CN103762875B - A kind of asymmetric dual output Z source half-bridge converter - Google Patents

A kind of asymmetric dual output Z source half-bridge converter Download PDF

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CN103762875B
CN103762875B CN201410042979.9A CN201410042979A CN103762875B CN 103762875 B CN103762875 B CN 103762875B CN 201410042979 A CN201410042979 A CN 201410042979A CN 103762875 B CN103762875 B CN 103762875B
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electric capacity
inductance
switching tube
load
source
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CN103762875A (en
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张波
张桂东
丘东元
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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 invention provides a kind of asymmetric dual output Z source half-bridge converter, comprise DC power supply, diode, the first electric capacity, the second electric capacity, the first inductance, the second inductance, the first switching tube, second switch pipe, the 3rd switching tube, the first load and the second load.First inductance, the second inductance, the first electric capacity and the second electric capacity composition Z source impedance, the existence of Z source impedance avoids the damage caused because switching tube leads directly on the one hand, also plays the effect of boosting on the other hand when switching tube leads directly to.By controlling the conducting duty ratio of three switching tubes, boosting that two-way exports and step-down can be controlled respectively, and realize the symmetry of the positive negative pulse stuffing of two output voltage and asymmetric.The present invention has only used three switching tubes, and does not need any electric capacity in parallel at mains side, can realize doubleway output.The present invention has high reliability, wide output voltage range and abundant output AC impulse waveform, is specially adapted to the electrochemical power source devices such as the metallide of dual output.

