CN201146461Y - Power compensator without electrochemical capacitance - Google Patents
Power compensator without electrochemical capacitance Download PDFInfo
- Publication number
- CN201146461Y CN201146461Y CNU2007201308585U CN200720130858U CN201146461Y CN 201146461 Y CN201146461 Y CN 201146461Y CN U2007201308585 U CNU2007201308585 U CN U2007201308585U CN 200720130858 U CN200720130858 U CN 200720130858U CN 201146461 Y CN201146461 Y CN 201146461Y
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- Prior art keywords
- circuit
- power compensator
- electrolytic capacitor
- load
- capacitor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model relates to a power compensator without electrolytic capacitor, which belongs to the technical field of switch power supply. The power compensator consists of a bridge type rectifier circuit, wherein, current limiting capacitors are connected with the two input terminals of the bridge type rectifier circuit respectively; an electromagnetic energy recycle circuit consisting of a diode and a capacitor that are connected in parallel is connected with an output terminal of the bridge type rectifier circuit; a passive compensating circuit consisting of a first capacitor and a second capacitor that are connected in series is also connected with the output terminal of the bridge type rectifier circuit; a charging capacitor connected to one end of a load is extracted between the first and the second capacitors and is connected to the other end of the load by a semibridge switching circuit. The power compensating property of the circuit can still be realized by the utility model without the electrolytic capacitor. A test indicates that the power factor (Lambda or PF) can certainly be more than 0.90; the electric work efficiency Eta=P0/PIN is more or equal to 0.90; the supply current total harmonic THD is less or equal to 0.30. The power compensator has the advantages that problems of the electrolytic capacitor, of short service life big volume, low temperature limit, poor stability and reliability are avoided, which leads the power compensator to be obviously optimized and improved.
Description
Technical field
The utility model relates to a kind of power compensator, and especially a kind of improvement of power compensator belongs to the switch power technology field.
Background technology
In many occasions such as the AC/DC of Switching Power Supply conversion processes, in order to improve the power factor (representing with λ or PF) of input power supply, known effective measures are to be equipped with active power factor compensation (APFC) or passive power factor compensation (PPFC) device.And all need be with adopting electrochemical capacitor in the various power-factor compensators of prior art.Though the capacitance per unit volume amount of electrochemical capacitor is big, price is low, but also exist many weakness, as: the life-span is short, heatproof is low, can not bear reverse voltage, bear overvoltage capabilities low, bear high peak current and the effective value current capacity is low, the electrolyte chemical contamination is arranged, can not preserve for a long time etc.This makes it can't be applicable to " long-life ", " high temperature ", " pollution-free " in the application of power back-off circuit and is connected to the occasion that " high frequency content many power supply and loads " etc. has specific (special) requirements or high reliability request.
Retrieval is found, application number is that 97108900.0 Chinese patent application discloses a kind of passive power factor compensator, comprise a transformer T, this transformer T is by tri-phase iron core T1 and the winding W1 on each phase iron core column of tri-phase iron core T1 respectively, W2, W3, W4, W5, W6 form, around two windings, the number of turn of all windings all equates on each iron core column.Wherein played a reversed role by W1, W4 and form the A phase, played a reversed role by W3, W6 and form the B phase, played a reversed role by W5, W2 and form the C phase, the end of the same name of W2, W4, W6 connects together as mid point.It is introduced that device of the present invention can bring up to 0.96 with the power factor of equipment.Yet, analyze as can be known, said apparatus need adopt traditional power electronic device, and by winding, not only circuit structure is comparatively complicated, and not being suitable for DC power supply, also inapplicable supply frequency changes the occasion of (for example 50Hz/60Hz) and the variation of voltage fabric width, is difficult to satisfy the requirement with specific (special) requirements or high reliability request occasion.
The utility model content
The purpose of this utility model is: at the shortcoming of above prior art existence, propose a kind of reliable and stable and circuit structure is simple, the life-span is long no electrolytic capacitor power compensator, thereby be applicable to occasion with above-mentioned specific (special) requirements or high reliability request.
