CN105939107A - Hybrid type quasi-switch voltage-boosting DC-DC converter - Google Patents

Hybrid type quasi-switch voltage-boosting DC-DC converter Download PDF

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Publication number
CN105939107A
CN105939107A CN201610508637.0A CN201610508637A CN105939107A CN 105939107 A CN105939107 A CN 105939107A CN 201610508637 A CN201610508637 A CN 201610508637A CN 105939107 A CN105939107 A CN 105939107A
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diode
electric capacity
inductance
semiconductor
oxide
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CN105939107B (en
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张波
朱小全
丘东元
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Fuhua Electronic Co., Ltd.
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South China University of Technology SCUT
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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
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/1552—Boost converters exploiting the leakage inductance of a transformer or of an alternator as boost inductor

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention provides a hybrid type quasi-switch voltage-boosting DC-DC converter. The converter comprises a voltage source, a two-end quasi-Z-source unit which consists of a first inductor, a first diode, a first capacitor, a second inductor and a second capacitor, a quasi-switch voltage-boosting unit which consists of a second capacitor, a second diode, a first MOS transistor, a first diode and a second inductor, a switch capacitor unit which consists of a third capacitor and a third diode, a second MOS transistor, an output diode, an output filtering capacitor and a load. The circuit is simple in structure, combines the single-level voltage-boosting/voltage-bucking characteristics of the quasi-Z-source unit and the quasi-switch voltage-boosting unit as well as the characteristic of the parallel charge and series discharge of the switch capacitor, and expands the output voltage gain.

