CN102882417A - Uninterrupted power supply (UPS) isolation type bidirectional direct-current converter - Google Patents
Uninterrupted power supply (UPS) isolation type bidirectional direct-current converter Download PDFInfo
- Publication number
- CN102882417A CN102882417A CN2012103861840A CN201210386184A CN102882417A CN 102882417 A CN102882417 A CN 102882417A CN 2012103861840 A CN2012103861840 A CN 2012103861840A CN 201210386184 A CN201210386184 A CN 201210386184A CN 102882417 A CN102882417 A CN 102882417A
- Authority
- CN
- China
- Prior art keywords
- switching tube
- push
- ups
- circuit
- isolation type
- Prior art date
- 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.)
- Pending
Links
Images
Abstract
The invention discloses an uninterrupted power supply (UPS) isolation type bidirectional direct-current converter and belongs to the field of UPS. The UPS isolation type bidirectional direct-current converter is characterized by comprising a push-pull circuit, a half-bridge circuit and a transformer, wherein a switch tube is built in the push-pull circuit to control unidirectional connection or disconnection. A low-voltage winding of the transformer is connected onto a backup power source through the push-pull circuit, and a high-voltage winding of the transformer is connected onto a direct-current busbar capacitor through the half-bridge circuit. By connecting the switch tube of the push-pull circuit and turning off the switch tube of the half-bridge circuit, boosting discharging toward the direct-current busbar capacitor is achieved by the backup power source; and by turning off the switch tube of the push-pull circuit and connecting the switch tube of the half-bridge circuit, the backup power source is reduced in voltage and charged by the direct-current busbar capacitor. On the low-voltage side of the transformer, the push-pull circuit works bidirectionally, and additionally the UPS isolation type bidirectional direct-current converter adopts a full-bridge circuit, and is simple in structure and low in cost.
Description
Technical field
The application belongs to the UPS field, relates in particular to UPS isolation type bidirectional DC converter.
Background technology
In the UPS of in the past reserve or online small-power (below the 3KW), DC converter all is that to recommend unidirectional Boost topology be main, this topology is that lower battery (in support power supply) voltage is raised to needed DC bus-bar voltage, and then transfers the inversion input of rear class to.In push-pull circuit in the past, it is the energy one-way transmission, but can't effectively charge to battery conversely, thereby this topology needs to increase external charger, and external charger generally adopts the FLYBACK circuit, cause charge power to be done not quite, charging current is also less than normal, if need larger charging current, with regard to necessary several same chargers in parallel, cost is high, and volume is large, and stability is also bad, therefore, use original DC converter with push-pull circuit, shortcoming is that element is many, and overall cost is high.Because push-pull circuit only is used for direct current is converted to interchange, and be not used as interchange is converted to direct current, if therefore realize the energy transmitted in both directions in the mode that does not connect external charger, just need to all adopt full-bridge circuit in the transformer both sides, perhaps step down side adopts full-bridge circuit and high-pressure side to adopt half-bridge circuit, cause complex structure, cost is high.
Summary of the invention
The application's purpose is to provide simple in structurely, realizes the low UPS isolation type bidirectional DC converter of cost.
The inventor finds, in UPS isolation type bidirectional DC converter, only is used in fact also can be used for the push-pull circuit of the converting direct-current power into alternating-current power of back-up source allowing back-up source accept the AC charging of transformer low voltage winding always.
Under this thinking, provide UPS isolation type bidirectional DC converter, it is characterized in that:
Comprise the push-pull circuit and the half-bridge circuit that are built-in with the unidirectional break-make of switch controlled;
Comprise transformer, its low pressure winding is received back-up source through push-pull circuit, and its high pressure winding is received dc-link capacitance through half-bridge circuit;
Switching tube by the conducting push-pull circuit also turn-offs the switching tube of half-bridge circuit, realizes that back-up source is to the dc-link capacitance discharge of boosting;
By the switching tube of shutoff push-pull circuit and the switching tube of conducting half-bridge circuit, realize that back-up source is charged by the dc-link capacitance step-down.
