CN205911824U - Uninterrupted power supply - Google Patents
Uninterrupted power supply Download PDFInfo
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- CN205911824U CN205911824U CN201620893066.2U CN201620893066U CN205911824U CN 205911824 U CN205911824 U CN 205911824U CN 201620893066 U CN201620893066 U CN 201620893066U CN 205911824 U CN205911824 U CN 205911824U
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Abstract
The utility model relates to an uninterrupted power supply, including an energy storage unit, one or three level inverter circuit, a boost circuit, first thyristor, second thyristor, third thyristor, third switching element, first electric capacity and second electric capacity, boost circuit includes first switching element, second switch device, first inductance, second inductance, first diode and second diode. The utility model provides an uninterrupted power supply, the PN junction is less, and the PN junction loss is less, and conversion efficiency is higher, and control circuit is simple, and output efficiency is high, and is with low costs.
Description
Technical field
This utility model is related to field of power supplies, particularly to a kind of uninterrupted power source and its control method.
Background technology
Nowadays uninterrupted power source (ups) is extensively applied and all trades and professions such as electric power, finance, government, hospital, manufacture
In, it can ensure that the equipment that it is connected works on a period of time after having a power failure, and ensures user not because of unexpected power failure
Impact work or lose data etc., and can also eliminating on civil power as surge, instantaneous pressure etc. " power pollution ", provide stable,
High-quality output voltage gives connected load.To lifting delivery efficiency, raising in continuous development with technology and market
Power factor (PF), the requirement also more and more higher of reduces cost.
Uninterrupted power source core component or circuit generally comprise: rectifier boost, inversion, charging and control circuit etc..Existing
The reduces cost while control technology of modern uninterrupted power source trends towards Digital Control, improves power density and efficiency.
As Fig. 1, in the prior art, what ups rectifier boost topology was the more commonly used is first rectification boost boosting again, and this is opened up
The loop of power circuit pn-junction flutterred is more, and conversion efficiency is relatively low.
As Fig. 2, inversion topological is double-bus or single busbar according to dc bus, and half-bridge topology or full-bridge can be selected to open up
Flutter, also three level etc..Double-bus generally selects semi-bridge inversion topology:, relative to three level, the dv/dt of output is big, inverse for this topology
Become inductor loss big, efficiency is relatively low；Single busbar generally selects full-bridge topology, the inapplicable exchange input of this topology and output totally zero
The application of line, need to increase isolating transformer, and same efficiency is relatively low.
As Fig. 3, what the topology that charges was more common is the stream flyback blood pressure lowering again of first commercial power rectification, or is directly inputted by bus again
Do flyback blood pressure lowering, this topology is because with transformator, conversion efficiency is low.
Additionally, controlling angle to consider from circuit, rectifier boost, inversion, charge traditional by power source special control chip (such as
3845,3854) or analog circuit, or mcu/dsp is respectively controlled to each topology, control system is complicated, and integrated level is not high,
Easily affected by characteristics such as the numerous discrete device temperature drifts of peripheral circuit.
Content of the invention
The purpose of this utility model is to provide a kind of uninterrupted power source and its control method, is deposited with overcoming in prior art
Defect.
For achieving the above object, the technical solution of the utility model is: a kind of uninterrupted power source, including energy-storage units,
One three-level inverter circuit, a booster circuit, the first IGCT, the second IGCT, the 3rd IGCT, the 3rd switching device,
One electric capacity and the second electric capacity；Described booster circuit include first switch device, second switch device, the first inductance, the second inductance,
First diode and the second diode；
The anode of described first IGCT connects to the positive pole of described energy-storage units, and one end of described 3rd switching device is even
It is connected to the negative pole of described energy-storage units, the negative electrode of described first IGCT is respectively connected to the negative electrode of described second IGCT and described
One end of first inductance, the anode of described second IGCT is respectively connected to the live wire of civil power input and the negative electrode of the 3rd IGCT,
The anode of described 3rd IGCT is respectively connected to the other end of the 3rd switching device and one end of the second inductance, described first switch
One end of device is connected to the other end of described first inductance and the anode of described first diode, described second switch device respectively
The other end be connected to the other end of described second inductance and the negative electrode of described second diode, the moon of described first diode respectively
Pole is connected with the positive pole of described first electric capacity and is connected to a positive bus-bar, the positive input terminal of described three-level inverter circuit with described
Positive bus-bar is connected, and the anode of described second diode is connected with the negative pole of described second electric capacity and is connected to a negative busbar, described
The negative input end of three-level inverter circuit is connected with described negative busbar, and the zero line of civil power input is respectively connected to described first switch device
The other end of part, one end of described second switch device, the negative pole of described first electric capacity, the positive pole of described second electric capacity and three electricity
The midpoint of flat inverter circuit.
