CN104269910A - Charging device - Google Patents
Charging device Download PDFInfo
- Publication number
- CN104269910A CN104269910A CN201410445940.1A CN201410445940A CN104269910A CN 104269910 A CN104269910 A CN 104269910A CN 201410445940 A CN201410445940 A CN 201410445940A CN 104269910 A CN104269910 A CN 104269910A
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- Prior art keywords
- charging device
- circuit
- rectification
- charging
- shifting transformer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
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- H02J7/022—
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a charging device and belongs to the technical field of electric power. The charging device solves the technical problem that electric energy output by an existing charging device is low in quality. The charging device is used for charging an energy storage element. The charging device comprises a phase-shifting transformer and one or more charging units. A primary winding of the phase-shifting transformer is connected with a power grid. A secondary winding of the phase-shifting transformer is connected with the charging unit. The charging unit comprises a rectifying unit circuit. The rectifying unit circuit is used for rectifying currents output by the secondary winding of the phase-shifting transformer into direct currents. The rectifying unit circuit and the phase-shifting transformer achieve multi-pulse-wave rectification. The output end of the charging unit outputs the direct currents matched with the energy storage element. The charging device can be used for charging high-power energy storage elements applied to urban railway systems and other occasions.
Description
Technical field
The present invention relates to technical field of electric power, specifically, relate to a kind of charging device.
Background technology
Along with the development of urban track traffic, large power energy storage power elements mode is more and more applied to Rail Transit System.Compared to the mode of traditional overhead wire, the fail safe utilizing large power energy storage element to be power supply of urban orbit traffic is higher, and can also reclaim braking energy voluntarily, reduces the loss of electric energy.
At present, for the charging device charged for large power energy storage element, usually transformer is first utilized to carry out step-down to line voltage, be direct current by diode group by AC rectification again, then through the direct current that copped wave output and large power energy storage element match, to be embodied as the charging of large power energy storage element.But existing charging device is subject to the impact of the voltage of grid side, current harmonics very large, causes the technical problem that the quality of exported electric energy is lower.
Summary of the invention
The object of the present invention is to provide a kind of charging device, with the technical problem that the quality solving the electric energy that existing charging device exports is lower.
The invention provides a kind of charging device, for being energy-storage travelling wave tube charging;
Described charging device comprises phase shifting transformer and one or more charhing unit;
The former limit winding switching electrical network of described phase shifting transformer, vice-side winding connects described charhing unit;
Described charhing unit comprises rectification unit circuit, and the AC rectification that described rectification unit circuit is used for the vice-side winding of described phase shifting transformer to export is direct current, and described rectification unit circuit and described phase shifting transformer form multi-pulse rectification;
The output of described charhing unit exports the direct current mated with described energy-storage travelling wave tube.
Preferably, also comprising DC-DC converter in described charhing unit, is the direct current mated with described energy-storage travelling wave tube for the DC power conversion exported by described rectification unit circuit.
Further, the intermediate dc element circuit be connected between described rectification unit circuit and described DC-DC converter is also comprised in described charhing unit;
Described rectification unit circuit comprises precharge loop and diode rectification group.
Preferably, described precharge loop comprises the vice-side winding and the short circuit circuit breaker between described diode rectification group, the pre-charge resistance in parallel with described short circuit circuit breaker that are connected to described phase shifting transformer, and the charging contactor of connecting with described pre-charge resistance.
Preferably, described intermediate dc element circuit comprises Support Capacitor, and the fixing discharge resistance in parallel with described Support Capacitor.
Further, described intermediate dc element circuit also comprises voltage sensor and current sensor.
Preferably, described DC-DC converter comprises stacked buck-booster circuit.
Further, the direct current reactor be connected between described DC-DC converter and described energy-storage travelling wave tube is also comprised in described charhing unit.
Preferably, also comprise the output be connected between described direct current reactor and described energy-storage travelling wave tube in described charhing unit and isolate contactor.
Preferably, this charging device also comprises control unit, for controlling described precharge loop.
