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WO2015070515A1 - 电源转换装置及其转换方法 - Google Patents

电源转换装置及其转换方法 Download PDF

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Publication number
WO2015070515A1
WO2015070515A1 PCT/CN2014/000913 CN2014000913W WO2015070515A1 WO 2015070515 A1 WO2015070515 A1 WO 2015070515A1 CN 2014000913 W CN2014000913 W CN 2014000913W WO 2015070515 A1 WO2015070515 A1 WO 2015070515A1
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WO
WIPO (PCT)
Prior art keywords
capacitor
inductor
power conversion
load
diode
Prior art date
Application number
PCT/CN2014/000913
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English (en)
French (fr)
Inventor
潘晴财
陈伯彦
洪大胜
Original Assignee
东林科技股份有限公司
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Publication date
Application filed by 东林科技股份有限公司 filed Critical 东林科技股份有限公司
Priority to US15/037,475 priority Critical patent/US20160285383A1/en
Publication of WO2015070515A1 publication Critical patent/WO2015070515A1/zh

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Classifications

    • 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
    • H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
    • 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
    • H02M1/14—Arrangements for reducing ripples from DC input or output
    • 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
    • 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
    • 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
    • H02M1/14—Arrangements for reducing ripples from DC input or output
    • H02M1/143—Arrangements for reducing ripples from DC input or output using compensating arrangements
    • 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
    • H02M3/06—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider
    • 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
    • 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