Description

A kind of asymmetric dual output Z source half-bridge converter
Technical field
The present invention relates to converters technical field, be specifically related to a kind of asymmetric dual output Z source half-bridge converter.
Background technology
Conventional half-bridge converter, inverter bridge leg is directly in parallel with direct voltage source, when the upper and lower switching tube of inverter bridge leg leads directly to because of false triggering, can flow through very large electric current and switching tube is damaged.And the amplitude of this kind of half-bridge inverter output AC voltage only has the half of input voltage, and belong to voltage-dropping type inverter, the scope of output voltage is narrow.In order to improve the amplitude of output AC voltage, traditional way adds boosting link in inverter prime, or boost at output termination transformer.Add in inverter prime in the scheme of boosting link and at least need a multiplex switching tube, which increase the switching loss in power transimission, too increase the complexity of control.Although connect at inverter output end the amplitude that transformer can improve output voltage, when transformer turns ratio is fixed, the amplitude of output AC voltage is certain value.
At present, there is Patents to propose to use Z source half-bridge converter to solve the problems referred to above, but when needs two-way exports time, just need two Z source half-bridge converters.And two Z source half-bridge converters, need two power supplys, four storage capacitors, four switching tubes, and two Z source impedances.Except this, corresponding control can increase cost and control difficulty, reduces the stability of system.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of asymmetric dual output Z source half-bridge converter is provided.The present invention only needs a power supply, three switching tubes, and a Z source impedance.Than traditional two Z source half-bridge converters, lack a power supply, four storage capacitors, a switching tube and a Z source impedance, but the output gain higher than traditional Z source half-bridge converter can be reached, and there is high reliability, wide output voltage range and abundant output AC impulse waveform, be specially adapted to the electrochemical power source devices such as the metallide of dual output.
The present invention is achieved through the following technical solutions:
A kind of asymmetric dual output Z source half-bridge converter, comprises DC power supply, diode, the first electric capacity, the second electric capacity, the first inductance, the second inductance, the first switching tube, second switch pipe, the 3rd switching tube, the first load and the second load.One of the present invention asymmetric dual output Z source half-bridge converter, the Single port of Z source impedance is connected in parallel on the input of DC power supply and Diode series, the other Single port of Z source impedance is connected in parallel on the brachium pontis two ends that three switching tubes are in series, and the first load is connected between the tie point of the first switching tube and second switch pipe and one end of the first electric capacity, the second load is connected between the tie point of second switch Guan Yu tri-switching tube and second electric capacity one end.Described Z source impedance, is made up of the first inductance, the second inductance, the first electric capacity and the second electric capacity.
In the half-bridge converter of above-mentioned one asymmetric dual output Z source, the positive pole of described input power is connected with the anode of diode, the negative electrode of diode, one end of first inductance and one end of the first electric capacity are connected to a bit, other one end of first inductance, one end of second electric capacity and the drain electrode of the first switching tube are connected to a bit, the source electrode of the first switching tube, the drain electrode of second switch pipe and one end of the first load are connected to a bit, the source electrode of second switch pipe, the drain electrode of the 3rd switching tube and one end of the second load are connected to a bit, other one end of first load, one end of second inductance and other one end of the first electric capacity are connected to a bit, other one end of second load, other one end of second inductance, other one end of second electric capacity and the negative pole of power supply are connected to a bit.
Compared with prior art tool of the present invention has the following advantages:
The present invention only needs a power supply, three switching tubes, and a Z source impedance.Than traditional two Z source half-bridge converters with two-way output, lack a power supply, four storage capacitors, a switching tube and a Z source impedance, but the output gain higher than traditional Z source half-bridge converter can be reached, and there is high reliability, wide output voltage range and abundant output AC impulse waveform, be specially adapted to the electrochemical power source devices such as the metallide of dual output.
Converter of the present invention can prevent the straight-through damage caused circuit of switching tube, and can obtain higher output gain when switching tube leads directly to, and overcomes conventional half-bridge converter and exports the shortcoming being confined to input voltage.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the embodiment of a kind of asymmetric dual output Z source of the present invention half-bridge converter;
Fig. 2 a, Fig. 2 b, Fig. 2 c, Fig. 2 d, Fig. 2 e, Fig. 2 f are the groundwork modal graph of circuit diagram shown in Fig. 1 in a switch periods respectively.
Fig. 3 is the main oscillogram of correspondence of a kind of dual output Z source half-bridge converter.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Case study on implementation
As shown in Figure 1, a kind of asymmetric dual output Z source half-bridge converter, is characterized in that, comprise DC power supply V d, diode D, the first electric capacity C 1, the second electric capacity C 2, the first inductance L 1, the second inductance L 2, the first switching tube S 1, second switch pipe S 2, the 3rd switching tube S 3, the first load R 1with the second load R 2.One of the present invention asymmetric dual output Z source half-bridge converter, the Single port of Z source impedance is connected in parallel on the input of DC power supply and Diode series, and its other Single port is connected in parallel on the brachium pontis two ends that three switching tubes are in series, and the first switching tube S 1with second switch pipe S 2tie point and the first electric capacity C 1one end be connected to the first load R 1, second switch Guan Yu tri-switching tube S 3tie point and the second electric capacity C 2one end is connected to the second load R 2;
Described Z source impedance is by the first inductance L 1, the second inductance L 2, the first electric capacity C 1with the second electric capacity C 2composition;
