TWI737013B - Method for controlling auxiliary circuit of power convertor - Google Patents

Method for controlling auxiliary circuit of power convertor Download PDF

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TWI737013B
TWI737013B TW108138126A TW108138126A TWI737013B TW I737013 B TWI737013 B TW I737013B TW 108138126 A TW108138126 A TW 108138126A TW 108138126 A TW108138126 A TW 108138126A TW I737013 B TWI737013 B TW I737013B
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auxiliary
power switch
mutual inductance
electrically connected
auxiliary power
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TW108138126A
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TW202118204A (en
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鄧人豪
陳仕賢
劉濱瀚
欒尚文
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國立中山大學
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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
    • 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

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Abstract

An auxiliary circuit of a power converter includes an auxiliary mutual inductance, a first auxiliary power switch, a second auxiliary power switch, a third auxiliary power switch and a forth auxiliary power switch. The auxiliary mutual inductance comprises a first end and a second end, and the auxiliary mutual inductance and the mutual inductance of the power converter are mutually induced. One end of the first auxiliary power switch is electrically connected with a first node, and the other end is electrically connected with the first end of the auxiliary mutual inductance. One end of the second auxiliary power switch is electrically connected with the first node, and the other end is electrically connected with the second end of the auxiliary mutual inductance. One end of the third auxiliary power switch is electrically connected with the first end of the auxiliary mutual inductance, and the other end is electrically connected with a second node. One end of the fourth auxiliary power switch is electrically connected with the second end of the auxiliary mutual inductance, and the other end is electrically connected with the second node.

Description

電源轉換器之輔助電路的控制方法 Control method of auxiliary circuit of power converter

本發明是關於一種電源轉換器，特別是關於一種電源轉換器之輔助電路及輔助電路之控制方法。 The present invention relates to a power converter, in particular to an auxiliary circuit of the power converter and a control method of the auxiliary circuit.

電力電子發展至今，各類型之電源轉換器已發展得相當成熟，而隨著環保議題越趨重視，電源轉換器之轉換效率的提升也成了節能的重要課題之一。其中，LLC諧振轉換器在高頻操作下具有一次側開關零電壓切換且二次側整流元件零電流切換之特點，可大幅提升系統之轉換效率，LLC諧振轉換器之變壓器激磁感值的增加有助於諧振槽激磁感電流的降低，而可減少導通損失，但在輕載情況下減少導通損失的效果卻相當有限，相同的情形也會發生在具有變壓器之轉換器，例如相移全橋轉換器、SRC(Serious Resonant Converter)或PRC(Parallel Resonant converter)...等。 Since the development of power electronics, various types of power converters have developed quite maturely, and as environmental issues have become more and more important, the improvement of the conversion efficiency of power converters has become one of the important topics of energy saving. Among them, the LLC resonant converter has the characteristics of zero voltage switching of the primary side switch and zero current switching of the secondary side rectifier element under high-frequency operation, which can greatly improve the conversion efficiency of the system. The increase in the magnetizing inductance of the transformer of the LLC resonant converter is Helps reduce the excitation current of the resonant tank, and can reduce the conduction loss, but the effect of reducing the conduction loss under light load conditions is quite limited. The same situation can also occur in converters with transformers, such as phase-shifted full-bridge conversion. , SRC (Serious Resonant Converter) or PRC (Parallel Resonant converter)...etc.

本發明的主要目的在於提供一電源轉換器之輔助電路，其藉由多個輔助功率開關的控制，以選擇性地讓與電源轉換器之互感相互感應之輔助互感的跨壓是否為零，而可改變電源轉換器之諧振槽的等效諧振電感大小，使電源 感應器之諧振頻率能夠在不同負載情況下改變，達成全載之效率提升。 The main purpose of the present invention is to provide an auxiliary circuit of a power converter, which is controlled by a plurality of auxiliary power switches to selectively make the cross voltage of the auxiliary mutual inductance of the mutual inductance of the power converter zero, and The equivalent resonant inductance of the resonant tank of the power converter can be changed to make the power The resonant frequency of the inductor can be changed under different load conditions to achieve a full load efficiency improvement.

本發明之一種電源轉換器之輔助電路包含一輔助互感、一第一輔助功率開關、一第二輔助功率開關、一第三輔助功率開關及一第四輔助功率開關，該輔助互感具有一第一端及一第二端，該輔助互感與該電源轉換器之該互感相互感應，該第一輔助功率開關之一端電性連接至一第一節點，另一端電性連接至該輔助互感之該第一端，該第二輔助功率開關之一端電性連接至該第一節點，另一端電性連接至該輔助互感之該第二端，該第三輔助功率開關之一端電性連接至該輔助互感之該第一端，另一端電性連接至一第二節點，該第四輔助功率開關之一端電性連接至該輔助互感之該第二端，另一端電性連接至該第二節點。 An auxiliary circuit of a power converter of the present invention includes an auxiliary mutual inductance, a first auxiliary power switch, a second auxiliary power switch, a third auxiliary power switch, and a fourth auxiliary power switch. The auxiliary mutual inductance has a first auxiliary power switch. Terminal and a second terminal, the auxiliary mutual inductance and the mutual inductance of the power converter induce each other, one end of the first auxiliary power switch is electrically connected to a first node, and the other end is electrically connected to the first node of the auxiliary mutual inductance At one end, one end of the second auxiliary power switch is electrically connected to the first node, the other end is electrically connected to the second end of the auxiliary mutual inductance, and one end of the third auxiliary power switch is electrically connected to the auxiliary mutual inductance The first end and the other end are electrically connected to a second node, one end of the fourth auxiliary power switch is electrically connected to the second end of the auxiliary mutual inductance, and the other end is electrically connected to the second node.

本發明之一種輔助電路的控制方法包含：於該電源轉換器之一正半周能量傳遞區間中，截止該第一、第二及第三輔助功率開關並導通該第四輔助功率開關，使該輔助互感、該第四輔助功率開關及該第三輔助功率開關之一背接二極體構成一電流迴路，且該輔助互感之一跨壓實質為零；以及於該電源轉換器之一負半周能量傳遞區間中，截止該第一、第二及第四輔助功率開關並導通該第三輔助功率開關，使該輔助互感、該第三輔助功率開關、該第四輔助功率開關之一背接二極體構成一電流迴路，且該輔助互感之一跨壓實質為零。 An auxiliary circuit control method of the present invention includes: in a positive half-cycle energy transfer interval of the power converter, turning off the first, second, and third auxiliary power switches and turning on the fourth auxiliary power switch, so that the auxiliary Mutual inductance, one of the fourth auxiliary power switch and one of the third auxiliary power switch is connected to the back of the diode to form a current loop, and one of the auxiliary mutual inductances is substantially zero; and a negative half cycle energy of the power converter In the transmission interval, the first, second, and fourth auxiliary power switches are turned off and the third auxiliary power switch is turned on, so that one of the auxiliary mutual inductance, the third auxiliary power switch, and the fourth auxiliary power switch is back-connected to two poles The body constitutes a current loop, and one of the auxiliary mutual inductances is substantially zero.

本發明之一種輔助電路的控制方法包含：於該電源轉換器之一正半周能量傳遞區間中，截止該第二及第三輔助功率開關並導通該第一、第四輔助功率開關，使該電源轉換器之一輸入電壓、該第一輔助功率開關、該輔助互感及該第四輔助功率開關構成一電流迴路，且該輔助互感之一跨壓實質為該輸入電壓之電壓大小；以及於該電源轉換器之一負半周能量傳遞區間中，截止該第一及第四輔助功率開關並導通該第二及第三輔助功率開關，使該電源轉換器之該輸 入電壓、該第二輔助功率開關、該輔助互感及該第三輔助功率開關構成一電流迴路，且該輔助互感之一跨壓實質為該輸入電壓之電壓大小。 An auxiliary circuit control method of the present invention includes: in a positive half-cycle energy transfer interval of the power converter, turning off the second and third auxiliary power switches and turning on the first and fourth auxiliary power switches to make the power supply An input voltage of the converter, the first auxiliary power switch, the auxiliary mutual inductance, and the fourth auxiliary power switch constitute a current loop, and a cross-voltage of the auxiliary mutual inductance is essentially the magnitude of the input voltage; and in the power supply In a negative half-cycle energy transfer interval of the converter, the first and fourth auxiliary power switches are turned off and the second and third auxiliary power switches are turned on, so that the output of the power converter is The input voltage, the second auxiliary power switch, the auxiliary mutual inductance, and the third auxiliary power switch constitute a current loop, and a cross voltage of the auxiliary mutual inductance is substantially the magnitude of the input voltage.