Definitions

  • the invention relates to power conversion, and in particular to a power conversion device and a conversion method thereof.
  • the conventional power conversion device uses an output capacitor to be connected to the output end of the power supply and then connected to the load, so as to directly pass through the charge and discharge of the capacitor to achieve the purpose of power conversion output.
  • a rectifier circuit is usually connected before the output capacitor to convert AC power into DC power.
  • the power conversion device for AC/DC conversion often causes a power factor to be low and a total current harmonic distortion to be severe because the input voltage of the AC power source and the input current are in different phases.
  • the rectifier circuit charges the output capacitor, thereby causing the output capacitor to charge down for a short time, causing the diode in the rectifier circuit to be turned on.
  • the time is also shortened, which in turn leads to an increase in the peak value of the on-current, resulting in distortion of the input current waveform and a reduction in the power factor, which in turn causes severe distortion of the final output power to the load.
  • an object of the present invention is to provide a power conversion device and a conversion method thereof, which can effectively improve a power factor and can also effectively suppress voltage ripple output to a load.
  • the invention provides a direct current conversion power conversion device for converting power of a direct current power source to a load, and the power source has a positive terminal and a negative terminal;
  • the power conversion device includes a first inductor, a switch component, and a diode a first capacitor, a second inductor, and a second capacitor.
  • One end of the first inductor is connected to the positive terminal.
  • the switch assembly is connected at one end to the other end of the first inductor, and the other end is connected to the negative terminal.
  • the diode is positively coupled to the junction of the switch assembly and the first inductor.
  • One end of the first capacitor is connected to the cathode of the diode.
  • the second inductor is connected at one end to the first capacitor and the cathode of the diode, and the other end is connected to the other end of the first capacitor.
  • the first The second capacitor is connected in parallel with the load, and one end is connected to the other end of the second inductor connected to the first capacitor, and the other end is connected to the connection of the switch component and the negative terminal.
  • the object of the present invention can also be further achieved by the following technical measures.
  • the switch assembly includes an electronic switch connected in parallel and an intrinsic diode, and one end of the electronic switch is connected to the other end of the first inductor at the same time, and the other end of the electronic switch is The anode of the intrinsic diode is simultaneously connected to the negative terminal.
  • the object of the present invention is also achieved by the following technical solutions.
  • the invention also provides a direct DC power conversion method for a power conversion device, comprising the following steps:
  • the first inductor stops releasing energy, so that the energy storage of the second inductor charges the first capacitor, and the polarity of the voltage across the first capacitor is reversed, and the energy storage of the second capacitor continues The load release energy;
  • the object of the present invention can also be further achieved by the following technical measures.
  • the foregoing power conversion method after the step D, further includes a step of repeatedly performing steps A to D.
  • the first inductor is a resonant circuit formed by the first capacitor and the second inductor, and conducts energy storage thereof to the second capacitor.
  • step C after the first capacitor and the second inductor form a resonant circuit in step C, the energy storage of the second inductor charges the first capacitor, and the voltage across the second capacitor The polarity is reversed, and when the voltage across the second inductor is greater than the voltage across the second capacitor, the intrinsic diode is turned on, and proceeds to step D.
  • the present invention further provides an AC/DC conversion power conversion device for converting power of an AC power source to a load, and comprising a rectifier circuit, a first inductor, a switch component, a diode, a first capacitor, a second inductor, and a second capacitance.
  • the rectifier circuit has an input side and an output side, and the input side is electrically connected to the AC power source for converting the power of the AC power source into DC power and outputting from the output side;
  • the polarity has a positive terminal and a negative terminal. One end of the first inductor is connected to the positive terminal.
  • the switch assembly is connected at one end to the other end of the first inductor, and the other end is connected to the negative terminal.
  • the diode is positively coupled to the junction of the switch assembly and the first inductor.
  • One end of the first capacitor is connected to the cathode of the diode.
  • One end of the second inductor is connected to the first capacitor and the cathode of the diode, and the other end is connected to the other of the first capacitor One end.
  • the second capacitor is connected in parallel with the load, and one end is connected to the other end of the second inductor connected to the first capacitor, and the other end is connected to the connection of the switch component and the negative terminal.
  • the object of the present invention can also be further achieved by the following technical measures.
  • the switch assembly includes an electronic switch connected in parallel and an intrinsic diode, and one end of the electronic switch is connected to the other end of the first inductor at the same time, and the other end of the electronic switch is The anode of the intrinsic diode is simultaneously connected to the negative terminal.
  • the object of the invention is again achieved by the following technical solutions.
  • the invention further provides a method for converting AC/DC power of a power conversion device, comprising the following steps:
  • the first inductor stops releasing energy, so that the energy storage of the second inductor charges the first capacitor, and the polarity of the voltage across the first capacitor is reversed, and the energy storage of the second capacitor continues The load release energy;