Present invention offers following beneficial effect: charging device provided by the invention, phase shifting transformer is adopted to carry out step-down to line voltage, the phase place mutual dislocation that phase shifting transformer is respectively exported mutually, coordinate the rectification unit circuit in charhing unit again, realize many pulse waves (6 pulse waves, 12 pulse waves etc.) rectification, finally export by the output of charhing unit the direct current mated with energy-storage travelling wave tube.Therefore, charging device provided by the invention achieves the multi-pulse rectification to line voltage, thus decreases the impact of grid side voltage, current harmonics, improves the quality of the electric energy that charging device exports.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in specification, claims and accompanying drawing and obtain.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, accompanying drawing required in describing is done simple introduction below to embodiment:
Fig. 1 is the schematic diagram of the charging device that the embodiment of the present invention one provides;
Fig. 2 is the circuit diagram of rectification module in the charging device that provides of the embodiment of the present invention one;
Fig. 3 is the circuit diagram of the charging device that the embodiment of the present invention one provides.
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how application technology means solve technical problem whereby, and the implementation procedure reaching technique effect can fully understand and implement according to this.It should be noted that, only otherwise form conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other, and the technical scheme formed is all within protection scope of the present invention.
embodiment one:
A kind of charging device that the embodiment of the present invention provides, can be used for for the large power energy storage element charging in the scenes such as urban track traffic.
As shown in Figure 1, Figure 2 and Figure 3, the charging device that the embodiment of the present invention provides comprises phase shifting transformer 1 and one or more charhing unit 2, is described in the present embodiment for a charhing unit 2.
The former limit winding switching electrical network of phase shifting transformer 1, vice-side winding connects charhing unit 2.In the present embodiment, phase shifting transformer 1 has two vice-side winding, and is respectively star winding and delta windings, makes the phase place mutual dislocation certain angle of vice-side winding output voltage.
Charhing unit 2 comprises rectification unit circuit 21 and DC-DC converter (DC/DC converter) 22.Rectification unit circuit 21 is direct current for the AC rectification exported by the vice-side winding of phase shifting transformer 1, and rectification unit circuit 21 and phase shifting transformer 1 form multi-pulse rectification.DC/DC converter 22 specifically can comprise stacked buck-boosting (BUCK-BOOST) circuit, the DC power conversion exported by rectification unit circuit 21 by the mode of buck chopper is the direct current mated with energy-storage travelling wave tube, enables the output of charhing unit 2 export the direct current mated with energy-storage travelling wave tube.
As a preferred version, also comprise the intermediate dc element circuit 23 be connected between rectification unit circuit 21 and DC-DC converter in charhing unit 2, mainly comprise Support Capacitor C, and the fixing discharge resistance R in parallel with Support Capacitor C.
Rectification unit circuit 21 comprises precharge loop 211 and diode rectification group 212.Wherein, precharge loop 211 comprises the vice-side winding and the short circuit circuit breaker Q F between diode rectification group 212, the pre-charge resistance R0 in parallel with short circuit circuit breaker Q F that are connected to phase shifting transformer 1, and the charging contactor KM connected with pre-charge resistance R0.
In the present embodiment, two vice-side winding of phase shifting transformer 1 and rectification unit circuit 21 form 12 pulse wave rectifier modules, its course of work is: first closed charging contactor KM, electric current is first through pre-charge resistance R0 current limliting, again through the three-phase bridge circuit rectification of diode rectification group formation, charge to the support capacitor C in intermediate dc element circuit 23, set up initial intermediate voltage value.When the voltage of middle direct current component circuit 23 reaches set point (can according to the predetermined value needing to arrange Support Capacitor C of energy-storage travelling wave tube), closed short circuit circuit breaker Q F, can carry out 12 pulse wave rectifiers.In other embodiments, the quantity of rectification unit circuit 21 can also be increased, to realize 24 pulse wave rectifiers, or more pulse wave rectifier.Therefore, the charging device that the embodiment of the present invention provides achieves the multi-pulse rectification to line voltage, thus decreases the impact of grid side voltage, current harmonics, improves the quality of the electric energy that charging device exports.
In addition, in the present embodiment, only pre-charge resistance R0 is provided with, to reduce the cost of charging device at first vice-side winding place of phase shifting transformer 1.