本發明一種輔助電路的控制方法包含：於該電源轉換器之一正半周能量傳遞區間中，截止該第一及第四輔助功率開關並導通該第二及第三輔助功率開關，使該電源轉換器之該輸入電壓、該第二輔助功率開關、該輔助互感及該第三輔助功率開關構成一電流迴路，且該輔助互感之一跨壓實質為該輸入電壓之電壓大小；以及於該電源轉換器之一負半周能量傳遞區間中，截止該第二及第三輔助功率開關並導通該第一、第四輔助功率開關，使該電源轉換器之一輸入電壓、該第一輔助功率開關、該輔助互感及該第四輔助功率開關構成一電流迴路，且該輔助互感之一跨壓實質為該輸入電壓之電壓大小。 An auxiliary circuit control method of the present invention includes: in a positive half-cycle energy transfer interval of the power converter, turning off the first and fourth auxiliary power switches and turning on the second and third auxiliary power switches, so that the power is converted The input voltage of the device, the second auxiliary power switch, the auxiliary mutual inductance, and the third auxiliary power switch constitute a current loop, and a cross voltage of the auxiliary mutual inductance is essentially the magnitude of the input voltage; and in the power conversion In the negative half-cycle energy transfer interval of one of the power converters, the second and third auxiliary power switches are turned off and the first and fourth auxiliary power switches are turned on, so that an input voltage of the power converter, the first auxiliary power switch, the The auxiliary mutual inductance and the fourth auxiliary power switch constitute a current loop, and a cross-voltage of the auxiliary mutual inductance is essentially the magnitude of the input voltage.

本發明藉由該輔助電路之該些輔助功率開關的控制，可改變該電源轉換器之諧振槽的等效電感值，而能夠在不同負載情況下讓諧振槽操作於最合適之諧振頻率，以提升該電源轉換器全載之轉換效率。此外，本發明藉由該輔助電路之該些輔助功率開關的控制，可在該電源轉換器之輸出電壓過低或過高時進行調整，以提高或降低該電源轉換器的增益，而有更廣泛的應用。 Through the control of the auxiliary power switches of the auxiliary circuit, the present invention can change the equivalent inductance value of the resonant tank of the power converter, and can operate the resonant tank at the most suitable resonant frequency under different load conditions. Improve the conversion efficiency of the power converter at full load. In addition, the present invention, through the control of the auxiliary power switches of the auxiliary circuit, can be adjusted when the output voltage of the power converter is too low or too high, so as to increase or decrease the gain of the power converter. Wide range of applications.

100:電源轉換器 100: power converter

110:輸入電壓 110: Input voltage

120:第一功率開關 120: The first power switch

121:背接二極體 121: Back to Diode

122:寄生電容 122: Parasitic capacitance

130:第二功率開關 130: second power switch

131:背接二極體 131: Back Diode

132:寄生電容 132: Parasitic capacitance

140:諧振電容 140: Resonant capacitor

150:第一激磁電感 150: first magnetizing inductance

160:第一互感 160: first mutual inductance

170:諧振電感 170: Resonant inductor

180:第二激磁電感 180: second magnetizing inductance

190:第二互感 190: Second Mutual Inductance

200:輔助電路 200: auxiliary circuit

210:輔助互感 210: auxiliary mutual inductance

211:第一端 211: first end

212:第二端 212: second end

220:第一輔助功率開關 220: First auxiliary power switch

221:背接二極體 221: Back Diode

222:寄生電容 222: Parasitic capacitance

230:第二輔助功率開關 230: second auxiliary power switch

231:背接二極體 231: Back Diode

232:寄生電容 232: Parasitic capacitance

240:第三輔助功率開關 240: Third auxiliary power switch

241:背接二極體 241: Back Diode

242:寄生電容 242: Parasitic capacitance

250:第四輔助功率開關 250: Fourth auxiliary power switch

251:背接二極體 251: Back Diode

252:寄生電容 252: Parasitic capacitance

300:輸出電路 300: output circuit

310:第一抽頭互感 310: first tap mutual inductance

320:第二抽頭互感 320: second tap mutual inductance

330:第一二極體 330: first diode

340:第二二極體 340: second diode

350:輸出電容 350: output capacitor

351:第一輸出端 351: First output

352:第二輸出端 352: second output

360:負載 360: load

N1:第一節點 N1: the first node

N2:第二節點 N2: second node

Nr:諧振節點 Nr: resonance node

第1圖：依據本發明之一實施例，一電源轉換器之輔助電路的電路圖。 Figure 1: A circuit diagram of an auxiliary circuit of a power converter according to an embodiment of the present invention.

第2圖：依據本發明之一實施例，該電源轉換器之輔助電路的電路作動圖。 Figure 2: According to an embodiment of the present invention, the circuit diagram of the auxiliary circuit of the power converter.

第3圖：依據本發明之一實施例，該電源轉換器的電路圖。 Figure 3: A circuit diagram of the power converter according to an embodiment of the present invention.

第4至12圖：依據本發明之一實施例，該電源轉換器的電路作動圖。 Figures 4 to 12: according to an embodiment of the present invention, the circuit diagram of the power converter.

第13圖：依據本發明之一實施例，該電源轉換器之輔助電路的電路作動圖。 Figure 13: According to an embodiment of the present invention, the circuit diagram of the auxiliary circuit of the power converter.

第14圖：依據本發明之一實施例，該電源轉換器之輔助電路的電路作動圖。 Figure 14: According to an embodiment of the present invention, the circuit diagram of the auxiliary circuit of the power converter.

請參閱第1圖，其為本發明之一實施例，一種電源轉換器之轉換電路200之電路圖，該輔助電路200包含一輔助互感210、一第一輔助功率開關220、一第二輔助功率開關230、一第三輔助功率開關240及一第四輔助功率開關250，其中，該輔助互感210具有一第一端211及一第二端212，該輔助互感210與該電源轉換器100之互感相互感應，該第一輔助功率開關220之一端電性連接至一第一節點N1，該第一輔助功率開關220之另一端電性連接至該輔助互感210之該第一端211，該第二輔助功率開關230之一端電性連接至該第一節點N1，該第二輔助功率開關230之另一端電性連接至該輔助互感210之該第二端212，該第三輔助功率開關240之一端電性連接至該輔助互感210之該第一端211，該第三輔助功率開關240之另一端電性連接至一第二節點N2，該第四輔助功率開關250之一端電性連接至該輔助互感210之該第二端212，該第四輔助功率開關250之另一端電性連接至該第二節點N2。在本實施例中，該第一、第二、第三及第四輔助功率開關皆為N-type MOSFET(Metal-Oxide-Semiconductor Field-Effect Transistor)。 Please refer to Figure 1, which is an embodiment of the present invention, a circuit diagram of a conversion circuit 200 of a power converter. The auxiliary circuit 200 includes an auxiliary mutual inductance 210, a first auxiliary power switch 220, and a second auxiliary power switch 230. A third auxiliary power switch 240 and a fourth auxiliary power switch 250, wherein the auxiliary mutual inductance 210 has a first end 211 and a second end 212, and the mutual inductance between the auxiliary mutual inductance 210 and the power converter 100 Inductively, one end of the first auxiliary power switch 220 is electrically connected to a first node N1, the other end of the first auxiliary power switch 220 is electrically connected to the first end 211 of the auxiliary mutual inductance 210, and the second auxiliary power switch 220 One end of the power switch 230 is electrically connected to the first node N1, the other end of the second auxiliary power switch 230 is electrically connected to the second end 212 of the auxiliary mutual inductance 210, and one end of the third auxiliary power switch 240 is electrically connected Is electrically connected to the first end 211 of the auxiliary mutual inductance 210, the other end of the third auxiliary power switch 240 is electrically connected to a second node N2, and one end of the fourth auxiliary power switch 250 is electrically connected to the auxiliary mutual inductance The second terminal 212 of 210 and the other terminal of the fourth auxiliary power switch 250 are electrically connected to the second node N2. In this embodiment, the first, second, third and fourth auxiliary power switches are all N-type MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistor).