  • the object of the present invention can also be further achieved by the following technical measures.
  • the foregoing power conversion method after the step D, further includes a step of repeatedly performing steps A to D.
  • the first inductor is a resonant circuit formed by the first capacitor and the second inductor, and conducts energy storage thereof to the second capacitor.
  • step C after the first capacitor and the second inductor form a resonant circuit in step C, the energy storage of the second inductor charges the first capacitor, and the voltage across the second capacitor The polarity is reversed, and when the voltage across the second inductor is greater than the voltage across the second capacitor, the intrinsic diode is turned on, and proceeds to step D.
  • the power conversion device and the conversion method thereof have at least the following advantages and beneficial effects: the power conversion device and the conversion method thereof of the present invention can be effectively used in direct DC conversion or AC/DC power conversion.
  • the power factor is increased, and the voltage ripple output to the load can also be effectively suppressed.
  • FIG. 1 is a circuit diagram of a first preferred embodiment of the present invention
  • FIG. 5 are equivalent circuit diagrams of FIG. 1 in each step
  • Figure 6 is a circuit diagram of a second preferred embodiment of the present invention.
  • the power conversion device of the first preferred embodiment of the present invention is configured to convert the power of the AC power source 100 to the load 200, and includes a rectifier circuit 10, a switch component 20, an independent diode D, and two inductors. (first inductor L1 and second inductor L2) and two capacitors (first capacitor C1 and second capacitor C2).
  • a rectifier circuit 10 for converting the power of the AC power source 100 to the load 200
  • switch component 20 includes a switch component 20, an independent diode D, and two inductors. (first inductor L1 and second inductor L2) and two capacitors (first capacitor C1 and second capacitor C2).
  • the rectifier circuit 10 is a bridge rectifier in this embodiment, and the input side is connected to the AC power source 100 for receiving the power of the AC power source 100, converting it into DC power and outputting it from the output side.
  • the output side distinguishes between the positive terminal 12 and the negative terminal 14 depending on the polarity of the power supply.
  • bridge rectifiers intermediate taps, vacuum tubes or other architecture rectifiers can be used to achieve the same purpose.
  • One end of the first inductor L1 is connected to the positive terminal 12 .
  • the switch assembly 20 has one end connected to the other end of the first inductor L1 and the other end connected to the negative end 14 .
  • the switch assembly 20 includes an electronic switch SW and an intrinsic diode Dsw connected in parallel, and one end of the electronic switch SW and the negative pole of the intrinsic diode Dsw are simultaneously connected to the other end of the first inductor L1, and the electron The other end of the switch SW and the anode of the intrinsic diode Dsw are simultaneously connected to the negative terminal 14.
  • the anode of the diode D is connected to the junction of the electronic switch SW and the first inductor L1.
  • One end of the first capacitor C1 is connected to the cathode of the diode D.
  • the second inductor L2 is connected at one end to the negative junction of the first capacitor C1 and the diode D, and the other end is connected to the other end of the first capacitor C1.
  • the second capacitor C2 is connected in parallel with the load 200, and one end is connected to the other end of the second inductor L2 connected to the first capacitor C1, and the other end is connected to the junction of the electronic switch SW and the negative terminal 14.
  • the capacitors C1 to C2, the inductors L1 to L2, the input voltage, the output voltage, the switching frequency of the electronic switch SW, and the specifications of the load are as follows:
  • the following power conversion method can be used to achieve the purpose of improving power conversion efficiency, and the method includes the following steps:
  • the electronic switch is turned on, so that the electrical energy output by the rectifier circuit charges the first inductor, and the energy storage of the second inductor, the first capacitor, and the second capacitor releases the load. .
  • the electronic switch is disconnected, so that the energy storage of the first inductor charges the second inductor and the first capacitor, and is formed by the first capacitor C1 and the second inductor L2.
  • the resonant circuit conducts its stored energy to the second capacitor C2 such that the second capacitor C2 continues to discharge the load 200.
  • the first capacitor forms a resonant circuit with the second inductor, so that the energy storage of the second inductor charges the first capacitor, so that the first The voltage across the capacitor is reversed, and the energy storage of the second capacitor continues to discharge the load.
  • the intrinsic diode when the voltage across the second inductor is greater than the voltage across the second capacitor, the intrinsic diode is turned on, so that the first capacitor and the second inductor generate a voltage that is opposite to the previous step. And charging the second capacitor to cause the second capacitor to continue to discharge the load.
  • step A to step D After each step A to step D is performed, it indicates that the action of one cycle is completed. Therefore, in the case where the power conversion device continues to operate, after step D, the steps A to D are continuously repeated until the power conversion device stops operating.
  • the voltage across the first capacitor C1 can automatically provide a negative potential during each operation cycle, and the intrinsic diode Dsw is turned on to make the intrinsic diode Dsw turn on before and after the whole.
  • the circuit structure is changed, and the purpose of fast response and low chopping output voltage can be achieved, and the switching of the electronic switch SW can achieve the purpose of improving the power factor.
  • the present invention is applicable to the conversion of the AC/DC power supply, as shown in FIG. 6, the rectifier circuit 10 is omitted, and is directly connected to the positive and negative terminals of the DC power supply 300, and the power conversion method described above is utilized. It can achieve the purpose of direct DC power conversion, and at the same time achieve the effect of improving power factor, fast response and low chopping output voltage.

