CN103916025A - Power conversion unit - Google Patents
Power conversion unit Download PDFInfo
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- CN103916025A CN103916025A CN201310004750.1A CN201310004750A CN103916025A CN 103916025 A CN103916025 A CN 103916025A CN 201310004750 A CN201310004750 A CN 201310004750A CN 103916025 A CN103916025 A CN 103916025A
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Abstract
The invention provides a power conversion unit which comprises an inverter circuit, a frame, an input interface and an output interface. The inverter circuit is used for converting direct current to alternating current, and the frame is arranged outside the inverter circuit in a surrounding mode and fixedly connected with all electric elements in the inverter circuit. The input interface is arranged on the outer side of the frame and used for connecting the inverter circuit and an external direct-current circuit. The output interface is arranged on the outer side of the frame and used for connecting the inverter circuit and an external load device. The power conversion unit can solve the problem that an existing power conversion unit is complex in layout, and not convenient to install and maintain in the actual using process.
Description
Technical field
The embodiment of the present invention relates to electrical technology, relates in particular to a kind of power conversion unit.
Background technology
In track traffic technique, the power conversion unit of locomotive is the core component of locomotive auxiliary inversion system, its major function is, connect the DC loop of locomotive and the auxiliary power consumption equipment of locomotive, specifically, the DC loop of locomotive is carried out inversion by power conversion unit, changes into three-phase alternating current, resupplies the auxiliary power consumption equipment of locomotive.
Main circuit in the power conversion unit of locomotive is inverter circuit, inverter circuit is generally by igbt (Insulate-Gate Bipolar Transistor, be called for short: IGBT) device, electric capacity, resistance and control module form, general by cable or copper bar connection between each electric component, when use, each electric component is directly installed on rack.
The power conversion unit of prior art layout complexity in rack is in disorder, is not easy in actual use install and safeguard.
Summary of the invention
The invention provides a kind of power conversion unit, to solve the complicated in disorder problem that is not easy in actual use installation and safeguards causing of power conversion cell layout of prior art.
The invention provides a kind of power conversion unit, comprising: inverter circuit, for direct current is converted into alternating current; Framework, is around in the outside at described inverter circuit, and is fixedly connected with each electric component in described inverter circuit; Input interface, is arranged on the outside of described framework, for connecting described inverter circuit and outside DC circuit; Output interface, is arranged on the outside of described framework, for connecting described inverter circuit and external loading equipment.
Further, above-mentioned power conversion unit, can comprise: insulated compound busbar, be arranged on described framework inside, and described insulated compound busbar is laid at least two layers of conductive layer, for connecting each electric component of described inverter circuit; At least three insulated gate bipolar transistor IGBTs, at least one electric capacity and at least one resistance, for forming inverter main circuit, the conductive layer by described insulated compound busbar between described IGBT, electric capacity and resistance is electrically connected; Control module, is arranged on described framework inside, is connected, for controlling the operating state of described IGBT with described IGBT.
Further, above-mentioned power conversion unit, can comprise: control interface, for connecting outside control unit; Drive circuit board, is provided with driving interface on it, be connected with described IGBT, and described drive circuit board produces and drives signal for the control signal of sending according to outside control unit, drives described IGBT work; Whether temperature detect switch, be greater than threshold value for detection of the temperature of described power conversion unit, and the information whether described temperature is greater than threshold value is sent to described external control unit.
Further, above-mentioned power conversion unit, the shape of cross section of described insulated compound busbar can be L-type; The quantity of described IGBT can be six, and the bottom surface of described L-type insulated compound busbar is connected with six described IGBT; In described electric capacity, at least comprise eight Support Capacitors, be divided into two rows, be connected respectively with the vertical plane of described L-type insulated compound busbar, described Support Capacitor is fixedly connected on described framework by insulating carriage; Described drive circuit board is fixedly connected with described frame facet.
Further, above-mentioned power conversion unit, described input interface can be copper contact pin connector, the quantity of described input interface is 2, connects respectively positive pole and the negative pole of outside DC circuit; Described output interface is copper contact pin connector, and the quantity of described output interface is 3, is respectively used to export three-phase alternating current; Described control interface is SMS connector; Described driving interface is pin connector.
Further, above-mentioned power conversion unit, can also comprise: radiator, described radiator is arranged on the bottom side of described framework.
Further, above-mentioned power conversion unit, described power conversion unit can be fixed on described framework on the mounting panel of rack by long bolt.
Power conversion provided by the invention unit, by being around in the framework in inverter circuit outside, realize each components and parts of inverter circuit and complicated cabling are encapsulated in framework, realize respectively and being connected of outside DC circuit and load circuit by input interface and output interface again, thereby realize power conversion unit-modularized, thereby avoid power conversion unit complicated in disorder layout in rack, thereby be convenient to installation and maintenance.
