CN112953263A - Negative output high-gain bridgeless switched capacitor SEPIC PFC converter - Google Patents
Negative output high-gain bridgeless switched capacitor SEPIC PFC converter Download PDFInfo
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- CN112953263A CN112953263A CN202110289249.9A CN202110289249A CN112953263A CN 112953263 A CN112953263 A CN 112953263A CN 202110289249 A CN202110289249 A CN 202110289249A CN 112953263 A CN112953263 A CN 112953263A
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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
-
- 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)
Abstract
The invention discloses a negative output high-gain bridgeless switched capacitor SEPICPFC converter, which adopts a topological structure consisting of two power switch tubes, three inductors, five diodes and four capacitors. Meanwhile, the switching tube is adopted to replace a diode, and lower conduction loss can be realized. Therefore, the invention can realize higher efficiency compared with the conventional SEPIC converter with bridge switch capacitor at negative output. The invention can thoroughly eliminate the current spike problem of the traditional bridge switch capacitor SEPIC converter by embedding a small inductor at the output end, thereby being beneficial to using a semiconductor device with lower stress and reducing the cost of the converter.
Description
Technical Field
The invention relates to power factor correction circuit equipment of a power supply system, in particular to a bridge-free switched capacitor SEPICPFC converter, which is applied to the technical field of power supply systems.
Background
A Power Factor Correction (PFC) converter is an essential component of a rectified Power supply. The SEPIC PFC converter has the advantages of continuous input and output current, low surge current and the like, and is widely applied. However, the conventional SEPIC PFC converter has a low voltage gain and is difficult to apply to a high voltage field. Therefore, in order to improve the voltage gain of the conventional SEPI C PFC converter, a conventional negative output bridge-connected switched capacitor SEPIC PFC converter 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-step-up conversion ratio," IE EE trans.circuits system.i, reg.papers, vol.55, No.4, pp.1159-1171, May 2008), as shown in fig. 1. The converter can effectively improve the voltage gain by embedding the switched capacitor unit. However, this converter still has two drawbacks:
firstly, the diode rectifier bridge is adopted, the conduction loss of a semiconductor device is large, and the efficiency is not high;
secondly, the switch capacitor unit can generate current peak, which is easy to damage the switch 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 provides a negative-output high-gain bridge-free switched capacitor SEPICPFC converter. Meanwhile, the switching tube is adopted to replace a diode, and lower conduction loss can be realized. Therefore, the invention can realize higher efficiency compared with the conventional SEPIC converter with bridge switch capacitor at negative output. The invention can thoroughly eliminate the current spike problem of the SEPIC converter with the traditional bridge switch capacitor by embedding a small inductor at the output end.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme:
a negative output high gain bridgeless switched capacitor SEPICPFC converter comprises a topological structure which is composed of two power switch tubes, three inductors, five diodes and four capacitors; the two power switch tubes are respectively a first switch tube and a second switch tube; the three inductors are respectively a first inductor, a second inductor and a third inductor; 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 first inductor is connected with an input alternating current power supply, and the other end of the first 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 first 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 first inductor and the first diode, and the other end of the second diode is connected with the common end of a fourth diode, a third capacitor, a second inductor and a second switching tube;
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, the fourth diode, the second inductor and the third capacitor;
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 common end of the second inductor, the third diode and the second capacitor;
one end of a second inductor is connected with the common end of the first capacitor, the third diode and the second capacitor, and the other end of the second inductor is connected with the common end of the second switching tube, the fourth diode, the second diode and the third capacitor;
one end of the second capacitor is connected with the common end of the first capacitor, the second inductor and the third diode, and the other end of the second capacitor is connected with the common end of the fifth diode and the fourth diode;
one end of a third diode is connected with the common end of the first capacitor, the second capacitor and the second inductor, and the other end of the third diode is connected with the common end of the third capacitor and the third inductor;
one end of a third capacitor is connected with the common end of the second diode, the fourth diode, the second switching tube and the second inductor, and the other end of the third capacitor is connected with the common end of the third diode and the third inductor;
one end of a fourth diode is connected with the common end of the second diode, the second switching tube, the second inductor 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 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 a third inductor is connected with a third capacitor and a third diode, and the other end of the third inductor is connected with a fourth capacitor and a load;
one end of a fourth capacitor is connected with the fifth diode and the load, and the other end of the fourth capacitor is connected with the third inductor and the load;
alternatively, a third inductor is used in series with a fifth diode.