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

Abstract

一种电源转换装置及其转换方法，该装置用以将直流电源（300）的电能转换后供给负载（200），且该直流电源具有正电端（12）以及负电端（14）；该电源转换装置包括第一电感（L1）、开关组件（20）、二极管（D）、第一电容（C1)、第二电感（L2）及第二电容（C2）。该第一电感一端连接该正电端。该开关组件一端连接该第一电感另一端，另一端则连接该负电端。该二极管正极连接该开关组件。该第一电容一端连接该二极管负极。该第二电感与该第一电容并联。该第二电容与该负载并联，且一端连接该第二电感，另一端连接至该负电端。

Description

电源转换装置及其转换方法 技术领域
本发明与电源转换有关，特别是指一种电源转换装置及其转换方法。
背景技术
通常，传统的电源转换装置是利用输出电容跨接至电源的输出端再连接至负载，借以直接透过电容的充放电达到电能转换输出的目的。而以交直流转换为例，输出电容前通常再连接有整流电路以将交流电能转换成直流电能。
然而，前述用以交直流转换的电源转换装置在动作时，常因为交流电源的输入电压与输入电流处于相位不同的情况，而导致功率因子低落且电流总谐波失真严重。
除此之外，只有在该整流电路的输出电压高于输出电容的电压时，整流电路才会对输出电容进行充电，因此造成输出电容充能时间短缩，导致该整流电路中的二极管导通时间亦随之缩短，进而导致导通电流的峰值随之增大，造成输入电流波形失真及功率因子降低外，更会使得最后输出给负载的电能严重失真。
由此可见，上述现有的电源转换装置在结构与使用上，显然仍存在有不便与缺陷，而亟待加以进一步改进。为了解决其存在的问题，相关厂商莫不费尽心思来谋求解决之道，但长久以来一直未见适用的设计被发展完成，而一般产品又没有适切的结构能够解决上述问题，此显然是相关业者急欲解决的问题。
发明内容
有鉴于此，本发明的目的在于提供一种电源转换装置及其转换方法，可有效提高功率因子，且亦可有效地抑制输出给负载的电压涟波。
本发明的目的是采用以下的技术方案来实现的。本发明提供一种直直流转换的电源转换装置，用以将直流电源的电能转换后供给负载，且该直流电源具有正电端以及负电端；该电源转换装置包括第一电感、开关组件、二极管、第一电容、第二电感以及第二电容。其中，该第一电感一端与该正电端连接。该开关组件一端连接至该第一电感另一端，而另一端则连接至该负电端。该二极管正极连接至该开关组件与该第一电感的连接处。该第一电容一端与该二极管的负极连接。该第二电感一端连接至该第一电容与该二极管的负极连接处，而另一端则连接至该第一电容的另一端。该第 二电容与该负载并联，且一端连接至该第二电感与该第一电容相连的另一端，而另一端则连接至该开关组件与该负电端的连接处。
本发明的目的还可以采用以下的技术措施来进一步实现。
前述的电源转换装置，其中该开关组件包含有并联连接的电子开关以及本质二极管，且该电子开关一端与该本质二极管的负极同时连接至该第一电感另一端，而该电子开关另一端与该本质二极管的正极则同时连接至该负电端。
本发明的目的还采用以下的技术方案来实现的。本发明还提供一种电源转换装置的直直流电源转换方法，包含有下列步骤：
A.导通该电子开关，使该直流电源输出的电能对该第一电感充能，且该第二电感、第一电容以及该第二电容的储能对该负载释能；
B.断开该电子开关，使该第一电感的储能对该第二电感、该第一电容与该第二电容充能，使该第二电容的储能持续对该负载释能；
C.该第一电感停止释能，以使该第二电感的储能对该第一电容充能，而使该第一电容的跨压极性反转，且该第二电容的储能持续该负载释能；
D.导通该本质二极管，使该第一电容与该第二电感产生与前一步骤反向的电压，并对该第二电容充能，使该第二电容持续对该负载释能。
本发明的目的还可以采用以下的技术措施来进一步实现。
前述的电源转换方法，其中于步骤D后，更包含有一步骤，即重复执行步骤A至步骤D。