Push-pull circuit is done two-way use, this just can not only be raised to lower cell voltage required DC bus-bar voltage, transfer again the inversion input of rear class to, conversely, can also pass to back-up source to the energy of high voltage side of transformer, thereby realize the back-up source charging reach the function of energy two-way changing, and the power conversion of both direction be can be same power.In the low-pressure side of transformer, push-pull circuit is done two-way use, need not all adopt full-bridge circuit herein, and is simple in structure, realizes that cost is low.
The switching tube place of push-pull circuit and/or half-bridge circuit can only utilize the parasitic diode of switching tube self to pass through by charging current/discharging current, also can be with the switching tube of backward diode parallel pushpull circuit and/or half-bridge circuit so that charging current/discharging current pass through.
Further, be serially connected with the afterflow inductance to keep electric current steady at high voltage side of transformer.
Description of drawings
Fig. 1 is the circuit diagram of UPS isolation type bidirectional DC converter.
Fig. 2 is the circuit diagram of another UPS isolation type bidirectional DC converter.
Fig. 3 shows the boosted switch cycling state one of Fig. 1.
Fig. 4 shows the boosted switch cycling state two of Fig. 1.
Fig. 5 shows the boosted switch cycling state three of Fig. 1.
Fig. 6 shows the boosted switch cycling state four of Fig. 1.
Fig. 7 shows the step-down switching cycling state one of Fig. 1.
Fig. 8 shows the step-down switching cycling state two of Fig. 1.
Fig. 9 shows the step-down switching cycling state three of Fig. 1.
Figure 10 shows the step-down switching cycling state four of Fig. 1.
Embodiment
UPS isolation type bidirectional DC converter such as Fig. 1.Former limit winding L 1 and the L2 of transformer are the low pressure windings, and it receives the in support battery of power supply through push-pull circuit, and push-pull circuit is built-in with switching tube Q1 and Q2 controls unidirectional break-make; The secondary winding L 3 of transformer is the high pressure winding, and it receives dc-link capacitance C1 and C2 through half-bridge circuit, and half-bridge circuit is built-in with switching tube Q3 and Q4 controls unidirectional break-make.
By in turn switching tube Q1 and the Q2 of conducting push-pull circuit, and turn-off switching tube Q3 and the Q4 of half-bridge circuit, realize that back-up source is to the dc-link capacitance discharge of boosting.At first switching tube Q1 conducting Q2 turn-offs, current direction as shown in Figure 3, electric current flows out from anode, gets back to battery cathode through former limit winding L 1 and switching tube Q1, forms the loop.Because 2 pin of transformer primary side winding L 1 connect anode, Same Name of Ends relation according to Transformer Winding, transformer 2 pin and 6 pin are Same Name of Ends, therefore 6 pin voltages of transformer secondary winding L 3 are anodal, secondary winding L 3 is discharged to dc-link capacitance C2 by parasitic diode D4 and afterflow inductance L.
Then switching tube Q1 turn-offs Q2 and turn-offs, and electric current or 8 pin of afterflow this moment inductance L flow to 7 pin, current direction as shown in Figure 4, secondary winding L 3 passes through parasitic diode D4 and the afterflow inductance L is discharged to dc-link capacitance C2.
Then switching tube Q2 conducting Q1 turn-offs, current direction as shown in Figure 5, electric current flows out from anode, gets back to battery cathode through former limit winding L 2 and switching tube Q2; Because 3 pin of transformer primary side winding L 2 connect anode, Same Name of Ends relation according to Transformer Winding, transformer 3 pin and 5 pin are Same Name of Ends, therefore 5 pin voltages of transformer secondary winding L 3 are anodal, therefore secondary winding L 3 is discharged to dc-link capacitance C1 by afterflow inductance L and parasitic diode D3.