請參閱第1圖，該第一、第二、第三及第四輔助功率開關220、230、240、250皆具有一背接二極體及一寄生電容，其中，該第一輔助功率開關220之該背接二極體221之負極端電性連接該第一節點N1，該第一輔助功率開關220之該背接二極體221之正極端電性連接該輔助互感210之該第一端211。該第二輔助功率開關230之該背接二極體231之負極端電性連接該第一節點N1，該第二輔助 功率開關230之該背接二極體231之正極端電性連接該輔助互感210之該第二端212。該第三輔助功率開關240之該背接二極體241之正極端電性連接該第二節點N2，該第三輔助功率開關240之該背接二極體241之負極端電性連接該輔助互感210之該第一端211。該第四輔助功率開關250之該背接二極體251之正極端電性連接該第二節點N2，該第四輔助功率開關250之該背接二極體251之負極端電性連接該輔助互感210之該第二端212。各該寄生電容222、232、242、252分別並聯各該背接二極體221、231、241、251。 Please refer to Figure 1, the first, second, third and fourth auxiliary power switches 220, 230, 240, 250 all have a back-connected diode and a parasitic capacitance, wherein the first auxiliary power switch 220 The negative terminal of the back diode 221 is electrically connected to the first node N1, and the positive terminal of the back diode 221 of the first auxiliary power switch 220 is electrically connected to the first terminal of the auxiliary mutual inductance 210 211. The negative terminal of the back diode 231 of the second auxiliary power switch 230 is electrically connected to the first node N1, and the second auxiliary power switch 230 is electrically connected to the first node N1. The positive terminal of the back diode 231 of the power switch 230 is electrically connected to the second terminal 212 of the auxiliary mutual inductance 210. The positive terminal of the back diode 241 of the third auxiliary power switch 240 is electrically connected to the second node N2, and the negative terminal of the back diode 241 of the third auxiliary power switch 240 is electrically connected to the auxiliary The first end 211 of the mutual inductance 210. The positive terminal of the back diode 251 of the fourth auxiliary power switch 250 is electrically connected to the second node N2, and the negative terminal of the back diode 251 of the fourth auxiliary power switch 250 is electrically connected to the auxiliary The second end 212 of the mutual inductance 210. The parasitic capacitors 222, 232, 242, and 252 are connected in parallel to the back-connected diodes 221, 231, 241, and 251, respectively.

請參閱第2圖，當該輔助電路200之該第一輔助功率開關220、該第二輔助功率開關230及該第三輔助功率開關240截止且該第四輔助功率開關250導通時，若該電源轉換器100之互感有一電流由其打點端流入，該輔助電感212會有一電流由其打點端流出，使該輔助電路200之該輔助電感210、該第四輔助功率開關250及該第三輔助功率開關240之該背接二極體241構成一電流迴路，此時，該輔助電感210的跨壓為零，而經由該輔助互感210與該電源轉換器100之互感相互感應後，可讓該電源轉換器100之互感的跨壓亦為零而不參與該電源轉換器100之諧振槽的諧振，達成諧振槽之等效電感值可變之功效，而能在負載端在不同負載大小的情況下將諧振槽調整為最適當之諧振頻率。 Please refer to Figure 2, when the first auxiliary power switch 220, the second auxiliary power switch 230, and the third auxiliary power switch 240 of the auxiliary circuit 200 are turned off and the fourth auxiliary power switch 250 is turned on, if the power supply The mutual inductance of the converter 100 has a current flowing in from its dotted end, and the auxiliary inductor 212 will have a current flowing out of its dotted end, so that the auxiliary inductor 210 of the auxiliary circuit 200, the fourth auxiliary power switch 250, and the third auxiliary power The back-connected diode 241 of the switch 240 forms a current loop. At this time, the cross voltage of the auxiliary inductor 210 is zero, and the mutual inductance of the auxiliary mutual inductance 210 and the power converter 100 can allow the power supply The cross voltage of the mutual inductance of the converter 100 is also zero and does not participate in the resonance of the resonant tank of the power converter 100, achieving the effect of changing the equivalent inductance value of the resonant tank, and can be used at the load end under different load sizes. Adjust the resonance tank to the most appropriate resonance frequency.

請參閱第3圖，其為該電源轉換器100之一實施例，在本實施例中，該電源轉換器100為一LLC諧振轉換器，其中該電源轉換器100具有一輸入電壓110、一第一功率開關120、一第二功率開關130、一諧振電容140、一第一激磁電感150、一第一互感160、一諧振電感170、一第二激磁電感180、一第二互感190及一輸出電路300。 Please refer to Figure 3, which is an embodiment of the power converter 100. In this embodiment, the power converter 100 is an LLC resonant converter, wherein the power converter 100 has an input voltage 110, a first A power switch 120, a second power switch 130, a resonant capacitor 140, a first magnetizing inductance 150, a first mutual inductance 160, a resonant inductor 170, a second magnetizing inductance 180, a second mutual inductance 190, and an output Circuit 300.

該第一功率開關120之一端電性連接該輸入電壓110之一正極，該 第一功率開關120之另一端電性連接一諧振節點Nr，該第二功率開關130之一端電性連接該諧振節點Nr，該第二功率開關130之另一端電性連接該輸入電壓110之一負極，該諧振電容140之一端電性連接該諧振節點Nr，該諧振電容140之另一端電性連接該第一激磁電感150之一端，該第一激磁電感150之另一端電性連接該諧振電感170之一端，該第一互感160與該第一激磁電感150並聯，該諧振電感170之另一端電性連接該第二激磁電感180之一端，該第二激磁電感180之另一端電性連接該輸入電壓110之該負極，該第二互感190與該第二激磁電感180並聯。該第一互感160與該輸出電路300相互感應，該第二互感190與該輔助電路200之該輔助互感210相互感應。其中，該諧振電容140、該第一激磁電感150、該第一互感160、該諧振電感170、該第二激磁電感180及該第二互感190構成LLC諧振電轉器之諧振槽，且藉由該輔助電路200之該些輔助功率開關的控制，可讓該第二激磁電感180及該第二互感190的跨壓為零，以改變該諧振槽的等效電感值。 One end of the first power switch 120 is electrically connected to a positive pole of the input voltage 110, and the The other end of the first power switch 120 is electrically connected to a resonance node Nr, one end of the second power switch 130 is electrically connected to the resonance node Nr, and the other end of the second power switch 130 is electrically connected to one of the input voltage 110 Negative, one end of the resonant capacitor 140 is electrically connected to the resonant node Nr, the other end of the resonant capacitor 140 is electrically connected to one end of the first magnetizing inductor 150, and the other end of the first magnetizing inductor 150 is electrically connected to the resonant inductor 170, the first mutual inductance 160 is connected in parallel with the first magnetizing inductor 150, the other end of the resonant inductor 170 is electrically connected to one end of the second magnetizing inductor 180, and the other end of the second magnetizing inductor 180 is electrically connected to the The negative pole of the input voltage 110, the second mutual inductance 190 and the second magnetizing inductance 180 are connected in parallel. The first mutual inductance 160 and the output circuit 300 induce each other, and the second mutual inductance 190 and the auxiliary mutual inductance 210 of the auxiliary circuit 200 induce each other. Wherein, the resonant capacitor 140, the first magnetizing inductance 150, the first mutual inductance 160, the resonant inductor 170, the second magnetizing inductance 180, and the second mutual inductance 190 constitute the resonant tank of the LLC resonant converter, and through the The control of the auxiliary power switches of the auxiliary circuit 200 can make the cross voltage of the second magnetizing inductance 180 and the second mutual inductance 190 zero, so as to change the equivalent inductance value of the resonance tank.

請再參閱第3圖，該輸出電路300具有一第一抽頭互感310、一第二抽頭互感320、一第一二極體330、一第二二極體340、一輸出電容350及一負載360。該第一抽頭互感310之一端電性連接該第一二極體330之一端，該第一抽頭互感310之另一端電性連接該第二抽頭互感320之一端及該輸出電容350之一第二輸出端352，且該第一抽頭互感310與該第一互感160相互感應，該第一二極體330之另一端電性連接該輸出電容350之一第一輸出端351，該第二抽頭互感320之另一端電性連接該第二二極體340之一端，且該第二抽頭互感320與該第一互感160相互感應，該第二二極體340之另一端電性連接該輸出電容350之該第一輸出端351，該負載360之兩端分別電性連接該輸出電容350之該第一輸出端351及該第二輸出端352。 Please refer to Figure 3 again, the output circuit 300 has a first tap mutual inductance 310, a second tap mutual inductance 320, a first diode 330, a second diode 340, an output capacitor 350 and a load 360 . One end of the first tap mutual inductance 310 is electrically connected to one end of the first diode 330, and the other end of the first tap mutual inductance 310 is electrically connected to one end of the second tap mutual inductance 320 and one of the output capacitors 350. The output terminal 352, and the first tap mutual inductance 310 and the first mutual inductance 160 induce each other, the other end of the first diode 330 is electrically connected to a first output terminal 351 of the output capacitor 350, and the second tap mutual inductance The other end of 320 is electrically connected to one end of the second diode 340, and the second tap mutual inductance 320 and the first mutual inductance 160 are mutually induced, and the other end of the second diode 340 is electrically connected to the output capacitor 350 The two ends of the first output terminal 351 and the load 360 are respectively electrically connected to the first output terminal 351 and the second output terminal 352 of the output capacitor 350.