前述的电源转换方法，其中于步骤B中，该第一电感是透过该第一电容与该第二电感形成的共振电路，将其储能传导至该第二电容。
前述的电源转换方法，其中于步骤C中，该第一电容与该第二电感形成共振电路后，该第二电感的储能对该第一电容充能，而使该第二电容的跨压极性反转，且当该第二电感的跨压大于该第二电容的跨压时，该本质二极管导通，而进入步骤D。
本发明的目的更采用以下的技术方案来实现的。本发明更提供一种交直流转换的电源转换装置，用以将交流电源的电能转换后供给负载，且包括整流电路、第一电感、开关组件、二极管、第一电容、第二电感以及第二电容。其中，该整流电路具有输入侧以及输出侧，且该输入侧与该交流电源电性连接，用以将交流电源的电能转换成直流电能后自该输出侧输出；另外，该输出侧依据输出电能的极性而具有正电端以及负电端。该第一电感一端与该正电端连接。该开关组件一端连接至该第一电感另一端，而另一端则连接至该负电端。该二极管正极连接至该开关组件与该第一电感的连接处。该第一电容一端与该二极管的负极连接。该第二电感一端连接至该第一电容与该二极管的负极连接处，而另一端则连接至该第一电容的另 一端。该第二电容与该负载并联，且一端连接至该第二电感与该第一电容相连的另一端，而另一端则连接至该开关组件与该负电端的连接处。
本发明的目的还可以采用以下的技术措施来进一步实现。
前述的电源转换装置，其中该开关组件包含有并联连接的电子开关以及本质二极管，且该电子开关一端与该本质二极管的负极同时连接至该第一电感另一端，而该电子开关另一端与该本质二极管的正极则同时连接至该负电端。
本发明的目的又采用以下的技术方案来实现的。本发明又提供一种电源转换装置的交直流电源转换方法，包含有下列步骤：
A.导通该电子开关，使该整流电路输出的电能对该第一电感充能，且该第二电感、第一电容以及该第二电容的储能对该负载释能；
B.断开该电子开关，使该第一电感的储能对该第二电感、该第一电容与该二电容充能，使该第二电容的储能持续对该负载释能；
C.该第一电感停止释能，以使该第二电感的储能对该第一电容充能，而使该第一电容的跨压极性反转，且该第二电容的储能持续该负载释能；
D.导通该本质二极管，使该第一电容与该第二电感产生与前一步骤反向的电压，并对该第二电容充能，使该第二电容持续对该负载释能。
本发明的目的还可以采用以下的技术措施来进一步实现。
前述的电源转换方法，其中于步骤D后，更包含有一步骤，即重复执行步骤A至步骤D。
前述的电源转换方法，其中于步骤B中，该第一电感是透过该第一电容与该第二电感形成的共振电路，将其储能传导至该第二电容。
前述的电源转换方法，其中于步骤C中，该第一电容与该第二电感形成共振电路后，该第二电感的储能对该第一电容充能，而使该第二电容的跨压极性反转，且当该第二电感的跨压大于该第二电容的跨压时，该本质二极管导通，而进入步骤D。
借由上述技术方案，本发明的电源转换装置及其转换方法至少具有下列优点及有益效果：本发明的电源转换装置及其转换方法，可于直直流转换或是交直流电源转换时，有效地提高功率因子，且亦可有效地抑制输出给负载的电压涟波。
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，而可依照说明书的内容予以实施，并且为了让本发明的上述和其他目的、特征和优点能够更明显易懂，以下特举较佳实施例，并配合附图，详细说明如下。
附图的简要说明
图1为本发明第一较佳实施例的电路图；
图2至图5为图1于各步骤的等效电路图；
图6为本发明第二较佳实施例的电路图。
【主要元件符号说明】
10：整流电路
12：正电端
14：负电端
20：开关组件
100：交流电源
200：负载
300：直流电源
SW：电子开关
Dsw：本质二极管
L1、L2：电感
C1、C2：电容
D：二极管
实现发明的最佳方式