Accompanying drawing explanation
Fig. 1 is the structural representation of power conversion of the present invention unit embodiment mono-;
Fig. 2 is the structural representation of power conversion of the present invention unit embodiment bis-;
Fig. 3 is the structural representation of power change unit embodiment tri-of the present invention;
Fig. 4 is the perspective view that designs a kind of power conversion unit for a concrete inverter circuit embodiment illustrated in fig. 3;
Fig. 5 is the circuit structure diagram of the corresponding inverter circuit in power conversion unit shown in Fig. 4;
Fig. 6 is the enlarged drawing of insulated compound busbar in Fig. 4.
Embodiment
Fig. 1 is the structural representation of power conversion of the present invention unit embodiment mono-, and as shown in Figure 1, the power conversion unit of the present embodiment can comprise: inverter circuit 1, for direct current is converted into alternating current; Framework 2, is around in the outside at described inverter circuit, and is fixedly connected with each electric component in described inverter circuit 1; Input interface 3, is arranged on the outside of described framework 2, for connecting described inverter circuit 1 and outside DC circuit; Output interface 4, is arranged on the outside of described framework 2, for connecting described inverter circuit 1 and external loading equipment.
In the time of specific implementation, the index that inverter circuit 1 can be according to actual needs, for example power requirement of the voltage of locomotive DC loop, electric current and auxiliary power consumption equipment, designs applicable circuit.After determining circuit structure and having selected each components and parts, arrange each components and parts and cable according to principle compact as far as possible and that do not affect electrical property again, for example stepped construction, estimates the needed volume of this circuit, customize again framework 2, be around in the outside of inverter circuit 1.In the time arranging the structure of inverter circuit 1, the input of inverter circuit 1 and output can also be led to respectively to the outside of framework 2, or directly input and output are arranged on framework 2, and on framework 2 outsides or framework 2, corresponding interface are installed, be i.e. input interface 3 and input interface 4.Like this, just form modular power conversion unit, even if the circuit structure in inverter circuit 1 and cabling are very complicated, for installation and maintenance personnel, can not increase the complexity of its work, and only need to pay close attention to, the performance of this power conversion whole unit input interface 3 qualified and power conversion unit is correct with being connected of outside DC circuit, input interface 4 is correct with being connected of external load circuit.
The present embodiment, by being around in the framework in inverter circuit outside, realize each components and parts of inverter circuit and complicated cabling are encapsulated in framework, realize respectively and being connected of outside DC circuit and load circuit by input interface and input interface again, thereby realize power conversion unit-modularized, thereby avoid power conversion unit complicated in disorder layout in rack, thereby be convenient to installation and maintenance.
Above-mentioned power conversion unit, in the time of actual installation, can be fixed on described framework on the mounting panel of rack by long bolt.
Fig. 2 is the structural representation of power conversion of the present invention unit embodiment bis-, as shown in Figure 2, on the basis of the unit embodiment of power conversion shown in Fig. 1, preferably, the inverter circuit of the present embodiment can comprise: insulated compound busbar 11, be arranged on the inside of described framework 2, insulated compound busbar 11 is laid at least two layers of conductive layer, for connecting each electric component of inverter circuit 1; At least three igbt (Insulated Gate Bi-polar Transistor, IGBT) 12, at least one electric capacity 13 and at least one resistance 14 be called for short:, be used for forming inverter circuit, the conductive layer by insulated compound busbar 11 between IGBT12, electric capacity 13 and resistance 14 is electrically connected; Control module 15, is arranged on the inside of framework 2, is connected, for controlling the operating state of IGBT12 with IGBT12.
Further, control module 15 can comprise: control interface 151, for connecting outside control unit; Drive circuit board 152, is provided with on it and drives interface 1521, is connected with IGBT12, and drive circuit board 152 produces and drives signal for the control signal of sending according to outside control unit, drives described IGBT12 work; Whether temperature detect switch 153, be greater than threshold value for detection of the temperature of power conversion unit, and the information whether temperature is greater than threshold value is sent to external control unit.
The power conversion unit of the present embodiment compared with prior art, an important difference is to replace common metal row of the prior art or cable with insulated compound busbar 11, connect each electric component in inverter circuit 1, and insulated compound busbar 11 is compared with common metal row and cable, have the following advantages: volume is less; The connection of each device is more convenient, circuit design can be obtained to more concision and compact, thereby can save space; Circuit stray inductance is less, and this can reduce for IGBT the electric elements probability of damage causing due to voltage breakdown, thereby can improve the reliability of whole inverter circuit 1; The shape of insulated compound busbar 11 can be made to measure according to the structure of circuit, can further reduce volume, is also convenient to the installation of each electric component.
