CN207719888U - A kind of uninterruptible power supply converter circuit - Google Patents
A kind of uninterruptible power supply converter circuit Download PDFInfo
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- CN207719888U CN207719888U CN201721675853.0U CN201721675853U CN207719888U CN 207719888 U CN207719888 U CN 207719888U CN 201721675853 U CN201721675853 U CN 201721675853U CN 207719888 U CN207719888 U CN 207719888U
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- modules
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- power supply
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Abstract
The utility model discloses a kind of uninterruptible power supply converter circuits, the circuit includes the AC/DC modules being electrically connected with input AC, AC/DC modules one-way conduction is to DC bus module, DC bus module bidirectional conduction is to DC/DC modules, DC/DC modules bidirectional conduction is to BAT modules, BAT modules one-way conduction to AC/DC modules.It solves when rectifier fault occurs in UPS, it switches to DC patterns to power for successive load, improves the reliability of UPS, while AC patterns and discharger power shared under DC patterns can be shared, so that AC patterns and the circuit compatibility shared under DC patterns are more preferable, design cost is reduced.
Description
Technical field
The utility model belongs to power technique fields, is related to a kind of uninterruptible power supply converter circuit.
Background technology
Mostly use battery mode (DC patterns) circuit and utility mode (AC patterns) circuit total in existing ups system
The cost of entire ups system is reduced with the scheme of rectifier, charger uses additional independent circuits to charge for battery.UPS systems
Charger operation charges for battery under AC patterns of uniting, and charger is in idle state under DC patterns；But when rectifier occurs in UPS
When failure, i.e., when circuit devcie before dc-link capacitance breaks down, due to AC patterns and DC mode circuits it is shared cause be
It is load supplying that system, which can not switch to battery,；And lead to AC moulds when circuit under AC patterns and larger circuit differences under DC patterns
The complex circuit designs of formula and DC mode commons.
Utility model content
The utility model provides a kind of uninterruptible power supply converter circuit, solves when rectifier fault occurs in UPS,
It switches to DC patterns to power for successive load, improves the reliability of UPS, while AC patterns can be shared and shared under DC patterns
Discharger power so that AC patterns and under DC patterns share circuit compatibility it is more preferable, reduce design cost.
The technical solution of the utility model is：A kind of uninterruptible power supply converter circuit, including be electrically connected with input AC
AC/DC modules, AC/DC modules one-way conduction to DC bus module, DC bus module bidirectional conduction to DC/DC modules,
DC/DC modules bidirectional conduction is to BAT modules, BAT modules one-way conduction to AC/DC modules.
Further, the utility model is also characterized by：
Wherein DC/DC modules include one or more bidirectional conduction power switch.
Wherein BAT modules are single group battery or two groups of series-connected cells.
Wherein BAT modules are two groups of series-connected cells, and DC/DC modules include two DC/DC converters, and two DC/DC become
The side of parallel operation is separately connected the positive bus-bar BUS+ and negative busbar BUS- of DC bus module, the side of two DC/DC converters
Connect the midpoint of N lines and two groups of series-connected cells；The other side of two DC/DC converters is separately connected the anode of series battery
BAT+ and negative terminal BAT-.
Two of which DC/DC converters independently work or coupling operational.
Wherein BAT modules are single group battery, and one end of BAT modules is directly connect with N lines, and the other end passes through switch and L lines
Connection；DC/DC modules include two DC converters, and the side of two DC/DC converters is separately connected DC bus module
Positive bus-bar BUS+ and negative busbar BUS-, the side of two DC/DC converters connect N lines；The other side of two DC/DC converters point
Not Lian Jie single group battery anode BAT+ and negative terminal BAT-.
