CN104135055A - Traction battery charger for engineering maintenance vehicle - Google Patents
Traction battery charger for engineering maintenance vehicle Download PDFInfo
- Publication number
- CN104135055A CN104135055A CN201410388100.6A CN201410388100A CN104135055A CN 104135055 A CN104135055 A CN 104135055A CN 201410388100 A CN201410388100 A CN 201410388100A CN 104135055 A CN104135055 A CN 104135055A
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- 238000012423 maintenance Methods 0.000 title abstract description 13
- 238000002955 isolation Methods 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 claims description 16
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a traction battery charger for an engineering maintenance vehicle. The traction battery charger comprises a microcomputer control unit. The microcomputer control unit is respectively connected with a chopper charging circuit and a four-quadrant rectifier circuit through two isolation drive units; the input end of the chopper charging circuit is connected with a DC input pre-charging circuit; the output end of the chopper charging circuit is connected with the input end of the four-quadrant rectifier circuit; the output end of the four-quadrant rectifier circuit is connected with an AC input pre-charging circuit; the AC input pre-charging circuit is connected with an AC power supply; the DC input pre-charging circuit is connected with a DC power supply; a chopper circuit is connected with an output circuit; an engineering maintenance vehicle AC bus is connected between the four-quadrant rectifier circuit and the AC input pre-charging circuit in parallel. The circuits of the traction battery charger are high in fault tolerance.
Description
Technical field
The present invention relates to a kind of engineering truck traction charger.
Background technology
Power engineering maintenance cart in subway construction, shunt, transport maintenance of equipment, carry out accident rescue etc., play very important effect, traction accumulator is as the traction energy for subsequent use of engineering maintenance vehicle, guarantee that engineering maintenance vehicle is not in the situation that there is no input power, still can within the regular hour, normally work.
Prepare in the construction of subway, operation, test run with and each stage such as formal operation, exist in storehouse and two kinds of operating modes of main track, the input energy sources of traction accumulator charger exists uncertain greatly, this just requires traction accumulator charger in different input power situations, can both charge a battery; Meanwhile, traction accumulator, as the traction energy, requires charger to have the ability of high voltage output.
Under the background of, miniaturization integrated at railway equipment, require the volume of traction accumulator charger as far as possible little, light as far as possible, the integrated degree of weight is high as far as possible.
In the time of car brakeing, require charger braking energy can be fed back to storage battery to greatest extent, vehicle energy can repeatedly be utilized.
Existing traction accumulator charger as shown in Figure 1, is made up of input rectification circuit, pre-charge circuit, filter circuit, high-frequency inverter circuit, secondary rectification circuit, output filter circuit etc.The specified input voltage 3AC400V of charger module (passing through input rectification circuit) and DC750V (not passing through input rectification circuit), nominal output voltage DC806V, rated output power 65kW, can realize by different input interfaces the input of variety classes electric energy.This charger is arranged on engineering truck as single equipment, structurally can be divided into importation, main circuit part and efferent three parts of grading, adopt forced air cooling but mode dispel the heat; Meanwhile, on engineering truck, need corresponding DC/AC device cooperating.
Traditional engineering maintenance vehicle, adopt internal combustion engine to make the traction energy, because power engineering maintenance cart is in natural advantages in aspect such as environmental protection and energy saving, noise, maintenance and useful lifes, along with the development of battery technology, adopt storage battery to become the inevitable of development as the power engineering maintenance cart internal combustion engineering truck of the traction energy.
Traction accumulator charger shown in Fig. 1 mainly contains following several defects:
1, before direct current input pre-charge circuit, lack filter circuit, easily damage because input current fluctuation causes pre-charge resistance;
2, energy flow, to single, has reduced the fault-tolerance of circuit;
3, the existence of half-bridge high-frequency inverter circuit, causes the difficult design of relevant magnetic element;
4, when engineering maintenance vehicle charger is worked, DC/AC equipment co-operation be need coordinate, railway equipment miniaturization and integrated trend do not met.
