CN112953264A - Bridgeless isolated switched capacitor SEPIC PFC converter - Google Patents
Bridgeless isolated switched capacitor SEPIC PFC converter Download PDFInfo
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- CN112953264A CN112953264A CN202110290901.9A CN202110290901A CN112953264A CN 112953264 A CN112953264 A CN 112953264A CN 202110290901 A CN202110290901 A CN 202110290901A CN 112953264 A CN112953264 A CN 112953264A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
- H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
- H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
- H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
- H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Dc-Dc Converters (AREA)
Abstract
本发明公开了一种无桥隔离型开关电容SEPIC PFC变换器，其拓扑结构采用两个功率开关管、一个电感和一个变压器、五个二极管和四个电容组成，采用无桥拓扑结构，半导体损耗低。此外，通过把电感换成一个变压器，不仅具有隔离作用，利用变压器漏感，还可以有效地降低变换器中的电流尖峰。本发明高增益无桥开关电容SEPIC PFC变换器可产生极高的功率因数，低浪涌电流，利于降低变换器成本，满足IEC 61000‑3‑2标准要求。
The invention discloses a bridgeless isolation switch capacitor SEPIC PFC converter. Its topology structure is composed of two power switch tubes, an inductor and a transformer, five diodes and four capacitors. Low. In addition, by replacing the inductance with a transformer, it not only has an isolation effect, but also can effectively reduce the current spike in the converter by utilizing the leakage inductance of the transformer. The high-gain bridgeless switched capacitor SEPIC PFC converter of the present invention can generate extremely high power factor and low surge current, which is beneficial to reduce the cost of the converter and meets the requirements of the IEC 61000‑3‑2 standard.
Description
Technical Field
The invention relates to power factor correction circuit equipment of a power supply system, in particular to a bridge-free isolated switched capacitor SEPIC PFC converter, which is applied to the technical field of power supply systems.
Background
Power Factor Correction (PFC) converters are widely used in Power supply systems of single-phase Power electronic devices. The SEPIC PFC is popular because of its advantages such as low inrush current, continuous input current, and high power factor. However, the conventional SEPIC PFC converter has a low voltage gain and is difficult to apply to a high voltage field. In order to improve the voltage gain of the conventional SEPIC PFC converter, a conventional switched capacitor SEPIC PFC converter with high voltage gain is proposed in the literature (e.h. island, m.a. al-safar, a.j.sabzali and a.a.fardoun, "a family of single-switch PWM converters with high-up conversion ratio," IEEE trans.circuits system.i, reg.papers, vol.55, No.4, pp.1159-1171, May 2008), as shown in fig. 1. However, the semiconductor devices in their topology have high conduction losses and the switched capacitor cells generate significant current spikes. The repetitive current spikes may increase the current stress and noise of the semiconductor. Especially in high power applications, excessive repetitive current spikes can damage the semiconductor device. This is a technical problem to be solved.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to overcome the defects in the prior art and provide a bridge-free isolated switched capacitor SEPIC PFC converter which adopts a bridge-free topological structure and has low semiconductor loss. In addition, the inductor is replaced by the transformer, so that the isolation effect is achieved, and the current spike in the converter can be effectively reduced by utilizing the leakage inductance of the transformer. In addition, the high-gain bridgeless switched capacitor SEPIC PFC converter can generate extremely high power factor and low surge current, and meets the requirements of IEC 61000-3-2 standard.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme:
a bridge-free isolated switched capacitor SEPIC PFC converter is characterized in that a topological structure of the converter is composed of two power switch tubes, an inductor, a transformer, five diodes and four capacitors; the two power switch tubes are respectively a first switch tube and a second switch tube; the five diodes are respectively a first diode, a second diode, a third diode, a fourth diode and a fifth diode; the four capacitors are respectively a first capacitor, a second capacitor, a third capacitor and a fourth capacitor;
one end of the inductor is connected with an input alternating current power supply, and the other end of the inductor is connected with the common end of the first diode and the second diode;
one end of the first diode is connected with the common end of the inductor and the second diode, and the other end of the first diode is connected with the common end of the first switch tube and the first capacitor;
one end of a second diode is connected with the common end of the inductor and the first diode, and the other end of the second diode is connected with the common end of a second switching tube and the primary winding of the transformer;