Compared with prior art, the utility model has the beneficial effects that：DC/DC modules being capable of bidirectional conduction in this circuit
To BAT modules and DC bus module；Wherein under normal circumstances, AC/DC modules are by formed after rectification alternating current
Direct current, and to DC bus module fill can, then export, DC bus module is simultaneously by DC/DC modules to BAT
Module charges, and BAT modules export energy output by AC/DC modules again；But in AC/DC moulds rectifier element in the block
In the case of damage, lead to that energy storage can not be carried out to DC bus module, and BAT moulds energy in the block cannot pass through AC/DC
Module is exported, therefore setting is capable of the DC/DC modules of bidirectional conduction and realizes BAT and pass through DC/DC modules and DC bus
Module is exported, and the reliability of circuit is improved；And its voltage is often higher than BAT moulds due to alternating current input AC/DC modules
The voltage of block, therefore AC/DC modules, the outlet line of DC bus module and BAT modules, DC/ in the case of normal work
DC modules, DC bus module outlet line can share common discharger power under AC patterns and DC patterns jointly, because
This improves the compatibility of common circuit under AC patterns and DC patterns, greatly reduces design cost.
Further, DC/DC modules realize the bidirectional conduction of DC/DC modules by bidirectional conduction power switch.
Further, in order to improve the voltage of BAT modules, BAT moulds battery pack in the block could be provided as a battery
Group or two series batteries, improve the variability of circuit.
Further, for tool there are two the BAT modules of battery pack, DC/DC modules separately design two and battery pack
Corresponding two DC/DC converters are realized and carry out charge/discharge to two battery packs.
Further, two DC/DC converters correspond to a battery pack, and two DC/DC converters can be made to exist respectively
The positive-negative half-cycle alternate run for exchanging output, improves the efficiency of the charge/discharge of circuit.
Description of the drawings
Fig. 1 is the structural topology figure of the utility model；
Fig. 2 is the circuit structure diagram of embodiment 1 in the utility model；
Fig. 3 is the circuit structure diagram of embodiment 2 in the utility model.
In figure：SCR1-SCR 4 is rectifier；L1-L 4 is inductance；C1-C 2 is bus capacitor；Q1-Q 8 is two-way leads
Logical power switch.
Specific implementation mode
The technical solution of the utility model is further illustrated in the following with reference to the drawings and specific embodiments.
The utility model provides a kind of uninterruptible power supply converter circuit, as shown in Figure 1, including AC/DC modules, AC/
DC modules are rectifier, and alternating current is converted to direct current and carries out energy storage to DC bus module；The two of DC bus module
End is output end, and AC outputs are carried out by inverter INV modules；DC bus module connects with DC/DC module bidirectional conductions simultaneously
It connects, wherein DC/DC modules have bidirectional conduction power switch, and bidirectional conduction connects between DC/DC modules and BAT modules, BAT moulds
Block one-way conduction is to AC/DC modules.
Specific embodiment of the utility model is as follows：
Embodiment 1
BAT modules (i.e. battery module) use 2 groups of batteries, and DC/DC modules have 2 DC/DC converters.
As shown in Fig. 2, firewire is L, zero curve N；Firewire L is respectively connected to rectifier SCR1 and rectifier SCR2, wherein zero
Line N is connected to the midpoint of two groups of batteries of BAT modules；Rectifier SCR1 is opened by inductance L1, diode D1 and bidirectional conduction power
The first boost circuits for closing Q1 compositions are connect with DC bus module, and wherein DC bus module includes two bus capacitor C1
And C2；SCR2 forms the 2nd boost circuits and DC bus mould by inductance L2, diode D2 and bidirectional conduction power switch Q2
Block connects；Specific first boost circuits are connect with bus capacitor C1, and the 2nd boost circuits are connect with bus capacitor C2；Wherein
Bus capacitor C1 anodes are BUS+, and bus capacitor C2 negative terminals are BUS-, and are output end between BUS+ and BUS-, inverse by connecting
Become device INV modules and carries out AC outputs.