Summary of the invention
Technical problem to be solved by this invention is, for the deficiencies in the prior art, to provide a kind of engineering truck traction charger, the fault-tolerance of raising circuit.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of engineering truck traction charger, comprise microcomputer control unit, and described microcomputer control unit is connected with copped wave charging circuit, four-quadrant rectification circuit respectively by two isolation drive unit; Described copped wave charging circuit input is connected with direct current input pre-charge circuit; Described copped wave charging circuit output is connected with described four-quadrant rectification circuit input end; Described four-quadrant rectification circuit output end is connected with interchange input pre-charge circuit, and described interchange input pre-charge circuit is connected with AC power; Described direct current input pre-charge circuit is connected with DC power supply; Described chopper circuit is connected with output circuit; The engineering truck ac bus described four-quadrant rectification circuit of access in parallel and described interchange between input pre-charge circuit.
Between described DC power supply and described direct current input pre-charge circuit, be connected to direct current input filter circuit, can avoid because of the input current pre-charge resistance damage causing of fluctuate.
Described four-quadrant rectification circuit and described interchange between input pre-charge circuit are connected to interchange input filter circuit.Interchange input filter circuit can under mode of operation boost AC380V and filtering in storehouse, for four-quadrant rectification; Meanwhile, under the 3rd rail powered operation pattern, can multiplexingly use as AC380V ac filter circuit.
Compared with prior art, the beneficial effect that the present invention has is: circuit of the present invention can work in 2 kinds of powering modes of power supply in the 3rd rail, storehouse, the braking energy of engineering maintenance vehicle can be returned to traction accumulator, and the fault-tolerance of circuit is high; Main circuit is multiplexing, has realized energy in bidirectional flow, has improved the integrated level of system, has greatly reduced the volume and weight of equipment, meanwhile, has improved the maintainability of system; Solve the problem of the magnetic element difficult design that in available circuit, half-bridge high-frequency inverter circuit causes.
Brief description of the drawings
Fig. 1 is existing traction charger electrical structure block diagram;
Fig. 2 is one embodiment of the invention structured flowchart;
Fig. 3 is one embodiment of the invention main circuit schematic diagram.
Embodiment
As shown in Figure 2, one embodiment of the invention comprises microcomputer control unit, and described microcomputer control unit is connected with copped wave charging circuit, four-quadrant rectification circuit respectively by two isolation drive unit; Described copped wave charging circuit input is connected with direct current input pre-charge circuit; Described copped wave charging circuit output is connected with described four-quadrant rectification circuit input end; Described four-quadrant rectification circuit output end is connected with interchange input pre-charge circuit, and described interchange input pre-charge circuit is connected with AC power; Described direct current input pre-charge circuit is connected with DC power supply; Described chopper circuit is connected with output circuit; Engineering truck fan parallel-connection accesses described four-quadrant rectification circuit and described interchange between input pre-charge circuit; Between described DC power supply and described direct current input pre-charge circuit, be connected to direct current input filter circuit; Described four-quadrant rectification circuit and described interchange between input pre-charge circuit are connected to interchange input filter circuit.
As shown in Figure 2, described direct current input filter circuit is LC filter circuit, mainly comprises direct current input inductance L 1, direct current input capacitance C3, can effectively reduce the input pulsation of the 3rd rail power supply, for rear class provides more stable input power.
Described direct current input pre-charge circuit comprises the first direct current precharge contactor KM1 and the second direct current precharge contactor KM2, described the first direct current precharge contactor is connected with the direct current input inductance L 1 of described LC filter circuit, described the second direct current precharge contactor is in parallel with described the first direct current precharge contactor, and described the second direct current precharge contactor is connected with pre-charge resistance R1 with direct current.When charger starts under the 3rd rail powering mode, contactor KM2 adhesive is by pre-charge resistance R1 to Support Capacitor C1, and the charging current of C1 is limited by R1, in the time that on electric capacity, voltage reaches a threshold value, contactor KM1 adhesive, by charging resistor short circuit, completes pre-charge process.
Described copped wave charging circuit comprises Support Capacitor C1 and the copped wave pipe VT7 in parallel with described Support Capacitor, and described copped wave pipe is connected with copped wave diode VT8.Copped wave pipe and copped wave diode are realized buck chopper function, convert bus direct voltage to DC921V output.
