CN203434865U - Single-phase high-gain boost converter - Google Patents

Single-phase high-gain boost converter Download PDF

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Publication number
CN203434865U
CN203434865U CN201320575135.1U CN201320575135U CN203434865U CN 203434865 U CN203434865 U CN 203434865U CN 201320575135 U CN201320575135 U CN 201320575135U CN 203434865 U CN203434865 U CN 203434865U
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China
Prior art keywords
diode
electric capacity
inductance
coupling inductance
capacitor
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CN201320575135.1U
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Chinese (zh)
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张波
张能
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South China University of Technology SCUT
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South China University of Technology SCUT
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Abstract

The utility model provides a single-phase high-gain boost converter. The single-phase high-gain boost converter mainly comprises a voltage transfer circuit, a coupled inductor boost circuit and an output circuit, all of which are connected in sequence. The voltage transfer circuit comprises a first inductor, a switch tube and a first capacitor. The coupled inductor boost circuit comprises a primary winding and a secondary winding of a coupled inductor, a second capacitor, a third capacitor, a first diode and a second diode. The output circuit comprises a third diode, a fourth capacitor and a load. The single-phase high-gain boost converter is simple in structure and high in output voltage gain.

Description

A kind of single-phase high-gain booster converter
Technical field
The utility model relates to converters technical field, is specifically related to a kind of single-phase high-gain booster converter.
Background technology
New energy field as systems such as solar power generation or fuel cells in, what provide due to individual module is all the direct current that voltage is lower, and actual required electric pressure is conventionally higher, therefore need the booster converter of one-level high efficiency, high-gain, stable performance low voltage and direct current to be converted to the high voltage direct current that is applicable to actual needs.
At present the most frequently used booster converter is single tube Boost converter, yet the scope of boosting of this converter is very limited, conventionally boosts multiple all in ten times, is difficult to meet the conversion requirement of high-gain.Based on conventional single tube Boost converter using coupling inductance technology, can realize the expansion of gain, but input current ripple is larger.Use switched capacitor technique also can realize gain and expand, this technology circuit is simple in structure, easily realizes, but exist switching tube current spike impact large, the shortcoming that voltage gain is limited, and the gain of converter and the complexity of structure are directly proportional, i.e. gain is higher, and circuit is more complicated.
Utility model content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of single-phase high-gain booster converter is provided.
The utility model is applicable to the occasion that photovoltaic system, fuel cell system, energy-recuperation system etc. need to be used high-gain high-performance electric power electronic converter.
The utility model is achieved through the following technical solutions:
A booster converter, comprises the voltage transfer circuit, coupling inductance booster circuit and the output circuit that connect successively.
Described voltage transfer circuit comprises the first inductance, switching tube and the first electric capacity;
Described coupling inductance booster circuit comprises former limit winding and secondary winding, the second electric capacity, the 3rd electric capacity, the first diode and second diode of coupling inductance;
Described output circuit comprises the 3rd diode, the 4th electric capacity and load.
One end of described the first inductance is connected with the positive pole of input power, and the other end difference drain electrode of switching tube, one end of the first electric capacity of the first inductance connect;
The source electrode of described switching tube is connected with the negative pole of input power;
The other end of described the first electric capacity respectively with the anode of the first diode, the different name end of the former limit winding of one end of the second electric capacity, coupling inductance be connected;
The Same Name of Ends of the former limit winding of described coupling inductance is connected with the negative pole of input power;
The negative electrode of described the first diode is connected with one end of the 3rd electric capacity, the different name end of the secondary winding of coupling inductance respectively;
The other end of described the second electric capacity respectively with the anodic bonding of Same Name of Ends second diode of the secondary winding of coupling inductance;
The other end of described the 3rd electric capacity respectively with the negative electrode of the second diode, the anodic bonding of the 3rd diode;
The negative electrode of described the 3rd diode is connected with the 4th one end of electric capacity, one end of load respectively;
Described the 4th other end of electric capacity, the other end of load be connected with the negative pole of input power;
Compared with prior art the utlity model has following advantage:
(1) the utility model is without extra power switch, simple in structure, and it is convenient to control, and efficiency is high;
(2), when converter of the present utility model is worked, input current ripple is less, is convenient to input current filtering;
(3) in the process that the coupling inductance in the utility model turns on and off at switching tube, all participate in energy transmission, improved the utilance of coupling inductance;
(4) the utility model utilize simultaneously two electric capacity the second electric capacity and the 3rd electric capacity realize voltage transfer, not only realized the further expansion of voltage gain, and further improved the utilance of coupling inductance.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the embodiment of a kind of single-phase high-gain booster converter described in the utility model;
