CN100407544C - Charging circuit and uninterrupted power supply system using the same - Google Patents

Charging circuit and uninterrupted power supply system using the same Download PDF

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Publication number
CN100407544C
CN100407544C CN2004100869352A CN200410086935A CN100407544C CN 100407544 C CN100407544 C CN 100407544C CN 2004100869352 A CN2004100869352 A CN 2004100869352A CN 200410086935 A CN200410086935 A CN 200410086935A CN 100407544 C CN100407544 C CN 100407544C
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China
Prior art keywords
transformer
circuit
primary side
charging circuit
connected
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CN2004100869352A
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Chinese (zh)
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CN1764036A (en
Inventor
赖渊芳
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台达电子工业股份有限公司
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Publication of CN1764036A publication Critical patent/CN1764036A/en
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Abstract

The present invention provides a charge circuit and an uninterrupted power supply system with the charge circuit, which are used for receiving DC voltage input and converting the DC voltage input to required DC voltage output. The charging circuit comprises a voltage distributing circuit, a switch, a control device, a transformer and a rectifying filter circuit, wherein the voltage distributing circuit receives DC voltage input, and divides the DC voltage input into much voltage; the switch is connected with the voltage distributing circuit, and is provided with a plurality of switch elements; the control device senses the DC voltage output, and generates many control signals to control the switch elements of the switch to be switched on in a staggered mode; the transformer is provided with a primary side and a secondary side, wherein the primary side is connected with the switch; the rectifying filter circuit is connected with the secondary side of the transformer, and the rectifying filter circuit is used for carrying out rectification and filtering for the output voltage of the transformer in order to obtain the DC voltage output. By the utilization of the present invention, the utilization rate of the transformer can be improved, the cost of the transformer is reduced, and electromagnetic noise interference is reduced.

Description

Charging circuit and use the non-interrupted power supply system of this charging circuit

Technical field

The present invention is about a kind of charging circuit and use the non-interrupted power supply system of this charging circuit.

Background technology

In electronics and communication system operation, continual power supply is input as the primary condition of keeping its normal operation, yet the municipal power supply system of present stage often is subjected to transmission line broken string and short circuit accident, cause electric power unusual conditions such as pressure drop or power breakdown to occur, and then influence the power supply quality of electric power, so non-interrupted power supply system (uninterruptible power supply, UPS) be widely used in client, to help solve the problem of contingent input power source abnormality.The operating principle of non-interrupted power supply system be civil power just often, in advance with electrical power storage in storage battery, in civil power, have no progeny and use for load from the storage battery out-put supply again.Present non-interrupted power supply system circuit framework can be divided into three kinds of the interactive type (Line-Interactive) of line style (On-Line), power supply and offline models (Off-Line).See also Fig. 1, it shows a known circuit block diagram at the line style non-interrupted power supply system.As shown in the figure, should mainly comprise AC/DC converter (AC/DC converter) 11, inverter (inverter) 12, charging circuit (charging circuit) 13, battery (battery) 14, switch element 15 and DC-DC converter 16 at line style non-interrupted power supply system 1.AC/DC converter 11 is used for receiving a civil power alternating voltage Vin, and converts this civil power alternating voltage Vin to the direct current form.This charging circuit 13 is electrically connected with AC/DC converter 11, in order to receiving the direct voltage that AC/DC converter 11 is exported, and converts this direct voltage to battery 14 required direct voltage Vout2 so that battery 14 is charged.Inverter 12 is electrically connected with AC/DC converter 11, with the direct voltage that is used for AC/DC converter 11 is exported, or battery 14 voltages are via DC-DC converter 16 direct voltage exported of back that boosts, be converted to reliable and stable ac output voltage Vout1, use so that load (load) to be provided.Should can be divided into three kinds of running situations at line style non-interrupted power supply system 1:

(1) when the civil power normal power supply, after alternating voltage Vin converts direct voltage to through AC/DC converter 11, on the one hand convert direct voltage to battery 14 required direct voltage Vout2 so that battery 14 is charged by charging circuit 13, then convert ac output voltage Vout1 to through inverter 12 on the other hand, again via switch element 15 to export load to.

(2) when inverter 12 breaks down, switch to bypass (Bypass) loop by switch element 15, so that civil power is directly provided to load.

(3) when civil power interrupts, transfer to inverter 12 after then boosting via DC-DC converter 16 by battery 14 output dc voltages, after inverter 12 is converted to ac output voltage Vout1, switch to export load to again by switch element 15.