In order to reach above purpose, no electrolytic capacitor power compensator of the present utility model comprises bridge rectifier, the output of described bridge rectifier is connected to the Passively compensated circuit (PPFC) of series connection first electric capacity and second electric capacity formation, draw the charging capacitor that is connected to load one end between described first and second electric capacity, export through the half-bridge switch circuit simultaneously, connect the other end of load by the high frequency constant-current circuit of series capacitance and inductance formation, in order to when the load peak level is too high, to charge to second electric capacity, and cross when low when the load peak level, the first and second electric capacity parallel connections make bearing power change ratio less than the mains voltage variations ratio by the half-bridge switch circuit.
It is that two inputs of described bridge rectifier are connected to current limiting capacitance respectively that above no electrolytic capacitor power compensator further improves, and is used for providing electric current to load.
It is that the output of described bridge rectifier also is connected to the electromagnetic energy recovery circuit that parallel diode and energy storage capacitor constitute that above no electrolytic capacitor power compensator further improves, and is used for that electromagnetic energy with circuit is separately converted to direct current and alternating current component offers load.
Because the present invention is applied to high frequency switch power with " zero inventory " notion, and by high frequency switch power and phase bit tentering value electric charge, the equivalence electrochemical capacitor is stored the effect that electricity is filled up the voltage sag geometric area, thereby without electrochemical capacitor, still can realize the power back-off performance of circuit.Test shows, power factor (λ or PF) fully can be greater than 0.90; Electric work efficiency eta=P
0/ P
IN〉=0.90; The total harmonic wave THD of source current≤0.30.Avoided short, problems such as volume is big, the temperature limit is low, unstable, poor reliability of electrochemical capacitor life-span, made power compensator obviously be optimized and improve.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the structural representation of an embodiment of the utility model.
Embodiment
Embodiment one
The no electrolytic capacitor power compensator of present embodiment as shown in Figure 1, AC power live wire L and zero line N output electric energy, connect the DX4 bridge rectifier through common mode-differential mode filter module EMI, two inputs of bridge rectifier are connected to current limiting capacitance c φ 1, c φ 2 respectively, are used for providing electric current to load RH.Wherein electric capacity c φ 1, c φ 2 provide current component i φ 1, i φ 2 respectively.Because i φ 1, i φ 2 pile without the DX4 bridge, therefore be not subjected to the influence of bridge heap conduction voltage drop, thereby near " zero passage " effect that makes conventional bridge pile up the alternating current zero crossing ± be equivalent to during 1.2V open circuit significantly improves, the power supply input current harmonics obviously descends, and power factor (λ or PF) gets a promotion.
The output of bridge rectifier is connected to the electromagnetic energy recovery circuit of parallel diode D5 and energy storage capacitor c φ 3 formations, be used for circuit is comprised that the stray electrical magnetic energy that PCB distributes reclaims, the component that the D6 of diode D5 and lower end will be converted into direct current offers load RH, and energy storage capacitor c φ 3 offers load RH with alternating current component energy storage capacitor i φ 3.Like this, energy storage capacitor c φ 3 plays the effect of " electric capacity pump ", effective damping three times and above harmonic wave in the circuit.
The output of bridge rectifier also is connected to series connection first capacitor C 1 and second capacitor C 2 and the Passively compensated circuit that constitutes of two isolating diode D7, D9 therebetween, draw the charging capacitor c φ 4 that is connected to load RH one end between first and second electric capacity, form the effect of two-way " electric capacity pump ".Simultaneously, the output of bridge rectifier is through the half-bridge switch circuit output of NPN and PNP formation, the high frequency constant-current circuit that capacitor C S and inductance L S by series connection constitutes connects the other end of load RH, in order to when the load peak level is too high, charge to second capacitor C 2 by charging capacitor c φ 4, and cross when low when the load peak level, first capacitor C 1 and second capacitor C 2 are in parallel by the half-bridge switch circuit, increase the component of output electric energy, make bearing power change ratio less than the mains voltage variations ratio.
Different with conventional half-bridge switch circuit is, this circuit in the present embodiment has the function of active power compensation (APFC), its operation principle is: in NPN-PNP half-bridge switch process, the load total current contains active component i φ 1, i φ 2, i φ 3, i φ 4 etc., these current components are when the conducting of PNP pipe, electric energy is stored among the inductance L S, when the PNP pipe ends, because inductive current can not sport zero, so the discharging current of this inductance is from first and second capacitor C 1, the C2 discharge of NPN pipe diode connected in parallel to series connection, the actual effect of playing part A PFC.Situation when NPN manages conducting and ends can be analogized.Therefore, has the function of APFC during the half-bridge switch circuit working of present embodiment.