Fig. 2 a, Fig. 2 b are respectively the groundwork mode figure of circuit diagram shown in Fig. 1 in a switch periods.Wherein Fig. 2 a is the circuit diagram of operation mode 1, and Fig. 2 b is the circuit diagram of operation mode 2.In figure, solid line represents the part that has electric current to flow through in converter, and dotted line represents the part that does not have electric current to flow through in converter;
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
Embodiment
As shown in Figure 1, a kind of single-phase high-gain booster converter, comprises voltage transfer circuit X, the coupling inductance booster circuit Y and the output circuit Z that connect successively.
Described voltage transfer circuit X comprises the first inductance L 1, switching tube S and the first capacitor C 1;
Described coupling inductance booster circuit Y comprises the former limit winding L of coupling inductance 21secondary winding L with coupling inductance 22, the second capacitor C 2, the 3rd capacitor C 3, the first diode D 1with the second diode D 2;
Described output circuit comprises the 3rd diode D 3, the 4th capacitor C 4with load R.
Described the first inductance L 1one end and input power V gpositive pole connect, the first inductance L 1the other end respectively drain electrode, the first capacitor C of switching tube S 1one end connect;
The source electrode of described switching tube S and input power V gnegative pole connect;
Described the first capacitor C 1the other end respectively with the first diode D 1anode, the second capacitor C 2one end, the former limit winding L of coupling inductance 21different name end connect;
The former limit winding L of described coupling inductance 21same Name of Ends and input power V gnegative pole connect;
Described the first diode D 1negative electrode respectively with the 3rd capacitor C 3one end, the secondary winding L of coupling inductance 22different name end connect;
Described the second capacitor C 2the other end respectively with the secondary winding L of coupling inductance 22same Name of Ends the second diode D 2anodic bonding;
Described the 3rd capacitor C 3the other end respectively with the second diode D 2negative electrode, the 3rd diode D 3anodic bonding;
Described the 3rd diode D 3negative electrode respectively with the 4th capacitor C 4one end of one end, load R connect;
Described the 4th capacitor C 4the other end, the other end and the input power V of load R gnegative pole connect;
As shown in Figure 2 a and 2 b, a kind of single-phase high-gain booster converter mainly contains 2 operation modes in a switch periods, is described below respectively:
Operation mode 1:
As shown in Figure 2 a, switching tube S is open-minded, the first diode D 1, the second diode D 2conducting, the 3rd diode D 3cut-off.Input power V ggive the first inductance L 1charging, the first inductance L 1energy storage, the first capacitor C 1by coupling inductance to the second capacitor C 2, the 3rd capacitor C 3transferring energy, the second capacitor C 2with the 3rd capacitor C 3energy storage.The 4th capacitor C 4energy is provided to load R.
Under this operation mode, related electric parameter relationship formula is:
V L1=V d (1)
V L21=V C1 (2)
V C2=V C3=NV C1 (3)
Wherein, V drepresent input supply voltage, V l1represent the first inductance L 1both end voltage under this operation mode, V l21the both end voltage of the magnetizing inductance of expression coupling inductance under this operation mode, V c1, V c2, V c3represent respectively the first capacitor C 1, the second capacitor C 2with the 3rd capacitor C 3both end voltage, N(N>=1) represent the ratio of the former limit of coupling inductance winding and the number of turn of secondary winding.
Operation mode 2:
As shown in Figure 2 b, switching tube S disconnects, the 3rd diode D 3conducting, the first diode D 1with the second diode D 2cut-off.The first inductance L 1release energy, the second electric capacity and the 3rd capacitor C 3to output circuit, release energy simultaneously, the 4th capacitor C 4energy storage.
Under this operation mode, related electric parameter expression is:
V′ L21+V C2+V C3+NV′ L21=V o (4)
V′ L1+V d=V C2+V′ L21 (5)
Wherein, V orepresent output voltage, V ' l21the both end voltage of the magnetizing inductance of expression coupling inductance under this operation mode, V ' l1represent the first inductance L 1both end voltage under this operation mode.
During converter steady operation, voltage gain is analyzed:
If the switch periods of switching tube work is T s, duty ratio is D, 1 duration of operation mode is DT s, 2 duration of operation mode are (1-D) T s.According to inductance weber equilibrium response, can obtain:
V L1DT s=V′ L1(1-D)T s (6)
V L21DT s=V′ L21(1-D)T s (7)
Simultaneous formula (1)~formula (7) can obtain:
V o = 2 N + D - ND 1 - D V d
Can output thus, the voltage gain M of a kind of single-phase high-gain booster converter described in the utility model is:
M = V o V d = 2 N + D - ND 1 - D
Compared with prior art the utlity model has following advantage:
The utility model is without extra power switch, simple in structure, and it is convenient to control, and efficiency is high;
During converter work of the present utility model, input current ripple is less, is convenient to input current filtering;
In the process that coupling inductance in the utility model turns on and off at switching tube, all participate in energy transmission, improved the utilance of coupling inductance;
The utility model utilizes i.e. the second capacitor C of two electric capacity simultaneously 2with the 3rd capacitor C 3realize voltage transfer, not only realized the further expansion of voltage gain, and further improved the utilance of coupling inductance.
Above-described embodiment is preferably execution mode of the utility model; but execution mode of the present utility model is not limited by the examples; other any do not deviate from change, the modification done under Spirit Essence of the present utility model and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection range of the present utility model.