Description

A kind of mixed type quasi-boost switching DC-DC converter
Technical field
The present invention relates to Power Electronic Circuit technical field, be specifically related to the mixed type high-gain quasi-boost switching DC-DC converter circuit of a kind of combination switching capacity and quasi-Z source unit.
Background technology
In fuel cell power generation, photovoltaic generation, the DC voltage provided due to single solaode or single fuel cell is relatively low, the need for electricity of existing electrical equipment cannot be met, grid-connected demand can not be met, generally require the voltage reaching required that is together in series by multiple batteries.On the one hand this method greatly reduces the reliability of whole system, the most also needs to solve series average-voltage problem.For this reason, it may be necessary to can be high-tension high-gain DC-DC converter low voltage transition.The Z source converter proposed in recent years and switching boost converter SBI are the DC-DC converter of high-gain, but wish that the occasion that higher voltage exports, traditional Z source converter and SBI changer just become to be no longer able to meet requirement in the input of some low-voltages.In order to expand traditional Z source converter and the scope of application of SBI changer, it is necessary to improved by topology and expand its output voltage gain.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, it is provided that the mixed type high-gain quasi-boost switching DC-DC converter circuit of a kind of combination switching capacity and quasi-Z source unit, concrete technical scheme is as follows.
A kind of mixed type quasi-boost switching DC-DC converter circuit, including voltage source, quasi-Z source unit, quasi-boost switching unit, the second metal-oxide-semiconductor, switching capacity unit, output diode, output filter capacitor and load.Described quasi-Z source unit is made up of the first inductance, the first electric capacity, the first diode, the second inductance and the second electric capacity；Described quasi-boost switching unit is made up of the second inductance, the first diode, the second electric capacity, the first metal-oxide-semiconductor and the second diode；Described switching capacity unit is made up of the 3rd electric capacity and the 3rd diode.
In above-mentioned a kind of mixed type quasi-boost switching DC-DC converter circuit, the positive pole of described voltage source is connected with the negative pole of the second electric capacity and one end of the first inductance respectively；The other end of described first inductance is connected with the anode of the first diode and the negative pole of the first electric capacity respectively；The drain electrode with the negative electrode of the second diode, the anode of output diode and the first metal-oxide-semiconductor respectively of the positive pole of described second electric capacity is connected；The negative electrode of described first diode is connected with one end of the second inductance and the source electrode of the first metal-oxide-semiconductor respectively；The positive pole of described first electric capacity positive pole with anode, the other end of the second inductance, the drain electrode of the second metal-oxide-semiconductor and the 3rd electric capacity of the second diode respectively is connected；The negative electrode of described output diode is connected with the positive pole of output filter capacitor and the other end of load respectively；The negative pole of the described 3rd electric capacity other end with anode, the negative pole of output filter capacitor and the load of the 3rd diode respectively is connected；The negative pole of described voltage source is connected with source electrode, the negative electrode of the 3rd diode of the second metal-oxide-semiconductor respectively.
When the first metal-oxide-semiconductor and the second metal-oxide-semiconductor simultaneously turn on, described first diode, the second diode, the 3rd diode are turned off, and voltage source and the first electric capacity are to the first induction charging；Voltage source and the second electric capacity are to the second induction charging；Meanwhile, voltage source together with the 3rd electric capacity and the second electric capacity to output filter capacitor and load supplying.When the first metal-oxide-semiconductor and the second metal-oxide-semiconductor simultaneously turn off, described first diode, the second diode, the 3rd diode are both turned on, and output diode turns off.Described second inductance and the first electric capacity are in parallel, form loop；Second electric capacity is charged together with the second inductance by described first inductance；Described voltage source, the first inductance and the second inductance give the 3rd electric capacity charging；Meanwhile, output filter capacitor powering load.
Compared with prior art, circuit of the present invention has the advantage that and technique effect: the whole circuit structure of the present invention is simple, and easy to control, output voltage gain is higher；Circuit of the present invention make use of the single-stage buck characteristic of quasi-Z source unit and quasi-boost switching unit and switching capacity to charge parallel the characteristic of discharged in series, thus improves output voltage further, it is achieved that the expansion of quasi-switching boost converter output voltage gain.
Accompanying drawing explanation
Fig. 1 is a kind of mixed type quasi-boost switching DC-DC converter circuit in the specific embodiment of the invention.
Fig. 2 a, Fig. 2 b are that the mixed type high-gain quasi-boost switching DC-DC converter circuit of a kind of combination switching capacity and quasi-Z source unit shown in Fig. 1 is at its first switching tube S respectively1With second switch pipe S2Simultaneously turn on and simultaneously turn off the equivalent circuit diagram of period.
Fig. 3 a is gain curve and Boost, switching capacity Boost, traditional Z source DC-DC converter and the gain curve comparison diagram of novel quasi-Z source DC-DC converter of circuit of the present invention.
Fig. 3 b is the gain curve of the gain curve of circuit of the present invention and Boost, switching capacity Boost, traditional Z source DC-DC converter and novel quasi-Z source DC-DC converter comparison diagram in dutycycle D is less than 0.38 in Fig. 3 a.
Detailed description of the invention
Technical scheme is explained in detail by above content, is embodied as being further described to the present invention below in conjunction with accompanying drawing.
With reference to Fig. 1, a kind of mixed type quasi-boost switching DC-DC converter circuit of the present invention, including voltage source, quasi-Z source unit, quasi-boost switching unit, the second metal-oxide-semiconductor, switching capacity unit, output diode, output filter capacitor and load.Described quasi-Z source unit is made up of the first inductance, the first electric capacity, the first diode, the second inductance and the second electric capacity；Described quasi-boost switching unit is made up of the second inductance, the first diode, the second electric capacity, the first metal-oxide-semiconductor and the second diode；Described switching capacity unit is made up of the 3rd electric capacity and the 3rd diode.