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 SEPIC PFC converter with the bridge negative output switch capacitor, the invention is the bridge-free SEPIC PFC converter with the negative output switch capacitor, and the number of semiconductor devices on a current circulation path is effectively reduced by eliminating an input end diode rectifier bridge; according to the invention, 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 further realized;
2. compared with the traditional SEPIC PFC converter, the power supply has higher voltage gain by embedding the switch capacitor unit;
3. the circuit topology structure is simple, the same topology works under the positive half period and the negative half period, and the power density advantage is achieved;
4. compared with the conventional SEPIC PFC converter with the bridge switched capacitor, the invention can effectively inhibit the current spike generated by the switched capacitor by connecting the small inductor Ls in series at the output end, thereby being beneficial to using a semiconductor device with lower stress and reducing the cost of the converter.
Drawings
Fig. 1 is a topology structure diagram of a conventional bridge negative output switched capacitor SEPIC PFC converter.
Fig. 2 is a topology structure diagram of the negative output switched capacitor bridgeless SEPIC PFC converter of the present invention.
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 negative output high-gain bridgeless switched capacitor SEPIC PFC converter has a topology structure including two power switching tubes, three inductors, five diodes, and four capacitors; the two power switch tubes are respectively a first switch tube S1And a second switching tube S2(ii) a The three inductors are respectively the first inductor L1A second inductor L2And a third inductance LS(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, the first inductance L1One end of (1) and an input AC power supply VinConnected to a first inductor L1And the other end of the first diode D1And a second diode D2Are connected with each other;
first diode D1One end of (1) and the first inductor L1And a second diode D2Are connected with each otherConnected to a first diode D1And the other end of the first switch tube S1And a first capacitor C1Are connected with each other;
second diode D2One terminal and the first inductor L1And a first diode D1Are connected with a common terminal of a second diode D2The other end of the diode is connected with a fourth diode D4A third capacitor C3A second inductor L2And a second switching tube S2Are connected with each other;
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 D2A fourth diode D4A second inductor L2And a third capacitance C3Are connected with each other;
a first capacitor C1One terminal and a first diode D1And a first switching tube S1Are connected with a first capacitor C1The other end and the second inductor L2A third diode D3And a second capacitor C2Are connected with each other;
second inductance L2And a first capacitor C1A third diode D3And a second capacitor C2Are connected with the common terminal of the second inductor L2The other end and a second switch tube S2A fourth diode D4A second diode D2And a third capacitance C3Are connected with each other;
second capacitor C2One terminal and the first capacitor C1A second inductor L2And a third diode D3Are connected with a second capacitor C2The other end of the diode is connected with a fifth diode D5And a fourth diode D4Are connected with each other;
third diode D3And a first capacitor C1A second capacitor C2And a second inductance L2Are connected, a third diode D3The other end and a third capacitor C3And a third inductance LSAre connected with each other;
third capacitor C3And a second diode D2A fourth diode D4A second switch tube S2And a second inductance L2Are connected to a third capacitor C3The other end of the diode is connected with a third diode D3And a third inductance LSAre connected with each other;
fourth diode D4And a second diode D2A second switch tube S2A second inductor L2And a third capacitance C3Are connected, a fourth diode D4The other end and a second capacitor C2And a fifth diode D5Are connected with each other;
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;
third inductance LSAnd a third capacitor C3And a third diode D3Connected, third inductance LSThe 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 inductor LSIs connected with a load R;
or, the third inductance LSAnd a fifth diode D5Are used in series.
The high-efficiency high-voltage-gain negative output bridgeless SEPIC PFC converter is characterized in that a topological structure of the converter is composed of two power switch tubes, three inductors, five diodes and four capacitors. Compared with the conventional negative output switch capacitor SEPIC PFC converter, the invention has two improvements: firstly, two switching tubes are adopted at the input end to replace diodes, so that a bridgeless structure is realized, and the efficiency of a converter system is improved; secondly, a small inductor is embedded in the output end, so that current peaks generated by the switched capacitor can be effectively eliminated. The embodiment can effectively overcome the defects of the traditional SEPIC PFC converter and the traditional bridge switched capacitor SEPIC converter, and has practical engineering application value in the field of high-voltage application.