Bus capacitor C1 and C2 is connect with DC/DC modules, specifically, DC/DC modules include the first DC/DC converters and the
Two DC/DC converters, and the first DC/DC converters are connect with BUS+, the 2nd DC/DC converters are connect with BUS-；Wherein first
DC/DC converters include bidirectional conduction power switch Q3, bidirectional conduction power switch Q5 and inductance L3, bidirectional conduction power switch
One end of Q3 connects BUS+, one end of the other end and inductance L3 and bidirectional conduction power switch Q5 of bidirectional conduction power switch Q3
Connection, and the positive BAT+ of the other end connection BAT modules of inductance L3, the other end of bidirectional conduction power switch Q5 connect BAT
The midpoint of two battery packs of module；Wherein the 2nd DC/DC converters include that bidirectional conduction power switch Q4, bidirectional conduction power are opened
Q6 and inductance L4 is closed, one end of bidirectional conduction power switch Q4 connects BUS-, the other end and the electricity of bidirectional conduction power switch Q4
Sense L4 is connected with one end of bidirectional conduction power switch Q6, and the positive BAT- of the other end connection BAT modules of inductance L4, two-way
The midpoint of other end connection BAT two battery packs of module of conducting power switch Q6.
Wherein rectifier SCR1 can also connect by a rectifier SCR3 with BAT modules, and rectifier SCR2 may be used also
To be connect with BAT modules by a rectifier SCR4.
Two DC/DC converters independently work or coupling operational in the present embodiment；It refers to BAT moulds wherein to work independently
Block provides energy by the first DC/DC converters and the 2nd DC/DC converters for DC bus module；Coupling operational refers to BAT
Module is provided further through AC/DC modules for DC bus module both by the first DC/DC converters and the 2nd DC/DC converters
Energy.
In the present embodiment rectifier SCR1, rectifier SCR2, rectifier SCR3 and rectifier SCR4 be diode, IGBT or
The rectifying devices such as metal-oxide-semiconductor；Bidirectional conduction power switch Q1-Q6 is the full control property switching device such as IGBT or metal-oxide-semiconductor.
In the ac mode：Positive half cycle is exchanged, by the first boost circuits that are made of L1, Q1, D1 after SCR1 rectifications to straight
The bus capacitor C1 chargings of busbar modules are flowed, while DC bus module Q3, Q5, L3 and Q4, Q6, L4 respectively by being made of
Two DC converters charged simultaneously in two battery packs of BAT modules, two DC converters can charge also only simultaneously at this time
Self-charging.
Negative half period is exchanged, by giving DC bus module by the 2nd boost circuits that L2, Q2, D2 are formed after SCR2 rectifications
Bus capacitor C2 charging, while DC bus module is become by two DC being made of Q3, Q5, L3 and Q4, Q6, L4 respectively
Parallel operation charges in two battery packs simultaneously, and two DC converters can charge simultaneously at this time also charges alone.
DC patterns：Q3, Q4, Q5, Q6, L3, L4 form two DC converters respectively in exchange output positive-negative half-cycle and prime
Discharger parallel coupled is powered for successive load.Wherein positive half cycle is exported in exchange：First battery pack is made up of L1, Q1, D1
The first boost circuits and Q3, Q5, L3 composition the first DC converter parallel coupleds be DC bus module bus capacitor C1
Energy is provided, the addition of the first DC converters of Q3, Q5, L3 composition can reduce L1, Q1, D1 are formed under DC patterns first
The output power of boost circuits reduces device selection and requires；Exchange output negative half period：Second battery pack passes through L2, Q2, D2 group
At the 2nd boost circuits and Q4, Q6, L4 composition the 2nd DC converter parallel coupleds be DC bus module bus capacitor
C2 provides energy, and the addition of the 2nd DC converters of Q4, Q6, L4 composition can reduce L2, Q2, D2 are formed under DC patterns second
The output power of boost circuits reduces device selection and requires.
Embodiment 2
BAT modules use 1 group of battery, and DC/DC modules have 2 DC/DC converters.
As shown in figure 3, embodiment 2 and embodiment 1 difference lies in, increase bidirectional conduction power switch Q7 and Q8,
Power frequency conducting state is under AC and DC patterns, the coupling of two DC/DC converters when realizing single battery group.
In the ac mode, the first DC converters of exchange output positive half cycle, Q7 shutdowns, Q8 conductings, Q3, Q5 and L3 composition become
It is changed to discharger, and the DC converter parallel coupled of same L1, Q1 and D1 composition is bus capacitor C1 chargings, and it is inverse to meet rear class
Change demand.