A kind of asymmetric dual output Z source half-bridge converter, is characterized in that, described input power V dpositive pole be connected with the anode of diode D, the negative electrode of diode D, the first inductance L 1one end and the first electric capacity C 1one end be connected to a bit, the first inductance L 1other one end, the second electric capacity C 2one end and the first switching tube S 1drain electrode be connected to a bit, the first switching tube S 1source electrode, second switch pipe S 2drain electrode and the first load R 1one end be connected to a bit, second switch pipe S 2source electrode, the 3rd switching tube S 3drain electrode and the second load R 2one end be connected to a bit, the first load R 1other one end, the second inductance L 2one end and the first electric capacity C 1other one end be connected to a bit, the second load R 2other one end, the second inductance L 2other one end, the second electric capacity C 2other one end and the negative pole of power supply be connected to a bit.
As shown in Fig. 2 a, 2b, 2c, 2d, 2e and 2f, wherein Fig. 2 a is the circuit diagram of operation mode 1, Fig. 2 b is the circuit diagram of operation mode 2, Fig. 2 c is the circuit diagram of operation mode 3, Fig. 2 d is the circuit diagram of operation mode 4, Fig. 2 e is the circuit diagram of operation mode 5, and Fig. 2 f is the circuit diagram of operation mode 6.In figure, solid line represents in converter the part having electric current to flow through, and dotted line represents in converter the part not having electric current to flow through, as follows to its corresponding operational modal analysis with reference to figure 3.Wherein the first switching tube S 1, second switch pipe S 2with the 3rd switching tube S 3three switching tube delayed D successively 1open-minded after T time section, ON time is D 2t, T are switching tube switch periods.With the positive reference direction clockwise for voltage.
First electric capacity C 1voltage be V c1, the second electric capacity C 2voltage be V c1, the first inductance L 1voltage be V l1, the second inductance L 2voltage be V l2, the voltage of the first load is v o1, the voltage of the second load is v o2.
Operation mode 1:
As Fig. 3 time period [t 0-t 1] shown in, the first switching tube S 1, second switch pipe S 2with the 3rd switching tube S 3three switching tube all conductings, diode D turns off, and equivalent circuit diagram now as shown in Figure 2 a.Now the first electric capacity C 1it is the first inductance L 1charging, the first inductance L 1electric current straight line rises, the first load R 1by second switch pipe S 2with the 3rd switching tube S 3conducting and short circuit, output voltage V o1be 0.Meanwhile, the second electric capacity C 2be respectively the second inductance L 2with the second load R 2transmitting energy, inductance L 2electric current straight line rises.First inductance L 1voltage is: V l1=V c1=V l2=V c2, output voltage v o1=0, v o2=V c2=V l2.This phases-time is (D 1+ D 2-1) T.
Operation mode 2:
As Fig. 3 time period [t 1-t 2] shown in, second switch pipe S 2turn off, the first switching tube S 1with the 3rd switching tube S 3two switching tube all conductings, diode D conducting, equivalent circuit diagram now as shown in Figure 2 b.Power supply V dby diode D to electric capacity first electric capacity C 1, the second electric capacity C 2, the first inductance L 1with the second inductance L 2charging, simultaneously electric capacity C 1with inductance L 1give the first load R together 1there is provided energy, L 1inductive current declines.Second inductance L 2with the second load R 2parallel connection, to the second load R 2transmitting energy, the second inductance L 2electric current declines.First inductance L 1voltage is: V l1=V d-V c2, output voltage v o1=V c1-V l1, v o2=V l2.This phases-time is (1-D 2) T.
Operation mode 3:
As Fig. 3 time period [t 2-t 3] shown in, three switching tube all conductings, diode turns off, and equivalent circuit diagram is now as shown in Figure 2 c.The principle in this stage is identical with operation mode 1.This phases-time is (D 1+ D 2-1) T.
Operation mode 4:
As Fig. 3 time period [t 3-t 4] shown in, the 3rd switching tube S 3turn off, all the other two switching tube all conductings, diode current flow, equivalent circuit diagram now as shown in Figure 2 d.Power supply V dthe first electric capacity C is given by diode D 1, the second electric capacity C 2, the first inductance L 1with the second inductance L 2charging, simultaneously the first electric capacity C 1with inductance L 1give the first load R together 1there is provided energy, inductive current declines.Second electric capacity C 2with the second load R 2parallel connection, to two load R 2transmitting energy.First inductance L 1voltage is: V l1=V d-V c2, output voltage v o1=V c1-V l1, v o2=V c2.This phases-time is (1-D 2) T.
Operation mode 5:
As Fig. 3 time period [t 4-t 5] shown in, second switch pipe S 2turn off, the first switching tube S 1with the 3rd switching tube S 3two switching tube all conductings, diode D conducting, equivalent circuit diagram now as shown in Figure 2 e.The principle in this stage is identical with operation mode 1.This phases-time is (D 1+ D 2-1) T.
Operation mode 6:
As Fig. 3 time period [t 5-t 6] shown in, the first switching tube S 1turn off, second switch pipe S 2with the 3rd switching tube S 3all conductings, diode current flow, equivalent circuit diagram now as shown in figure 2f.R 1short circuit is formed, output voltage V by second switch pipe and the 3rd switching tube conducting o1be 0.Power supply V dthe first electric capacity C is given by diode D 1, the second electric capacity C 2, the first inductance L 1with the second inductance L 2charging.Second inductance L 2with the second load R 2parallel connection, to the second load R 2transmitting energy, the second inductance L 2electric current declines.First load L 1voltage is: V l1=V d-V c2, output voltage v o1=0, v o2=V l2.This phases-time is (1-D 2) T.
To sum up, according to inductance in a switch periods, according to inductance L 1volt-second number conservation, ∫ 0 T V L 1 dt = 0 , Namely 3 ( ∫ 0 ( D 2 + D 1 - 1 ) T V C 2 dt + ∫ ( D 2 + D 1 - 1 ) T D 1 T ( V d - V C 2 ) dt ) = 0 , Thus
V C 2 = 1 - D 2 2 - ( D 1 + 2 D 2 ) V d - - - ( 1 )
Can obtain thus also obtain thus exporting expression formula and be
Compared with prior art tool of the present invention has the following advantages:
The present invention only needs a power supply, three switching tubes, and a Z source impedance.Than traditional two Z source half-bridge converters with two-way output, lack a power supply, four storage capacitors, a switching tube and a Z source impedance, but the output gain higher than traditional Z source half-bridge converter can be reached, and can realize that there is high reliability, wide output voltage range and abundant output AC impulse waveform, be specially adapted to the electrochemical power source devices such as the metallide of multi output.
Converter of the present invention can prevent the straight-through of switching tube, and can obtain higher output gain when switching tube leads directly to, and overcomes conventional half-bridge converter and exports the shortcoming being confined to input voltage.
Above-described embodiment is the present invention's preferably execution mode; but embodiments of the present invention are not limited by the examples; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.