one end of the first switch tube is connected with the common end of the input voltage source and the second switch tube, and the other end of the first switch tube is connected with the common end of the first diode and the first capacitor;
one end of the second switching tube is connected with the common end of the input voltage source and the first switching tube, and the other end of the second switching tube is connected with the common end of the second diode and the primary winding of the transformer;
one end of a first capacitor is connected with the common end of the first diode and the first switch tube, and the other end of the first capacitor is connected with the primary winding of the transformer;
one end of a second capacitor is connected with a common end of a third diode and a secondary winding of the transformer, and the other end of the second capacitor is connected with a common end of a fourth diode and a fifth diode;
one end of a third diode is connected with the common end of the secondary winding of the transformer and the second capacitor, and the other end of the third diode is connected with the common ends of the third capacitor, the fourth capacitor and the load;
one end of a fourth diode is connected with the common end of the secondary winding of the transformer and the third capacitor, and the other end of the fourth diode is connected with the common end of the second capacitor and the fifth diode;
one end of a third capacitor is connected with a common end of a fourth diode and a secondary winding of the transformer, and the other end of the third capacitor is connected with common ends of the third diode, the fourth capacitor and the load;
one end of a fifth diode is connected with the common end of the second capacitor and the fourth diode, and the other end of the fifth diode is connected with the fourth capacitor and the load;
one end of the fourth capacitor is connected with the fifth diode and the load, and the other end of the fourth capacitor is connected with the third capacitor, the third diode and the common end of the load.
Preferably, the two switching tubes are controlled by the same control signal.
Compared with the prior art, the invention has the following obvious and prominent substantive characteristics and remarkable advantages:
1. compared with the traditional isolated switched capacitor SEPIC PFC converter, the isolated switched capacitor SEPIC PFC converter has the advantages that the switching tube is used for replacing a diode, an input end rectifier bridge is eliminated, lower conduction loss of a semiconductor device can be realized, and higher efficiency is realized;
2. compared with the traditional SEPIC PFC converter, the power supply has higher voltage gain by embedding the switch capacitor unit;
3. the input end of the invention replaces a diode by two switching tubes, thus realizing a bridgeless structure and further improving the efficiency of the converter system; the circuit of the invention adopts a high-frequency transformer, which not only plays an isolation role, but also can effectively reduce the current peak generated by the switched capacitor by utilizing the leakage inductance of the transformer; the converter cost is favorably reduced.
Drawings
Fig. 1 is a topology structure diagram of a conventional isolated switched capacitor SEPIC PFC converter.
FIG. 2 is a topological structure diagram of the bridgeless isolated switched capacitor SEPIC PFC converter.
Detailed Description
The above-described scheme is further illustrated below with reference to specific embodiments, which are detailed below:
the first embodiment is as follows:
in this embodiment, referring to fig. 2, a bridge-less isolated switched capacitor SEPIC PFC converter has a topology structure including two power switching tubes, an inductor L, a transformer T, five diodes, and four capacitors; the two power switch tubes are respectively a first switch tube S1And a second switching tube S2(ii) a Five diodes are respectively the first diode D1A second diode D2A third diode D3A fourth diode D4And a fifth diode D5(ii) a The four capacitors are respectively first capacitors C1A second capacitor C2A third capacitor C3And a fourth capacitance C0；
Wherein, one end of the inductor L is connected with the input AC power supply VinConnected to the other end of the inductor L via a first diode D1And a second diode D2Are connected with each other;
first diode D1With an end of an inductor L and a second diode D2Are connected with a common terminal, a first diode D1The other end and the first switch tube S1And a first capacitor C1Are connected with each other;
second diode D2One terminal connected to the inductor L and the first diode D1Are connected with a common terminal of a second diode D2The other end and a second switch tube S2Is connected with the common end of the primary winding of the transformer T;
