CN201947169U - Stagger active PFC (power factor correction) circuit of inverter air conditioner - Google Patents
Stagger active PFC (power factor correction) circuit of inverter air conditioner Download PDFInfo
- Publication number
- CN201947169U CN201947169U CN2010206657940U CN201020665794U CN201947169U CN 201947169 U CN201947169 U CN 201947169U CN 2010206657940 U CN2010206657940 U CN 2010206657940U CN 201020665794 U CN201020665794 U CN 201020665794U CN 201947169 U CN201947169 U CN 201947169U
- Authority
- CN
- China
- Prior art keywords
- pfc
- power factor
- active pfc
- circuit
- circuits
- 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.)
- Expired - Fee Related
Links
- 238000006243 chemical reaction Methods 0.000 claims 1
- 239000003990 capacitor Substances 0.000 abstract description 9
- 230000001939 inductive effect Effects 0.000 abstract description 4
- 229920006926 PFC Polymers 0.000 description 30
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Rectifiers (AREA)
Abstract
The utility model relates to a stagger active PFC (power factor correction) circuit of an inverter air conditioner, which provides a novel full wave active PFC scheme. Two small PFC branch circuits connected in parallel work in a positive half-wave period and a negative half-wave period of alternating current respectively, thereby effectively reducing the volume and noise of reactors and simultaneously reducing capacities of direct electrolytic capacitors. The stagger active PFC circuit is provided with bridge rectifiers connected to two ends of an alternating current power supply in parallel and a pair of two-way power factor branch circuits. Current input end and output end of the two-way power factor branch circuits are overlaid, and a phase difference of the two-way factor branch circuits is 180 degrees. Two small PFC circuits are arranged at the position where a single bigger PFC circuit is disposed originally. The two small PFC circuits with halved power are connected in parallel, and the input end and the output end of the two small PFC circuits are overlaid, thereby reducing input current ripples and output current ripples caused by two inductive currents.
Description
Technical Field
The utility model provides a be applied to inverter air conditioner's active PFC circuit of alternating expression belongs to the domestic appliance field.
Background
Due to the use of low-carbon environmental protection technology, the cognition degree of consumers on the high-energy-efficiency variable-frequency air conditioner is continuously improved, and the domestic variable-frequency air conditioner is rapidly popularized.
The PFC factor correction technology for forming the driving board of the variable-frequency air conditioner is mainly divided into the technical types of passive PFC, partial active PFC and full-wave active PFC.
The passive PFC technology has the defects of difficult harmonic wave passing, large element volume and the like;
the volume of part of the active PFC is still larger, and a larger installation space is needed;
full-wave active PFCs exist at low efficiency because they do not start during the positive half-wave or negative half-wave cycle of the ac. In addition, such PFC reactors have high noise and require an electrolytic capacitor having a large capacity.
This patent application is made in view of this.
SUMMERY OF THE UTILITY MODEL
Active PFC circuit of inverter air conditioner alternating expression, its design aim at solve the problem that above-mentioned prior art exists and propose a novel active PFC scheme of full wave to two parallelly connected little power factor correction branch roads of each other work respectively in the positive half-wave of alternating current, burden half-wave cycle, realize reducing reactor volume and noise effectively under high switching frequency operating condition, reduce the capacity of direct current electrolytic capacitor simultaneously.
In order to achieve the above design purpose, the interleaved active PFC circuit of the inverter air conditioner comprises:
a bridge rectifier and a group of 2-path power factor branches are connected in parallel at two ends of an alternating current power supply. Wherein,
the current input end and the output end of the 2-path power factor branch circuit are mutually overlapped,
the phase difference of the 2 power factor branches is 180 degrees.
According to the characteristics of the basic scheme, 2 small power factor branches which are connected in parallel and have half-reduced power and overlapped input ends and output ends are arranged at the original position where a single large power factor correction circuit is placed, and the 2 small power factor branches work in the positive half-wave period and the negative half-wave period of alternating current respectively with the phase difference of 180 degrees, so that input current ripples and output current ripples caused by two inductive currents can be reduced.