Then switching tube Q1 turn-offs Q2 and turn-offs, and the electric current on the afterflow this moment inductance L still is that 7 pin flow to 8 pin, current direction as shown in Figure 6, secondary winding L 3 is discharged to dc-link capacitance C1 by afterflow inductance L and parasitic diode D3.
Above for anodal to the part of boosting, back-up source consists of a complete switch periods to the dc-link capacitance discharge of boosting.Hereinafter be the step-down part, back-up source is charged by the dc-link capacitance step-down.
By in turn switching tube Q3 and the Q4 of conducting half-bridge circuit, and turn-off switching tube Q1 and the Q2 of push-pull circuit, realize that back-up source is charged by the dc-link capacitance step-down.At first switching tube Q3 conducting Q4 turn-offs, current direction as shown in Figure 7, electric current flows back to the negative pole of dc-link capacitance C1 through switching tube Q3, afterflow inductance L and secondary winding L 3 from the positive pole of dc-link capacitance C1, form the loop, and this moment, dc-link capacitance C1 released energy.Because 5 pin voltages of transformer secondary winding L 3 are anodal, Same Name of Ends relation according to Transformer Winding, transformer 5 pin and 3 pin are Same Name of Ends, therefore 3 pin of transformer primary side winding L 2 are positive polarity, so the parasitic diode of transformer primary side winding L 2 by switching tube Q2 inside charges to battery.
Then switching tube Q3 turn-offs the Q4 shutoff, because the afterflow inductance L sense of current is constant, current direction as shown in Figure 8, electric current still from the afterflow inductance L through secondary winding L 3, form the loop together with dc-link capacitance C2 and parasitic diode D4, thereby allow dc-link capacitance C2 makeup energy.
Then switching tube Q4 conducting Q3 turn-offs, current direction as shown in Figure 9, electric current is flowed back to the negative pole of dc-link capacitance C2 through afterflow inductance L, transformer secondary winding L 3 and switching tube Q4 by the positive pole of dc-link capacitance C2, form the loop, and this moment, dc-link capacitance C2 released energy.Because 6 pin voltages of transformer secondary winding L 3 are anodal, Same Name of Ends relation according to Transformer Winding, transformer 6 pin and 2 pin are Same Name of Ends, therefore 2 pin of transformer primary side winding L 1 are positive polarity, so the parasitic diode of transformer primary side winding L 1 by switching tube Q1 inside charges to battery.
Then switching tube Q4 turn-offs the Q3 shutoff, because the afterflow inductance L sense of current is constant, current direction as shown in figure 10, electric current still from the afterflow inductance L through secondary winding L 3, form the loop together with dc-link capacitance C1 and parasitic diode D3, realize simultaneously the makeup energy to dc-link capacitance C1.So far consist of the complete switch periods that back-up source is charged by the dc-link capacitance step-down.
For the switching tube of push-pull circuit and/or half-bridge circuit, if the parasitic diode of switching tube inside is bad by the effect that charging current/discharging current passes through, then can be with backward diode paralleling switch pipe so that charging current/discharging current pass through.For example shown in Figure 2, the switching tube Q1 of backward diode D1 parallel pushpull circuit, the switching tube Q2 of backward diode D2 parallel pushpull circuit.
Claims (6)
1.UPS the isolation type bidirectional DC converter is characterized in that:
Comprise the push-pull circuit and the half-bridge circuit that are built-in with the unidirectional break-make of switch controlled;
Comprise transformer, its low pressure winding is received back-up source through push-pull circuit, and its high pressure winding is received dc-link capacitance through half-bridge circuit;
Switching tube by the conducting push-pull circuit also turn-offs the switching tube of half-bridge circuit, realizes that back-up source is to the dc-link capacitance discharge of boosting;
By the switching tube of shutoff push-pull circuit and the switching tube of conducting half-bridge circuit, realize that back-up source is charged by the dc-link capacitance step-down.
2. UPS isolation type bidirectional DC converter according to claim 1 is characterized in that, the switching tube place of push-pull circuit only utilizes the parasitic diode of switching tube self to pass through by charging current.