为更进一步阐述本发明为达成预定发明目的所采取的技术手段及功效，以下结合附图及较佳实施例，对依据本发明提出的一种电源转换装置及其转换方法其具体实施方式、结构、特征及其功效，详细说明如后。
请参图1所示，本发明第一较佳实施例的电源转换装置用以将交流电源100的电能转换后供给负载200，且包括整流电路10、开关组件20、独立二极管D、两个电感(第一电感L1及第二电感L2)以及两个电容(第一电容C1及第二电容C2)。上述各组件的连接关系如下所述：
该整流电路10于本实施例中为桥式整流器，且输入侧与该交流电源100连接，用以接收该交流电源100的电能后，转换成直流的电能并自其输出侧输出。另外，该输出侧依据供电的极性而区分有正电端12以及负电端14。当然，在实际实施上，除使用桥式整流器之外，亦可使用中间抽头式、真空管式或是其它架构的整流器来达到相同的目的。
该第一电感L1一端与该正电端12连接。
该开关组件20一端连接至该第一电感L1另一端，而另一端则连接至该负电端14。于本实施例中，该开关组件20包含有并联连接的电子开关SW以及本质二极管Dsw，且该电子开关SW一端与该本质二极管Dsw的负极同时连接至该第一电感L1另一端，而该电子开关SW另一端与该本质二极管Dsw的正极则同时连接至该负电端14。
该二极管D的正极连接至该电子开关SW与该第一电感L1的连接处。
该第一电容C1一端与该二极管D的负极连接。
该第二电感L2一端连接至该第一电容C1与该二极管D的负极连接处，而另一端则连接至该第一电容C1的另一端。
该第二电容C2与该负载200并联，且一端连接至该第二电感L2与该第一电容C1相连的另一端，而另一端则连接至该电子开关SW与该负电端14的连接处。
于本实施例中，所述电容C1～C2、所述电感L1～L2、输入电压、输出电压、该电子开关SW的切换频率以及该负载的规格如下表所示：
第一电感L1 200μH
第二电感L2 350μH
第一电容C1 8nF
第二电容C2 10μF
输入电压Vin 150V
输出电压Vout 180V
切换频率 100KHz
负载电阻 100Ω
借此，透过上述结构设计与规格，利用下述的电源转换方法，便可达到增进电源转换效率的目的，而该方法包含有下列步骤：
A.请参阅图2，导通该电子开关，使该整流电路输出的电能对该第一电感充能，且该第二电感、第一电容以及该第二电容的储能对该负载释能。
B.请参阅图3，断开该电子开关，使该第一电感的储能对该第二电感与该第一电容充能，并透过该第一电容C1与该第二电感L2形成的共振电路，将其储能传导至该第二电容C2，以使该第二电容C2持续对该负载200释能。
C.请参阅图4，当该第一电感停止释能时，第一电容与该第二电感形成共振电路，使该第二电感的储能对该第一电容充能，而使该第一电容的跨压极性反转，且该第二电容的储能持续该负载释能。
D.请参阅图5，当该第二电感的跨压大于该第二电容的跨压时，该本质二极管导通，使该第一电容与该第二电感产生与前一步骤反向的电压，并借以对该第二电容充能，使该第二电容持续对该负载释能。
每执行一次步骤A至步骤D后，则表示完成一次周期的动作。是以，在该电源转换装置持续动作的情况下，于步骤D后，便继续重复执行步骤A至步骤D，直至该电源转换装置停止动作。
借此，透过上述的设计，于每次动作周期中，该第一电容C1的跨压可自动地提供负电位，而导通该本质二极管Dsw，以使该本质二极管Dsw导通前后的整体电路结构改变，而可达到快速响应与低涟波输出电压的目的，同时可透过该电子开关SW的切换达到提升功率因子的目的。
另外，本发明除适用于交直流电源转换外，亦可如图6所示，省略整流电路10，并直接与直流电源300的正电端与负电端连接，同时利用前述的电源转换方法，便可达到直直流电源转换的目的，且同时可达到提升功率因子、快速响应与低涟波输出电压的效果。
以上所述仅为本发明较佳可行实施例而已，且在电气特性以及电路动作原理相同的情况下，前述各电路组件的设置位置以及数量、以及举凡应用本发明说明书及申请专利范围所为的等效电路变化，理应包含在本发明的专利范围内。