In this utility model one embodiment, also include a charging circuit；The positive input terminal of described charging circuit connect to
Described positive bus-bar, negative input end connects to described negative busbar；The positive output end of described charging circuit connects to described energy-storage units
Positive pole, negative output terminal connects to described energy-storage units negative pole；
Described charging circuit includes: the 4th switching device, the 3rd diode, the 3rd electric capacity, the 3rd inductance, first unidirectional
Electrical part and the 5th switching device；The positive input terminal of described charging circuit is one end of described 4th switching device；Described
The other end of four switching devices is respectively connecting to the negative electrode of described 3rd diode, the positive pole of described 3rd electric capacity and described
The anode of one unilateal conduction device；The positive output end of described charging circuit is the negative electrode of described first unilateal conduction device；Described
One end of 5th switching device is respectively connecting to the anode of described 3rd diode and one end of described 3rd inductance；Described charging
The negative input end of circuit is the other end of the 5th switching device；The negative output terminal of described charging circuit is the another of described 3rd inductance
One end and the cathode connection of described 3rd electric capacity.
In this utility model one embodiment, described three-level inverter circuit is t type three-level inverter circuit or i type three electricity
Flat inverter circuit.
In this utility model one embodiment, described 3rd switching device is relay or IGCT.
In this utility model one embodiment, described first IGCT to described 3rd IGCT, described tri-level inversion
Circuit, described booster circuit, the control end of described 3rd switching device are all connected to a control unit, and described control unit adopts
One control chip.
Compared to prior art, this utility model has the advantages that
1st, the pn-junction in the rectifier boost topology of the present invention is less, and pn-junction is lost less, reduces cost, and conversion efficiency is relatively
High；
2nd, the charging circuit that the present invention adopts, without transformator, improves conversion efficiency；
3rd, due to being controlled to each circuit using same control unit, its hardware control circuit is simple, relatively for the present invention
Few discrete device, therefore be difficult to be affected by temperature characterisitic；Integrated level is high, controls flexibly, and change control strategy is easily achieved.
4th, the solution of the present invention improves delivery efficiency, reduces cost.
Brief description
Fig. 1 is the rectifier boost topology of the uninterrupted power source being related in prior art.
Fig. 2 is the inversion topological of the uninterrupted power source being related in prior art.
Fig. 3 is the charging topology of the uninterrupted power source being related in prior art.
Fig. 4 is the uninterrupted power supply circuit topology in this utility model.
Fig. 5 is the charging circuit of the uninterrupted power source in this utility model.
Specific embodiment
Below in conjunction with the accompanying drawings, the technical solution of the utility model is specifically described.
Further, as Fig. 4, this utility model provides a kind of uninterrupted power source, including energy-storage units, one or three level
Inverter circuit, a booster circuit, the first IGCT scr1, the second IGCT scr2, the 3rd IGCT scr3, the 3rd switching device
Q3, the first electric capacity c1 and the second electric capacity c2；Booster circuit includes first switch device q1, second switch device q2, the first inductance
L1, the second inductance l2, the first diode d1, the second diode d2.