The concrete connected mode of circuit of the present invention is as follows: the positive pole of described voltage source is connected with the negative pole of the second electric capacity and one end of the first inductance respectively；The other end of described first inductance is connected with the anode of the first diode and the negative pole of the first electric capacity respectively；The drain electrode with the negative electrode of the second diode, the anode of output diode and the first metal-oxide-semiconductor respectively of the positive pole of described second electric capacity is connected；The negative electrode of described first diode is connected with one end of the second inductance and the source electrode of the first metal-oxide-semiconductor respectively；The positive pole of described first electric capacity positive pole with anode, the other end of the second inductance, the drain electrode of the second metal-oxide-semiconductor and the 3rd electric capacity of the second diode respectively is connected；The negative electrode of described output diode is connected with the positive pole of output filter capacitor and the other end of load respectively；The negative pole of the described 3rd electric capacity other end with anode, the negative pole of output filter capacitor and the load of the 3rd diode respectively is connected；The negative pole of described voltage source is connected with source electrode, the negative electrode of the 3rd diode of the second metal-oxide-semiconductor respectively.
Fig. 2 a, Fig. 2 b give the process chart of circuit of the present invention.Fig. 2 a, Fig. 2 b correspondence respectively is the first metal-oxide-semiconductor S1With the second metal-oxide-semiconductor S2Simultaneously turn on and simultaneously turn off the equivalent circuit diagram of period.Having the part that electric current flows through during solid line represents changer in figure, dotted line represents the part that in changer, no current flows through.
The work process of the present invention is as follows:
Stage 1, such as Fig. 2 a: the first metal-oxide-semiconductor S1With the second metal-oxide-semiconductor S2Simultaneously turn on, now the first diode D1, the second diode D2, the 3rd diode D3It is turned off.Circuit defines three loops, respectively: voltage source ViWith the first electric capacity C1With the 3rd electric capacity C3Give output filter capacitor C togetherfWith load RLCharging, forms loop；Voltage source ViWith the first electric capacity C1To the first inductance L1It is charged energy storage, forms loop；Voltage source ViWith the second electric capacity C2To the second inductance L2It is charged energy storage, forms loop.
Stage 2, such as Fig. 2 the b: the first metal-oxide-semiconductor S1With the second metal-oxide-semiconductor S2Simultaneously turn off, now the first diode D1, the second diode D2, the 3rd diode D3It is both turned on, output diode DoTurn off.Circuit defines four loops, respectively: voltage source Vi, the first inductance L1With the second inductance L2To the 3rd electric capacity C3Charging energy-storing, forms loop；Second inductance L2To the first electric capacity C1Charging, forms loop；First inductance L1With the second inductance L2To the second electric capacity C2Charging energy-storing, forms loop；Output filter capacitor CfGive load RLPower supply, forms loop.
To sum up situation, due to the first metal-oxide-semiconductor S1With the second metal-oxide-semiconductor S2Switch triggering pulse identical, if switching tube S1And S2Dutycycle be D, switch periods is Ts.And set VL1And VL2It is respectively inductance L1And L2The voltage at two ends, VC1、VC2And VC3It is respectively the first electric capacity C1, the second electric capacity C2With the 3rd electric capacity C3Voltage, VS1For and VS2It is respectively the first metal-oxide-semiconductor S1With the second metal-oxide-semiconductor S2Voltage between drain electrode and source electrode.Switch periods TsIn, making output voltage is Vo.After changer enters steady operation, draw following voltage relationship derivation.
Operation mode 1: the first metal-oxide-semiconductor S1With the second metal-oxide-semiconductor S2Simultaneously turn on, shown in corresponding equivalent circuit diagram 2a, therefore have an equation below:
VL1=Vi+VC1 (1)
VL2=Vi+VC2 (2)
VO=Vi+VC3+VC2 (3)
VS1=VS2=0 (4)
Metal-oxide-semiconductor S1And S2ON time be DTs。
Operation mode 2: the first metal-oxide-semiconductor S1With the second metal-oxide-semiconductor S2Being turned off, corresponding equivalent circuit as shown in Figure 2 b, therefore has an equation below:
VL1=VC1-VC2 (5)
VL2=-VC1 (6)
Vi=VC3-VC2 (7)
VS2=VC3 (8)
VS1=VC1 (9)
Metal-oxide-semiconductor S1And S2Turn-off time be (1-D) Ts。
Analyze according to above, the first inductance L1 and the second inductance L2 use inductance Flux consumption conservation principle, simultaneous formula (1), formula (5), formula (2) and formula (6) can obtain respectively:
D(Vi+VC1)+(1-D)(VC1-VC2)=0 (10)
D(Vi+VC2)-(1-D)VC1=0 (11)
Thus, the first electric capacity C can be drawn1Voltage VC1With the second electric capacity C2Voltage VC2Voltage and voltage source ViBetween relational expression be:
V C 1 = D 1 - 3 D + D 2 V i - - - ( 12 )
V C 2 = D ( 2 - D ) 1 - 3 D + D 2 V i - - - ( 13 )
The 3rd electric capacity C can be obtained by formula (7), formula (12) and formula (13)3Voltage VC3With voltage source ViBetween relational expression be:
V C 3 = 1 - D 1 - 3 D + D 2 V i - - - ( 14 )
Then by formula (3), formula (13) and formula (14), the gain factor expression formula that can obtain circuit of the present invention is:
G = V o V i = 2 ( 1 - D ) 1 - 3 D + D 2 - - - ( 15 )
It is gain curve and Boost, switching capacity Boost, traditional Z source DC-DC converter and the gain curve comparison diagram of novel quasi-Z source DC-DC converter of circuit of the present invention as shown in Figure 3 a；Fig. 3 b is the gain curve of the gain curve of circuit of the present invention and Boost, switching capacity Boost, traditional Z source DC-DC converter and novel quasi-Z source DC-DC converter comparison diagram in dutycycle D is less than 0.38 in Fig. 3 a, figure includes the gain curve of circuit of the present invention, the gain curve of traditional Z source DC-DC converter, the gain curve of novel quasi-Z source DC-DC converter, the gain curve of switching capacity Boost, the gain curve of Boost.As seen from the figure, circuit of the present invention is in the case of dutycycle D is less than 0.38, and gain G just can reach very big, and dutycycle D of circuit of the present invention is not over 0.38.Therefore, by contrast, the gain of circuit of the present invention is the highest.
In sum, circuit overall structure of the present invention is simple, easy to control, combine the single-stage buck characteristic of quasi-Z source unit and quasi-boost switching unit and switching capacity charges the characteristic of discharged in series parallel, achieve the further lifting of output voltage gain, and there is not inrush current and metal-oxide-semiconductor opens the dash current of moment.
Above-described embodiment is the present invention preferably embodiment; but embodiments of the present invention are also not restricted by the embodiments; the change made under other any spirit without departing from the present invention and principle, modify, substitute, combine, simplify; all should be the substitute mode of equivalence, within being included in protection scope of the present invention.

