbar bus, 125-A are between the side A positive output terminals two and positive busbar bus
Connection structure, 126-A are connection structure between the side A positive output terminals three and positive busbar bus, and 124-B is the output of the side B anode
Connection structure between terminal one and positive busbar bus, 125-B are to connect to tie between the side B positive output terminals two and positive busbar bus
Structure, 126-B are connection structure between the side B positive output terminals three and positive busbar bus, and 127 be positive input terminal, and 128 are positive
Pole busbar bus, 130 be cathode bus bar, and 131-A is the side A cathode bus bar output terminal one, and 132-A is the output of the side A cathode bus bar
Terminal two, 133-A are the side A cathode bus bar output terminal three, and 131-B is the side B cathode bus bar output terminal one, and 132-B is negative for the side B
Pole busbar output terminal two, 133-B are the side B cathode bus bar output terminal three, and 134-A is the side A negative output terminals one and cathode
Connection structure between busbar bus, 135-A connection structure, 136-A A between the side A negative output terminals two and cathode bus bar bus
Connection structure between side negative output terminals three and cathode bus bar bus, 134-B are that the side B negative output terminals one are total with cathode bus bar
Connection structure between line, 135-B connection structure between the side B negative output terminals two and cathode bus bar bus, 136-B are the side B cathode
Connection structure between output terminal three and cathode bus bar bus, 137 pass through hole for positive input terminal, and 138 be negative input terminal,
139 be cathode bus bar bus, and 140 be alternating current bus bar assembly, and 140-1 is alternating current bus bar U phase, and 140-2 is alternating current bus bar V phase,
140-3 is alternating current bus bar W three-phase, and 141-A is the side A AC output terminal, and 141-B is the side B AC output terminal, and 142 be motor
AC input, 150 be alternating current bus bar structure, and 151 be the side A AC output terminal, and 152 be the side B AC output terminal.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
Embodiment 1
Used in new energy vehicles inverter flows busbar, using symmetrically arranged straight, alternating current bus bar, including DC master row assembly
110 and alternating current bus bar assembly 140, wherein DC master row assembly 110 includes direct-flow positive pole busbar 120 and direct current cathode bus bar
130, direct current is after the processing of dc-link capacitance C voltage regulation filtering by DC master row assembly positive input terminal 127, cathode
Input terminal 138 enters the positive busbar bus 128 and cathode bus bar bus 139 of DC master row assembly, positive busbar bus 128
It is stepped construction with cathode bus bar bus 139, to weaken stray inductance bring adverse effect.It is total that direct current passes through positive busbar
Line 128 shunts, respectively by connection structure 124-A, A side between one 121-A of the side A positive output terminals and positive busbar bus 128
Between two 122-A of positive output terminals and positive busbar bus 128 three 123-A of connection structure 125-A, A side positive output terminals and
It is connected between 128 one 121-B of connection structure 126-A, B side positive output terminals of positive busbar bus and positive busbar bus 128
Connection structure 125-B, B side anode exports between two 122-B of structure 124-B, B side positive output terminals and positive busbar bus 128
Between terminal three and positive busbar bus 128 connection structure 126-B be transmitted to respectively the side A positive output terminals 121-A, 122-A,
The side 123-A and B positive output terminals 121-B, 122-B, 123-B；Direct current is shunted by cathode bus bar bus 139, is passed through respectively
Connection structure 134-A, A side cathode bus bar between one 131-A of the side A cathode bus bar output terminal and cathode bus bar bus 139 is crossed to export
Three 133-A of the side connection structure 135-A, A cathode bus bar output terminal and cathode between two 132-A of terminal and cathode bus bar bus 139
It is connected between 139 one 131-B of the side connection structure 136-A, B cathode bus bar output terminal of busbar bus and cathode bus bar bus 139
The side connection structure 135-B, B cathode between two 132-B of the side structure 134-B, B cathode bus bar output terminal and cathode bus bar bus 139
Connection structure 136-B is transmitted to the side A cathode bus bar output terminal between three 133-B of busbar output terminal and cathode bus bar bus 139
The side 131-A, 132-A, 133-A and B cathode bus bar output terminal 131-B, 132-B, 133-B, wherein positive output terminals with just
Pole busbar bus 128 connection structures 124-A, 125-A, 126-A, 124-B, 125-B, 126-B and negative output terminals and negative
Busbar bus 139 connection structure 134-A, 135-A, 136-A, 134-B, 135-B, 136-B corresponding positions in pole equally use layer
Stack structure further weakens the stray inductance of generation.Direct current passes through the side A positive output terminals and the side A negative output terminals point again
Direct current 102 DC side of the side A power module is not electrically communicated to；Direct current passes through the side B positive output terminals and the side B cathode output end
Direct current is electrically communicated to 103 DC side of the side B power module respectively by son.Direct current is through 103 inversion of power module 102 and power module
At alternating current, three-phase alternating current busbar structure 140-1,140-2,140-3 of alternating current bus bar assembly 140 are to guarantee each phase of impedance phase
Together, using same structure, by taking wherein U phase exchanges busbar structure as an example, power module 102 and power module 103 export U intersection
Galvanic electricity pass through respectively U phase alternating current bus bar 140-1 the side A AC input terminal and the side B AC input terminal confluence after be transmitted to electricity
Machine AC input 142 is eventually transferred to work in motor by motor AC electrical input 142.Principle is such as
Shown in Fig. 1, i.e. Z1+Z2+Z3=Z4+Z5+Z6, wherein Z1~Z4 is DC side equivalent impedance, and Z3, Z6 are the exchange equivalent resistance in side
Anti- value can default Z3=Z6, that is, be required to meet Z1+Z2=Z4+Z5 i.e. because alternating current bus bar assembly respectively mutually uses identical structure
It can.When stream requires not to be strict, DC side can be substantially met using stacking near symmetrical structure, when stream requires ratio
When stringenter, can handle part punching or other modes in DC master row appropriate location, specific location can by emulation and
Test is determined.