The anode of the first IGCT scr1 connects to the positive pole of energy-storage units bat, and one end of the 3rd switching device q3 connects
To the negative pole of energy-storage units bat, the negative electrode of the first IGCT scr1 is respectively connected to negative electrode and first electricity of the second IGCT scr2
One end of sense l1, the anode of the second IGCT scr2 is respectively connected to the live wire of civil power input and the negative electrode of the 3rd IGCT scr3,
The anode of the 3rd IGCT scr3 is respectively connected to the other end of the 3rd switching device q3 and one end of the second inductance l2, first switch
One end of device q1 is connected to the other end of the first inductance l1 and the anode of the first diode d1 respectively, and second switch device q2's is another
One end is connected to the other end of the second inductance l2 and the negative electrode of the second diode d2, the negative electrode of the first diode d1 and the first electricity respectively
The positive pole holding c1 is connected and is connected to positive bus-bar bus+, and the positive input terminal of three-level inverter circuit is connected with positive bus-bar bus+, the
The anode of two diode d2 is connected with the negative pole of the second electric capacity c2 and is connected to negative busbar bus-, three-level inverter circuit negative defeated
Enter end to be connected with negative busbar bus-, the zero line of civil power input is respectively connected to the other end of first switch device q1, second switch device
One end of part q2, the midpoint of the negative pole of the first electric capacity c1, the positive pole of the second electric capacity c2 and three-level inverter circuit.
Further, as Fig. 5, uninterrupted power source also includes a charging circuit, and the positive input terminal of charging circuit is just connected to
Bus bus+, the negative input end of charging circuit connects to negative busbar bus-, and the positive output end of charging circuit connects to energy-storage units
Bat positive pole, the negative output terminal of charging circuit connects to energy-storage units bat negative pole.
One end of 4th switching device q4 connects as the positive input terminal of charging circuit, the other end of the 4th switching device q4
To the anode of the negative electrode, the positive pole of the 3rd electric capacity c3 and the first unilateal conduction device sd1 of the 3rd diode d3, the first unilateal conduction
The negative electrode of device sd1 connects to the 3rd diode d3's as the positive output end of charging circuit, one end of the 5th switching device q5
Anode and one end of the 3rd inductance l3, the other end of the 5th switching device q5 is as the negative input end of charging circuit, the 3rd inductance
The other end of l3 connects the negative electrode to the 3rd electric capacity c3 the negative output terminal as charging circuit.
In the present embodiment, the first unilateal conduction device sd1 is IGCT, when busbar voltage is less than cell voltage, control
Cutoff thyristor sd1 processed, prevent battery pass through the 4th switching device q4, the 3rd electric capacity c3, internal the two of the 5th switching device q5
Pole pipe and the 3rd inductance l3 constitute the loop do not controlled, and after charging voltage is stablized, then control IGCT sd1 to turn on.
Further, in the present embodiment, first switch device q1, second switch device q2 and the 5th switching device q5
One end be drain electrode or the colelctor electrode of switching tube, the other end is source electrode or the emitter stage of switching tube.
Further, three-level inverter circuit is t type three-level inverter circuit or i type three-level inverter circuit.
Further, the 3rd switching device q3 is relay or IGCT.
Further, the first to the 3rd IGCT scr3, three-level inverter circuit, booster circuit, the 3rd switching device q3
Control end be all connected to same control unit.
Further, in the present embodiment, in order to allow those skilled in the art further appreciate that this utility model is proposed
Technical scheme, also provide a kind of control method of uninterrupted power source to illustrate.Involved existing in this declarative procedure
Software or control method be not the object that this utility model is protected, this utility model only protect this circuit structure and its
Annexation.
Further, when civil power is normal, control the second IGCT scr2 and the 3rd IGCT scr3 conducting, control first
IGCT scr1 and the 3rd switching device q3 turns off, and controls uninterrupted power source to work in civil power operational mode；
When city's electrical anomaly, control the second IGCT scr2 and the 3rd IGCT scr3 to turn off, control the first IGCT
Scr1 and the 3rd switching device q3 conducting, controls uninterrupted power source to work in battery operation pattern.