3. UPS isolation type bidirectional DC converter according to claim 1 is characterized in that, have backward diode parallel pushpull circuit switching tube so that charging current pass through.
4. UPS isolation type bidirectional DC converter according to claim 1 is characterized in that, the switching tube place of half-bridge circuit only utilizes the parasitic diode of switching tube self to pass through by charging current.
5. UPS isolation type bidirectional DC converter according to claim 1 is characterized in that, have backward diode half-bridge circuit in parallel switching tube so that discharging current pass through.
6. UPS isolation type bidirectional DC converter according to claim 1 is characterized in that, is serially connected with the afterflow inductance at high voltage side of transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103861840A CN102882417A (en) | 2012-10-12 | 2012-10-12 | Uninterrupted power supply (UPS) isolation type bidirectional direct-current converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103861840A CN102882417A (en) | 2012-10-12 | 2012-10-12 | Uninterrupted power supply (UPS) isolation type bidirectional direct-current converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102882417A true CN102882417A (en) | 2013-01-16 |
Family
ID=47483621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103861840A Pending CN102882417A (en) | 2012-10-12 | 2012-10-12 | Uninterrupted power supply (UPS) isolation type bidirectional direct-current converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102882417A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337505A (en) * | 2015-11-12 | 2016-02-17 | 深圳市泰昂能源科技股份有限公司 | DC/DC conversion circuit and power supply device |
| CN105958829A (en) * | 2016-05-25 | 2016-09-21 | 重庆大学 | Isolation type bidirectional buck-boost converter and work method |
| CN106877679A (en) * | 2017-04-17 | 2017-06-20 | 重庆大学 | Isolation type bidirectional buck-boost converter and method of work |
| CN110401348A (en) * | 2018-04-25 | 2019-11-01 | 维谛公司 | A kind of two-way resonance DC-DC transfer circuit and uninterruptible power supply |
| CN110622405B (en) * | 2017-05-19 | 2021-07-06 | 三菱电机株式会社 | Power conversion device |
| CN113285608A (en) * | 2021-05-25 | 2021-08-20 | 国网黑龙江省电力有限公司电力科学研究院 | Topological structure of bidirectional DC-DC converter for UPS |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1545194A (en) * | 2003-11-19 | 2004-11-10 | 南京航空航天大学 | Cascading bidirectional DC-DC converter |
| CN1551471A (en) * | 2003-05-09 | 2004-12-01 | ������������ʽ���� | Power converter |
| US20050024901A1 (en) * | 2003-07-30 | 2005-02-03 | Delta Electronics Inc. | Primary side ZVS push-pull converter having relatively less losses |
| CN102291035A (en) * | 2011-07-22 | 2011-12-21 | 上海交通大学 | Alternating-current push-pull inversion-matrix rectification step-down circuit |
| US20110317452A1 (en) * | 2010-06-25 | 2011-12-29 | Gueorgui Iordanov Anguelov | Bi-directional power converter with regulated output and soft switching |
| CN202818147U (en) * | 2012-10-12 | 2013-03-20 | 广东易事特电源股份有限公司 | UPS isolated bidirectional direct-current converter |
-
2012
- 2012-10-12 CN CN2012103861840A patent/CN102882417A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1551471A (en) * | 2003-05-09 | 2004-12-01 | ������������ʽ���� | Power converter |
| US20050024901A1 (en) * | 2003-07-30 | 2005-02-03 | Delta Electronics Inc. | Primary side ZVS push-pull converter having relatively less losses |
| CN1545194A (en) * | 2003-11-19 | 2004-11-10 | 南京航空航天大学 | Cascading bidirectional DC-DC converter |
| US20110317452A1 (en) * | 2010-06-25 | 2011-12-29 | Gueorgui Iordanov Anguelov | Bi-directional power converter with regulated output and soft switching |