In a further improvement, a boosting inductor and a power IGBT are connected in series in each power factor branch.
As above, the staggered active PFC circuit of the inverter air conditioner of the present invention has the advantages of:
1. a novel full-wave active PFC technical scheme is realized, and the volume and noise of a reactor can be reduced under the working state of high switching frequency.
2. Since the noise of the reactor can be reduced without arranging an electrolytic capacitor with a larger capacity, the whole drive board can be reduced to achieve the design purpose of miniaturization.
3. Based on the characteristics of the full-wave active PFC technology, high efficiency is realized in the full cycle of alternating current, and the use power can be increased to 4kW so as to be applied to a high-power variable-frequency air conditioner controller.
Drawings
The present invention will now be further described with reference to the accompanying drawings
FIG. 1 is a schematic diagram of an interleaved active PFC circuit of the inverter air conditioner;
fig. 2 is a graph of different types of PFC power versus time.
Detailed Description
a bridge rectifier and a group of 2-path power factor branches are connected in parallel at two ends of an alternating current power supply,
the current input end and the output end of the 2 power factor branches are mutually overlapped, and the phase difference of the 2 power factor branches is 180 degrees.
The boost inductor L1 and the power IL1 are connected in series in one power factor branch, and the boost inductor L2 and the power IL2 are connected in series in the other power factor branch.
As shown in fig. 2, the inductor energy EsL required by the conventional single-stage active PFC is
For the same power level, if the same inductance value is used in both designs, the total inductance energy required for the interleaved active PFC is only half that of a single stage, i.e., one stage
Compared with the existing single-stage active PFC, the staggered active PFC can reduce the total inductance energy required by the design by 50% at most.
The reduced inductive power of interleaved active PFC can reduce the magnet volume by up to 32%. Compared with a single-stage active PFC structure, the high-frequency output capacitor of the staggered active PFC has the root mean square current less than 50% of that of the high-frequency output capacitor, and the root mean square current of a large-capacity capacitor is reduced. The RMS current reduction of the high frequency boost capacitor can reduce the number of boost capacitors by up to 25%.
Conduction loss P of single-stage active PFCCSIs composed of
PCS=I2R
Overall conduction loss for interleaved active PFCPCIIs composed of
From the above formula
Compared with a single-stage active PFC, the staggered active PFC can reduce the conduction loss by 50% at most.
During the operation of the single-phase CCM PFC circuit under light load and heavy load, the power factor is maintained at about 0.95.
Under the condition that 2 branches with 180-degree phase difference work alternately, the interleaved active PFC circuit can maintain the power factor to be more than 0.98 within the range of more than 700W of heavy load.
Claims (2)
1. The utility model provides a frequency conversion air conditioner alternating active PFC circuit which characterized in that: a bridge rectifier and a group of 2 power factor branches are connected in parallel at two ends of an alternating current power supply, the current input end and the current output end of the 2 power factor branches are mutually overlapped, and the phase difference of the 2 power factor branches is 180 degrees.