Further, uninterrupted power source works in the control mode of civil power operational mode and includes with the next stage:
When civil power is in positive half period, second switch device q2 is controlled to be off state；First stage, control first
Switching device q1 is in the conduction state, and line voltage is through the second IGCT scr2, the first inductance l1, first switch device q1 group
The loop becoming stores electric energy to the first inductance l1；Second stage, controls first switch device q1 to be off state, the first inductance
L1 afterflow, line voltage is through returning that the second IGCT scr2, the first inductance l1, the first diode d1, the first electric capacity c1 form
Charge to the first electric capacity c1 in road；
When civil power is in negative half-cycle, first switch device q1 is controlled to be off state；Phase III, control second
Switching device q2 is in the conduction state, and line voltage is through second switch device q2, the second inductance l2, the 3rd IGCT scr3 group
The second inductance l2 storage electric energy is given in the loop becoming；Fourth stage, controls second switch device q2 to be off state, the second inductance
L2 afterflow, the loop that line voltage forms through the second electric capacity c2, the second diode d2, the second inductance l2 and the 3rd IGCT scr3
Charge to the second electric capacity c2.
Further, uninterrupted power source works in the control mode of battery operation pattern and includes with the next stage:
Control second switch device q2 to be in constant conduction state, first stage, control first switch device q1 to be in and lead
Logical state, energy-storage units bat passes through energy-storage units bat positive pole, the first IGCT scr1, the first inductance l1, first switch device
Q1, the loop of second switch device q2, the second inductance l2, the 3rd switching device q3 and energy-storage units bat negative pole composition are to first
Inductance l1, the second inductance l2 storage energy；Second stage, controls first switch device q1 to be off state, energy-storage units bat
By energy-storage units bat positive pole, the first IGCT scr1, the first inductance l1, the first diode d1, the first electric capacity c1, second open
The loop closing device q2, the second inductance l2, the 3rd switching device q3 and energy-storage units bat negative pole composition is filled to the first electric capacity c1
Electricity.
Control first switch device q1 to be in constant conduction state, phase III, control second switch device q2 to be in and lead
Logical state, energy-storage units bat passes through energy-storage units bat positive pole, the first IGCT scr1, the first inductance l1, first switch device
Q1, the loop of second switch device q2, the second inductance l2, the 3rd switching device q3 and energy-storage units bat negative pole composition are to first
Inductance l1, the second inductance l2 storage energy；Fourth stage, controls second switch device q2 to be off state, energy-storage units bat
By energy-storage units bat positive pole, the first IGCT scr1, the first inductance l1, first switch device q1, the second electric capacity c2, second
The loop of diode d2, the second inductance l2, the 3rd switching device q3 and energy-storage units bat negative pole composition is filled to the second electric capacity c2
Electricity.
Further, when charging circuit works in civil power operational mode, energy-storage units bat charge control method include with
Next stage:
Control the 4th switching device q4 and the first unilateal conduction device sd1 in the conduction state, the first stage, control the 5th
Switching device q5 is in the conduction state, and electric current passes through positive bus-bar bus+, the 4th switching device q4, the 3rd electric capacity c3, the 3rd inductance
The loop of l3, the 5th switching device q5 and negative busbar bus- composition stores energy to the 3rd electric capacity c3 and the 5th switching device q5,
Charge to energy-storage units bat simultaneously；Second stage, controls the 5th switching device q5 to be off, and electric current passes through the 3rd electricity
Sense l3, the loop of the 3rd diode d3 and the 3rd electric capacity c3 composition make the 3rd electric capacity c3 and the 3rd inductance l3 release energy to energy storage
Unit bat charges.
It is more than preferred embodiment of the present utility model, all changes made according to technical solutions of the utility model, produced
Function without departing from technical solutions of the utility model scope when, belong to protection domain of the present utility model.