In practical structures, Support Capacitor C in intermediate dc element circuit 23 can integrate with DC/DC converter 22.In addition, the effect fixing discharge resistance R in intermediate dc element circuit 23 is, after charging device quits work, by the charge discharge of surplus in Support Capacitor C to safe voltage.
In intermediate dc element circuit 23; voltage sensor and current sensor (not shown) can also be set; be respectively used to detect the magnitude of voltage in intermediate dc element circuit 23 and current value, so that carry out control and protection to the fail safe of charging device.
In the present embodiment, DC/DC converter 22 is made up of stacked buck-booster circuit.Such as, the heavy buck-boost circuit of total A in DC/DC converter 22, then often weigh pulse width modulation (the Pulse Width Modulation of buck-boost circuit, be called for short PWM) phase place mutual dislocation 1/A cycle successively of driving pulse, to improve quality and the redundancy of the electric energy of charging device output.
Preferably, in DC/DC converter 22, between each heavy buck-boost circuit and energy-storage travelling wave tube, be all provided with a direct current reactor, form filter unit 24.All direct current reactors are shorted together by output, to reduce the ripple of output voltage and output current.
Further, the output be connected between filter unit 24 and energy-storage travelling wave tube can also be comprised in charhing unit 2 and isolate contactor 25, for when charging device breaks down, charging device and energy-storage travelling wave tube be isolated.
Also comprise control unit 3 in the charging device that the present embodiment provides, be mainly used in the switch controlling precharge loop in rectification unit circuit 21.In addition; control unit can also be used for phase place and the duty ratio of the PWM driving pulse of often heavy buck-boost circuit in control DC/DC converter 22; and the magnitude of voltage of the part such as monitoring intermediate dc element circuit 23 and current value, and provide protection for whole charging device.
It should be noted that in other embodiments, also can adopt the mode of multiple charhing unit parallel connection.Such as, in charging device, the heavy charhing unit of total N is in parallel, and the DC/DC converter in each charhing unit includes the heavy buck-boost circuit of A, then often weigh phase place mutual dislocation 1/AN the cycle successively of the PWM driving pulse of buck-boost circuit.Certainly, when adopting multiple charhing unit in parallel, the quantity of phase shifting transformer can also be increased accordingly.
embodiment two:
The charging device that the present embodiment provides is substantially identical with embodiment one, comprises phase shifting transformer and charhing unit.Its difference is, in the present embodiment, the rectification unit circuit in charhing unit is pwm circuit, phase shifting transformer is utilized to match with pwm circuit, carry out four-quadrant impulse commutation, thus reduce the impact of grid side voltage, current harmonics, improve the quality of the electric energy that charging device exports.Further, can also by the pulsewidth of control PWM, the galvanic voltage exported after regulating rectification, to match with energy-storage travelling wave tube.
In addition, in the present embodiment, also can DC/DC converter be set in charhing unit, the galvanic voltage exported after regulating rectification by DC/DC converter, thus the complexity of pwm circuit control can be reduced to a certain extent.
Although execution mode disclosed in this invention is as above, the execution mode that described content just adopts for the ease of understanding the present invention, and be not used to limit the present invention.Technical staff in any the technical field of the invention; under the prerequisite not departing from spirit and scope disclosed in this invention; any amendment and change can be done what implement in form and in details; but scope of patent protection of the present invention, the scope that still must define with appending claims is as the criterion.
Claims (10)
1. a charging device, is characterized in that, described charging device is used for for energy-storage travelling wave tube charging;
Described charging device comprises phase shifting transformer and one or more charhing unit;
The former limit winding switching electrical network of described phase shifting transformer, vice-side winding connects described charhing unit;
Described charhing unit comprises rectification unit circuit, and the AC rectification that described rectification unit circuit is used for the vice-side winding of described phase shifting transformer to export is direct current, and described rectification unit circuit and described phase shifting transformer form multi-pulse rectification;
The output of described charhing unit exports the direct current mated with described energy-storage travelling wave tube.
2. charging device as claimed in claim 1, is characterized in that, also comprise DC-DC converter in described charhing unit, is the direct current mated with described energy-storage travelling wave tube for the DC power conversion exported by described rectification unit circuit.