| CN102291035A (en) * | 2011-07-22 | 2011-12-21 | 上海交通大学 | Alternating-current push-pull inversion-matrix rectification step-down circuit |
| CN202818147U (en) * | 2012-10-12 | 2013-03-20 | 广东易事特电源股份有限公司 | UPS isolated bidirectional direct-current converter |
Non-Patent Citations (1)
| Title |
|---|
| 马兰等: "电流型推挽全桥双向变换器的研究", 《电力电子技术》, vol. 42, no. 1, 31 January 2008 (2008-01-31) * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337505A (en) * | 2015-11-12 | 2016-02-17 | 深圳市泰昂能源科技股份有限公司 | DC/DC conversion circuit and power supply device |
| CN105958829A (en) * | 2016-05-25 | 2016-09-21 | 重庆大学 | Isolation type bidirectional buck-boost converter and work method |
| CN105958829B (en) * | 2016-05-25 | 2019-05-10 | 重庆大学 | Isolation type bidirectional buck-boost converter and working method |
| CN106877679A (en) * | 2017-04-17 | 2017-06-20 | 重庆大学 | Isolation type bidirectional buck-boost converter and method of work |
| CN106877679B (en) * | 2017-04-17 | 2019-03-12 | 重庆大学 | Isolation type bidirectional buck-boost converter and working method |
| CN110622405B (en) * | 2017-05-19 | 2021-07-06 | 三菱电机株式会社 | Power conversion device |
| CN110401348A (en) * | 2018-04-25 | 2019-11-01 | 维谛公司 | A kind of two-way resonance DC-DC transfer circuit and uninterruptible power supply |
| CN113285608A (en) * | 2021-05-25 | 2021-08-20 | 国网黑龙江省电力有限公司电力科学研究院 | Topological structure of bidirectional DC-DC converter for UPS |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101976871B (en) | UPS (Uninterrupted Power Supply) power supply control circuit and UPS power supply | |
| Chen et al. | A cascaded high step-up DC–DC converter with single switch for microsource applications | |
| WO2021232785A1 (en) | Three-bridge arm topology apparatus, control method, and uninterrupted power supply system | |
| US8698354B2 (en) | System and method for bidirectional DC-AC power conversion | |
| CN103187876B (en) | A kind of DC/DC circuit of uninterrupted power source | |
| US9413271B2 (en) | Power conversion system with a DC to DC boost converter | |
| WO2018157838A1 (en) | Combined dc-dc converter for use in hybrid power system | |
| CN102882417A (en) | Uninterrupted power supply (UPS) isolation type bidirectional direct-current converter | |
| KR20120007224A (en) | Energy storage system | |
| CN101789690B (en) | UPS preceding stage electric volt increase station | |
| WO2021232749A1 (en) | Three-bridge-arm topological device and uninterrupted power supply system | |
| Yu et al. | Hierarchical power management for DC microgrid in islanding mode and Solid State transformer enabled mode | |
| CN102868198A (en) | Uninterrupted power supply (UPS) reserve power supply boosting and charging reuse circuit | |
| WO2014079268A1 (en) | Bi-directional storing inverter used in grid connected power system | |
| CN104319798B (en) | A kind of bidirectional DC/DC converter and light-preserved system | |
| CN106716775A (en) | Uninterruptible power supply system with precharge converter | |
| CN112350607A (en) | Three-phase power supply device with bidirectional power conversion | |
| Kanaparthi et al. | A review on multi-port bidirectional isolated and non-isolated DC-DC converters for renewable applications | |
| CN202818147U (en) | UPS isolated bidirectional direct-current converter | |
| CN202840617U (en) | Uninterrupted power supply (UPS) reserve power supply boosting and charging multiplex circuit | |
| CN103208925B (en) | Isolated direct current-direct current (DC-DC) converter topological circuit | |
| CN201947182U (en) | Bi-directional DC/DC (direct current to direct current) power supply | |
| CN101814762B (en) | UPS power supply | |
| CN110932572B (en) | Direct current power supply circuit and system | |
| TWI575860B (en) | Boost converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130116 |