TWI532305B - Parallel Resistive Resonant Converter Circuit with Current Sharing Function - Google Patents

Parallel Resistive Resonant Converter Circuit with Current Sharing Function Download PDF

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Publication number
TWI532305B
TWI532305B TW103121525A TW103121525A TWI532305B TW I532305 B TWI532305 B TW I532305B TW 103121525 A TW103121525 A TW 103121525A TW 103121525 A TW103121525 A TW 103121525A TW I532305 B TWI532305 B TW I532305B
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TW
Taiwan
Prior art keywords
transformer
resonant converter
resonant
sharing function
power input
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Application number
TW103121525A
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English (en)
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TW201601437A (zh
Inventor
Tsung Liang Hung
Ya Lun Ouyang
Yeu Torng Yau
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Asian Power Devices Inc
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Publication date
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Priority to TW103121525A priority Critical patent/TWI532305B/zh
Priority to US14/533,103 priority patent/US9236808B1/en
Publication of TW201601437A publication Critical patent/TW201601437A/zh
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Publication of TWI532305B publication Critical patent/TWI532305B/zh

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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
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • 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
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/285—Single converters with a plurality of output stages connected in parallel
    • 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
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Landscapes

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

Description

具均流功能的並聯式LLC諧振轉換器電路
本發明是有關於一種並聯式LLC諧振轉換器電路，且特別是有關於一種可平衡兩組LLC諧振轉換器電流的電路架構。
在DC/DC轉換器當中，LLC諧振轉換器(LLC Resonant converter)提供了良好的轉換效率，可以大幅減少半橋MOSFET的切換損耗，因此常常使用於中低瓦數下的DC/DC轉換器應用。如果欲使用LLC轉換器的架構於較高的功率轉換的應用時，可以透過並聯兩組元件參數相同之LLC轉換器的方式，分擔能量的轉換，進而達到低切換損、高轉換效率與高功率輸出的目的。然而並聯式的LLC轉換器之元件參數會因公差問題，導致兩相的諧振電流不平衡，使得其中一組LLC轉換器的輸出能量大於另外一組LLC轉換器。這種輸出電流不平衡的狀況在滿載時容易讓輸出能量較大的LLC轉換器超過其額定功率，造成該LLC轉換器之損毀。
因此，發明人鑒於習知技術的缺失，為解決習知的問題，乃思及改良的意念，提出一解決的技術。
有鑑於此，本發明之目的是提供一種具均流功能的並聯式LLC諧振轉換器電路，利用一平衡變壓器串聯於兩諧振轉換器之 間，進而使兩諧振轉換器的諧振電流可達到一致。
為達上述或其他目的，本發明提出一種具均流功能的並聯式LLC諧振轉換器電路，其包括：一電源輸入端、一輸出電容、一第一諧振轉換器、一第二諧振轉換器以及一第三變壓器。其中，該第一諧振轉換器及該第二諧振轉換器均分別耦接於該電源輸入端及該輸出電容，且分別各具有一第一變壓器及一第二電壓器。該第三變壓器的一繞線組耦接串聯於該電源輸入端與該第一變壓器之間，該第三變壓器的另一繞線組耦串聯於該電源輸入端與該第二變壓器之間。其中，該第三變壓器的圈比數為1：1的平衡變壓器，藉此使兩諧振轉換器的諧振電流可達到一致。
綜上所述，藉由本發明利用第三變壓器與該第一諧振轉換器的該第一變壓器及該第二諧振轉換器的該第二變壓器形成串聯而達到兩諧振轉換器的諧振電流一致的目的。
10‧‧‧電源輸入端
11‧‧‧電源輸出端
12‧‧‧輸出電容
13‧‧‧第一諧振轉換器
130‧‧‧第一變壓器
14‧‧‧第二諧振轉換器
140‧‧‧第二變壓器
15‧‧‧第三變壓器
圖1為本發明較佳實施例的電路示意圖。
為讓本發明之上述和其他目的、特徵和優點能更明顯易懂，下文特舉較佳實施例，並配合所附圖式，作詳細說明如下。
請參閱圖1所示，其為本發明較佳實施例的電路示意圖。本發明提出一種具均流功能的並聯式LLC諧振轉換器電路，其包括：一電源輸入端(10)、一電源輸出端(11)、一輸出電容(12)、 一第一諧振轉換器(13)、一第二諧振轉換器(14)以及一第三變壓器(15)。其中，圖中所顯示的該第一諧振轉換器(13)與該第二諧振轉換器(14)的電路僅是本案的實施例之一，非依此為限制。
該第一諧振轉換器(13)及該第二諧振轉換器(14)的一端均耦接於該電源輸入端(10)，而另一端則均耦接於該輸出電容(12)或該電源輸出端(11)，且分別各具有一第一變壓器(130)及一第二電壓器(140)。該第三變壓器(15)的一繞線組以串聯方式耦接於該電源輸入端(10)與該第一變壓器(130)之間，該第三變壓器的另一繞線組以串聯方式耦接於該電源輸入端(10)與該第二變壓器(140)之間。其中，該第三變壓器(15)的圈比數為1：1的平衡變壓器。
藉由該第三變壓器(15)的圈比數為1：1的平衡變壓器，且以串聯的方式耦接於該第一變壓器(130)及該第二變壓器(140)的迴路上，因此可強制流進與流出該第一變壓器(130)及該第二變壓器(140)的電流相等。即使該第一諧振轉換器(13)、該第二諧振轉換器(14)以及LLC轉換器上的電器元件有公差(如電感的電感值不同)，該第三變壓器(15)也可以平衡該第一諧振轉換器(13)及該第二諧振轉換器(14)的諧振電流。由此可見，讓兩呈現並聯式的該第一諧振轉換器(13)及該第二諧振轉換器(14)有均等電流輸出，可以避免當在滿載時因電流不平衡而造成其中的諧振轉換器超過所設計的額定功率。
其中，該具均流功能的並聯式LLC諧振轉換器電路進一步可包括有三個以上的LLC諧振轉換器，而該第三變壓器(15)中的繞線組的數量則是與LLC諧振轉換器的數量相呼應，且每一繞線組的圈數比都為相同。藉此，可使多組的LLC諧振轉換器有均等電流輸出。
雖然本發明已以較佳實施例揭露如上，然其並非用以限定本發明，任何熟習此技藝者，在不脫離本發明之精神和範圍內，當可作些許之更動與潤飾，因此本發明之保護範圍當是後附之申請專利範圍所界定者為準。
10‧‧‧電源輸入端
11‧‧‧電源輸出端
12‧‧‧輸出電容
13‧‧‧第一諧振轉換器
130‧‧‧第一變壓器
14‧‧‧第二諧振轉換器
140‧‧‧第二變壓器
15‧‧‧第三變壓器