請參閱第4至12圖，為本實施例之該電源轉換器100不同階段的電路作動，其中第4至12圖之電路作動僅為該電源轉換器100四分之一個作動週期，而非完整之電路作動。 Please refer to Figures 4 to 12, which are the circuit actions of the power converter 100 in different stages of this embodiment. The circuit actions in Figures 4 to 12 are only one-fourth of the power converter 100 operating cycle, not Complete circuit operation.

請參閱第4圖，於一正半周能量傳遞區間中，該電源轉換器100之該第一功率開關120導通、該第二功率開關130截止，該輔助電路200之該第一、第二及第三輔助功率開關220、230、240截止、該第四輔助功率開關250導通。該電源轉換器100之該輸入電壓110、該第一功率開關120、該諧振電容140、該第一激磁電感150、該第一互感160、該諧振電感170、該第二激磁電感180及該第二互感190構成電流迴路。該輔助電路200之該輔助互感210、該第四輔助功率開關250及該第三輔助功率開關240之該背接二極體241構成電流迴路，使得該輔助互感210的跨壓為零，亦使該第一激磁電感150及該第一互感160的跨壓為零，而降低了諧振槽的等效電感值。 Please refer to FIG. 4, in a positive half-cycle energy transfer interval, the first power switch 120 of the power converter 100 is turned on, the second power switch 130 is turned off, and the first, second, and second power switches of the auxiliary circuit 200 The three auxiliary power switches 220, 230, and 240 are turned off, and the fourth auxiliary power switch 250 is turned on. The input voltage 110 of the power converter 100, the first power switch 120, the resonant capacitor 140, the first magnetizing inductor 150, the first mutual inductance 160, the resonant inductor 170, the second magnetizing inductor 180, and the first The two mutual inductances 190 constitute a current loop. The auxiliary mutual inductance 210 of the auxiliary circuit 200, the fourth auxiliary power switch 250, and the back-connected diode 241 of the third auxiliary power switch 240 constitute a current loop, so that the cross voltage of the auxiliary mutual inductance 210 is zero, which also makes The cross voltage of the first magnetizing inductance 150 and the first mutual inductance 160 is zero, which reduces the equivalent inductance value of the resonance tank.

請參閱第5圖，於一正半周能量傳遞之循環區間中，該電源轉換器100之該第一功率開關120導通、該第二功率開關130截止，該輔助電路200之該第一、第二及第三輔助功率開關220、230、240截止、該第四輔助功率開關250導通。此區間中，由於該諧振槽之諧振電流小於該第一激磁電感150的激磁電流，使諧振槽之諧振電流完全流入該第一激磁電感150，該第一互感160解耦，該輸出電路300由該輸出電容350提供能量至該負載360。此時，該電源轉換器100之該輸入電壓110、該第一功率開關120、該諧振電容140、該第一激磁電感150、該諧振電感170、該第二激磁電感180及該第二互感190構成電流迴路。該輔助電路200之該輔助互感210、該第四輔助功率開關250及該第三輔助功率開關240之該背接二極體241構成電流迴路，使得該輔助互感210的跨壓為零，亦使該第一激磁電感150及 該第一互感160的跨壓為零，讓此區間僅有該諧振電容140、該第一激磁電感150及該諧振電感170參與諧振。 Please refer to Figure 5. In a positive half-cycle energy transfer cycle, the first power switch 120 of the power converter 100 is turned on, the second power switch 130 is turned off, and the first and second power switches of the auxiliary circuit 200 are turned off. And the third auxiliary power switch 220, 230, 240 is turned off, and the fourth auxiliary power switch 250 is turned on. In this interval, since the resonant current of the resonant tank is smaller than the excitation current of the first magnetizing inductor 150, the resonant current of the resonant tank completely flows into the first magnetizing inductor 150, the first mutual inductance 160 is decoupled, and the output circuit 300 is decoupled from The output capacitor 350 provides energy to the load 360. At this time, the input voltage 110 of the power converter 100, the first power switch 120, the resonant capacitor 140, the first magnetizing inductor 150, the resonant inductor 170, the second magnetizing inductor 180, and the second mutual inductance 190 Form a current loop. The auxiliary mutual inductance 210 of the auxiliary circuit 200, the fourth auxiliary power switch 250, and the back-connected diode 241 of the third auxiliary power switch 240 constitute a current loop, so that the cross voltage of the auxiliary mutual inductance 210 is zero, which also makes The first magnetizing inductance 150 and The cross voltage of the first mutual inductance 160 is zero, so that only the resonant capacitor 140, the first magnetizing inductor 150 and the resonant inductor 170 participate in resonance in this interval.

請參閱第6圖，於一主開關零電壓切換區間中，該電源轉換器100之該第一功率開關120及該第二功率開關130截止，該輔助電路200之該第一、第二、第三及第四輔助功率開關220、230、240、250截止。此時，該第一互感160仍為解耦狀態，該輸入電壓110、該第一功率開關120之該寄生電容122、該諧振電容140、該第一激磁電感150、該諧振電感170、該第二激磁電感180及該第二互感190構成電流迴路而對該第一功率開關120之該寄生電容122充電。該第二功率開關130之該寄生電容132、該諧振電容140、該第一激磁電感150、該諧振電感170、該第二激磁電感180及該第二互感190構成電流迴路而對該第二功率開關130之該寄生電容132放電，此區間直至兩個該寄生電容122、132完成充放電結束，以達成該第二功率開關130的零電壓導通。另外，在此區間中，該輔助電路200之該輔助互感210、該第二輔助功率開關230之該寄生電容232、該輸入電壓110及該第三輔助功率開關240之該背接二極體241構成電流迴路而對該第二輔助功率開關230之該寄生電容232放電。該輔助互感210、該第四輔助功率開關250之該寄生電容252及該第三輔助功率開關240之該背接二極體241構成電流迴路而對該第四輔助功率開關250之該寄生電容252充電。 Please refer to FIG. 6, in a zero-voltage switching interval of the main switch, the first power switch 120 and the second power switch 130 of the power converter 100 are turned off, and the first, second, and second power switches of the auxiliary circuit 200 are turned off. The third and fourth auxiliary power switches 220, 230, 240, and 250 are turned off. At this time, the first mutual inductance 160 is still in a decoupling state, the input voltage 110, the parasitic capacitance 122 of the first power switch 120, the resonant capacitor 140, the first magnetizing inductance 150, the resonant inductance 170, and the second The two magnetizing inductors 180 and the second mutual inductance 190 form a current loop to charge the parasitic capacitance 122 of the first power switch 120. The parasitic capacitor 132, the resonant capacitor 140, the first magnetizing inductance 150, the resonant inductor 170, the second magnetizing inductance 180, and the second mutual inductance 190 of the second power switch 130 form a current loop for the second power The parasitic capacitor 132 of the switch 130 is discharged, and this interval is completed until the two parasitic capacitors 122 and 132 are fully charged and discharged, so as to achieve the zero voltage conduction of the second power switch 130. In addition, in this interval, the auxiliary mutual inductance 210 of the auxiliary circuit 200, the parasitic capacitance 232 of the second auxiliary power switch 230, the input voltage 110 and the back diode 241 of the third auxiliary power switch 240 A current loop is formed to discharge the parasitic capacitance 232 of the second auxiliary power switch 230. The auxiliary mutual inductance 210, the parasitic capacitance 252 of the fourth auxiliary power switch 250, and the back diode 241 of the third auxiliary power switch 240 form a current loop, and the parasitic capacitance 252 of the fourth auxiliary power switch 250 Charge.

請參閱第7圖，於一主開關零電壓切換及副開關寄生電容充放電區間中，該電源轉換器100之該第一功率開關120及該第二功率開關130截止，該輔助電路200之該第一、第二、第三及第四輔助功率開關220、230、240、250皆截止，該第一及第二功率開關120、130之兩個該寄生電容122、132已完成充放電而未有電流通過。此時，該第一互感160仍為解耦狀態，該諧振電容140、該第一激 磁電感150、該諧振電感170、該第二激磁電感180、該第二互感190及該第二功率開關130及該背接二極體131構成電流迴路。該輔助電路200之該輔助互感210、該第二輔助功率開關230之該寄生電容232、該輸入電壓110及該第三輔助功率開關240之該背接二極體241構成電流迴路而持續對該第二輔助功率開關230之該寄生電容232放電，該輔助互感210、該第四輔助功率開關250之該寄生電容252及該第三輔助功率開關240之該背接二極體241構成電流迴路而持續對該第四輔助功率開關250之該寄生電容252充電，此區間至兩個該寄生電容232、252完成放充電結束。 Please refer to Figure 7. In a main switch zero voltage switching and auxiliary switch parasitic capacitance charging and discharging interval, the first power switch 120 and the second power switch 130 of the power converter 100 are turned off, and the auxiliary circuit 200 The first, second, third, and fourth auxiliary power switches 220, 230, 240, and 250 are all turned off, and the parasitic capacitors 122, 132 of the first and second power switches 120, 130 have been charged and discharged. There is current passing. At this time, the first mutual inductance 160 is still in a decoupling state, and the resonant capacitor 140 and the first excitation The magnetic inductance 150, the resonant inductance 170, the second magnetizing inductance 180, the second mutual inductance 190, the second power switch 130 and the back diode 131 form a current loop. The auxiliary mutual inductance 210 of the auxiliary circuit 200, the parasitic capacitance 232 of the second auxiliary power switch 230, the input voltage 110, and the back-connected diode 241 of the third auxiliary power switch 240 form a current loop and continue to The parasitic capacitance 232 of the second auxiliary power switch 230 is discharged, the auxiliary mutual inductance 210, the parasitic capacitance 252 of the fourth auxiliary power switch 250, and the back-connected diode 241 of the third auxiliary power switch 240 form a current loop. The parasitic capacitor 252 of the fourth auxiliary power switch 250 is continuously charged, and the discharge and charging of the two parasitic capacitors 232 and 252 ends during this period.