Described interchange input filter circuit comprises interchange input filter inductance L 2, the interchange input transformer T1 connecting successively and exchanges input electromagnetic interface filter Z3; Described interchange input filter inductance exchanges input filter capacitor C2 with exchanging to be parallel with between the winding of the former limit of input transformer; Described blower fan FAN is by the circuit breaker Q F1 described electromagnetic interface filter of access in parallel and described interchange between input pre-charge circuit.Interchange input filter circuit can under mode of operation boost 3AC380V and filtering in storehouse, for four-quadrant rectification; Meanwhile, under the 3rd rail powered operation pattern, can multiplexingly use as 3AC380V ac filter circuit.
Described interchange input pre-charge circuit comprises two interchanges input precharge contactor KM3, KM4 in parallel, one of them exchange input tri-contacts of precharge contactor KM4D respectively with exchanges input pre-charge resistance R6～R8 and connects.In storehouse, under mode of operation, when charger starts, exchange input precharge contactor KM4 adhesive, input pre-charge resistance R6～R8 by interchange and carry out precharge, in the time that voltage reaches pre-charge voltage limit value, exchange input precharge contactor KM3 adhesive, exchange input precharge and complete.
The output filter capacitor C4 that described output circuit comprises output inductor L (external) and connects with described output inductor, described output filter capacitor is in parallel with output absorption resistance R2; Between described output inductor one end described copped wave pipe of access in parallel and described copped wave diode; Described output filter capacitor, output absorption resistance are all connected with described DC power supply.Output inductor and output filter capacitor can reduce the galvanic pulsation of output, and output absorption resistance can absorb energy in the time that charger load is cut off.
Four-quadrant rectification circuit is made up of IGBT VT1～VT6, can in storehouse, under power mode, 3AC380V input in storehouse be transformed into DC1500V, as the input of copped wave circuit for charging machine; Meanwhile, under the 3rd rail powered operation pattern, can be multiplexed with ac converter circuit the DC1500V input of the 3rd rail power supply is reverse into 3AC380V, make the function that charger can integrated inverse device.
Isolation drive unit will be converted to IGBT switching signal from the pulse drive signal of microcomputer control unit, the IGBT fault detecting is fed back to microcomputer control unit simultaneously.
Under direct current input service pattern, direct current input is charged to Support Capacitor by after filtering.By copped wave charging circuit output direct current; By four-quadrant rectification circuit, exchange input filter circuit and exchange the multiplexing output 3x380V interchange of input pre-charge circuit.
Exchanging under input service pattern, interchange is inputted by four-quadrant rectification circuit, interchange input filter circuit and is exchanged input pre-charge circuit and on Support Capacitor, produces direct current, produces direct current export as the input of copped wave charging circuit.
By two-way input separately, in a kind of situation of mode of operation fault, another kind of mode of operation still can be used this circuit; Multiplexing by part main circuit of this circuit, the integrated function of inverter, has realized the miniaturization of locomotive equipment.Charger can pass through multiplexing ac input circuit, under the 3rd rail powered operation pattern, in output DC921V, externally exports 3AC380V.
Charger adopts air cooling way, the specified 70kW that is output as, can adopt in the 3rd rail power supply, storehouse power supply as input, under the 3rd rail powering mode, charger one tunnel output DC921V power supply is to storage battery power supply, separately leading up to four-quadrant rectification circuit and ac input division divides main circuit multiplexing, and output 3AC380V powers to AC load; In storehouse, under electric source modes, traction accumulator charger output DC921V accumulators is powered.The external electric interfaces of charger of the present invention is in table 1.
The external electric interfaces of table 1 charger
Claims (9)
1. an engineering truck traction charger, comprises microcomputer control unit, it is characterized in that, described microcomputer control unit is connected with copped wave charging circuit, four-quadrant rectification circuit respectively by two isolation drive unit; Described copped wave charging circuit input is connected with direct current input pre-charge circuit; Described copped wave charging circuit output is connected with described four-quadrant rectification circuit input end; Described four-quadrant rectification circuit output end is connected with interchange input pre-charge circuit, and described interchange input pre-charge circuit is connected with AC power; Described direct current input pre-charge circuit is connected with DC power supply; Described chopper circuit is connected with output circuit; The engineering truck ac bus described four-quadrant rectification circuit of access in parallel and described interchange between input pre-charge circuit.