When specific implementation, can be according to the shape and size of the structural design insulated compound busbar 11 of inverter circuit 1, and reserve the through hole that each electric component is installed in corresponding position, then according to this design customization insulated compound busbar 11, so that the shared space of inverter circuit 1 is as far as possible little.When installation, each IGBT12, electric capacity 13 and resistance 14, can be connected on the through hole of insulated compound busbar 11 by the mode screwing togather according to designed circuit structure.And in control module 15 volume relatively large be drive circuit board 152, the position of arrangements control module 15 that therefore can be based on drive circuit board 152, for example, be arranged on drive circuit board 152 on a sidewall of framework 2; Control interface 151 can be arranged on drive circuit board on 152, and outside control unit transmits control signal to control module 15 by control interface 151; Temperature detect switch 153 is arranged on the inside of framework 2, for example, on insulated compound busbar 11 or drive circuit board 152, can preset the numerical value of temperature, when the temperature of power conversion unit is during higher than this preset value, the state of temperature detect switch 153 will convert, and this switching signal is sent to outside control unit by control interface 151.
The present embodiment, connects each electric component in inverter circuit by insulated compound busbar, has further facilitated the modularized design of power conversion unit, and can increase integrated level, reduces volume, and improves reliability.
Fig. 3 is the structural representation of power change unit embodiment tri-of the present invention, as shown in Figure 3, on the basis of the unit embodiment of power conversion shown in Fig. 2, the power change unit of the present embodiment can also comprise: radiator 16, radiator 16 can be arranged on the bottom side of described framework, and radiator 16 can adopt air-cooled radiator.
Fig. 4 is the perspective view that designs a kind of power conversion unit for a concrete inverter circuit embodiment illustrated in fig. 3, and Fig. 5 is the circuit structure diagram of the corresponding inverter circuit in power conversion unit shown in Fig. 4.As shown in Figure 5, V1 ~ V6 is six IGBT12, forms the three-phase inversion main circuit of two-tube parallel connection, realizes the power conversion of direct current to three-phase alternating current; C1 ~ C3 is the overvoltage Absorption Capacitance 13 in three-phase inversion main circuit, is used for absorbing the overvoltage producing in DC loop when IGBT12 turn-offs; C4 ~ C11 is the DC terminal Support Capacitor 13 of three-phase inversion main circuit, is used for supporting DC loop voltage, guarantees that the fluctuation of DC loop voltage is in the scope requiring; R1, R2 are the discharge resistance 14 of DC loop, for guaranteeing that, after main circuit power-off, the residual voltage on DC loop electric capacity is reduced to below safe voltage within the time requiring.The direct current input interface 3 that direct-flow positive pole (DC+), direct current negative pole (DC-) are power cell; Three-phase R, the S of three-phase alternating current, the output interface 4 that T is power cell.Three drive circuit board 152(Driver1 ~ Driver3) form the drive circuit of IGBT12, every drive circuit board 152 receives the two path control signal that outside control unit provides, two IGBT cell operation that drive an inverter bridge leg feed back to control unit by IGBT12 switch state signal simultaneously.
When specific implementation, can be take radiator as basis, at the framework 2 of 6 IGBT12 shown in the surperficial installation diagram 4 of radiator 16,2 resistance 14 and temperature detect switch 153 and power cell.Insulated compound busbar 11 can adopt the shape of L-type, and Fig. 6 is the enlarged drawing of insulated compound busbar in Fig. 4, and as shown in Figure 6, the shape of cross section of insulated compound busbar 11 is L-type.As shown in Figure 4 and Figure 5, the quantity of IGBT12 is six, and the bottom surface of L-type insulated compound busbar 11 is connected with six IGBT12; In electric capacity 13, at least comprise eight Support Capacitors, be divided into two rows, be connected respectively with the vertical plane of L-type insulated compound busbar 11, described Support Capacitor is fixedly connected on framework 2 by insulating carriage; Drive circuit board 152 is fixedly connected with the side of framework 2.
Further and preferably, the input interface 3 of the present embodiment is copper contact pin connector, the quantity of input interface 3 is 2, connects respectively positive pole (DC+) and the negative pole (DC-) of outside DC circuit; Output interface 4 is copper contact pin connector, and the quantity of output interface 4 is 3, is respectively used to export the three-phase (R, S, T) of three-phase alternating current; The copper contact pin connector of input interface 3 and output interface 4, can be high-power copper contact pin connector, and for example can select to adopt diameter is the copper contact pin connector of 12 millimeters.The control interface 151 that connects drive circuit board 152 and external control unit in control module 15 can be SMS connector, and for example selecting model is the connector of SMS12GE4J; Driving interface 1521 on drive circuit board 152 can be pin connector.