first switch tube S1One terminal and input voltage source VinAnd a second switching tube S2Is connected with the common end of the first switch tube S1The other end and the first diode D1And a first capacitor C1Are connected with each other;
a second switch tube S2One terminal and input voltage source VinAnd a first switching tube S1Is connected with the common end of the first switch tube S2The other end of the diode is connected with a second diode D2Is connected with the common end of the primary winding of the transformer T;
a first capacitor C1One terminal and a first diode D1And a first switching tube S1Are connected with a first capacitor C1The other end is connected with a primary winding of a transformer T;
second capacitor C2One terminal and a third diode D3A second capacitor C connected to a common terminal of the secondary winding of the transformer T2The other end of the diode is connected with a fourth diode D4And a fifth diode D5Are connected with each other;
third diode D3With one end of the transformer T and the secondary winding of the transformer T and the second capacitor C2Are connected, a third diode D3The other end and a third capacitor C3And a fourth capacitance C0And the common ends of the loads R are connected;
fourth diode D4With one end of the transformer T and the secondary winding of the transformer T and the third capacitor C3Are connected, a fourth diode D4The other end and a second capacitor C2And a fifth diode D5Are connected with each other;
third capacitor C3And a fourth diode D4A third capacitor C connected to a common terminal of the secondary winding of the transformer T3The other end of the diode is connected with a third diode D3A fourth capacitor C0Is connected with the common end of the load R;
fifth diode D5And a second capacitor C2And a fourth diode D4Are connected, a fifth diode D5The other end of the capacitor is connected with a fourth capacitor C0Is connected with a load R;
fourth capacitor C0One terminal and a fifth diode D5A fourth capacitor C connected with the load R0The other end and a third capacitor C3A third diode D3And to a common terminal of a load R.
The embodiment is a bridge-free isolated switched capacitor SEPIC PFC converter with high efficiency and high voltage gain, and the topological structure of the converter is composed of two power switch tubes, an inductor, a transformer, five diodes and four capacitors. Compared with the conventional isolated switched capacitor SEPIC PFC converter, the bridgeless isolated switched capacitor SEPIC PFC converter has the following advantages: the input end is provided with two switching tubes to replace diodes, so that a bridgeless structure is realized, and the efficiency of a converter system is improved; and the circuit adopts a high-frequency transformer, so that the isolation effect is achieved, and the current peak generated by the switched capacitor can be effectively reduced by using the leakage inductance of the transformer. The high-gain bridgeless switched capacitor SEPIC PFC converter can generate extremely high power factor and low surge current and meets the requirements of IEC 61000-3-2 standard.
Example two:
this embodiment is substantially the same as the first embodiment, and is characterized in that:
in this embodiment, the two switching tubes are controlled by the same control signal. The switch tube is used for replacing a diode, a bridge-free structure is realized, the efficiency of the converter system is improved, and the control strategy is simplified.
The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the embodiments, and various changes and modifications can be made according to the purpose of the invention, and any changes, modifications, substitutions, combinations or simplifications made according to the spirit and principle of the technical solution of the present invention shall be equivalent substitutions, as long as the purpose of the present invention is met, and the present invention shall fall within the protection scope of the present invention without departing from the technical principle and inventive concept of the present invention.
Claims (2)
1. A no bridge isolated form switched capacitor SEPIC PFC converter which characterized in that: the topological structure of the power amplifier consists of two power switching tubes, an inductor (L), a transformer (T), five diodes and four capacitors; the two power switch tubes are respectively the first switch tube (S)1) And a second switching tube (S)2) (ii) a Five diodes are respectively the first diode (D)1) A second diode (D)2) A third diode (D)3) A fourth diode (D)4) And a fifth diode (D)5) (ii) a The four capacitors are respectively the first capacitor (C)1) A second capacitor (C)2) A third capacitor (C)3) And a fourth capacitance (C)0)；