2. engineering truck traction charger according to claim 1, is characterized in that, between described DC power supply and described direct current input pre-charge circuit, is connected to direct current input filter circuit.
3. engineering truck traction charger according to claim 2, is characterized in that, described four-quadrant rectification circuit and described interchange between input pre-charge circuit are connected to interchange input filter circuit.
4. engineering truck traction charger according to claim 3, is characterized in that, described direct current input filter circuit is LC filter circuit.
5. engineering truck traction charger according to claim 4, it is characterized in that, described direct current input pre-charge circuit comprises the first direct current precharge contactor and the second direct current precharge contactor, described the first direct current precharge contactor is connected with the inductance of described LC filter circuit, described the second direct current precharge contactor is in parallel with described the first direct current precharge contactor, and described the second direct current precharge contactor is connected with pre-charge resistance with direct current.
6. engineering truck traction charger according to claim 5, is characterized in that, described copped wave charging circuit comprises Support Capacitor and the copped wave pipe in parallel with described Support Capacitor, and described copped wave pipe is connected with copped wave diode.
7. engineering truck traction charger according to claim 6, is characterized in that, described interchange input filter circuit comprises interchange input filter inductance, the interchange input transformer connecting successively and exchanges input electromagnetic interface filter; Described interchange input filter inductance is parallel with interchange input filter capacitor with exchanging between the winding of the former limit of input transformer; Described blower fan is by the circuit breaker described electromagnetic interface filter of access in parallel and described interchange between input pre-charge circuit.
8. engineering truck traction charger according to claim 7, it is characterized in that, described interchange input pre-charge circuit comprises two interchange input precharge contactors in parallel, and one of them exchanges input precharge contactor and exchanges the series connection of input pre-charge resistance.
9. engineering truck traction charger according to claim 8, is characterized in that, the output filter capacitor that described output circuit comprises output inductor and connects with described output inductor, and described output filter capacitor is in parallel with output absorption resistance; Between described output inductor one end described copped wave pipe of access in parallel and described copped wave diode; Described output filter capacitor, output absorption resistance are all connected with described DC power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410388100.6A CN104135055B (en) | 2014-08-08 | 2014-08-08 | A kind of engineering truck traction charging set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410388100.6A CN104135055B (en) | 2014-08-08 | 2014-08-08 | A kind of engineering truck traction charging set |
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| CN104135055A true CN104135055A (en) | 2014-11-05 |
| CN104135055B CN104135055B (en) | 2016-06-08 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600783A (en) * | 2014-12-25 | 2015-05-06 | 株洲南车时代电气股份有限公司 | Charger |
| CN105790317A (en) * | 2016-04-29 | 2016-07-20 | 株洲中车时代电气股份有限公司 | Rail vehicle main circuit suitable for power supplying of a plurality of power supplies |
| CN106300570A (en) * | 2015-05-18 | 2017-01-04 | 中车大连电力牵引研发中心有限公司 | The rail vehicle charger system of multi input voltage and rail vehicle |
| CN106452110A (en) * | 2016-11-18 | 2017-02-22 | 广州智光电气股份有限公司 | Power conversion apparatus and microgrid |