See also Fig. 2, it is the schematic diagram of the charging circuit of non-interrupted power supply system shown in Figure 1, wherein the circuit framework of charging circuit 13 is flyback circuit topography (Flyback Topology) framework, whether it comes control switch element Q1 conducting by control device 131, and cooperates the diode D1 and the capacitor C 1 of transformer T1 primary side to come output dc voltage Vout2.

Though it is simple to have charging circuit 13 frameworks of flyback circuit topography framework, and shortcoming is also arranged.See also Fig. 3, the charging circuit of its displayed map 2 is in the voltage VQ1 and the time relation figure of Node B.When the voltage VQ1 of this Node B is in high state, switch element Q1 conducting, therefore electric current can reach energy the primary side of transformer T1 with the primary side of direction A inflow transformer T1; When the voltage VQ1 of this Node B was in low state, switch element Q1 ended, and electric current then can not change in the primary side of transformer T1, therefore energy can't be reached the primary side of transformer T1.As seen from the figure, this switch element Q1 is only in the conducting of two/one-period, since this charging circuit 13 only by a switch element Q1 as actuating switch, so will make the electric current only can be with the primary side of single direction inflow transformer T1, therefore transformer T1 only can use two minutes one-period, makes the utilance of transformer T1 not good, simultaneously, also increased electromagnetic noise interference (Electro-Magnetic Interference, EMI).

Hence one can see that, and the transformer T1 of the charging circuit 13 of known flyback circuit topography framework is except that utilance is not good, and the cost of transformer T1 is higher, and exist serious electromagnetic noise interference problem again.Therefore, how to develop a kind of non-interrupted power supply system that can improve the charging circuit of above-mentioned known technology disappearance and use this charging circuit, real in pressing for the problem of solution at present.

Summary of the invention

Main purpose of the present invention is for providing a kind of charging circuit and use the non-interrupted power supply system of this charging circuit, problem such as, transformer cost height not good with the transformer utilization factor of the charging circuit that solves traditional non-interrupted power supply system and electromagnetic noise interference are serious.

For reaching above-mentioned purpose, of the present invention one implements the sample attitude for a kind of charging circuit is provided than broad sense, and it is applied to a non-interrupted power supply system, in order to receiving direct current voltage input, and is converted to required direct voltage output.This charging circuit comprises at least: a bleeder circuit, and it receives the input of this direct voltage, and is a plurality of voltages with this direct voltage input dividing potential drop; One switching device, it is connected with this bleeder circuit, and has a plurality of switch elements; One transformer, it has a primary side and a primary side, and wherein an end of this primary side is connected in this switching device, and the other end of this primary side then is connected in this bleeder circuit; One control device, this direct voltage output of its sensing, and produce a plurality of control signals, with the staggered conducting of these a plurality of switch elements of controlling this switching device; And a current rectifying and wave filtering circuit, it is connected in this primary side of this transformer, carries out rectification and filtering in order to the output voltage to this transformer, to obtain this direct voltage output.

According to conception of the present invention, wherein this charging circuit also comprises a compensating circuit, and it is connected between this primary side and this bleeder circuit of this transformer, and is equal in fact with the energy of this primary side of guaranteeing to circulate in this transformer.

According to conception of the present invention, wherein this compensating circuit comprises an electric capacity.

According to conception of the present invention, wherein this charging circuit is half bridge converter.

According to conception of the present invention, wherein this bleeder circuit is made up of at least two electric capacity.

According to conception of the present invention, wherein this switching device comprises one first switch element and a second switch element, this first switch element and this second switch element be subjected to one first control signal of this control device and the control of one second control signal with staggered conducting with end.

According to conception of the present invention, wherein this charging circuit also comprises a current sensor, and it is connected in this control device, changes with this primary side and the electric current between this bleeder circuit that is used for this transformer of sensing.