Exchange output negative half period, the 2nd DC converters of Q7 conductings, Q8 shutdowns, Q4, Q6 and L4 composition are transformed to discharger,
DC converter parallel coupled with L2, Q2 and D2 composition is bus capacitor C2 chargings, meets rear class inversion demand.
In a dc mode, Q3, Q4, Q5, Q6, L3, L4 form the first DC converters and the 2nd DC converters are exchanging respectively
Positive-negative half-cycle is exported to power for successive load with prime discharger parallel coupled.
Claims (6)
1. a kind of uninterruptible power supply converter circuit, which is characterized in that include the AC/DC modules being electrically connected with input AC, AC/
DC modules one-way conduction is to DC bus module, and DC bus module bidirectional conduction to DC/DC modules, DC/DC modules are two-way to be led
Pass to BAT modules, BAT modules one-way conduction to AC/DC modules.
2. uninterruptible power supply converter circuit according to claim 1, which is characterized in that the DC/DC modules include one
A or multiple bidirectional conduction power switch.
3. a kind of uninterruptible power supply converter circuit according to claim 1-2 any one, which is characterized in that described
BAT modules are single group battery or two groups of series-connected cells.
4. a kind of uninterruptible power supply converter circuit according to claim 3, which is characterized in that the BAT modules are two
Group series-connected cell, DC/DC modules include two DC/DC converters, and the side of two DC/DC converters is separately connected direct current mother
The positive bus-bar BUS+ and negative busbar BUS- of wire module, the side of two DC/DC converters connects in N lines and two groups of series-connected cells
Point；The other side of two DC/DC converters is separately connected the anode BAT+ and negative terminal BAT- of series battery.
5. a kind of uninterruptible power supply converter circuit according to claim 4, which is characterized in that described two DC/DC become
Parallel operation independently works or coupling operational.
6. a kind of uninterruptible power supply converter circuit according to claim 3, which is characterized in that the BAT modules are single
Group battery, one end of BAT modules are directly connect with N lines, and the other end is connect by switching with L lines；DC/DC modules include two DC
Converter, and the side of two DC/DC converters is separately connected the positive bus-bar BUS+ and negative busbar BUS- of DC bus module, two
The side of a DC/DC converters connects N lines；The other side of two DC/DC converters is separately connected the anode BAT+ of single group battery
With negative terminal BAT-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721675853.0U CN207719888U (en) | 2017-12-05 | 2017-12-05 | A kind of uninterruptible power supply converter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721675853.0U CN207719888U (en) | 2017-12-05 | 2017-12-05 | A kind of uninterruptible power supply converter circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207719888U true CN207719888U (en) | 2018-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721675853.0U Active CN207719888U (en) | 2017-12-05 | 2017-12-05 | A kind of uninterruptible power supply converter circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054700A (en) * | 2020-07-31 | 2020-12-08 | 漳州科华技术有限责任公司 | Conversion circuit |
| WO2024060386A1 (en) * | 2022-09-21 | 2024-03-28 | 维谛技术有限公司 | Rectifying converter for uninterruptible power supply and control method therefor |
-
2017
- 2017-12-05 CN CN201721675853.0U patent/CN207719888U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054700A (en) * | 2020-07-31 | 2020-12-08 | 漳州科华技术有限责任公司 | Conversion circuit |
| WO2024060386A1 (en) * | 2022-09-21 | 2024-03-28 | 维谛技术有限公司 | Rectifying converter for uninterruptible power supply and control method therefor |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 710077 R & D building 101, 102-2, C science and Technology Industrial Park, 211 Tiangu Road, Xi'an, Shaanxi Patentee after: Xi'an Telai Intelligent Charging Technology Co.,Ltd. Address before: 710077 R & D building 101, 102-2, C science and Technology Industrial Park, 211 Tiangu Road, Xi'an, Shaanxi Patentee before: XI'AN TGOOD INTELLIGENT CHARGING TECHNOLOGY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |