CN105529918A - A High Gain Trans-Z Source Boost Converter - Google Patents
A High Gain Trans-Z Source Boost Converter Download PDFInfo
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- CN105529918A CN105529918A CN201511034574.1A CN201511034574A CN105529918A CN 105529918 A CN105529918 A CN 105529918A CN 201511034574 A CN201511034574 A CN 201511034574A CN 105529918 A CN105529918 A CN 105529918A
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- 239000003990 capacitor Substances 0.000 claims abstract description 46
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 230000005284 excitation Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Classifications
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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
- H02M3/1555—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 for the generation of a regulated current to a load whose impedance is substantially inductive
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
技术领域technical field
本发明涉及DC/DC变换器领域,具体涉及一种高增益Trans-Z源升压变换器。The invention relates to the field of DC/DC converters, in particular to a high-gain Trans-Z source step-up converter.
背景技术Background technique
光伏、燃料电池等可再生能源发电系统的发展已成为解决化石燃料短缺和保护环境的重要手段之一。但光伏、燃料电池等输出的电压很低,一般需要DC/DC变换器升压。然而许多升压DC/DC变换器受到占空比、生热和损耗的限制,无法实现大幅度的升压,如Boost变换器,其电压增益为1/(1-D),D为占空比,但由于寄生参数的影响,其增益受到限制;又如准Z源变换器,其电压增益为1/(1-2D),较Boost变换器有了一定的提高,但仍有提升的空间。The development of renewable energy power generation systems such as photovoltaics and fuel cells has become one of the important means to solve the shortage of fossil fuels and protect the environment. However, the output voltage of photovoltaics and fuel cells is very low, and DC/DC converters are generally required to boost the voltage. However, many step-up DC/DC converters are limited by duty cycle, heat generation and loss, and cannot achieve a large boost. For example, Boost converters have a voltage gain of 1/(1-D), where D is the duty cycle ratio, but due to the influence of parasitic parameters, its gain is limited; another example is the quasi-Z source converter, its voltage gain is 1/(1-2D), which has a certain improvement compared with the Boost converter, but there is still room for improvement .
发明内容Contents of the invention
本发明的目的在于克服上述现有技术的不足,提出一种高增益Trans-Z源升压变换器。The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and propose a high-gain Trans-Z source boost converter.
本发明电路中具体包括直流输入电源Vin、第一电感所述、第一二极管所述、第一电容所述、第二电容所述、第三电容所述、第二二极管所述、匝比为1:n(n≥2)所述的变压器所述、开关管所述、第三二极管所述、输出电容所述和负载。The circuit of the present invention specifically includes DC input power V in , the first inductor, the first diode, the first capacitor, the second capacitor, the third capacitor, and the second diode The above, the transformer with a turn ratio of 1:n (n≥2), the switch tube, the third diode, the output capacitor and the load.
本发明电路具体的连接方式为:所述的直流输入电源Vin的正极与第一电感所述的一端连接。所述的第一电感所述的另外一端与第一二极管所述的阳极和第二电容所述的一端连接。所述的第一二极管所述的阴极与第一电容所述的一端、第三电容所述的一端和第二二极管所述的阳极连接。所述的第二二极管所述的阴极与变压器所述副边的同名端连接。所述的变压器所述副边的异名端与第三电容所述的另外一端和变压器所述原边的同名端连接。所述的变压器所述原边的异名端与第二电容所述的另外一端、开关管所述的漏极和第三二极管所述的阳极连接。所述的第三二极管所述的阴极与输出电容所述的一端和负载的一端连接。所述的输出电容所述与负载并联。所述的直流输入电源Vin的负极与第一电容所述的另外一端、开关管所述的源极、输出电容所述的另外一端和负载的另外一端连接。The specific connection mode of the circuit of the present invention is: the positive pole of the DC input power source V in is connected to the one end of the first inductor. The other end of the first inductor is connected to the anode of the first diode and the one end of the second capacitor. The cathode of the first diode is connected with the one end of the first capacitor, the one end of the third capacitor and the anode of the second diode. The cathode of the second diode is connected to the same terminal of the secondary side of the transformer. The opposite end of the secondary side of the transformer is connected to the other end of the third capacitor and the same end of the primary side of the transformer. The opposite end of the primary side of the transformer is connected to the other end of the second capacitor, the drain of the switch tube and the anode of the third diode. The cathode of the third diode is connected to the one end of the output capacitor and one end of the load. The output capacitor is connected in parallel with the load. The negative pole of the DC input power supply Vin is connected to the other end of the first capacitor, the source of the switch tube, the other end of the output capacitor and the other end of the load.
与现有技术相比,本发明电路具有的优势为:相比于传统的Boost变换器(其输出电压为)和准Z源变换器(其输出电压为)等DC/DC变换器,在相同的占空比和输入电压的情况下,具有更高的输出电压,输出电压为在相同的输入电压和输出电压条件下,本发明电路只需要较小的占空比就可以将低等级电压升至高等级的电压,而且输入输出共地、输入电流连续等,因此本发明电路具有很广泛的应用前景。Compared with prior art, the advantage that circuit of the present invention has is: compared with traditional Boost converter (its output voltage is ) and a quasi-Z source converter (whose output voltage is ) and other DC/DC converters, in the case of the same duty cycle and input voltage, have a higher output voltage, the output voltage is Under the same input voltage and output voltage conditions, the circuit of the present invention can raise the low-level voltage to a high-level voltage only with a small duty cycle, and the input and output common ground, continuous input current, etc., so the circuit of the present invention has the advantages of Very broad application prospects.
附图说明Description of drawings
图1为一种高增益Trans-Z源升压变换器结构图。Figure 1 is a structural diagram of a high-gain Trans-Z source boost converter.
图2为一个开关周期主要元件的电压电流波形图。Figure 2 is a voltage and current waveform diagram of the main components of a switching cycle.
图3a、图3b为一个开关周期内电路模态图。Figure 3a and Figure 3b are circuit modal diagrams in a switching cycle.
图4为提出的电路、Boost和准Z源变换器的增益Vout/Vin随占空比D变化的波形图。Fig. 4 is the waveform diagram of the gain V out /V in of the proposed circuit, Boost and quasi-Z source converter as the duty cycle D changes.
具体实施方式detailed description
为以下结合实施例及附图对本发明作进一步详细的描述说明,但本发明的实施方式不限于此。需指出的是,以下若有未特别详细说明之过程或参数,均是本领域技术人员可参照现有技术理解或实现的。The present invention will be described in further detail in conjunction with the following examples and accompanying drawings, but the embodiments of the present invention are not limited thereto. It should be noted that, if there are any processes or parameters that are not specifically described in detail below, those skilled in the art can understand or implement them with reference to the prior art.
本发明的基本拓扑结构和各主要元件电压电流参考方向如图1所示。为了分析方便,电路结构中的器件均视为理想器件。开关管S的驱动信号vGS、第一二极管D1电流iD1、第二二极管D2电流iD2、第三二极管D3电流iD3、第一电感L1电流iL1、变压器T的励磁电感Lm电流iLm、第一电容C1电压VC1、第二电容C2电压VC2、第三电容C3电压VC3的波形图如图2所示。The basic topological structure of the present invention and the reference directions of voltage and current of each main component are shown in FIG. 1 . For the convenience of analysis, the devices in the circuit structure are regarded as ideal devices. The driving signal v GS of the switch tube S, the current i D1 of the first diode D 1 , the current i D2 of the second diode D 2 , the current i D3 of the third diode D 3 , the current i L1 of the first inductor L 1 , the waveforms of the excitation inductance L m current i Lm of the transformer T, the voltage V C1 of the first capacitor C 1 , the voltage V C2 of the second capacitor C 2 , and the voltage V C3 of the third capacitor C 3 are shown in FIG. 2 .
在t0~t1阶段,变换器在此阶段的模态图如图3a所示,开关管S的驱动信号vGS从低电平变为高电平,开关管S导通,第一二极管D1、第二二极管D2和第三二极管D3承受反向电压截止。直流输入电源Vin与第二电容C2通过开关管S同时给第一电感L1充电,第一电容C1和第三电容C3通过开关管S同时给变压器T的励磁电感Lm充电。此外,输出电容Cout给负载供电。In the t 0 ~ t 1 stage, the modal diagram of the converter at this stage is shown in Figure 3a, the driving signal v GS of the switch tube S changes from low level to high level, the switch tube S is turned on, and the first two The diode D 1 , the second diode D 2 and the third diode D 3 are cut off under reverse voltage. The DC input power supply V in and the second capacitor C2 charge the first inductor L1 through the switch S at the same time, and the first capacitor C1 and the third capacitor C3 charge the excitation inductance L m of the transformer T through the switch S at the same time. In addition, the output capacitor C out supplies power to the load.