| CN107492941A (en) * | 2017-10-16 | 2017-12-19 | 四川航电微能源有限公司 | Charging pile device based on airport ground power supply |
| CN110618324A (en) * | 2019-08-29 | 2019-12-27 | 幸宗国 | High-power battery simulator |
| CN110875609A (en) * | 2018-08-30 | 2020-03-10 | 株洲中车时代电气股份有限公司 | Vehicle-mounted charger and dead load control method thereof |
| CN111313519A (en) * | 2019-12-31 | 2020-06-19 | 中国重汽集团济南动力有限公司 | High-power vehicle-mounted charging integration system and method |
| CN112238763A (en) * | 2020-10-23 | 2021-01-19 | 中车株洲电力机车有限公司 | Pre-charging/charging circuit and control device and control method thereof |
| CN113300579A (en) * | 2020-02-24 | 2021-08-24 | 株洲中车时代电气股份有限公司 | Multisource power supply equipment and system of engineering vehicle |
| CN113489298A (en) * | 2021-08-20 | 2021-10-08 | 青岛鼎信通讯股份有限公司 | Pre-charging circuit applied to alternating current-direct current bidirectional inverter power supply module |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201904639U (en) * | 2010-11-30 | 2011-07-20 | 南车株洲电力机车有限公司 | Charging device in garage of double-source controlled electrical locomotive |
| CN201985600U (en) * | 2011-02-24 | 2011-09-21 | 上海瑞伯德智能系统科技有限公司 | Traction frequency converter circuit with charging function in electric vehicle |
-
2014
- 2014-08-08 CN CN201410388100.6A patent/CN104135055B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201904639U (en) * | 2010-11-30 | 2011-07-20 | 南车株洲电力机车有限公司 | Charging device in garage of double-source controlled electrical locomotive |
| CN201985600U (en) * | 2011-02-24 | 2011-09-21 | 上海瑞伯德智能系统科技有限公司 | Traction frequency converter circuit with charging function in electric vehicle |
Non-Patent Citations (1)
| Title |
|---|
| 李家淦: "镍氢电容电池快速充电系统", 《山东理工大学学报》, vol. 26, no. 2, 31 March 2012 (2012-03-31) * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104600783A (en) * | 2014-12-25 | 2015-05-06 | 株洲南车时代电气股份有限公司 | Charger |
| CN106300570A (en) * | 2015-05-18 | 2017-01-04 | 中车大连电力牵引研发中心有限公司 | The rail vehicle charger system of multi input voltage and rail vehicle |
| CN105790317A (en) * | 2016-04-29 | 2016-07-20 | 株洲中车时代电气股份有限公司 | Rail vehicle main circuit suitable for power supplying of a plurality of power supplies |
| CN106452110A (en) * | 2016-11-18 | 2017-02-22 | 广州智光电气股份有限公司 | Power conversion apparatus and microgrid |
| CN106452110B (en) * | 2016-11-18 | 2019-01-01 | 广州智光电气股份有限公司 | A power conversion device and microgrid |
| CN107492941A (en) * | 2017-10-16 | 2017-12-19 | 四川航电微能源有限公司 | Charging pile device based on airport ground power supply |
| CN110875609B (en) * | 2018-08-30 | 2023-04-14 | 株洲中车时代电气股份有限公司 | Vehicle-mounted charger and dead load control method thereof |
| CN110875609A (en) * | 2018-08-30 | 2020-03-10 | 株洲中车时代电气股份有限公司 | Vehicle-mounted charger and dead load control method thereof |
| CN110618324A (en) * | 2019-08-29 | 2019-12-27 | 幸宗国 | High-power battery simulator |
| CN111313519A (en) * | 2019-12-31 | 2020-06-19 | 中国重汽集团济南动力有限公司 | High-power vehicle-mounted charging integration system and method |
| CN113300579A (en) * | 2020-02-24 | 2021-08-24 | 株洲中车时代电气股份有限公司 | Multisource power supply equipment and system of engineering vehicle |
| CN112238763A (en) * | 2020-10-23 | 2021-01-19 | 中车株洲电力机车有限公司 | Pre-charging/charging circuit and control device and control method thereof |
| CN112238763B (en) * | 2020-10-23 | 2022-05-13 | 中车株洲电力机车有限公司 | Charging circuit and control device and control method thereof |
| CN113489298A (en) * | 2021-08-20 | 2021-10-08 | 青岛鼎信通讯股份有限公司 | Pre-charging circuit applied to alternating current-direct current bidirectional inverter power supply module |
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| Publication number | Publication date |
|---|---|
| CN104135055B (en) | 2016-06-08 |
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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 Patentee before: ZHUZH CSR TIMES ELECTRIC Co.,Ltd. |