CN202353270U - Power supply circuit for electric vehicle charging equipment - Google Patents
Power supply circuit for electric vehicle charging equipment Download PDFInfo
- Publication number
- CN202353270U CN202353270U CN201120520229XU CN201120520229U CN202353270U CN 202353270 U CN202353270 U CN 202353270U CN 201120520229X U CN201120520229X U CN 201120520229XU CN 201120520229 U CN201120520229 U CN 201120520229U CN 202353270 U CN202353270 U CN 202353270U
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- China
- Prior art keywords
- phase
- power supply
- charging device
- shifting transformer
- electric motor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The utility model discloses a power supply circuit for electric vehicle charging equipment. The power supply circuit comprises the electric vehicle charging equipment and a phase-shifting transformer. A primary winding of the phase-shifting transformer is connected with a three-phase power grid, and a secondary winding of the phase-shifting transformer comprises N groups of three-phase output ends. The electric vehicle charging equipment comprises N charging units of which each is connected with each group of three-phase output ends of the phase-shifting transformer. The N groups of three-phase output ends are staggered in phase with the phase staggering angle alpha of 60 degrees/N. A voltage phase-shifting link is added before each charging unit, so that the phases of alternating current voltages input by each charging unit are different, and rectified ripple currents generated by each charging unit are staggered in phase. Therefore, the rectified ripple number of a power grid end in each period is equivalently increased, and the effect of smoothing waveforms to reduce input harmonics on a power grid side is achieved.
Description
[technical field]
The utility model relates to the electric motor car charging device, relates in particular to a kind of electric motor car charging device power supply circuits.
[background technology]
The electric motor car charging device is owing to be non-linear power consumption equipment, and capacity is bigger, can produce bigger mains by harmonics usually, and electrical network is worked the mischief.Need suppress.What application was more at present is the method for APFC.But this method circuit structure is complicated with control, is interfered easily, when using, receives the restriction of power electronic element rated voltage, electric current again.Poor reliability, cost is high.Another kind is to utilize passive filtration unit (LC filter), and shortcoming is that filter effect is poor, is easy to generate resonance.
[summary of the invention]
The technical problem that the utility model will solve provides a kind of electric motor car charging device power supply circuits less to harmonic pollution in electric power net.
In order to solve the problems of the technologies described above; The technical scheme that the utility model adopts is that a kind of electric motor car charging device power supply circuits comprise electric motor car charging device and phase shifting transformer; The former limit winding of said phase shifting transformer connects three phase network, and phase shifting transformer secondary winding comprises N group three-phase output end; Described electric motor car charging device comprises N charhing unit, and every group of three-phase output end of phase shifting transformer connects 1 charhing unit; Each is organized three-phase output end and on phase place, staggers misphase angle α=60 °/N.
Above-described electric motor car charging device power supply circuits, described charhing unit is a converter unit.
Above-described electric motor car charging device power supply circuits, described charhing unit are charging device groups independently.
The utility model electric motor car charging device power supply circuits add voltage phase shift link before each charhing unit, make the alternating voltage phase place of each charhing unit input different, and the rectification pulsating current that each charhing unit produces will stagger on phase place.So equivalence has increased the rectification pulse number of electrical network end in each cycle.Reach the effect that smooth waveform reduces the grid side input harmonics.
[description of drawings]
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
Fig. 1 is the theory diagram of the utility model electric motor car charging device power supply circuits embodiment 1.
Fig. 2 is the theory diagram of the utility model electric motor car charging device power supply circuits embodiment 2.
[embodiment]
The principle of the utility model electric motor car charging device power supply circuits embodiment 1 is as shown in Figure 1; The large capacity electric vehicle charging device is to be made up of a plurality of converter units; Before each converter unit, add voltage phase shift link; Make the alternating current phases of each converter unit input different, the rectification pulsating current that each converter unit produces will stagger on phase place.So just increased the rectification pulse number of complete machine in each cycle.Reach the effect that smooth waveform reduces the grid side input harmonics.α=60 °/N wherein, N is for inserting the quantity of converter unit.Can realize by single phase shifting transformer or a plurality of phase shifting transformer according to the different voltage phase shifts of place capacity.
The principle of the utility model electric motor car charging device power supply circuits embodiment 2 is as shown in Figure 2, and the electric motor car charging device in parking lot is for to be made up of a plurality of charging device groups.Before each electric motor car charging device group, add voltage phase shift link, make the alternating voltage phase place of each equipment group input different, the rectification pulsating current that each equipment group produces will stagger on phase place.So just equivalence has increased the rectification pulse number of whole parking lot electrical network end in each cycle.Reach the effect that smooth waveform reduces the grid side input harmonics.Different voltage phase shifts can adopt single phase shifting transformer or a plurality of phase shifting transformer to realize according to place capacity.α=60 °/N wherein, N is for inserting the quantity of charging device group.
Claims (3)
1. electric motor car charging device power supply circuits comprise the electric motor car charging device, it is characterized in that, comprise phase shifting transformer, and the former limit winding of said phase shifting transformer connects three phase network, and phase shifting transformer secondary winding comprises N group three-phase output end; Described electric motor car charging device comprises N charhing unit, and every group of three-phase output end of phase shifting transformer connects 1 charhing unit; Each is organized three-phase output end and on phase place, staggers misphase angle α=60 °/N.
2. electric motor car charging device power supply circuits according to claim 1 is characterized in that described charhing unit is a converter unit.
3. electric motor car charging device power supply circuits according to claim 1 is characterized in that, described charhing unit is a charging device group independently.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120520229XU CN202353270U (en) | 2011-12-14 | 2011-12-14 | Power supply circuit for electric vehicle charging equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120520229XU CN202353270U (en) | 2011-12-14 | 2011-12-14 | Power supply circuit for electric vehicle charging equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202353270U true CN202353270U (en) | 2012-07-25 |
Family
ID=46542234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120520229XU Expired - Fee Related CN202353270U (en) | 2011-12-14 | 2011-12-14 | Power supply circuit for electric vehicle charging equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202353270U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104518536A (en) * | 2013-09-29 | 2015-04-15 | 国际商业机器公司 | Charging system, charging control device and charging method |
-
2011
- 2011-12-14 CN CN201120520229XU patent/CN202353270U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104518536A (en) * | 2013-09-29 | 2015-04-15 | 国际商业机器公司 | Charging system, charging control device and charging method |
| US9620980B2 (en) | 2013-09-29 | 2017-04-11 | Globalfoundries Inc. | Charging system, charging control device and charging method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20171214 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |