CN204835926U - A high -power high frequency electric gas isolating device for on -vehicle auxiliary electrical power source - Google Patents
A high -power high frequency electric gas isolating device for on -vehicle auxiliary electrical power source Download PDFInfo
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- CN204835926U CN204835926U CN201520293567.2U CN201520293567U CN204835926U CN 204835926 U CN204835926 U CN 204835926U CN 201520293567 U CN201520293567 U CN 201520293567U CN 204835926 U CN204835926 U CN 204835926U
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Abstract
The utility model provides a high -power high frequency electric gas isolating device for on -vehicle auxiliary electrical power source, includes: high frequency inverter unit, the input and in advance charging circuit link to each other, its full bridge inverter adopts IGBT to be used for carrying on the isolation on energy transfer and former limit as power device, high -frequency transformer, secondary rectifier unit is used for with the interchange square -wave voltage rectification on high -frequency transformer limit for the pulsating direct current, output filtering unit, including time limit resonance circuit and time limit LC filter circuit, inferior limit resonance circuit passes through the change of resonance circuit stored energy, changes the change of former limit power device hysteresis arm electric current, inferior limit LC filter circuit is used for the output DC voltage of inferior limit pulsating direct current filtering for the smoothness, the isolating driver unit is used for converting the pulse drive signal who comes from the control unit into IGBT switching signal, and the IGBT trouble that detects sensor detecting element simultaneously feeds back to the control unit. The utility model has the advantages of small, light in weight, with low costs, the electric isolation is effectual.
Description
Technical field
The utility model is mainly concerned with field of railway transportation equipment, refers in particular to a kind of high-power high-frequency electricity isolation device being applicable to vehicle-mounted accessory power supply in Transit Equipment.
Background technology
Vehicle-mounted auxiliary power unit comprises SIV and charger.SIV is vehicle-mounted subordinate inverter, is used to as car load air compressor machine, air-conditioning etc. provide the supply unit of AC380V power supply.In traditional vehicle-mounted auxiliary power unit, the electrical isolation mode that SIV generally adopts Industrial Frequency Transformer to isolate.Along with the development of train technical, passenger requires more and more higher to Comfortability of Train, and the change of assistant load on car, the capacity of auxiliary power unit also requires increasing, and the restriction in the space of train own and the strict demand to component weight, on train, assistant load is more and more higher to the volume of SIV, capacity requirement, and this is just more and more harsher to the weight demands of SIV.Therefore, adopt the SIV of Industrial Frequency Transformer isolation under these impacts required, its defect is got over utility model and is shown, and the design difficulty of SIV is also increasing.
Simultaneously, tradition vehicle-mounted SIV due to its input voltage range wide, as subway input voltage has 750V(scope 525V-900V) and 1500V(scope 1000V-1800V) two kinds, this just requires that SIV is when designing, need to take into full account the impact of the operating mode of various complexity on the various device of SIV, be unfavorable for so very much modularization and the seriation of SIV.
Utility model content
The technical problems to be solved in the utility model is just: the technical problem existed for prior art, the utility model provides the high-power high-frequency electricity isolation device for vehicle-mounted accessory power supply that a kind of volume is little, lightweight, cost is low, electrical isolation is effective.
For solving the problems of the technologies described above, the utility model by the following technical solutions:
For a high-power high-frequency electricity isolation device for vehicle-mounted accessory power supply, comprising:
High-frequency inversion unit, input is connected with pre-charge circuit; It comprises full bridge inverter and high frequency transformer, and described full bridge inverter adopts IGBT as power device, and described high frequency transformer is used for carrying out the isolation on energy transferring and former limit;
Secondary rectification unit, being used for the ac square-wave voltage rectification on high frequency transformer time limit is pulsating direct current;
Output filtering unit, comprise time limit resonant circuit and time limit LC filter circuit, described limit resonant circuit, by the change of resonant circuit stored energy, changes the change of former limit power device lagging leg electric current; Described limit LC filter circuit is used for the pulsating direct current of secondary limit to be filtered into level and smooth output dc voltage;
Isolation drive unit, is used for the pulse drive signal from control unit to be converted to IGBT switching signal, the IGBT fault that transducer detecting unit detects is fed back to control unit simultaneously.
As further improvement of the utility model: described full bridge inverter adopts the connected mode of composite bus bar.
As further improvement of the utility model: described control unit adopts microcomputer control unit, is used for realizing Systematical control and monitoring function.
Compared with prior art, the utility model has the advantage of:
1, high-power high-frequency electricity isolation device of the present utility model, can solve the volume and weight problem of the vehicle-mounted auxiliary power unit of traditional isolation method, enables the inverter/converter of auxiliary converter device be convenient to modularization and seriation.