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 power conversion unit, is characterized in that, comprising:
Inverter circuit, for being converted into alternating current by direct current;
Framework, is around in the outside of described inverter circuit, and is fixedly connected with each electric component in described inverter circuit;
Input interface, is arranged on the outside of described framework, for connecting described inverter circuit and outside DC circuit;
Output interface, is arranged on the outside of described framework, for connecting described inverter circuit and external loading equipment.
2. power conversion according to claim 1 unit, is characterized in that, described inverter circuit comprises:
Insulated compound busbar, is arranged on described framework inside, and described insulated compound busbar is laid at least two layers of conductive layer;
At least three insulated gate bipolar transistor IGBTs, at least one electric capacity and at least one resistance, for forming inverter circuit, the conductive layer by described insulated compound busbar between described IGBT, electric capacity and resistance is electrically connected;
Control module, is arranged on described framework inside, is connected, for controlling the operating state of described IGBT with described IGBT.
3. power conversion according to claim 2 unit, is characterized in that, described control module comprises:
Control interface, for connecting outside control unit;
Drive circuit board, is provided with driving interface on it, be connected with described IGBT, and described drive circuit board produces and drives signal for the control signal of sending according to outside control unit, drives described IGBT work;
Whether temperature detect switch, be greater than threshold value for detection of the temperature of described power conversion unit, and the information whether described temperature is greater than threshold value is sent to described external control unit.
4. power conversion according to claim 3 unit, is characterized in that:
The shape of cross section of described insulated compound busbar is L-type;
The quantity of described IGBT is six, and the bottom surface of described L-type insulated compound busbar is connected with six described IGBT;
In described electric capacity, at least comprise eight Support Capacitors, be divided into two rows, be connected respectively with the vertical plane of described L-type insulated compound busbar, described Support Capacitor is fixedly connected on described framework by insulating carriage;
Described drive circuit board is fixedly connected with described frame facet.
5. power conversion according to claim 4 unit, is characterized in that:
Described input interface is copper contact pin connector, and the quantity of described input interface is 2, connects respectively positive pole and the negative pole of outside DC circuit;
Described output interface is copper contact pin connector, and the quantity of described output interface is 3, is respectively used to export three-phase alternating current; Described control interface is SMS connector;
Described driving interface is pin connector.
6. power conversion according to claim 5 unit, is characterized in that, also comprises: radiator, described radiator is arranged on the bottom side of described framework.
7. power conversion according to claim 6 unit, is characterized in that, described power conversion unit is fixed on described framework on the mounting panel of rack by long bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310004750.1A CN103916025A (en) | 2013-01-07 | 2013-01-07 | Power conversion unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310004750.1A CN103916025A (en) | 2013-01-07 | 2013-01-07 | Power conversion unit |
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| CN103916025A true CN103916025A (en) | 2014-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310004750.1A Pending CN103916025A (en) | 2013-01-07 | 2013-01-07 | Power conversion unit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104167933A (en) * | 2014-09-04 | 2014-11-26 | 永济新时速电机电器有限责任公司 | Novel power conversion unit allowing laminated coating row and composite busbar to be used in hybrid mode |
| CN104767418A (en) * | 2015-04-22 | 2015-07-08 | 永济新时速电机电器有限责任公司 | Motor train unit auxiliary inverter power module |
| CN109874383A (en) * | 2017-09-07 | 2019-06-11 | 日本精工株式会社 | Control device of electric motor and the electric power steering apparatus for being equipped with the control device of electric motor |
| WO2019113922A1 (en) * | 2017-12-11 | 2019-06-20 | 中车永济电机有限公司 | Power conversion unit, auxiliary locomotive power supply current conversion circuit, and locomotive |
| CN110168899A (en) * | 2016-12-14 | 2019-08-23 | 三菱电机株式会社 | Power conversion device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104167933A (en) * | 2014-09-04 | 2014-11-26 | 永济新时速电机电器有限责任公司 | Novel power conversion unit allowing laminated coating row and composite busbar to be used in hybrid mode |
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| CN109874383A (en) * | 2017-09-07 | 2019-06-11 | 日本精工株式会社 | Control device of electric motor and the electric power steering apparatus for being equipped with the control device of electric motor |
| WO2019113922A1 (en) * | 2017-12-11 | 2019-06-20 | 中车永济电机有限公司 | Power conversion unit, auxiliary locomotive power supply current conversion circuit, and locomotive |
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Application publication date: 20140709 |