TW201628327A - 磁化平衡方法 - Google Patents

磁化平衡方法 Download PDF

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Publication number
TW201628327A
TW201628327A TW104124260A TW104124260A TW201628327A TW 201628327 A TW201628327 A TW 201628327A TW 104124260 A TW104124260 A TW 104124260A TW 104124260 A TW104124260 A TW 104124260A TW 201628327 A TW201628327 A TW 201628327A
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Taiwan
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mosfet
gate
time
commutation
power supply
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TW104124260A
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English (en)
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維恩 高科
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吉時利儀器公司
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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
    • H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
    • 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
    • H02M1/40—Means for preventing magnetic saturation
    • 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
    • H02M3/337—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 in push-pull configuration
    • H02M3/3372—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 in push-pull configuration of the parallel type

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Power Conversion In General (AREA)
  • Dc-Dc Converters (AREA)
  • Electronic Switches (AREA)

Abstract

一種用於具有至少兩MOSFET(金屬氧化物半導體場效電晶體)之切換電源供應器的磁化平衡方法可包括測量第一及第二換向時間、調整第一MOSFET閘極之導通時間(脈衝寬度)相對於第二MOSFET閘極之導通時間(脈衝寬度)的時序、及判斷換向時間是否相等。

Description

磁化平衡方法
本發明大致關於切換電源供應器且，較特別的是關於與此電源供應器有關的磁化平衡技術。
圖1揭示一典型推挽式切換電源供應器100之範例。在範例中，切換電源供應器100包括兩金屬氧化物半導體場效電晶體(MOSFET)(在此即MOSFET 1及MOSFET 2)及一在負載(Load)處之輸出電壓(Vout)。MOSFET 1之閘極(Gate 1)係由方形波驅動且MOSFET 2之閘極(Gate 2)係由驅動Gate 1之方形波之反相驅動。
圖2係對應於圖1所示電源供應器100之MOSFET 1及MOSFET 2之閘極電壓(分別為VG1、VG2)及汲極電壓(分別為VD1、VD2)以及磁化電流(例如，施加通過變壓器之電壓之時間積分)的圖示200。
如圖1中所示電源供應器100之電源供應器設計上的一普遍問題是發生在MOSFET 1供電期間施加之伏秒與MOSFET 2供電期間施加之伏秒之間出現一小差異 時。磁化電流通常發展成DC(直流)分量，其建立直到電阻損迫使伏秒平衡為止，此時DC分量即停止增加。若電阻損小，變壓器將飽和，造成磁化電流大到足以破壞MOSFET之任一者或兩者。
據此，吾人仍需要特別關於電源供應器之磁化平衡。
所揭露技術之實施例大致關於切換電源供應器用之磁化平衡技術。
100‧‧‧切換電源供應器
200‧‧‧圖示
300‧‧‧推挽式切換電源供應器
400‧‧‧第一圖示
500‧‧‧第二圖示
600‧‧‧用於切換電源供應器的磁化平衡方法