請參閱第8圖，於一主開關零電壓切換及寄生電容完成充放電區間中，該電源轉換器100之該第一功率開關120及該第二功率開關130截止，該輔助電路200之該第一、第二、第三及第四輔助功率開關220、230、240、250皆截止。此時，該第一互感160仍為解耦狀態，該諧振電容140、該第一激磁電感150、該諧振電感170、該第二激磁電感180及該第二互感190構成電流迴路。該輔助電路200之該第二及第四輔助功率開關230、250之兩個該寄生電容232、252完成放充電，該輔助互感210、該第二輔助功率開關230之該背接二極體231、該輸入電壓110及該第三輔助功率開關240之該背接二極體241構成電流迴路，此區間至該第二功率開關130導通而結束。 Please refer to Figure 8. In the zero-voltage switching of the main switch and the completion of the parasitic capacitance charging and discharging interval, the first power switch 120 and the second power switch 130 of the power converter 100 are turned off, and the second power switch of the auxiliary circuit 200 is turned off. The first, second, third and fourth auxiliary power switches 220, 230, 240, 250 are all turned off. At this time, the first mutual inductance 160 is still in a decoupling state, and the resonant capacitor 140, the first magnetizing inductor 150, the resonant inductor 170, the second magnetizing inductor 180, and the second mutual inductor 190 form a current loop. The two parasitic capacitors 232, 252 of the second and fourth auxiliary power switches 230, 250 of the auxiliary circuit 200 are discharged and charged, and the auxiliary mutual inductance 210 and the back of the second auxiliary power switch 230 are connected to the diode 231 The input voltage 110 and the back-connected diode 241 of the third auxiliary power switch 240 constitute a current loop, and this interval ends when the second power switch 130 is turned on.

請參閱第9圖，於一負半周能量傳遞之換相區間中，該電源供應器100之該第一功率開關120截止，該第二功率開關130導通，該輔助電路200之該第一、第二、第三及第四輔助功率開關220、230、240、250皆截止。該電源供應器100之該諧振電容140、該第二功率開關130、該第二激磁電感180、該第二互感190、該諧振電感170、該第一激磁電感150及該第一互感160構成電流迴路，諧振 槽之諧振電流小於該第一激磁電感150之該激磁電流，該第一互感160與該輸出電路300重新耦合，該輸出電路300之該第二二極體340導通，電流由該第二抽頭互感320輸出並經由該第二二極體340傳送至該輸出電容350及該負載360。而該輔助電路200之該輔助互感210的電流仍下降中，該輔助互感210、該第二輔助功率開關230之該背接二極體231、該輸入電壓110及該第三輔助功率開關240之該背接二極體241構成電流迴路。 Please refer to Figure 9, in a negative half-cycle energy transfer period, the first power switch 120 of the power supply 100 is turned off, the second power switch 130 is turned on, and the first and second power switches of the auxiliary circuit 200 are turned off. 2. The third and fourth auxiliary power switches 220, 230, 240, 250 are all turned off. The resonant capacitor 140, the second power switch 130, the second magnetizing inductance 180, the second mutual inductance 190, the resonant inductor 170, the first magnetizing inductance 150, and the first mutual inductance 160 of the power supply 100 constitute a current Loop, resonance The resonant current of the tank is smaller than the exciting current of the first magnetizing inductance 150, the first mutual inductance 160 is re-coupled with the output circuit 300, the second diode 340 of the output circuit 300 is turned on, and the current is mutual inducted by the second tap The output 320 is transmitted to the output capacitor 350 and the load 360 through the second diode 340. While the current of the auxiliary mutual inductance 210 of the auxiliary circuit 200 is still decreasing, the auxiliary mutual inductance 210, the back-connected diode 231 of the second auxiliary power switch 230, the input voltage 110 and the third auxiliary power switch 240 The back-connected diode 241 forms a current loop.

請參閱第10圖，於一負半周能量傳遞之輔助電路參與諧振區間中，該電源供應器100之該第一功率開關120截止，該第二功率開關130導通，該輔助電路200之該第一、第二、第三及第四輔助功率開關220、230、240、250皆截止。該電源供應器100之該諧振電容140、該第二功率開關130、該第二激磁電感180、該第二互感190、該諧振電感170、該第一激磁電感150及該第一互感160構成電流迴路。而該輔助電路200之該輔助互感210的電流降至零，此時該第一、第二、第三及第四輔助功率開關220、230、240、250之該些寄生電容222、232、242、252映射至該電源轉換器100之諧振槽參與諧振。 Please refer to FIG. 10, in a negative half cycle energy transfer auxiliary circuit participating in the resonance interval, the first power switch 120 of the power supply 100 is turned off, the second power switch 130 is turned on, and the first power switch of the auxiliary circuit 200 is turned on. The second, third and fourth auxiliary power switches 220, 230, 240, 250 are all turned off. The resonant capacitor 140, the second power switch 130, the second magnetizing inductance 180, the second mutual inductance 190, the resonant inductor 170, the first magnetizing inductance 150, and the first mutual inductance 160 of the power supply 100 constitute a current Loop. And the current of the auxiliary mutual inductance 210 of the auxiliary circuit 200 drops to zero. At this time, the parasitic capacitances 222, 232, 242 of the first, second, third, and fourth auxiliary power switches 220, 230, 240, and 250 , 252 is mapped to the resonant tank of the power converter 100 to participate in resonance.

請參閱第11圖，於一負半周能量傳遞之輔助電路寄生電容充放電區間中，該電源供應器100之該第一功率開關120截止，該第二功率開關130導通，該輔助電路200之該第一、第二及第四輔助功率開關220、230、250截止，該第三輔助功率開關240導通。該電源供應器100之該諧振電容140、該第二功率開關130、該第二激磁電感180、該第二互感190、該諧振電感170、該第一激磁電感150及該第一互感160構成電流迴路。該輔助電路200之該輔助電感210、該第三輔助功率開關240、該輸入電壓110、該第二輔助功率開關230之該寄生電容232形成電流迴路，以對該第二輔助功率開關230之該寄生電容232充電，該輔助電感210、 該第三輔助功率開關240及該第四輔助功率開關250之該寄生電容252形成電流迴路，以對該第四輔助功率開關250之該寄生電容252放電。 Please refer to Figure 11, in a negative half cycle energy transfer auxiliary circuit parasitic capacitance charging and discharging interval, the first power switch 120 of the power supply 100 is turned off, the second power switch 130 is turned on, the auxiliary circuit 200 The first, second, and fourth auxiliary power switches 220, 230, and 250 are turned off, and the third auxiliary power switch 240 is turned on. The resonant capacitor 140, the second power switch 130, the second magnetizing inductance 180, the second mutual inductance 190, the resonant inductor 170, the first magnetizing inductance 150, and the first mutual inductance 160 of the power supply 100 constitute a current Loop. The auxiliary inductor 210 of the auxiliary circuit 200, the third auxiliary power switch 240, the input voltage 110, and the parasitic capacitance 232 of the second auxiliary power switch 230 form a current loop for the second auxiliary power switch 230 The parasitic capacitance 232 is charged, and the auxiliary inductor 210, The third auxiliary power switch 240 and the parasitic capacitance 252 of the fourth auxiliary power switch 250 form a current loop to discharge the parasitic capacitance 252 of the fourth auxiliary power switch 250.