Wherein, one end of the inductor (L) is connected with the input AC power supply (V)in) Connected to the other end of the inductor (L) via a first diode (D)1) And a second diode (D)2) Are connected with each other;
a first diode (D)1) With an inductor (L) and a second diode (D)2) Are connected to a common terminal, a first diode (D)1) The other end and the first switchPipe (S)1) And a first capacitance (C)1) Are connected with each other;
second diode (D)2) One terminal connected to the inductor (L) and the first diode (D)1) Are connected, a second diode (D)2) The other end is connected with a second switch tube (S)2) Is connected to a common terminal of the primary winding of the transformer (T);
a first switch tube (S)1) One terminal and an input voltage source (V)in) And a second switching tube (S)2) Is connected with the common end of the first switch tube (S)1) The other end and a first diode (D)1) And a first capacitance (C)1) Are connected with each other;
a second switch tube (S)2) One terminal and an input voltage source (V)in) And a first switch tube (S)1) Is connected with the common end of the first switch tube (S)2) The other end is connected with a second diode (D)2) Is connected to a common terminal of the primary winding of the transformer (T);
a first capacitor (C)1) One terminal and a first diode (D)1) And a first switch tube (S)1) Are connected to a first capacitor (C)1) The other end is connected with a primary winding of the transformer (T);
a second capacitance (C)2) One terminal and a third diode (D)3) A second capacitor (C) connected to a common terminal of the secondary winding of the transformer (T)2) The other end is connected with a fourth diode (D)4) And a fifth diode (D)5) Are connected with each other;
third diode (D)3) With one end of the secondary winding of the transformer (T) and a second capacitor (C)2) Are connected, a third diode (D)3) The other end and a third capacitor (C)3) And a fourth capacitance (C)0) And a common terminal of the load (R) is connected;
fourth diode (D)4) With one end of the transformer (T) and with the secondary winding of the transformer (T) and with the third capacitor (C)3) Are connected, a fourth diode (D)4) The other end and a second capacitor (C)2) And a fifth diode (D)5) Are connected with each other;
third capacitor(C3) And a fourth diode (D)4) A third capacitor (C) connected to a common terminal of the secondary winding of the transformer (T)3) The other end is connected with a third diode (D)3) A fourth capacitor (C)0) Connected to a common terminal of a load (R);
fifth diode (D)5) And a second capacitor (C)2) And a fourth diode (D)4) Are connected, a fifth diode (D)5) The other end and a fourth capacitor (C)0) Is connected with a load (R);
fourth capacitance (C)0) One terminal and a fifth diode (D)5) A fourth capacitor (C) connected to the load (R)0) The other end and a third capacitor (C)3) A third diode (D)3) And to a common terminal of a load (R).
2. The bridgeless isolated switched capacitor SEPIC PFC converter of claim 1, wherein: the two switching tubes are controlled by the same control signal.
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| CN202110290901.9A CN112953264A (en) | 2021-03-18 | 2021-03-18 | Bridgeless isolated switched capacitor SEPIC PFC converter |
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| CN202110290901.9A CN112953264A (en) | 2021-03-18 | 2021-03-18 | Bridgeless isolated switched capacitor SEPIC PFC converter |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190199202A1 (en) * | 2015-07-21 | 2019-06-27 | Christopher Donovan Davidson | Single stage isolated ac/dc power factor corrected converter |
| CN110012574A (en) * | 2019-04-19 | 2019-07-12 | 福州大学 | A hybrid control single-stage bridgeless Sepic and LLC LED driver circuit |
| CN112003485A (en) * | 2020-09-07 | 2020-11-27 | 国网福建省电力有限公司电力科学研究院 | Current continuous control method based on bridgeless SEPIC-PFC circuit |
-
2021
- 2021-03-18 CN CN202110290901.9A patent/CN112953264A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190199202A1 (en) * | 2015-07-21 | 2019-06-27 | Christopher Donovan Davidson | Single stage isolated ac/dc power factor corrected converter |
| CN110012574A (en) * | 2019-04-19 | 2019-07-12 | 福州大学 | A hybrid control single-stage bridgeless Sepic and LLC LED driver circuit |
| CN112003485A (en) * | 2020-09-07 | 2020-11-27 | 国网福建省电力有限公司电力科学研究院 | Current continuous control method based on bridgeless SEPIC-PFC circuit |
Non-Patent Citations (2)
| Title |
|---|
| ESAM H.ISMAIL,等: ""A Family of Single-Switch PWM Converters With High Step-Up Conversion Ratio"", 《IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS》 * |
| PAULO JUNIOR SILVA COSTA,等: ""Single-Phase Hybrid Switched-Capacitor Voltage-Doubler SEPIC PFC Rectifiers"", 《IEEE TRANSACTIONS ON POWER ELECTRONICS》 * |
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Application publication date: 20210611 |