Claims (12)

  1. 一种电源转换装置，用以将直流电源的电能转换后供给负载，且该直流电源具有正电端以及负电端；其特征在于该电源转换装置包括：
    第一电感，其一端与该正电端连接；
    开关组件，一端连接至该第一电感另一端，而另一端则连接至该负电端；
    二极管，其正极连接至该开关组件与该第一电感的连接处；
    第一电容，其一端与该二极管的负极连接；
    第二电感，其一端连接至该第一电容与该二极管的负极连接处，而另一端则连接至该第一电容的另一端；及
    第二电容，与该负载并联，且一端连接至该第二电感与该第一电容相连的另一端，而另一端则连接至该开关组件与该负电端的连接处。
  2. 如权利要求1所述的电源转换装置，其特征在于其中，该开关组件包含有并联连接的电子开关以及本质二极管，且该电子开关一端与该本质二极管的负极同时连接至该第一电感另一端，而该电子开关另一端与该本质二极管的正极则同时连接至该负电端。
  3. 一种如权利要求2所述的电源转换装置的电源转换方法，其特征在于其包含有下列步骤：
    A.导通该电子开关，使该直流电源输出的电能对该第一电感充能，且该第二电感、第一电容以及该第二电容的储能对该负载释能；
    B.断开该电子开关，使该第一电感的储能对该第二电感、该第一电容与该第二电容充能，使该第二电容的储能持续对该负载释能；
    C.该第一电感停止释能，以使该第二电感的储能对该第一电容充能，而使该第一电容的跨压极性反转，且该第二电容的储能持续该负载释能；
    D.导通该本质二极管，使该第一电容与该第二电感产生与前一步骤反向的电压，并对该第二电容充能，使该第二电容持续对该负载释能。
  4. 如权利要求3所述的电源转换方法，其特征在于其中，于步骤D后，更包含有一步骤，即重复执行步骤A至步骤D。
  5. 如权利要求3所述的电源转换方法，其特征在于其中，于步骤B中，该第一电感是透过该第一电容与该第二电感形成的共振电路，将其储能传导至该第二电容。
  6. 如权利要求5所述的电源转换方法，其特征在于其中，于步骤C中，该第一电容与该第二电感形成共振电路后，该第二电感的储能对该第一电容充能，而使该第二电容的跨压极性反转，且当该第二电感的跨压大于该第二电容的跨压时，该本质二极管导通，而进入步骤D。
  7. 一种电源转换装置，用以将交流电源的电能转换后供给负载，其特征在于其包括：
    整流电路，具有输入侧以及输出侧，且该输入侧与该交流电源电性连接，用以将交流电源的电能转换成直流电能后自该输出侧输出；该输出侧依据输出电能的极性而具有正电端以及负电端；
    第一电感，其一端与该正电端连接；
    开关组件，其一端连接至该第一电感另一端，而另一端连接至该负电端；
    二极管，其正极连接至该开关组件与该第一电感的连接处；
    第一电容，其一端与该二极管的负极连接；
    第二电感，其一端连接至该第一电容与该二极管的负极连接处，而另一端则连接至该第一电容的另一端；及
    第二电容，与该负载并联，且一端连接至该第二电感与该第一电容相连的另一端，而另一端则连接至该开关组件与该负电端的连接处。
  8. 如权利要求7所述的电源转换装置，其特征在于其中，该开关组件包含有并联连接的电子开关以及本质二极管，且该电子开关一端与该本质二极管的负极同时连接至该第一电感另一端，而该电子开关另一端与该本质二极管的正极则同时连接至该负电端。
  9. 一种如权利要求8所述的电源转换装置的电源转换方法，其特征在于其包含有下列步骤：
    A.导通该电子开关，使该整流电路输出的电能对该第一电感充能，且该第二电感、第一电容以及该第二电容的储能对该负载释能；
    B.断开该电子开关，使该第一电感的储能对该第二电感、该第一电容与该二电容充能，使该第二电容的储能持续对该负载释能；
    C.该第一电感停止释能，以使该第二电感的储能对该第一电容充能，而使该第一电容的跨压极性反转，且该第二电容的储能持续该负载释能；
    D.导通该本质二极管，使该第一电容与该第二电感产生与前一步骤反向的电压，并对该第二电容充能，使该第二电容持续对该负载释能。
  10. 如权利要求9所述的电源转换方法，其特征在于其中，于步骤D后，更包含有一步骤，即重复执行步骤A至步骤D。
  11. 如权利要求9所述的电源转换方法，其特征在于其中，于步骤B中，该第一电感是透过该第一电容与该第二电感形成的共振电路，将其储能传导至该第二电容。
  12. 如权利要求11所述的电源转换方法，其特征在于其中，于步骤C中，该第一电容与该第二电感形成共振电路后，该第二电感的储能对该第一电容充能，而使该第二电容的跨压极性反转，且当该第二电感的跨压大于该第二电容的跨压时，该本质二极管导通，而进入步骤D。
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