For reaching above-mentioned purpose, another implements the sample attitude for a kind of non-interrupted power supply system is provided than broad sense the present invention, and it comprises an AC/DC converter, an inverter, a charging circuit, a battery and a DC-DC converter.This non-interrupted power supply system is characterised in that this charging circuit comprises: a bleeder circuit, and it receives direct current voltage input, and is a plurality of voltages with this direct voltage input dividing potential drop; One switching device, it is connected with this bleeder circuit, and has a plurality of switch elements; One transformer, it has a primary side and a primary side, and wherein an end of this primary side is connected in this switching device, and the other end of this primary side then is connected in this bleeder circuit; One control device, this direct voltage output of its sensing, and produce a plurality of control signals, with the staggered conducting of these a plurality of switch elements of controlling this switching device; And a current rectifying and wave filtering circuit, it is connected in this primary side of this transformer, carries out rectification and filtering in order to the output voltage to this transformer, to obtain this direct voltage output.

Utilize charging circuit of the present invention and use the non-interrupted power supply system of this charging circuit, make the primary side that circulates in transformer that electric current can be two-way, so transformer just is able to utilize fully in arbitrary cycle, make the utilance of transformer promote.Also therefore, under the condition that produces identical rechargeable energy, just the employed transformer cost of charging circuit that can be more known is low.In addition, also can reduce the problem of electromagnetic noise interference.

The present invention will be by following accompanying drawing and embodiment explanation, to obtain clearer understanding.

Description of drawings

Fig. 1 shows a known circuit block diagram at the line style non-interrupted power supply system.

Fig. 2 is the schematic diagram of the charging circuit of non-interrupted power supply system shown in Figure 1.

The charging circuit of Fig. 3 displayed map 2 is in the voltage VQ1 and the time relation figure of Node B.

Fig. 4 is the charging circuit schematic diagram of the non-interrupted power supply system of preferred embodiment of the present invention.

The charging circuit of Fig. 5 displayed map 4 is in the first control signal VQ2 and the second control signal VQ3 and the time relation figure of node C, D.

Wherein, description of reference numerals is as follows:

1 at line style non-interrupted power supply system 11 AC/DC converters

12 inverters, 13,2 charging circuits

14 batteries, 15 switch elements

16 DC-DC converters, 21 bleeder circuits

22 compensating circuits, 131,23 control device

24 switching devices, 25 transformers

26 current rectifying and wave filtering circuits, 231 current sensors

Embodiment

Some exemplary embodiments that embody feature of the present invention and advantage will be described in detail in the explanation hereinafter.Be understood that the present invention can have various variations on different aspects, its neither departing from the scope of the present invention, and explanation wherein and the accompanying drawing usefulness that ought explain in itself, but not in order to restriction the present invention.

Charging circuit 2 of the present invention is applicable to a non-interrupted power supply system, and is for example shown in Figure 1 at line style non-interrupted power supply system 1, to be used to replace traditional charging circuit 13.See also Fig. 4, it is for the charging circuit schematic diagram of preferred embodiment of the present invention.As shown in Figure 4, charging circuit 2 of the present invention is semibridge system transducer (half bridge converter), its input receives the direct voltage VDC that is exported by AC/DC converter 11 (seeing also Fig. 1), and converts this direct voltage VDC to battery 14 (please refer to Fig. 1) required direct voltage Vout2 so that battery 14 is charged.This charging circuit 2 consists predominantly of bleeder circuit 21, compensating circuit 22, control device 23, switching device 24, transformer 25 and current rectifying and wave filtering circuit 26 etc.

Bleeder circuit 21 has a plurality of capacitor C 1, C2, and it is the first voltage V1 and the second voltage V2 with direct voltage VDC dividing potential drop.Switching device 24 is connected in this bleeder circuit 21, and has the first switch element Q2 and second switch element Q3.Transformer 25 has a primary side and a primary side, and wherein an end of primary side is connected with switching device 24, and the other end of primary side then is connected with bleeder circuit 21.Control device 23 is connected in the output of switching device 24 and charging circuit 2, and by current sensor 231 senses flow that connect through the electric current of 21 of transformer 25 primary sides and bleeder circuits change and the VD Vout2 of sensing charging circuit 2 after, produce the first control signal VQ2 and the second control signal VQ3 to distinguish the first switch element Q2 and the second switch element Q3 of control switch device 24.In this embodiment, the first switch element Q2 and the second switch element Q3 of switching device 24 are complementary state, in other words, when the first control signal VQ2 is high state, the second control signal VQ3 just is low state, and the first switch element Q2 can be conducting state, and second switch element Q3 then is not on-state.On the contrary, when the first control signal VQ2 was low state, the second control signal VQ3 just was a high state, and the first switch element Q2 can be not on-state, and second switch element Q3 then is conducting state.The charging circuit of Fig. 5 displayed map 4 is in the first control signal VQ2 and the second control signal VQ3 and the time relation figure of node C, D.As seen from the figure, in arbitrary period T, first switch element Q2 of switching device 24 and second switch element Q3 will be complementary staggered conducting.