Claims (5)
1. a kind of uninterrupted power source it is characterised in that: include energy-storage units, a three-level inverter circuit, a booster circuit, the
One IGCT, the second IGCT, the 3rd IGCT, the 3rd switching device, the first electric capacity and the second electric capacity；Described booster circuit bag
Include first switch device, second switch device, the first inductance, the second inductance, the first diode and the second diode；
The anode of described first IGCT connects to the positive pole of described energy-storage units, one end of described 3rd switching device connect to
The negative pole of described energy-storage units, the negative electrode of described first IGCT is respectively connected to the negative electrode and described first of described second IGCT
One end of inductance, the anode of described second IGCT is respectively connected to the live wire of civil power input and the negative electrode of the 3rd IGCT, described
The anode of the 3rd IGCT is respectively connected to the other end of the 3rd switching device and one end of the second inductance, described first switch device
One end be connected to the other end of described first inductance and the anode of described first diode respectively, described second switch device another
One end is connected to the other end of described second inductance and the negative electrode of described second diode respectively, the negative electrode of described first diode with
The positive pole of described first electric capacity is connected and is connected to a positive bus-bar, the positive input terminal of described three-level inverter circuit and described positive pole
Line is connected, and the anode of described second diode is connected with the negative pole of described second electric capacity and is connected to a negative busbar, described three electricity
The negative input end of flat inverter circuit is connected with described negative busbar, and the zero line of civil power input is respectively connected to described first switch device
The other end, one end of described second switch device, the negative pole of described first electric capacity, the positive pole of described second electric capacity and three level are inverse
Become the midpoint of circuit.
2. a kind of uninterrupted power source according to claim 1 is it is characterised in that also include a charging circuit；Described charging
The positive input terminal of circuit connects to described positive bus-bar, and negative input end connects to described negative busbar；The positive output of described charging circuit
End connects to described energy-storage units positive pole, and negative output terminal connects to described energy-storage units negative pole；
Described charging circuit includes: the 4th switching device, the 3rd diode, the 3rd electric capacity, the 3rd inductance, the first unidirectional electrical equipment
Part and the 5th switching device；The positive input terminal of described charging circuit is one end of described 4th switching device；Described 4th opens
The other end closing device is respectively connecting to the negative electrode of described 3rd diode, the positive pole of described 3rd electric capacity and described first list
Anode to conductive devices；The positive output end of described charging circuit is the negative electrode of described first unilateal conduction device；Described 5th
One end of switching device is respectively connecting to the anode of described 3rd diode and one end of described 3rd inductance；Described charging circuit
Negative input end be the 5th switching device the other end；The negative output terminal of described charging circuit is the other end of described 3rd inductance
Cathode connection with described 3rd electric capacity.
3. a kind of uninterrupted power source according to claim 1 is it is characterised in that described three-level inverter circuit is t type three
Level inverter circuit or i type three-level inverter circuit.
4. a kind of uninterrupted power source according to claim 1 it is characterised in that described 3rd switching device be relay or
IGCT.
5. a kind of uninterrupted power source according to claim 1 is it is characterised in that described first IGCT is trimorphism to described the
Brake tube, described three-level inverter circuit, described booster circuit, the control end of described 3rd switching device are all connected to a control list
Unit, described control unit adopts a control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620893066.2U CN205911824U (en) | 2016-08-17 | 2016-08-17 | Uninterrupted power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620893066.2U CN205911824U (en) | 2016-08-17 | 2016-08-17 | Uninterrupted power supply |
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| Publication Number | Publication Date |
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| CN205911824U true CN205911824U (en) | 2017-01-25 |
Family
ID=57800624
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620893066.2U Active CN205911824U (en) | 2016-08-17 | 2016-08-17 | Uninterrupted power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253458A (en) * | 2016-08-17 | 2016-12-21 | 漳州科华技术有限责任公司 | A kind of uninterrupted power source and control method thereof |
-
2016
- 2016-08-17 CN CN201620893066.2U patent/CN205911824U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253458A (en) * | 2016-08-17 | 2016-12-21 | 漳州科华技术有限责任公司 | A kind of uninterrupted power source and control method thereof |
| CN106253458B (en) * | 2016-08-17 | 2019-05-21 | 漳州科华技术有限责任公司 | A kind of uninterruptible power supply and its control method |
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