在t1~t2阶段,变换器在此阶段的模态图如图3b所示,开关管S的驱动信号vGS从高电平变为低电平,开关管S关断,第一二极管D1、第二二极管D2和第三二极管D3承受正向电压导通。直流输入电源Vin和第一电感L1通过第一二极管D1和第三二极管D3同时给第一电容C1、第二电容C2、第三电容C3、输出电容Cout和负载充电,变压器T的励磁电感Lm通过第一二极管D1和第二二极管D2同时给第一电容C1、第二电容C2、第三电容C3、输出电容Cout和负载充电。此外,直流输入电源Vin、第一电感L1和变压器T的励磁电感Lm通过第一二极管D1、第二二极管D2和第三二极管D3同时给输出电容Cout和负载充电。In the stage t 1 ~ t 2 , the modal diagram of the converter at this stage is shown in Figure 3b. The driving signal v GS of the switch tube S changes from high level to low level, and the switch tube S is turned off. The pole diode D 1 , the second diode D 2 and the third diode D 3 are turned on under forward voltage. The DC input power supply V in and the first inductor L 1 simultaneously supply the first capacitor C 1 , the second capacitor C 2 , the third capacitor C 3 , and the output capacitor C through the first diode D 1 and the third diode D 3 out and the load, the excitation inductance L m of the transformer T simultaneously charges the first capacitor C 1 , the second capacitor C 2 , the third capacitor C 3 , and the output capacitor through the first diode D 1 and the second diode D 2 C out and load charging. In addition, the DC input power source V in , the first inductance L 1 and the excitation inductance L m of the transformer T simultaneously feed the output capacitor C through the first diode D 1 , the second diode D 2 and the third diode D 3 out and load charging.
本发明电路的稳态增益推导如下。The steady-state gain of the circuit of the present invention is derived as follows.
由第一电感L1与变压器T的励磁电感Lm的电压在一个开关周期内的平均值为零,可得到下列关系式。Since the average value of the voltages of the first inductance L 1 and the excitation inductance L m of the transformer T is zero within one switching cycle, the following relationship can be obtained.
(Vin+VC2)ton+(Vin-VC1)toff=0(1)(V in +V C2 )t on +(V in -V C1 )t off =0(1)
又当开关管S关断时,输出电压Vout满足下列关系式。And when the switch tube S is turned off, the output voltage V out satisfies the following relationship.
Vout=VC1+VC2(4)V out =V C1 +V C2 (4)
联立求解式(1)、(2)、(3)、(4)可得到输出电压Vout与直流输入电压Vin的关系。Simultaneously solving equations (1), (2), (3), and (4) can obtain the relationship between the output voltage V out and the DC input voltage V in .
传统Boost变换器与准Z源变换器的稳态增益分别为1/(1-D)和(1-D)/(1-2D)(D为占空比),当匝比n=2时,本发明所提电路与Boost变换器、准Z源变换器的稳态增益比较图如图4所示,从图4可知,当输入电压为10V时,本发明提出的电路只需占空比为0.24就可以升至250V左右,而另两种变换器则需要较大的占空比。The steady-state gains of the traditional Boost converter and the quasi-Z source converter are 1/(1-D) and (1-D)/(1-2D) respectively (D is the duty cycle), when the turn ratio n=2 , the steady-state gain comparison diagram of the proposed circuit of the present invention and the Boost converter and the quasi-Z source converter is shown in Figure 4, as can be seen from Figure 4, when the input voltage is 10V, the circuit proposed by the present invention only needs the duty cycle If it is 0.24, it can be raised to about 250V, while the other two converters require a larger duty cycle.
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Cited By (3)
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CN105939126A (en) * | 2016-06-30 | 2016-09-14 | 华南理工大学 | Switch inductor type hybrid quasi-Z-source inverter |
CN105958823A (en) * | 2016-06-28 | 2016-09-21 | 华南理工大学 | A Current Continuous High-Gain Switching Step-Up Quasi-Z Source Converter Circuit |
CN109756105A (en) * | 2018-06-30 | 2019-05-14 | 华南理工大学 | A kind of input and output common ground active switched capacitor Z source boost chopper circuit |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105958823A (en) * | 2016-06-28 | 2016-09-21 | 华南理工大学 | A Current Continuous High-Gain Switching Step-Up Quasi-Z Source Converter Circuit |
CN105958823B (en) * | 2016-06-28 | 2019-04-09 | 华南理工大学 | Current continuous type high-gain switch boosting quasi-Z source converter circuit |
CN105939126A (en) * | 2016-06-30 | 2016-09-14 | 华南理工大学 | Switch inductor type hybrid quasi-Z-source inverter |
CN105939126B (en) * | 2016-06-30 | 2018-09-14 | 华南理工大学 | A kind of quasi- Z-source inverter of switched inductors type mixing |
CN109756105A (en) * | 2018-06-30 | 2019-05-14 | 华南理工大学 | A kind of input and output common ground active switched capacitor Z source boost chopper circuit |
CN109756105B (en) * | 2018-06-30 | 2024-04-26 | 华南理工大学 | Z-source boost chopper circuit of input-output common-ground active switch capacitor |
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