Please consult Fig. 4 again, when the first switch element Q2 conducting, electric current is with the primary side of direction A2 inflow transformer 25; When second switch element Q3 conducting, electric current flows out the primary side of transformer 25 with direction A3.Therefore by the mutual conducting of the first switch element Q2 and second switch element Q3, will electric current be two-way circulated in the primary side of transformer 25, and then transformer 25 utilances are promoted.In addition, because bleeder circuit 21 has a plurality of capacitor C 1, C2, and each capacitor C 1, the capacitance of C2 can't be reached the ideal value of expection, make the energy of inflow transformer 25 primary sides difference may take place with the energy that flows out transformer 25 primary sides, therefore optionally increase by a compensating circuit 22, connect between this primary side of transformer 25 and bleeder circuit 21, to compensate, equate in fact with the energy that flows out transformer 25 primary sides with the energy of guaranteeing inflow transformer 25 primary sides.Certainly, compensating circuit 22 is preferable with a capacitor C x.The bidirectional current of transformer 25 primary sides changes, can make transformer 25 primary side produce induced voltage, via the rectification and the filter action of current rectifying and wave filtering circuit 26, just can provide battery 14 (please refer to Fig. 1) required direct voltage Vout2, then so that battery 14 is charged.

In some embodiment, transformer 25 can make the transformer of apparatus centre cap (center-tapped), and current rectifying and wave filtering circuit 26 can be made up of a plurality of diode D2, D3, inductance L 1 and capacitor C 4, but not as limit.

In sum, because charging circuit 2 of the present invention can be by the mutual conducting of the first switch element Q2 and the second switch element Q3 of switching device 24, make the primary side that circulates in transformer 25 that electric current can be two-way, therefore transformer 25 just is able to utilize fully in arbitrary cycle, makes the utilance of transformer 25 promote.Also therefore, under the condition that produces identical rechargeable energy, just the employed transformer cost of charging circuit that can be more known is low.In addition, also can reduce the problem of electromagnetic noise interference.

The present invention must be thought by the personnel Ren Shi craftsman of the technology of this area and be to modify as all, right neither scope of taking off as the desire protection of attached claim institute.

Claims (10)