2. The interleaved active PFC circuit of claim 1, wherein: in each power factor branch circuit, a boosting inductor and a power IGBT are connected in series.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010206657940U CN201947169U (en) | 2010-12-17 | 2010-12-17 | Stagger active PFC (power factor correction) circuit of inverter air conditioner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010206657940U CN201947169U (en) | 2010-12-17 | 2010-12-17 | Stagger active PFC (power factor correction) circuit of inverter air conditioner |
Publications (1)
Publication Number | Publication Date |
---|---|
CN201947169U true CN201947169U (en) | 2011-08-24 |
Family
ID=44474505
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2010206657940U Expired - Fee Related CN201947169U (en) | 2010-12-17 | 2010-12-17 | Stagger active PFC (power factor correction) circuit of inverter air conditioner |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN201947169U (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102445605A (en) * | 2011-12-06 | 2012-05-09 | 海信(山东)空调有限公司 | Reactor noise testing device and method |
CN104113202A (en) * | 2014-07-23 | 2014-10-22 | 珠海格力电器股份有限公司 | Two-way staggered PFC current balance circuit and air conditioner |
CN108718152A (en) * | 2018-06-13 | 2018-10-30 | 广东美的制冷设备有限公司 | Interleaved PFC control circuit and motor-drive circuit |
CN110311544A (en) * | 2019-07-26 | 2019-10-08 | 广东美的制冷设备有限公司 | Over-current protection method, compressor control device and air conditioner |
-
2010
- 2010-12-17 CN CN2010206657940U patent/CN201947169U/en not_active Expired - Fee Related
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102445605A (en) * | 2011-12-06 | 2012-05-09 | 海信(山东)空调有限公司 | Reactor noise testing device and method |
CN102445605B (en) * | 2011-12-06 | 2014-05-21 | 海信(山东)空调有限公司 | Reactor noise testing device and method |
CN104113202A (en) * | 2014-07-23 | 2014-10-22 | 珠海格力电器股份有限公司 | Two-way staggered PFC current balance circuit and air conditioner |
CN108718152A (en) * | 2018-06-13 | 2018-10-30 | 广东美的制冷设备有限公司 | Interleaved PFC control circuit and motor-drive circuit |
CN110311544A (en) * | 2019-07-26 | 2019-10-08 | 广东美的制冷设备有限公司 | Over-current protection method, compressor control device and air conditioner |
CN110311544B (en) * | 2019-07-26 | 2020-10-09 | 广东美的制冷设备有限公司 | Overcurrent protection method, compressor control device and air conditioner |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8723487B2 (en) | Zero voltage switching interleaved boost AC/DC converter | |
CN103187879B (en) | Bidirectional direct current converter based on immittance network, and digital control system and method of bidirectional direct current converter | |
Lai et al. | A single-stage AC/DC converter based on zero voltage switching LLC resonant topology | |
CN1428924A (en) | Switch power supply device | |
CN201766508U (en) | Single-phase single-pole full-bridge isolated power factor correction converter | |
CN103762873B (en) | Based on the high frequency isolation type three-level inverter of Boost | |
Siwakoti et al. | Power electronics converters—An overview | |
CN101621247A (en) | Power factor correction circuit | |
CN103607108A (en) | Transformer primary side multi-stage passive clamp circuit of full-bridge single-stage power factor corrector | |
CN201947169U (en) | Stagger active PFC (power factor correction) circuit of inverter air conditioner | |
CN108235509A (en) | A kind of single-stage LED drive circuit of integrated decompression Cuk and LLC circuits | |
CN102347697B (en) | Direct DC-AC (direct current-alternating current) converting circuit for low-voltage input full bridge inverter | |
CN202918023U (en) | Battery management power module | |
CN102832828A (en) | Magnetic combined three-phase input AC (Alternating Current)/DC (Direct Current) full-bridge high frequency converter | |
CN101340143A (en) | Switch converter of high power factor | |
CN102983738A (en) | Primary voltage buffer type full-bridge single-stage power-factor corrector of transformer | |
CN201198066Y (en) | Main circuit topological structure of inverter submerged arc welding power supply | |
CN102263513A (en) | AC-DC isolated conversion circuit | |
CN209072370U (en) | A kind of single phase bidirectional AC-DC charge-discharge circuit | |
Baharom et al. | Computer simulation model and performance analysis of high power factor three-phase AC-DC current injection hybrid resonant converter | |
CN102969880B (en) | Second ripple removing circuit of single-phase voltage-type convertor | |
CN105429452A (en) | Common-mode rejection dual-Boost bridgeless PFC converter | |
CN113659863B (en) | Double-end common-ground inverter | |
CN201781429U (en) | Low-voltage input direct DC-AC conversion circuit adopting full-bridge inversion | |
CN215344368U (en) | Novel power factor conversion circuit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20171217 |