Claims (2)

1. a single-phase high-gain booster converter, is characterized in that, comprises the voltage transfer circuit (X), coupling inductance booster circuit (Y) and the output circuit (Z) that connect in turn;
Described voltage transfer circuit (X) comprises the first inductance (L 1), switching tube (S) and the first electric capacity (C 1);
Described coupling inductance booster circuit (Y) comprises the former limit winding (L of coupling inductance 21), the secondary winding (L of coupling inductance 22), the second electric capacity (C 2), the 3rd electric capacity (C 3), the first diode (D 1) and the second diode (D 2);
Described output circuit (Z) comprises the 3rd diode (D 3), the 4th electric capacity (C 4) and load (R).
2. a kind of single-phase high-gain booster converter according to claim 1, is characterized in that, described the first inductance (L 1) one end and input power (V g) positive pole connect, the first inductance (L 1) the other end respectively drain electrode and the first electric capacity (C of switching tube (S) 1) one end connect;
The source electrode of described switching tube (S) and input power (V g) negative pole connect;
Described the first electric capacity (C 1) the other end respectively with the first diode (D 1) anode, the second electric capacity (C 2) one end and the former limit winding (L of coupling inductance 21) different name end connect;
The former limit winding (L of described coupling inductance 21) Same Name of Ends and input power (V g) negative pole connect;
Described the first diode (D 1) negative electrode respectively with the 3rd electric capacity (C 3) one end, the secondary winding (L of coupling inductance 22) different name end connect;
Described the second electric capacity (C 2) the other end respectively with the secondary winding (L of coupling inductance 22) Same Name of Ends the second diode (D 2) anodic bonding;
Described the 3rd electric capacity (C 3) the other end respectively with the second diode (D 2) negative electrode and the 3rd diode (D 3) anodic bonding;
Described the 3rd diode (D 3) negative electrode respectively with the 4th electric capacity (C 4) one end be connected with one end of load (R);
Described the 4th electric capacity (C 4) the other end, the other end and the input power (V of load (R) g) negative pole connect.
CN201320575135.1U 2013-09-16 2013-09-16 Single-phase high-gain boost converter Withdrawn - After Issue CN203434865U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103490628A (en) * 2013-09-16 2014-01-01 华南理工大学 Single-phase high-gain boost converter
CN105939108A (en) * 2016-06-30 2016-09-14 华南理工大学 Switch inductor type quasi-switch voltage-boosting DC-DC converter
CN107959413A (en) * 2017-11-22 2018-04-24 西安电子科技大学 A kind of low high pressure converted power supply of integrated circuit
CN108696168A (en) * 2018-06-22 2018-10-23 燕山大学 High-gain single-phase single-grade Transformer-free photovoltaic DC-to-AC converter and its control method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103490628A (en) * 2013-09-16 2014-01-01 华南理工大学 Single-phase high-gain boost converter
CN103490628B (en) * 2013-09-16 2016-06-29 华南理工大学 A kind of single-phase high-gain boost converter
CN105939108A (en) * 2016-06-30 2016-09-14 华南理工大学 Switch inductor type quasi-switch voltage-boosting DC-DC converter
CN105939108B (en) * 2016-06-30 2018-09-14 华南理工大学 A kind of quasi- boost switching DC-DC converter of switched inductors type
CN107959413A (en) * 2017-11-22 2018-04-24 西安电子科技大学 A kind of low high pressure converted power supply of integrated circuit
CN108696168A (en) * 2018-06-22 2018-10-23 燕山大学 High-gain single-phase single-grade Transformer-free photovoltaic DC-to-AC converter and its control method
CN108696168B (en) * 2018-06-22 2019-02-01 燕山大学 High-gain single-phase single-grade Transformer-free photovoltaic DC-to-AC converter and its control method

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AV01 Patent right actively abandoned

Granted publication date: 20140212

Effective date of abandoning: 20160629

C25 Abandonment of patent right or utility model to avoid double patenting