1. a charging circuit is applied to non-interrupted power supply system, in order to the input of reception direct voltage, and is converted to required direct voltage output, and this charging circuit comprises at least:
Bleeder circuit receives the input of this direct voltage, and is a plurality of voltages with this direct voltage input dividing potential drop;
Switching device is connected with this bleeder circuit, and has a plurality of switch elements;
One transformer has primary side and primary side, and wherein an end of this primary side is connected in this switching device, and the other end of this primary side then is connected in this bleeder circuit;
Control device, this direct voltage output of sensing, and produce a plurality of control signals, with the staggered conducting of these a plurality of switch elements of controlling this switching device; And
Current rectifying and wave filtering circuit is connected in this primary side of this transformer, carries out rectification and filtering in order to the output voltage to this transformer, to obtain this direct voltage output.
2. charging circuit as claimed in claim 1 wherein also comprises compensating circuit, is connected between this primary side and this bleeder circuit of this transformer, and is equal in fact with the energy of this primary side of guaranteeing to circulate in this transformer.
3. charging circuit as claimed in claim 2, wherein this compensating circuit comprises electric capacity.
4. charging circuit as claimed in claim 1, wherein this charging circuit is the semibridge system transducer, this bleeder circuit is made up of at least two electric capacity, and this switching device comprises first switch element and second switch element, this first switch element and this second switch element be subjected to first control signal of this control device and the control of second control signal with staggered conducting with end.
5. charging circuit as claimed in claim 1 wherein also comprises current sensor, is connected in this control device, changes with this primary side and the electric current between this bleeder circuit that is used for this transformer of sensing.
6. non-interrupted power supply system, it comprises AC/DC converter, inverter, charging circuit, battery and DC-DC converter, it is characterized in that, this charging circuit comprises:
Bleeder circuit receives the direct voltage input, and is a plurality of voltages with this direct voltage input dividing potential drop;
Switching device is connected with this bleeder circuit, and has a plurality of switch elements;
Transformer has primary side and primary side, and wherein an end of this primary side is connected in this switching device, and the other end of this primary side then is connected in this bleeder circuit;
Current rectifying and wave filtering circuit is connected in this primary side of this transformer, carries out rectification and filtering in order to the output voltage to this transformer, to obtain direct voltage output; And
Control device, this direct voltage output of its sensing, and produce a plurality of control signals, with the staggered conducting of these a plurality of switch elements of controlling this switching device.
7. non-interrupted power supply system as claimed in claim 6, wherein this AC/DC converter is used for receiving the civil power alternating voltage, and converts this civil power alternating voltage to the direct current form; This charging circuit is connected with AC/DC converter, in order to receiving the direct voltage that AC/DC converter is exported, and converts this direct voltage to this required direct voltage output of this battery so that this battery is charged; This inverter is connected with this AC/DC converter, and the direct voltage of being exported after this DC-DC converter boosts with the direct voltage that is used for this AC/DC converter is exported or this cell voltage is converted to ac output voltage, to provide to load.
8. non-interrupted power supply system as claimed in claim 6, wherein this charging circuit also comprises compensating circuit, be connected between this primary side and this bleeder circuit of this transformer, equal in fact with the current energy of this primary side of guaranteeing to circulate in this transformer.
9. non-interrupted power supply system as claimed in claim 6, wherein this compensating circuit comprises electric capacity, this charging circuit is the semibridge system transducer, this bleeder circuit is made up of at least two electric capacity, and this switching device comprises first switch element and second switch element, this first switch element and this second switch element be subjected to first control signal of this control device and the control of second control signal with staggered conducting with end.
10. non-interrupted power supply system as claimed in claim 6, wherein this charging circuit also comprises current sensor, is connected in this control device, changes with this primary side and the electric current between this bleeder circuit that is used for this transformer of sensing.
CN2004100869352A 2004-10-20 2004-10-20 Charging circuit and uninterrupted power supply system using the same CN100407544C (en)

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Application Number Priority Date Filing Date Title
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CN100407544C true CN100407544C (en) 2008-07-30

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE0950168A1 (en) * 2009-03-18 2010-09-19 Electroengine In Sweden Ab A storage cell, a feeding device, an electric vehicle, and a method and a control system for controlling a storage package
KR20130078386A (en) * 2011-12-30 2013-07-10 엘에스산전 주식회사 Dc to dc converter for a charger of an electric vehicle
CN104786863B (en) * 2015-04-20 2017-03-01 吉林大学 A kind of automobile three voltage power system and its control method
CN106549453A (en) * 2016-12-09 2017-03-29 安科智慧城市技术(中国)有限公司 A kind of method that charging system former limit regulates and controls charging current

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Publication number Priority date Publication date Assignee Title
JPH1014131A (en) * 1996-06-21 1998-01-16 Hitachi Eng Co Ltd Uninterruptible power unit provided with dc output
CN1273705A (en) * 1998-08-07 2000-11-15 松下电器产业株式会社 Uninterruptible power system
JP2002325436A (en) * 2001-04-27 2002-11-08 Origin Electric Co Ltd Converter circuit
JP2002354799A (en) * 2001-05-25 2002-12-06 Tdk Corp Switching power supply
JP2003070245A (en) * 2001-08-23 2003-03-07 Tdk Corp Switching power supply
JP2003158873A (en) * 2001-11-20 2003-05-30 Tdk Corp Switching power unit
JP2003189622A (en) * 2001-12-19 2003-07-04 Shindengen Electric Mfg Co Ltd Switching power supply

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1014131A (en) * 1996-06-21 1998-01-16 Hitachi Eng Co Ltd Uninterruptible power unit provided with dc output
CN1273705A (en) * 1998-08-07 2000-11-15 松下电器产业株式会社 Uninterruptible power system
JP2002325436A (en) * 2001-04-27 2002-11-08 Origin Electric Co Ltd Converter circuit
JP2002354799A (en) * 2001-05-25 2002-12-06 Tdk Corp Switching power supply
JP2003070245A (en) * 2001-08-23 2003-03-07 Tdk Corp Switching power supply
JP2003158873A (en) * 2001-11-20 2003-05-30 Tdk Corp Switching power unit
JP2003189622A (en) * 2001-12-19 2003-07-04 Shindengen Electric Mfg Co Ltd Switching power supply

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