Test shows, the power factor of present embodiment (λ or PF) reaches more than 90%; Electric work efficiency eta=P
0/ P
IN〉=0.90; The total harmonic wave THD of source current≤0.30.Owing to avoided the employing electrochemical capacitor, therefore have the life-span long, volume is little, the warm limit for height of working, advantage such as stable, reliable make power compensator obviously be optimized and improve.
In addition to the implementation, the utility model can also have other execution modes.For example, can adopt MOSFET or IGBT to replace NPN-PNP half-bridge or full-bridge switch device etc.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of the utility model requirement.
Claims (6)
1, a kind of no electrolytic capacitor power compensator, comprise bridge rectifier, it is characterized in that: the output of described bridge rectifier is connected to the Passively compensated circuit of series connection first electric capacity and second electric capacity formation, draw the charging capacitor that is connected to load one end between described first and second electric capacity, export through the half-bridge switch circuit simultaneously, connect the other end of load by the high frequency constant-current circuit of series capacitance and inductance formation, in order to when the load peak level is too high, to charge to second electric capacity, and cross when low when the load peak level, the first and second electric capacity parallel connections make bearing power change ratio less than the mains voltage variations ratio by the half-bridge switch circuit.
2, according to the described no electrolytic capacitor power compensator of claim 1, it is characterized in that: two inputs of described bridge rectifier are connected to current limiting capacitance respectively, are used for providing electric current to load.
3, according to claim 1 or 2 described no electrolytic capacitor power compensators, it is characterized in that: the output of described bridge rectifier also is connected to the electromagnetic energy recovery circuit that parallel diode and energy storage capacitor constitute, and is used for that electromagnetic energy with circuit is separately converted to direct current and alternating current component offers load.
4, according to the described no electrolytic capacitor power compensator of claim 3, it is characterized in that: be serially connected with two isolating diodes between described first electric capacity and second electric capacity.
5, according to the described no electrolytic capacitor power compensator of claim 4, it is characterized in that: described half-bridge switch circuit adopts the NPN-PNP switching device.
6, according to the described no electrolytic capacitor power compensator of claim 4, it is characterized in that: described half-bridge switch circuit adopts the switch mosfet device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201308585U CN201146461Y (en) | 2007-12-07 | 2007-12-07 | Power compensator without electrochemical capacitance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201308585U CN201146461Y (en) | 2007-12-07 | 2007-12-07 | Power compensator without electrochemical capacitance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201146461Y true CN201146461Y (en) | 2008-11-05 |
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ID=40083347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201308585U Expired - Fee Related CN201146461Y (en) | 2007-12-07 | 2007-12-07 | Power compensator without electrochemical capacitance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201146461Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394556A (en) * | 2011-11-16 | 2012-03-28 | 上海能巍电气科技有限公司 | Charge power factor correction circuit |
| CN107078628A (en) * | 2014-10-15 | 2017-08-18 | 倍福自动化有限公司 | Have two semiconductor switch with the half-bridge of service load |
| CN107147280A (en) * | 2017-06-21 | 2017-09-08 | 山东超越数控电子有限公司 | A kind of support plate design method of improvement DC DC switch power supply EMIs |
-
2007
- 2007-12-07 CN CNU2007201308585U patent/CN201146461Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394556A (en) * | 2011-11-16 | 2012-03-28 | 上海能巍电气科技有限公司 | Charge power factor correction circuit |
| CN107078628A (en) * | 2014-10-15 | 2017-08-18 | 倍福自动化有限公司 | Have two semiconductor switch with the half-bridge of service load |
| CN107078628B (en) * | 2014-10-15 | 2020-02-04 | 倍福自动化有限公司 | Half-bridge with two semiconductor switches for operating a load |
| CN107147280A (en) * | 2017-06-21 | 2017-09-08 | 山东超越数控电子有限公司 | A kind of support plate design method of improvement DC DC switch power supply EMIs |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20110316 Granted publication date: 20081105 |
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| PD01 | Discharge of preservation of patent |
Date of cancellation: 20110422 Granted publication date: 20081105 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081105 Termination date: 20131207 |