2, high-power high-frequency electricity isolation device of the present utility model, adopt the soft switch technique of transformer secondary clamper, secondary adopts the mode of series connection, when guarantee system is run under high-power high-voltage operating mode, the voltage stress in secondary auxiliary resonance loop can be effectively reduced, improve system reliability.
3, high-power high-frequency electricity isolation device of the present utility model, when high-power operation (more than 40kW), when adopting phase shifting control, full bridge inverter adopts composite bus bar to realize electric connecting mode, facilitates high frequency to the modularization of device.
4, high-power high-frequency electricity isolation device of the present utility model, by the pulse duration of regulating power pipe, makes the constant or approximately constant of output voltage, simplifies late-class circuit design.When capacity is identical, effectively can reduces the volume of vehicle-mounted auxiliary power unit, reduce its weight; By regulation output voltage, make it to be a steady state value or approximately constant value, facilitate late-class circuit design safety degree, seriation; Adopt the connected mode of composite bus bar, the degree of modularity of high-frequency isolating device can be made to promote further.
Accompanying drawing explanation
Fig. 1 is application principle schematic diagram of the present utility model.
Fig. 2 is the structural principle schematic diagram of the utility model in embody rule example.
Fig. 3 is the circuit theory schematic diagram of the utility model in embody rule example.
Fig. 4 is the topological structure schematic diagram of the utility model control unit in embody rule example.
Marginal data:
1, high-frequency inversion unit; 101, full bridge inverter; 102, high frequency transformer; 2, secondary rectification unit; 3, output filtering unit; 301, secondary limit resonant circuit; 302, secondary limit LC filter circuit; 4, transducer detecting unit; 5, isolation drive unit; 6, control unit.
Embodiment
Below with reference to Figure of description and specific embodiment, the utility model is described in further details.
High-power high-frequency electricity isolation device of the present utility model is used for realizing the electrical isolation of metro auxiliary power supply device constrained input, to simplify the input operating mode of inversion convertor assembly.The input of electricity isolation device and precharge and filter, input power are connected, output through inverter with exchange assistant load and be connected, be connected with direct current assistant load through battery charger.As shown in Figure 1, Figure 2 and Figure 3, high-power high-frequency electricity isolation device for vehicle-mounted accessory power supply of the present utility model, comprise high-frequency inversion unit 1, secondary rectification unit 2, output filtering unit 3, transducer detecting unit 4, isolation drive unit 5 and control unit 6, the input of high-frequency inversion unit 1 is connected with pre-charge circuit, and the output of high-frequency inversion unit 1 is connected with secondary rectification unit 2, output filtering unit 3 successively.Wherein:
High-frequency inversion unit 1, be used for being connected with pre-charge circuit, it comprises full bridge inverter 101 and high frequency transformer 102, full bridge inverter 101 adopts IGBT as power device, the switching frequency of inverter circuit is improved by soft switch technique, reduce power device loss, improve system effectiveness.In this example, full bridge inverter 101 adopts the connected mode of composite bus bar, to facilitate modularized design.The utility model is by high frequency transformer 102(T1) achieve the isolation on energy transferring and former limit, owing to adopting high frequency technique, volume of transformer is reduced greatly, and weight reduces greatly, thus achieves the lightweight of spacer assembly.
Secondary rectification unit 2, being used for the ac square-wave voltage rectification on high frequency transformer 102 limits is pulsating direct current, and auxiliary change adopts the mode of series connection, makes system can output HIGH voltage, improves system effectiveness, simplifies system.
Output filtering unit 3 comprises time limit resonant circuit 301 and time limit LC filter circuit 302, secondary limit resonant circuit 301 is used for effectively realizing former limit power device Sofe Switch, by the change of resonant circuit stored energy, change the change of former limit power device lagging leg electric current, make former limit switching loss reach minimum, realize the object of Sofe Switch.Secondary limit LC filter circuit 302 is used for the pulsating direct current of secondary limit to be filtered into more level and smooth output dc voltage, participate in circuit resonance simultaneously, make the power device on the former limit of high frequency transformer 102 conveniently realize Sofe Switch, reach raising switching frequency, reduce the object of system bulk.
Isolation drive unit 5, is used for the pulse drive signal from control unit 6 to be converted to IGBT switching signal, the IGBT fault that transducer detecting unit 4 detects is fed back to control unit 6 simultaneously.