Claims (3)

  1. 一種具均流功能的並聯式LLC諧振轉換器電路，其包括：一電源輸入端；一輸出電容；一第一諧振轉換器，其分別耦接於該電源輸入端及該輸出電容，而該第一諧振轉換器中包含有一第一變壓器；一第二諧振轉換器，其分別耦接於該電源輸入端及該輸出電容，與該第一諧振轉換器呈現並聯狀態，而該第二諧振轉換器中包含有一第二變壓器；一第三變壓器，該第三變壓器的一繞線組以串聯方式耦接於該電源輸入端與該第一變壓器之間，該第三變壓器的另一繞線組以串聯方式耦接於該電源輸入端與該第二變壓器之間。
  2. 如申請專利範圍第1項所述之具均流功能的並聯式LLC諧振轉換器電路，其中該第三變壓器的圈比數為1：1的平衡變壓器。
  3. 如申請專利範圍第1項所述之具均流功能的並聯式LLC諧振轉換器電路，其中該電路具有多個諧振轉換器，而該第三變壓器則具有圈比數相同的多個繞線組，該繞線組的數量為配合該諧振轉換器的數量。
TW103121525A 2014-06-20 2014-06-20 Parallel Resistive Resonant Converter Circuit with Current Sharing Function TWI532305B (zh)

Priority Applications (2)

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TW103121525A TWI532305B (zh) 2014-06-20 2014-06-20 Parallel Resistive Resonant Converter Circuit with Current Sharing Function
US14/533,103 US9236808B1 (en) 2014-06-20 2014-11-05 Parallel resonant converter circuit with current-equalization function

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TW103121525A TWI532305B (zh) 2014-06-20 2014-06-20 Parallel Resistive Resonant Converter Circuit with Current Sharing Function

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WO2017049191A1 (en) * 2015-09-18 2017-03-23 Murata Manufacturing Co., Ltd. Modular parallel technique for resonant converter
JP6821493B2 (ja) * 2017-04-14 2021-01-27 東芝デベロップメントエンジニアリング株式会社 電流共振型ｄｃ−ｄｃコンバータ
CN108900091B (zh) * 2018-07-06 2019-08-20 华南理工大学 一种基于llc谐振变换器的拓扑结构
US11018589B1 (en) * 2020-02-05 2021-05-25 Smpc Technologies Ltd Systems, methods, and apparatus for balanced current sharing in paralleled resonant converters
US11146175B2 (en) 2020-02-25 2021-10-12 Ferric Inc. One-sided parallel LLC power converter
CN114825962B (zh) * 2022-04-28 2023-03-14 广东首航智慧新能源科技有限公司 多路谐振电路与谐振变换器

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JP3644615B2 (ja) * 1997-02-17 2005-05-11 Ｔｄｋ株式会社 スイッチング電源
EP2299580A3 (en) * 2009-06-24 2011-07-27 STMicroelectronics S.r.l. Multi-phase resonant converter and method of controlling it
US8842450B2 (en) * 2011-04-12 2014-09-23 Flextronics, Ap, Llc Power converter using multiple phase-shifting quasi-resonant converters
US8896182B2 (en) * 2012-04-05 2014-11-25 General Electric Corporation System for driving a piezoelectric load and method of making same

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TW201601437A (zh) 2016-01-01
US9236808B1 (en) 2016-01-12
US20150372607A1 (en) 2015-12-24

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