Claims (3)

1. a mixed type quasi-boost switching DC-DC converter circuit, it is characterised in that include voltage source (Vi), quasi-Z source unit, quasi-boost switching unit, the second metal-oxide-semiconductor (S2), switching capacity unit, output diode (Do), output filter capacitor (Cf) and load (RL)；Described quasi-Z source unit is by the first inductance (L1), the first electric capacity (C1), the first diode (D1), the second inductance (L2) and the second electric capacity (C2) constitute；Described quasi-boost switching unit is by the second inductance (L2), the first diode (D1), the second electric capacity (C2), the first metal-oxide-semiconductor (S1) and the second diode (D2) constitute；Described switching capacity unit is by the 3rd electric capacity (C3) and the 3rd diode (D3) constitute.
A kind of mixed type quasi-boost switching DC-DC converter circuit the most according to claim 1, it is characterised in that described voltage source (Vi) positive pole respectively with the second electric capacity (C2) negative pole and the first inductance (L1) one end connect；Described first inductance (L1) the other end respectively with the first diode (D1) anode and the first electric capacity (C1) negative pole connect；Described second electric capacity (C2) positive pole respectively with the second diode (D2) negative electrode, output diode (Do) anode and the first metal-oxide-semiconductor (S1) drain electrode connect；Described first diode (D1) negative electrode respectively with the second inductance (L2) one end and the first metal-oxide-semiconductor (S1) source electrode connect；Described first electric capacity (C1) positive pole respectively with the second diode (D2) anode, the second inductance (L2) the other end, the second metal-oxide-semiconductor (S2) drain electrode and the 3rd electric capacity (C3) positive pole connect；Described output diode (Do) negative electrode respectively with output filter capacitor (Cf) positive pole and load (RL) the other end connect；Described 3rd electric capacity (C3) negative pole respectively with the 3rd diode (D3) anode, output filter capacitor (Cf) negative pole and load (RL) the other end connect；Described voltage source (Vi) negative pole respectively with the second metal-oxide-semiconductor (S2) source electrode, the 3rd diode (D3) negative electrode connect.
A kind of mixed type quasi-boost switching DC-DC converter circuit the most according to claim 1, it is characterised in that as the first metal-oxide-semiconductor (S1) and the second metal-oxide-semiconductor (S2) when simultaneously turning on, described first diode (D1), the second diode (D2), the 3rd diode (D3) be turned off, voltage source (Vi) and the first electric capacity (C1) to the first inductance (L1) charging；Voltage source (Vi) and the second electric capacity (C2) to the second inductance (L2) charging；Meanwhile, voltage source (Vi) and the 3rd electric capacity (C3) and the second electric capacity (C2) together to output filter capacitor (Cf) and load (RL) power supply；As the first metal-oxide-semiconductor (S1) and the second metal-oxide-semiconductor (S2) when simultaneously turning off, described first diode (D1), the second diode (D2), the 3rd diode (D3) be both turned on, output diode (Do) turn off；Described second inductance (L2) and the first electric capacity (C1) in parallel, form loop；Described first inductance (L1) and the second inductance (L2) together to the second electric capacity (C2) charging；Described voltage source (Vi), the first inductance (L1) and the second inductance (L2) give the 3rd electric capacity (C3) charging；Meanwhile, output filter capacitor (Cf) give load (RL) power supply.
CN201610508637.0A 2016-06-30 2016-06-30 A kind of quasi- boost switching DC-DC converter of mixed type Active CN105939107B (en)