請參閱第12圖，於一負半周能量傳遞區間中，該電源供應器100之該第一功率開關120截止，該第二功率開關130導通，該輔助電路200之該第一、第二及第四輔助功率開關220、230、250截止，該第三輔助功率開關240導通。該電源供應器100之該諧振電容140、該第二功率開關130、該第二激磁電感180、該第二互感190、該諧振電感170、該第一激磁電感150及該第一互感160構成電流迴路。而該輔助電路200之該輔助互感210、該第三輔助功率開關240及該第四輔助功率開關250之該背接二極體251構成電流迴路，使得該輔助互感210的跨壓為零，亦使該第一激磁電感150及該第一互感160的跨壓為零，相同地，可改變負半周能量傳遞之諧振槽的等效電感值。 Please refer to FIG. 12, in a negative half-cycle energy transfer interval, the first power switch 120 of the power supply 100 is turned off, the second power switch 130 is turned on, and the first, second, and second power switches of the auxiliary circuit 200 are turned off. The four auxiliary power switches 220, 230, and 250 are turned off, and the third auxiliary power switch 240 is turned on. The resonant capacitor 140, the second power switch 130, the second magnetizing inductance 180, the second mutual inductance 190, the resonant inductor 170, the first magnetizing inductance 150, and the first mutual inductance 160 of the power supply 100 constitute a current Loop. And the auxiliary mutual inductance 210 of the auxiliary circuit 200, the third auxiliary power switch 240, and the back-connected diode 251 of the fourth auxiliary power switch 250 form a current loop, so that the cross voltage of the auxiliary mutual inductance 210 is zero. Make the cross voltage of the first magnetizing inductance 150 and the first mutual inductance 160 zero, and similarly, the equivalent inductance value of the resonant tank for negative half-cycle energy transfer can be changed.

本發明藉由該輔助電路200之該些輔助功率開關的控制，可改變該電源轉換器100之諧振槽的等效電感值，而能夠在不同負載情況下讓諧振槽操作於最合適之諧振頻率，以提升該電源轉換器100全載之轉換效率。 The present invention can change the equivalent inductance value of the resonant tank of the power converter 100 through the control of the auxiliary power switches of the auxiliary circuit 200, so that the resonant tank can be operated at the most suitable resonant frequency under different load conditions. , In order to improve the conversion efficiency of the power converter 100 at full load.

請參閱第13圖，當該電源轉換器100之該輸入電壓110大小不足時，於該電源轉換器100之該正半周能量傳遞區間中，該電源轉換器100之該第一功率開關120導通、該第二功率開關130截止，而該輔助電路200截止該第二及第三輔助功率開關230、240並導通該第一及第四輔助功率開關220、250，使該電源轉換器100之該輸入電壓110、該第一輔助功率開關220、該輔助互感210及該第四輔助功率開關250構成一電流迴路，此時，該輔助互感210之一跨壓實質為該輸入電壓110之電壓大小，且該輔助互感210之該跨壓透過該輔助互感210及該第二互感190的相互感應而映射至該電源轉換器100，以提升該電源轉換器100於正半周能 量傳遞的等效輸入電壓。於該電源轉換器100之該負半周能量傳遞區間中，該電源轉換器100之該第一功率開關120截止、該第二功率開關130導通，而該輔助電路200截止該第一及第四輔助功率開關220、250並導通該第二及第三輔助功率開關230、240，使該電源轉換器100之該輸入電壓110、該第二輔助功率開關230、該輔助互感210及該第三輔助功率開關240構成一電流迴路，且該輔助互感210之一跨壓實質為該輸入電壓110之電壓大小，且該輔助互感210之該跨壓透過該輔助互感210及該第二互感190的相互感應而映射至該電源轉換器100，以提高該電源轉換器100於負半周能量傳遞的等效輸入電壓。 Please refer to Figure 13, when the input voltage 110 of the power converter 100 is insufficient, in the positive half-cycle energy transfer interval of the power converter 100, the first power switch 120 of the power converter 100 is turned on, The second power switch 130 is turned off, and the auxiliary circuit 200 turns off the second and third auxiliary power switches 230, 240 and turns on the first and fourth auxiliary power switches 220, 250, so that the input of the power converter 100 The voltage 110, the first auxiliary power switch 220, the auxiliary mutual inductance 210, and the fourth auxiliary power switch 250 form a current loop. At this time, a cross voltage of the auxiliary mutual inductance 210 is essentially the voltage of the input voltage 110, and The cross voltage of the auxiliary mutual inductance 210 is mapped to the power converter 100 through the mutual induction of the auxiliary mutual inductance 210 and the second mutual inductance 190, so as to improve the power converter 100 in the positive half cycle. The equivalent input voltage of the quantity transfer. In the negative half cycle energy transfer interval of the power converter 100, the first power switch 120 of the power converter 100 is turned off, the second power switch 130 is turned on, and the auxiliary circuit 200 turns off the first and fourth auxiliary The power switches 220, 250 also turn on the second and third auxiliary power switches 230, 240, so that the input voltage 110 of the power converter 100, the second auxiliary power switch 230, the auxiliary mutual inductance 210, and the third auxiliary power The switch 240 constitutes a current loop, and a cross voltage of the auxiliary mutual inductance 210 is actually the magnitude of the voltage of the input voltage 110, and the cross voltage of the auxiliary mutual inductance 210 is caused by mutual induction between the auxiliary mutual inductance 210 and the second mutual inductance 190 It is mapped to the power converter 100 to increase the equivalent input voltage of the power converter 100 for energy transfer in the negative half cycle.

請參閱第14圖，當該電源轉換器100之該輸入電壓110大小過高時，於該電源轉換器100之該正半周能量傳遞區間中，該電源轉換器100之該第一功率開關120導通、該第二功率開關130截止，而該輔助電路200截止該第一及第四輔助功率開關220、250並導通該第二及第三輔助功率開關230、240，使該電源轉換器100之該輸入電壓110、該第三輔助功率開關240、該輔助互感210及該第二輔助功率開關230構成一電流迴路，此時，該輔助互感210之一跨壓實質為該輸入電壓110之電壓大小，且該輔助互感210之該跨壓透過該輔助互感210及該第二互感190的相互感應而映射至該電源轉換器100，以降低該電源轉換器100於正半周能量傳遞的等效輸入電壓。於該電源轉換器100之該負半周能量傳遞區間中，該電源轉換器100之該第一功率開關120截止、該第二功率開關130導通，而該輔助電路200截止該第二及第三輔助功率開關230、240並導通該第一、第四輔助功率開關220、250，使該電源轉換器100之該輸入電壓110、該第一輔助功率開關220、該輔助互感210及該第四輔助功率開關250構成一電流迴路，且該輔助互感210之一跨壓實質為該輸入電壓110之電壓大小，且該輔助互感210之該跨壓透過該輔 助互感210及該第二互感190的相互感應而映射至該電源轉換器100，以降低該電源轉換器100於正半周能量傳遞的等效輸入電壓。 Please refer to FIG. 14, when the input voltage 110 of the power converter 100 is too high, the first power switch 120 of the power converter 100 is turned on in the positive half-cycle energy transfer interval of the power converter 100 , The second power switch 130 is turned off, and the auxiliary circuit 200 turns off the first and fourth auxiliary power switches 220, 250 and turns on the second and third auxiliary power switches 230, 240, so that the power converter 100 The input voltage 110, the third auxiliary power switch 240, the auxiliary mutual inductance 210, and the second auxiliary power switch 230 form a current loop. At this time, a cross voltage of the auxiliary mutual inductance 210 is essentially the voltage of the input voltage 110. And the cross voltage of the auxiliary mutual inductance 210 is mapped to the power converter 100 through the mutual induction of the auxiliary mutual inductance 210 and the second mutual inductance 190, so as to reduce the equivalent input voltage of the power converter 100 for energy transfer in the positive half cycle. In the negative half-cycle energy transfer interval of the power converter 100, the first power switch 120 of the power converter 100 is turned off, the second power switch 130 is turned on, and the auxiliary circuit 200 turns off the second and third auxiliary The power switches 230, 240 also turn on the first and fourth auxiliary power switches 220, 250, so that the input voltage 110 of the power converter 100, the first auxiliary power switch 220, the auxiliary mutual inductance 210, and the fourth auxiliary power The switch 250 constitutes a current loop, and a cross voltage of the auxiliary mutual inductance 210 is essentially the voltage of the input voltage 110, and the cross voltage of the auxiliary mutual inductance 210 passes through the auxiliary The mutual induction of the auxiliary mutual inductance 210 and the second mutual inductance 190 is mapped to the power converter 100 to reduce the equivalent input voltage of the power converter 100 during the positive half cycle of energy transfer.

本發明藉由該輔助電路200之該些輔助功率開關的控制，可在該電源轉換器100之輸出電壓110過低或過高時進行調整，以提高或降低該電源轉換器100的增益，而具有更廣泛的應用。 Through the control of the auxiliary power switches of the auxiliary circuit 200, the present invention can adjust when the output voltage 110 of the power converter 100 is too low or too high to increase or decrease the gain of the power converter 100, and Has a wider range of applications.