Claims (1)

1. an asymmetric dual output Z source half-bridge converter, is characterized in that, comprise DC power supply (V d), diode ( d) , firstelectric capacity ( c 1), secondelectric capacity ( c 2), the first inductance ( l 1), the second inductance ( l 2), the first switching tube (S 1) ,second switch pipe (S 2), the 3rd switching tube (S 3), the first load (R 1) and the second load (R 2); First inductance (L 1), the second inductance (L 2), the first electric capacity (C 1) and the second electric capacity (C 2) composition Z source impedance, the Single port of Z source impedance is connected in parallel on the input of DC power supply and Diode series, and the other Single port of Z source impedance is connected in parallel on the first switching tube (S 1) ,second switch pipe (S 2), the 3rd switching tube (S 3) the brachium pontis two ends that are in series, the first load (R 1) be connected to the first switching tube (S 1) and second switch pipe (S 2) tie point and the first electric capacity (C 1) one end between, the second load (R 2) be connected to second switch Guan Yu tri-switching tube (S 3) tie point and the second electric capacity (C 2) between one end;
Described DC power supply (V d) positive pole be connected with the anode of diode (D), the negative electrode of diode (D), the first inductance (L 1) one end and the first electric capacity (C 1) one end be connected to a bit, the first inductance (L 1) other one end, the second electric capacity (C 2) one end and the first switching tube (S 1) drain electrode be connected to a bit, the first switching tube (S 1) source electrode, second switch pipe (S 2) drain electrode and the first load (R 1) one end be connected to a bit, second switch pipe (S 2) source electrode, the 3rd switching tube (S 3) drain electrode and the second load (R 2) one end be connected to a bit, the first load (R 1) other one end, the second inductance (L 2) one end and the first electric capacity (C 1) other one end be connected to a bit, the second load (R 2) other one end, the second inductance (L 2) other one end, the second electric capacity (C 2) other one end and the negative pole of power supply be connected to a bit.
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CN106100403B (en) * 2016-08-26 2017-09-15 广东工业大学 A kind of multi output Z sources half-bridge converter
CN106787868B (en) * 2017-03-13 2019-02-05 广东工业大学 A kind of half-bridge inverter based on impedance network
CN107947622A (en) * 2017-12-27 2018-04-20 广东工业大学 A kind of six terminal impedance network half-bridge inverter of multi output
CN112752374B (en) * 2021-01-29 2024-04-09 广东东菱电源科技有限公司 Potentiometer type constant power circuit, driving power supply and power supply constant power regulating method

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CN101908831A (en) * 2009-06-04 2010-12-08 北京昆兰新能源技术有限公司 Circuit for converting direct-current voltage into alternating-current voltage
CN102891622A (en) * 2012-10-24 2013-01-23 哈尔滨东方报警设备开发有限公司 Z-source type double-switch alternating current inversion power supply
CN203872079U (en) * 2014-01-28 2014-10-08 华南理工大学 Asymmetric dual-output Z-source half-bridge converter

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US7130205B2 (en) * 2002-06-12 2006-10-31 Michigan State University Impedance source power converter

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Publication number Priority date Publication date Assignee Title
CN101908831A (en) * 2009-06-04 2010-12-08 北京昆兰新能源技术有限公司 Circuit for converting direct-current voltage into alternating-current voltage
CN102891622A (en) * 2012-10-24 2013-01-23 哈尔滨东方报警设备开发有限公司 Z-source type double-switch alternating current inversion power supply
CN203872079U (en) * 2014-01-28 2014-10-08 华南理工大学 Asymmetric dual-output Z-source half-bridge converter

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