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Cited By (6)

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CN106849643A (en) * 2017-01-26 2017-06-13 华南理工大学 A kind of switching capacity type mixes quasi- Z source converters
CN107134942A (en) * 2017-06-16 2017-09-05 华南理工大学 A kind of quasi- Z-source inverter of active switch capacitor
CN108768171A (en) * 2018-06-12 2018-11-06 天津大学 The quasi- wide gain two-way DC converter of the sources Z-switching capacity of switch for electric vehicle
CN108809087A (en) * 2018-06-04 2018-11-13 华南理工大学 The quasi- sources the Z DC-DC converter of active switch capacitor and passive switch inductance mixed
CN109952698A (en) * 2016-10-26 2019-06-28 株式会社自动网络技术研究所 DC-DC converter
CN111211687A (en) * 2020-01-15 2020-05-29 广东工业大学 Hourglass-shaped impedance network boost converter and switching power supply

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CN105529925A (en) * 2016-02-01 2016-04-27 浙江艾罗电源有限公司 Boost convertor based on switch inductor
CN205847090U (en) * 2016-06-30 2016-12-28 华南理工大学 A kind of mixed type quasi-boost switching DC DC changer

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CN105529925A (en) * 2016-02-01 2016-04-27 浙江艾罗电源有限公司 Boost convertor based on switch inductor
CN205847090U (en) * 2016-06-30 2016-12-28 华南理工大学 A kind of mixed type quasi-boost switching DC DC changer

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109952698A (en) * 2016-10-26 2019-06-28 株式会社自动网络技术研究所 DC-DC converter
CN109952698B (en) * 2016-10-26 2020-12-01 株式会社自动网络技术研究所 DCDC converter
CN106849643A (en) * 2017-01-26 2017-06-13 华南理工大学 A kind of switching capacity type mixes quasi- Z source converters
CN107134942A (en) * 2017-06-16 2017-09-05 华南理工大学 A kind of quasi- Z-source inverter of active switch capacitor
CN108809087A (en) * 2018-06-04 2018-11-13 华南理工大学 The quasi- sources the Z DC-DC converter of active switch capacitor and passive switch inductance mixed
CN108768171A (en) * 2018-06-12 2018-11-06 天津大学 The quasi- wide gain two-way DC converter of the sources Z-switching capacity of switch for electric vehicle
CN111211687A (en) * 2020-01-15 2020-05-29 广东工业大学 Hourglass-shaped impedance network boost converter and switching power supply

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