3. charging device as claimed in claim 2, is characterized in that, also comprise the intermediate dc element circuit be connected between described rectification unit circuit and described DC-DC converter in described charhing unit;
Described rectification unit circuit comprises precharge loop and diode rectification group.
4. charging device as claimed in claim 3, it is characterized in that, described precharge loop comprises the vice-side winding and the short circuit circuit breaker between described diode rectification group, the pre-charge resistance in parallel with described short circuit circuit breaker that are connected to described phase shifting transformer, and the charging contactor of connecting with described pre-charge resistance.
5. the charging device as described in claim 3 or 4, is characterized in that, described intermediate dc element circuit comprises Support Capacitor, and the fixing discharge resistance in parallel with described Support Capacitor.
6. charging device as claimed in claim 5, it is characterized in that, described intermediate dc element circuit also comprises voltage sensor and current sensor.
7. the charging device as described in any one of claim 2 to 6, is characterized in that, described DC-DC converter comprises stacked buck-booster circuit.
8. the charging device as described in any one of claim 2 to 7, is characterized in that, also comprises the direct current reactor be connected between described DC-DC converter and described energy-storage travelling wave tube in described charhing unit.
9. charging device as claimed in claim 8, is characterized in that, also comprise the output be connected between described direct current reactor and described energy-storage travelling wave tube and isolate contactor in described charhing unit.
10. the charging device as described in any one of claim 3 to 9, is characterized in that, also comprises control unit, for controlling described precharge loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410445940.1A CN104269910A (en) | 2014-09-03 | 2014-09-03 | Charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410445940.1A CN104269910A (en) | 2014-09-03 | 2014-09-03 | Charging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104269910A true CN104269910A (en) | 2015-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410445940.1A Pending CN104269910A (en) | 2014-09-03 | 2014-09-03 | Charging device |
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| Country | Link |
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| CN (1) | CN104269910A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108039763A (en) * | 2017-12-29 | 2018-05-15 | 上海瑞伯德智能系统股份有限公司 | A kind of high power DC charging circuit |
| CN109639159A (en) * | 2018-12-18 | 2019-04-16 | 辽宁恒顺新能源科技有限公司 | High-voltage rectifying system |
| CN113725984A (en) * | 2021-07-27 | 2021-11-30 | 华为数字能源技术有限公司 | Multi-pulse-wave rectifying circuit and charging device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6025697A (en) * | 1997-04-29 | 2000-02-15 | Sagem S.A. | Process for charging a battery and battery charger to achieve the process |
| CN203574421U (en) * | 2013-11-28 | 2014-04-30 | 中国船舶重工集团公司第七一二研究所 | Common direct current bus charging and discharging system |
| CN203800679U (en) * | 2013-11-14 | 2014-08-27 | 北京先行电气有限公司 | Large-power tramcar charging device |
-
2014
- 2014-09-03 CN CN201410445940.1A patent/CN104269910A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6025697A (en) * | 1997-04-29 | 2000-02-15 | Sagem S.A. | Process for charging a battery and battery charger to achieve the process |
| CN203800679U (en) * | 2013-11-14 | 2014-08-27 | 北京先行电气有限公司 | Large-power tramcar charging device |
| CN203574421U (en) * | 2013-11-28 | 2014-04-30 | 中国船舶重工集团公司第七一二研究所 | Common direct current bus charging and discharging system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108039763A (en) * | 2017-12-29 | 2018-05-15 | 上海瑞伯德智能系统股份有限公司 | A kind of high power DC charging circuit |
| CN109639159A (en) * | 2018-12-18 | 2019-04-16 | 辽宁恒顺新能源科技有限公司 | High-voltage rectifying system |
| CN109639159B (en) * | 2018-12-18 | 2024-04-02 | 辽宁恒顺新能源科技有限公司 | High-voltage rectifying system |
| CN113725984A (en) * | 2021-07-27 | 2021-11-30 | 华为数字能源技术有限公司 | Multi-pulse-wave rectifying circuit and charging device |
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Application publication date: 20150107 |
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