Example two:
this embodiment is substantially the same as the first embodiment, and is characterized in that:
in the embodiment, the two switching tubes are controlled by the same control signal, so that the switching tubes are used for replacing diodes, an input end rectifier bridge is eliminated, lower conduction loss of a semiconductor device can be realized, higher efficiency is realized, and a 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 negative output high gain bridgeless switched capacitor SEPIC PFC converter is characterized in that: the topological structure of the three-phase inverter consists of two power switching tubes, three inductors, 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 The three inductors are respectively the first inductor (L)1) A second inductor (L)2) And a third inductance (L)S) (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 the first inductor (L)1) One end of (V) and an input AC power supply (V)in) Connected to a first inductor (L)1) And the other end of the first diode (D)1) And a second diode (D)2) Are connected with each other;
a first diode (D)1) And a first inductor (L)1) And a second diode (D)2) Are connected to a common terminal, a first diode (D)1) And the other end of the first switch tube (S)1) And a first capacitance (C)1) Are connected with each other;
second diode (D)2) One terminal and the first inductor (L)1) And a first diode (D)1) Are connected, a second diode (D)2) The other end is connected with a fourth diode (D)4) A third capacitor (C)3) A second inductor (L)2) And a second switching tube (S)2) Are connected with each other;
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) A fourth diode (D)4) A second inductor (L)2) And a third capacitance (C)3) Are connected with each other;
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 and a second inductor (L)2) A third diode (D)3) And a second capacitance (C)2) Are connected with each other;
second inductance (L)2) And a first capacitor (C)1) A third diode (D)3) And a second capacitance (C)2) Is disclosedA second inductor (L) connected in common2) The other end is connected with a second switch tube (S)2) A fourth diode (D)4) A second diode (D)2) And a third capacitance (C)3) Are connected with each other;
a second capacitance (C)2) One terminal and the first capacitor (C)1) A second inductor (L)2) And a third diode (D)3) Are connected to a second capacitor (C)2) The other end is connected with a fifth diode (D)5) And a fourth diode (D)4) Are connected with each other;
third diode (D)3) And a first capacitor (C)1) A second capacitor (C)2) And a second inductance (L)2) Are connected, a third diode (D)3) The other end and a third capacitor (C)3) And a third inductance (L)S) Are connected with each other;
third capacitance (C)3) And a second diode (D)2) A fourth diode (D)4) A second switch tube (S)2) And a second inductance (L)2) Are connected to a third capacitor (C)3) The other end is connected with a third diode (D)3) And a third inductance (L)S) Are connected with each other;
fourth diode (D)4) And a second diode (D)2) A second switch tube (S)2) A second inductor (L)2) And a third capacitance (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;
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);
third inductance (L)S) And a third capacitor (C)3) And a third diode (D)3) Connected, third inductance (L)S) The other end and a fourth capacitor (C)0) Is connected with a load (R);
fourth step ofCapacitance (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 inductor (L)S) Is connected with a load (R);
or, the third inductance (L)S) And a fifth diode (D)5) Are used in series.
2. The negative output high gain bridgeless switched capacitor SEPIC PFC converter of claim 1, wherein: the two switching tubes are controlled by the same control signal.
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| CN202110289249.9A CN112953263A (en) | 2021-03-18 | 2021-03-18 | Negative output high-gain bridgeless switched capacitor SEPIC PFC converter |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103546026A (en) * | 2013-10-30 | 2014-01-29 | 华南理工大学 | Single-phase high-gain no-bridge power factor correction converter |
| CN104638900A (en) * | 2015-01-27 | 2015-05-20 | 大连理工大学 | One-cycle control method applied to bridgeless SEPIC-PFC (single-ended primary-inductor converter-power factor correction) circuit |
| CN206023578U (en) * | 2016-10-08 | 2017-03-15 | 山东大学 | A kind of non-isolated high step-up ratio DC converter of modified |
| WO2020027374A1 (en) * | 2018-07-30 | 2020-02-06 | 전북대학교산학협력단 | Single-phase isolated sepic converter for power factor correction |
| CN112003467A (en) * | 2020-08-17 | 2020-11-27 | 上海大学 | Three switching tube bridgeless Cuk power factor correction converter |
-
2021
- 2021-03-18 CN CN202110289249.9A patent/CN112953263A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103546026A (en) * | 2013-10-30 | 2014-01-29 | 华南理工大学 | Single-phase high-gain no-bridge power factor correction converter |
| CN104638900A (en) * | 2015-01-27 | 2015-05-20 | 大连理工大学 | One-cycle control method applied to bridgeless SEPIC-PFC (single-ended primary-inductor converter-power factor correction) circuit |
| CN206023578U (en) * | 2016-10-08 | 2017-03-15 | 山东大学 | A kind of non-isolated high step-up ratio DC converter of modified |
| WO2020027374A1 (en) * | 2018-07-30 | 2020-02-06 | 전북대학교산학협력단 | Single-phase isolated sepic converter for power factor correction |
| CN112003467A (en) * | 2020-08-17 | 2020-11-27 | 上海大学 | Three switching tube bridgeless Cuk power factor correction converter |
Non-Patent Citations (1)
| Title |
|---|
| ESAM H.ISMAIL: ""A Family of Single-Switch PWM Converters With High Step-Up Conversion Ratio"", 《IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS》 * |
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