本發明之保護範圍當視後附之申請專利範圍所界定者為準，任何熟知此項技藝者，在不脫離本發明之精神和範圍內所作之任何變化與修改，均屬於本發明之保護範圍。 The scope of protection of the present invention shall be determined by the scope of the attached patent application. Anyone who is familiar with the art and makes any changes and modifications without departing from the spirit and scope of the present invention shall fall within the scope of protection of the present invention. .

100:電源轉換器 100: power converter

200:電源轉換器之輔助電路 200: Auxiliary circuit of power converter

210:輔助互感 210: auxiliary mutual inductance

211:第一端 211: first end

212:第二端 212: second end

220:第一輔助功率開關 220: First auxiliary power switch

221:背接二極體 221: Back Diode

222:寄生電容 222: Parasitic capacitance

230:第二輔助功率開關 230: second auxiliary power switch

231:背接二極體 231: Back Diode

232:寄生電容 232: Parasitic capacitance

240:第三輔助功率開關 240: Third auxiliary power switch

241:背接二極體 241: Back Diode

242:寄生電容 242: Parasitic capacitance

250:第四輔助功率開關 250: Fourth auxiliary power switch

251:背接二極體 251: Back Diode

252:寄生電容 252: Parasitic capacitance

N1:第一節點 N1: the first node

N2:第二節點 N2: second node

Claims (6)