Wherein it is possible in the position 141-A, 141-B of each phase alternating current bus bar 140-1,140-2,140-3 of alternating current bus bar assembly
Either the current sensor needed is placed to detect each Xiang Junliu situation in 141-A, 142 positions or 141-B, 142 positions.
Embodiment 2
Implementation principle and except alternating current bus bar outer portion is with embodiment 1, considers to work as the biggish situation of electric current, alternating current bus bar is used
It is thicker that one integrated busbar structure will lead to busbar, and when connection such as process is bad, only faying face can not be made close by attachment force
Fitting, so as to cause line contact, localized contact resistance is excessive and causes hot-spot, and Fig. 8 is a kind of symmetrical mother of assembling combination
Row, identical two busbar as shown in Figure 9 is constituted, in the case that electric current is certain after confluence, Fig. 8 conducting copper and implementation
Fig. 7 current-carrying capability is identical in example 1, and conducting copper 151,152 can be big with thickness under the premise of guaranteeing the current-carrying capability of demand
Big to reduce, deformability is stronger when by local pressure, and guarantee is closed even closer with connected face paste after compensation deformation, thus
Guarantee that connection is reliable at electrical connection.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of new energy vehicle inverter stream busbar, which is characterized in that use symmetrically arranged DC master row assembly and friendship
Flow busbar assembly；DC master row assembly includes direct-flow positive pole busbar and direct current cathode bus bar, and direct-flow positive pole busbar connects inverter
Direct-flow positive pole input terminal and each power module positive terminal, direct current cathode bus bar connect inverter direct current negative input
With the negative terminal of each power module, direct-flow positive pole busbar and direct current cathode bus bar arranged stacked；Alternating current bus bar includes that U phase is female
Row, V phase busbar, W phase busbar, U phase busbar connect the U phase input terminal of each power module U phase output terminals and load in inverter
Son, V phase busbar connect the V phase input terminal of each power module V phase output terminals and load in inverter, and the connection of W phase busbar is inverse
Become the W phase input terminal of each power module W phase output terminals and load in device.
2. a kind of new energy vehicle inverter as described in claim 1 stream busbar, which is characterized in that the direct-flow positive pole is female
Row includes positive input terminal, positive busbar bus and multiple positive output terminals, and direct current passes through positive busbar bus and shunts,
Corresponding positive output terminals are transferred to by respective connection structure respectively；The direct current cathode bus bar includes negative input
Son, cathode bus bar bus and multiple negative output terminals, direct current are shunted by cathode bus bar bus, pass through respective company respectively
Binding structure is transferred to corresponding negative output terminals；Connection structure between each positive output terminals and positive busbar bus and corresponding
Connection structure corresponding position between each negative output terminals and cathode bus bar bus of position uses stepped construction；Positive busbar is total
Line and cathode bus bar bus are stepped construction.
3. a kind of new energy vehicle inverter as described in claim 1 is with flowing busbar, which is characterized in that the power module is
Integrated three phase full bridge power module or three-phase half-bridge module.
4. a kind of new energy vehicle inverter as described in claim 1 stream busbar, which is characterized in that the power module is put
Setting mode is back-positioned type modes of emplacement.
5. a kind of new energy vehicle inverter as described in claim 1 is with flowing busbar, which is characterized in that the DC master row is
The conductive metal of absolute construction is arranged, or is built in bus capacitor and is arranged with the integrated conductive metal of bus capacitor.
6. a kind of new energy vehicle inverter as described in claim 1 stream busbar, which is characterized in that the direct-flow positive pole is female
Monosymmetric stretching connecting terminal is arranged for connecting with each parallel power module positive terminal of the same name；The direct current cathode bus bar
Monosymmetric stretching connecting terminal with each parallel power module negative terminal of the same name for connecting.
7. a kind of new energy vehicle inverter as described in claim 1 stream busbar, which is characterized in that the DC master row is just
Completely cut off between cathode bus bar by dielectric.
8. a kind of new energy vehicle inverter as described in claim 1 stream busbar, which is characterized in that the alternating current bus bar
Each phase busbar is that the conductive metal of single structure is arranged, or the composite structure of the assembled one of structure is arranged for multiple independent metals.
9. a kind of new energy vehicle inverter as described in claim 1 stream busbar, which is characterized in that the alternating current bus bar
Each phase busbar, which should have a distance that can penetrate current sensor or other, can survey current device.
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| CN201910149606.4A CN109889058A (en) | 2019-02-28 | 2019-02-28 | A kind of new energy vehicle inverter stream busbar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113179031A (en) * | 2021-04-28 | 2021-07-27 | 北京新能源汽车技术创新中心有限公司 | Integrated dc-to-ac converter direct current supports electric capacity, motor and vehicle |
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| CN1622115A (en) * | 2003-11-27 | 2005-06-01 | 凌阳科技股份有限公司 | System for accessing a plurality of devices using the same busbar and master control device therein |
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