In the present embodiment, control unit 6 adopts microcomputer control unit, is used for realizing Systematical control and monitoring function.Control unit 6 is used for completing various protection, logic control and self-diagnostic function according to various feedback quantity and state information, and produces IGBT trigger impulse.In addition, the start and stop of the utility model high-frequency isolating device, the action etc. of contactor are all controlled by microcomputer control unit, and such high-frequency isolating device can realize soft start function.Simultaneously; also can realize the defencive functions such as input and output overvoltage/undervoltage, output overcurrent, short circuit, radiator be overheated; the utility model high-frequency isolating device by Ethernet and host computer transmission of information, can detect high-frequency isolating device data by man-machine interface further easily.As shown in Figure 4, be the topological structure principle schematic of control unit 6 when embody rule.High-frequency isolating device of the present utility model is made to have perfect defencive function by said structure; these defencive functions can make charger when not adding any peripheral protective device; orderly shutdown system; also there is self-diagnostic function simultaneously; can by the running status of the light-emitting diode display inquiry high-frequency isolating device of control unit 6; people and connection interface are very friendly; by network, the running status of high-frequency isolating device is sent to host computer simultaneously, self also will carries out record to fault simultaneously.
As from the foregoing, said structure of the present utility model for can adapt to wide range input, and is input as the high power D C/DC high frequency isolation type device of high pressure.Adopt the mode of high frequency transformer 102 limit series connection, effectively reduce the stress of system device, achieve the object of the convenient design of resonator system parameter.Output voltage is high pressure constant voltage or is output voltage approximate constant voltage (fluctuation range is far smaller than input power fluctuation range), to facilitate late-class circuit modularization, and seriation.Whole high-frequency inversion device adopts high-frequency soft switch implementation, and switching frequency is at least greater than 10k.By adopting microcomputer control unit, whole system adopts digital Control Technology, and can facilitate the output voltage of amendment system, directly can be connected from the inverter/converter of different electric pressure, system suitability is wide; Microcomputer control unit has very perfect on-line monitoring and fault logging function, and can know the running status of spacer assembly all parts easily, power at least accomplishes more than 40kW.
Below be only preferred implementation of the present utility model, protection range of the present utility model be not only confined to above-described embodiment, all technical schemes belonged under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, not departing from the some improvements and modifications under the utility model principle prerequisite, protection range of the present utility model should be considered as.
Claims (3)
1., for a high-power high-frequency electricity isolation device for vehicle-mounted accessory power supply, it is characterized in that, comprising:
High-frequency inversion unit (1), input is connected with pre-charge circuit; It comprises full bridge inverter (101) and high frequency transformer (102), and described full bridge inverter (101) adopts IGBT as power device, and described high frequency transformer (102) is used for carrying out the isolation on energy transferring and former limit;
Secondary rectification unit (2), being used for the ac square-wave voltage rectification on high frequency transformer (102) secondary limit is pulsating direct current;
Output filtering unit (3), comprise time limit resonant circuit (301) and time limit LC filter circuit (302), described limit resonant circuit (301), by the change of resonant circuit stored energy, changes the change of former limit power device lagging leg electric current; Described limit LC filter circuit (302) is used for the pulsating direct current of secondary limit to be filtered into level and smooth output dc voltage;
Isolation drive unit (5), is used for the pulse drive signal from control unit (6) to be converted to IGBT switching signal, the IGBT fault that transducer detecting unit (4) detects is fed back to control unit (6) simultaneously.
2. the high-power high-frequency electricity isolation device for vehicle-mounted accessory power supply according to claim 1, is characterized in that, described full bridge inverter (101) adopts the connected mode of composite bus bar.
3. the high-power high-frequency electricity isolation device for vehicle-mounted accessory power supply according to claim 1 and 2, is characterized in that, described control unit (6) adopts microcomputer control unit, is used for realizing Systematical control and monitoring function.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520293567.2U CN204835926U (en) | 2015-05-08 | 2015-05-08 | A high -power high frequency electric gas isolating device for on -vehicle auxiliary electrical power source |
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| CN201520293567.2U CN204835926U (en) | 2015-05-08 | 2015-05-08 | A high -power high frequency electric gas isolating device for on -vehicle auxiliary electrical power source |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452084A (en) * | 2016-10-18 | 2017-02-22 | 北京交通大学 | Preceding-stage high-frequency DC-DC converter applicable to high-voltage large-power auxiliary convertor |
| CN115360749A (en) * | 2022-08-15 | 2022-11-18 | 株洲中车时代电气股份有限公司 | AC/DC parallel control system and method and electronic equipment |
-
2015
- 2015-05-08 CN CN201520293567.2U patent/CN204835926U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452084A (en) * | 2016-10-18 | 2017-02-22 | 北京交通大学 | Preceding-stage high-frequency DC-DC converter applicable to high-voltage large-power auxiliary convertor |
| CN115360749A (en) * | 2022-08-15 | 2022-11-18 | 株洲中车时代电气股份有限公司 | AC/DC parallel control system and method and electronic equipment |
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Address after: The age of 412001 in Hunan Province, Zhuzhou Shifeng District Road No. 169 Patentee after: ZHUZHOU CRRC TIMES ELECTRIC Co.,Ltd. Address before: The age of 412001 in Hunan Province, Zhuzhou Shifeng District Road No. 169 Patentee before: ZHUZH CSR TIMES ELECTRIC Co.,Ltd. |