一種電源轉換器之輔助電路的控制方法，該電源轉換器具有一互感，該輔助電路包含一輔助互感、一第一輔助功率開關、一第二輔助功率開關、一第三輔助功率開關及一第四輔助功率開關，該輔助互感具有一第一端及一第二端，該輔助互感與該電源轉換器之該互感相互感應，該第一輔助功率開關之一端電性連接至一第一節點，該第一輔助功率開關之另一端電性連接至該輔助互感之該第一端，該第二輔助功率開關之一端電性連接至該第一節點，該第二輔助功率開關之另一端電性連接至該輔助互感之該第二端，該第三輔助功率開關之一端電性連接至該輔助互感之該第一端，該第三輔助功率開關之另一端電性連接至一第二節點，該第四輔助功率開關之一端電性連接至該輔助互感之該第二端，該第四輔助功率開關之另一端電性連接至該第二節點，該控制方法包含：於該電源轉換器之一正半周能量傳遞區間中，截止該第一、第二及第三輔助功率開關並導通該第四輔助功率開關，使該輔助互感、該第四輔助功率開關及該第三輔助功率開關之一背接二極體構成一電流迴路，且該輔助互感之一跨壓實質為零；以及於該電源轉換器之一負半周能量傳遞區間中，截止該第一、第二及第四輔助功率開關並導通該第三輔助功率開關，使該輔助互感、該第三輔助功率開關、該第四輔助功率開關之一背接二極體構成一電流迴路，且該輔助互感之一跨壓實質為零。 A method for controlling an auxiliary circuit of a power converter. The power converter has a mutual inductance. The auxiliary circuit includes an auxiliary mutual inductance, a first auxiliary power switch, a second auxiliary power switch, a third auxiliary power switch, and a fourth auxiliary power switch. Auxiliary power switch, the auxiliary mutual inductance has a first end and a second end, the auxiliary mutual inductance and the mutual inductance of the power converter mutually induce each other, one end of the first auxiliary power switch is electrically connected to a first node, the The other end of the first auxiliary power switch is electrically connected to the first end of the auxiliary mutual inductance, one end of the second auxiliary power switch is electrically connected to the first node, and the other end of the second auxiliary power switch is electrically connected To the second end of the auxiliary mutual inductance, one end of the third auxiliary power switch is electrically connected to the first end of the auxiliary mutual inductance, the other end of the third auxiliary power switch is electrically connected to a second node, the One end of the fourth auxiliary power switch is electrically connected to the second end of the auxiliary mutual inductance, and the other end of the fourth auxiliary power switch is electrically connected to the second node. The control method includes: in one of the power converters In the positive half-cycle energy transfer interval, the first, second, and third auxiliary power switches are turned off and the fourth auxiliary power switch is turned on, so that one of the auxiliary mutual inductance, the fourth auxiliary power switch, and the third auxiliary power switch is reversed. The diode is connected to form a current loop, and one of the auxiliary mutual inductances is substantially zero; and in a negative half-cycle energy transfer interval of the power converter, the first, second, and fourth auxiliary power switches are turned off and The third auxiliary power switch is turned on, so that one of the auxiliary mutual inductance, the third auxiliary power switch, and the fourth auxiliary power switch is back-connected to a diode to form a current loop, and a cross voltage of the auxiliary mutual inductance is substantially zero. 如申請專利範圍第1項所述之電源轉換器之輔助電路的控制方法，其中該電源轉換器具有一輸入電壓、一第一功率開關、一第二功率開關、一諧振電容、一第一激磁電感、一第一互感、一諧振電感、一第二激磁電感及一第二互 感，該第一功率開關之一端電性連接該輸入電壓之一正極，該第一功率開關之另一端電性連接一諧振節點，該第二功率開關之一端電性連接該諧振節點，該第二功率開關之另一端電性連接該輸入電壓之一負極，該諧振電容之一端電性連接該諧振節點，該諧振電容之另一端電性連接該第一激磁電感之一端，該第一激磁電感之另一端電性連接該諧振電感之一端，該第一互感並聯該第一激磁電感，該諧振電感之另一端電性連接該第二激磁電感之一端，該第二激磁電感之另一端電性連接該輸入電壓之該負極，該第二互感並聯該第二激磁電感，其中該第一互感與一輸出電路相互感應，該第二互感與該輔助電路之該輔助互感相互感應。 The control method of the auxiliary circuit of the power converter as described in the scope of patent application, wherein the power converter has an input voltage, a first power switch, a second power switch, a resonant capacitor, and a first magnetizing inductance , A first mutual inductance, a resonant inductance, a second magnetizing inductance and a second mutual inductance One end of the first power switch is electrically connected to an anode of the input voltage, the other end of the first power switch is electrically connected to a resonance node, one end of the second power switch is electrically connected to the resonance node, and the first power switch is electrically connected to the resonance node. The other end of the two power switches is electrically connected to a negative electrode of the input voltage, one end of the resonant capacitor is electrically connected to the resonant node, and the other end of the resonant capacitor is electrically connected to one end of the first magnetizing inductor, the first magnetizing inductor The other end is electrically connected to one end of the resonant inductor, the first mutual inductance is connected in parallel with the first magnetizing inductor, the other end of the resonant inductor is electrically connected to one end of the second magnetizing inductor, and the other end of the second magnetizing inductor is electrically connected Connecting to the negative pole of the input voltage, the second mutual inductance is connected in parallel with the second magnetizing inductance, wherein the first mutual inductance and an output circuit induce each other, and the second mutual inductance and the auxiliary mutual inductance of the auxiliary circuit induce each other. 如申請專利範圍第2項所述之電源轉換器之輔助電路的控制方法，其中於該電源轉換器之該正半周能量傳遞區間中導通該第一功率開關並截止該第二功率開關，使該輸出電壓、該第一功率開關、該諧振電容、該第一激磁電感、該諧振電感、該第二激磁電感及該第二互感構成一電流路徑；於該電源轉換器之該負半周能量傳遞區間中截止該第一功率開關並導通該第二功率開關，使該諧振電容、該第二功率開關、該第二激磁電感、該第二互感、該諧振電感及該第一激磁電感構成一電流路徑。 The method for controlling the auxiliary circuit of the power converter as described in the scope of patent application, wherein the first power switch is turned on and the second power switch is turned off in the positive half-cycle energy transfer interval of the power converter, so that the The output voltage, the first power switch, the resonant capacitor, the first magnetizing inductance, the resonant inductor, the second magnetizing inductance, and the second mutual inductance form a current path; in the negative half-cycle energy transfer interval of the power converter The first power switch is turned off and the second power switch is turned on, so that the resonant capacitor, the second power switch, the second magnetizing inductance, the second mutual inductance, the resonant inductor, and the first magnetizing inductance form a current path . 如申請專利範圍第2項所述之電源轉換器之輔助電路的控制方法，其中該輸出電路具有一第一抽頭互感、一第二抽頭互感、一第一二極體、一第二二極體、一輸出電容及一負載，該第一抽頭互感之一端電性連接該第一二極體之一端，該第一抽頭互感之另一端電性連接該第二抽頭互感之一端及該輸出電容之一第二輸出端，該第一二極體之另一端電性連接該輸出電容之一第一輸出端，該第二抽頭互感之另一端電性連接該第二二極體之一端，該第二二極體之另一端電性連接該輸出電容之該第一輸出端，該負載之兩端分別電性連接該輸出電 容之該第一輸出端及該第二輸出端。 The control method of the auxiliary circuit of the power converter as described in the scope of patent application, wherein the output circuit has a first tap mutual inductance, a second tap mutual inductance, a first diode, and a second diode , An output capacitor and a load, one end of the first tap mutual inductance is electrically connected to one end of the first diode, and the other end of the first tap mutual inductance is electrically connected to one end of the second tap mutual inductance and the output capacitor A second output end, the other end of the first diode is electrically connected to a first output end of the output capacitor, the other end of the second tap mutual inductance is electrically connected to an end of the second diode, the first The other end of the two diodes is electrically connected to the first output end of the output capacitor, and both ends of the load are respectively electrically connected to the output circuit The first output terminal and the second output terminal are contained. 一種電源轉換器之輔助電路的控制方法，該電源轉換器具有一互感，該輔助電路包含一輔助互感、一第一輔助功率開關、一第二輔助功率開關、一第三輔助功率開關及一第四輔助功率開關，該輔助互感具有一第一端及一第二端，該輔助互感與該電源轉換器之該互感相互感應，該第一輔助功率開關之一端電性連接至一第一節點，該第一輔助功率開關之另一端電性連接至該輔助互感之該第一端，該第二輔助功率開關之一端電性連接至該第一節點，該第二輔助功率開關之另一端電性連接至該輔助互感之該第二端，該第三輔助功率開關之一端電性連接至該輔助互感之該第一端，該第三輔助功率開關之另一端電性連接至一第二節點，該第四輔助功率開關之一端電性連接至該輔助互感之該第二端，該第四輔助功率開關之另一端電性連接至該第二節點，該控制方法包含：於該電源轉換器之一正半周能量傳遞區間中，截止該第二及第三輔助功率開關並導通該第一、第四輔助功率開關，使該電源轉換器之一輸入電壓、該第一輔助功率開關、該輔助互感及該第四輔助功率開關構成一電流迴路，且該輔助互感之一跨壓實質為該輸入電壓之電壓大小；以及於該電源轉換器之一負半周能量傳遞區間中，截止該第一及第四輔助功率開關並導通該第二及第三輔助功率開關，使該電源轉換器之該輸入電壓、該第三輔助功率開關、該輔助互感及該第二輔助功率開關構成一電流迴路，且該輔助互感之一跨壓實質為該輸入電壓之電壓大小。 A method for controlling an auxiliary circuit of a power converter. The power converter has a mutual inductance. The auxiliary circuit includes an auxiliary mutual inductance, a first auxiliary power switch, a second auxiliary power switch, a third auxiliary power switch, and a fourth auxiliary power switch. Auxiliary power switch, the auxiliary mutual inductance has a first end and a second end, the auxiliary mutual inductance and the mutual inductance of the power converter mutually induce each other, one end of the first auxiliary power switch is electrically connected to a first node, the The other end of the first auxiliary power switch is electrically connected to the first end of the auxiliary mutual inductance, one end of the second auxiliary power switch is electrically connected to the first node, and the other end of the second auxiliary power switch is electrically connected To the second end of the auxiliary mutual inductance, one end of the third auxiliary power switch is electrically connected to the first end of the auxiliary mutual inductance, the other end of the third auxiliary power switch is electrically connected to a second node, the One end of the fourth auxiliary power switch is electrically connected to the second end of the auxiliary mutual inductance, and the other end of the fourth auxiliary power switch is electrically connected to the second node. The control method includes: in one of the power converters In the positive half-cycle energy transfer interval, the second and third auxiliary power switches are turned off and the first and fourth auxiliary power switches are turned on, so that an input voltage of the power converter, the first auxiliary power switch, the auxiliary mutual inductance and The fourth auxiliary power switch constitutes a current loop, and a cross voltage of the auxiliary mutual inductance is essentially the magnitude of the input voltage; and in a negative half-cycle energy transfer interval of the power converter, the first and fourth are cut off The auxiliary power switch turns on the second and third auxiliary power switches, so that the input voltage of the power converter, the third auxiliary power switch, the auxiliary mutual inductance, and the second auxiliary power switch form a current loop, and the auxiliary One of the cross voltages of mutual inductance is essentially the magnitude of the input voltage. 一種電源轉換器之輔助電路的控制方法，該電源轉換器具有一互感，該輔助電路包含一輔助互感、一第一輔助功率開關、一第二輔助功率開關、一第三輔助功率開關及一第四輔助功率開關，該輔助互感具有一第一端及一第 二端，該輔助互感與該電源轉換器之該互感相互感應，該第一輔助功率開關之一端電性連接至一第一節點，該第一輔助功率開關之另一端電性連接至該輔助互感之該第一端，該第二輔助功率開關之一端電性連接至該第一節點，該第二輔助功率開關之另一端電性連接至該輔助互感之該第二端，該第三輔助功率開關之一端電性連接至該輔助互感之該第一端，該第三輔助功率開關之另一端電性連接至一第二節點，該第四輔助功率開關之一端電性連接至該輔助互感之該第二端，該第四輔助功率開關之另一端電性連接至該第二節點，該控制方法包含：於該電源轉換器之一正半周能量傳遞區間中，截止該第一及第四輔助功率開關並導通該第二及第三輔助功率開關，使該電源轉換器之該輸入電壓、該第三輔助功率開關、該輔助互感及該第二輔助功率開關構成一電流迴路，且該輔助互感之一跨壓實質為該輸入電壓之電壓大小；以及於該電源轉換器之一負半周能量傳遞區間中，截止該第二及第三輔助功率開關並導通該第一、第四輔助功率開關，使該電源轉換器之一輸入電壓、該第一輔助功率開關、該輔助互感及該第四輔助功率開關構成一電流迴路，且該輔助互感之一跨壓實質為該輸入電壓之電壓大小。 A method for controlling an auxiliary circuit of a power converter. The power converter has a mutual inductance. The auxiliary circuit includes an auxiliary mutual inductance, a first auxiliary power switch, a second auxiliary power switch, a third auxiliary power switch, and a fourth auxiliary power switch. Auxiliary power switch, the auxiliary mutual inductance has a first end and a first At two ends, the auxiliary mutual inductance and the mutual inductance of the power converter are mutually induced, one end of the first auxiliary power switch is electrically connected to a first node, and the other end of the first auxiliary power switch is electrically connected to the auxiliary mutual inductance One end of the first end of the second auxiliary power switch is electrically connected to the first node, the other end of the second auxiliary power switch is electrically connected to the second end of the auxiliary mutual inductance, the third auxiliary power One end of the switch is electrically connected to the first end of the auxiliary mutual inductance, the other end of the third auxiliary power switch is electrically connected to a second node, and one end of the fourth auxiliary power switch is electrically connected to the auxiliary mutual inductance The second end, the other end of the fourth auxiliary power switch is electrically connected to the second node, and the control method includes: turning off the first and fourth auxiliary power switches in a positive half-cycle energy transfer interval of the power converter The power switch turns on the second and third auxiliary power switches, so that the input voltage of the power converter, the third auxiliary power switch, the auxiliary mutual inductance, and the second auxiliary power switch form a current loop, and the auxiliary mutual inductance A cross voltage is essentially the magnitude of the input voltage; and in a negative half-cycle energy transfer interval of the power converter, the second and third auxiliary power switches are turned off and the first and fourth auxiliary power switches are turned on, An input voltage of the power converter, the first auxiliary power switch, the auxiliary mutual inductance, and the fourth auxiliary power switch form a current loop, and a cross voltage of the auxiliary mutual inductance is substantially the magnitude of the input voltage.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201110526A (en) * 2009-09-10 2011-03-16 Atomic Energy Council Circuit of reducing power loss on switching
CN102170240A (en) * 2011-04-20 2011-08-31 浙江大学 Hybrid drive full-bridge synchronous rectifier
CN103580490A (en) * 2012-06-27 2014-02-12 株式会社日立信息通信工程 Dc-dc converter
CN103607150A (en) * 2013-09-30 2014-02-26 哈尔滨工业大学 Thrust compensation system for double winding voice coil motor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201110526A (en) * 2009-09-10 2011-03-16 Atomic Energy Council Circuit of reducing power loss on switching
CN102170240A (en) * 2011-04-20 2011-08-31 浙江大学 Hybrid drive full-bridge synchronous rectifier
CN103580490A (en) * 2012-06-27 2014-02-12 株式会社日立信息通信工程 Dc-dc converter
CN103607150A (en) * 2013-09-30 2014-02-26 哈尔滨工业大学 Thrust compensation system for double winding voice coil motor

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