圖1揭示一典型推挽式切換電源供應器之範例。
圖2係對應於圖1所示電源供應器之MOSFET閘極電壓及汲極電壓以及磁化電流的圖示。
圖3揭示根據本技術之某些實施例的一推挽式切換電源供應器的範例。
圖4係對應於根據本技術之某些實施例的一電源供應器之MOSFET閘極電壓及汲極電壓以及磁化電流的第一圖示。
圖5係對應於根據本技術之某些實施例的一電源供應器之MOSFET閘極電壓及汲極電壓以及磁化電流的第二圖示。
圖6揭示根據本技術之某些實施例的一用於切換電源供應器的磁化平衡方法的範例。
所揭露技術之實施方式大抵是指一用於切換電源供應器之平衡技術。
圖3揭示根據本技術之某些實施例的一推挽式切換電源供應器300的範例。在範例中，MOSFET 1之閘極(Gate 1)係由小於50%之脈衝驅動且MOSFET 2之閘極(Gate 2)係由相移180度之第二、相等的脈衝驅動。在MOSFET 1及MOSFET 2兩者皆關斷期間，磁化電流導致變壓器上之電壓換向(亦即，反向電壓)。
在變壓器上跨接電容(在此即電容器C)使換向轉換速度受到減緩/控制。若伏秒不平衡，則磁化電流通常採用DC(直流)分量。此DC分量通常導致一相位較快換向且另一相位較慢換向。此將伏秒失配移向平衡且停止DC分量繼續增加。若閘極驅動有緩慢的升降時間，啟始之伏秒失配會因為MOSFET臨限電壓變化而顯著。結果通常是換向時間之間有一大差距。
圖4係對應於根據本技術之某些實施例的一電源供應器之MOSFET閘極電壓及汲極電壓以及磁化電流的第一圖示400，例如圖3所示之推挽式切換電源供應器300。閘極驅動在每次導通時間之間有一關斷時間，以容許磁化電流有時間將汲極換向。在範例中，換向時間 (t1及t2)係平衡(即t1=t2)。
圖5係對應於根據本技術之某些實施例的一電源供應器之MOSFET閘極電壓及汲極電壓以及磁化電流的第二圖示500，例如圖3所示之推挽式切換電源供應器300。如同圖4所示之範例400，閘極驅動在每次導通時間之間有一關斷時間，以容許磁化電流有時間將汲極換向。惟，在範例中，換向時間(t1及t2)並不平衡(例如，t1<t2)。
圖6係根據本技術之某些實施例的一用於切換電源供應器的磁化平衡方法600的範例，例如圖3所示之推挽式切換電源供應器300。
在602，測量對應於一具有兩MOSFET之電源供應器的兩相位的換向時間。在此範例中，第一MOSFET之閘極稱為Gate 1且第二MOSFET之閘極稱為Gate 2。
在604，調整(例如，增加)Gate 1之導通時間(脈衝寬度)相對於Gate 2之導通時間(脈衝寬度)的時序(例如，相位)，以便於平衡兩相位之伏秒。
在606，判斷換向時間是否匹配(例如，其是否彼此實質相等)。若換向時間匹配，該方法即在608結束；若換向時間未匹配(例如，其中一者大於另一者)，該方法則回到604。
以下說明在於提供一適當機器之簡要說明，機器可供所揭露技術之實施例實施於其中。如文內所述， 「機器」一詞應廣泛包含單一機器或一併操作之通訊耦合機器或裝置的系統。示範性機器可包括計算裝置，例如個人電腦、工作站、伺服器、攜帶式電腦、手持式裝置、平板裝置、及類似者。
典型上，一機器包括一系統匯流排，可供處理器、記憶體(例如，隨機存取記憶體(RAM)、唯讀記憶體(ROM)、及其他狀態保留媒體)、儲存裝置、音頻介面、及輸入/輸出介面埠附接。機器也可包括嵌入式控制器，例如可編程或非可編程邏輯裝置或陣列、專用積體電路(ASICs)、嵌入式電腦、智慧卡、及類似者。機器至少部分由一般輸入裝置之輸入控制，例如鍵盤及滑鼠，以及從另一機器接收到之指示、與一虛擬實境(VR)互動、生物特徵量測回饋、或其他相關輸入。
機器可使用一或多個連接方式於一或多個遠端機器，例如透過網路介面、數據機、或其他通訊耦合。機器可以藉由實體及/或邏輯網路互連，例如內部網路、網際網路、區域網路、廣域網路、等等。習於此技者應該瞭解的是，網路通訊可使用許多有線及/或無線之短距或長距載波或協定，包括射頻(RF)、衛星、微波、電機電子工程師學會(IEEE)545.11、藍牙、光學性、紅外線、電纜、雷射、等等。
本發明之原理已參考揭示實施例揭述及揭示於上，應該瞭解的是在不悖離此原理下，揭示實施例可做配置及細部結構上之調整，且可依任意所需之方式組合。 儘管前文是針對特定實施例，但是其他架構也可以想見。
特別是，即使本文內使用像是「根據本發明之一實施例」或類似者等詞，諸詞意味著一般參考實施例的可能性，而非侷限本發明於特定實施例架構。如本文內所述，諸詞可以視為可組合成其他實施例之相同或不同實施例。
因此，鑒於本文內所述實施例之廣泛置換方式，此詳細說明及配合材料僅供說明，不應視為限制本發明之範疇。因此，本發明主張諸此修改皆應在文後申請專利範圍及其等效技術之範疇及精神內。
600‧‧‧用於切換電源供應器的磁化平衡方法

Claims (3)

  1. 一種用於切換一類型之電源供應器之磁化平衡方法，其中磁化驅動切換之換向，該切換電源供應器具有第一MOSFET(金屬氧化物半導體場效電晶體)及第二MOSFET，該第一MOSFET具有閘極且該第二MOSFET具有閘極，該方法包含：測量第一換向時間；測量第二換向時間；調整該第一MOSFET之該閘極之導通時間(脈衝寬度)相對於該第二MOSFET之該閘極之導通時間(脈衝寬度)的時序；及判斷該第一換向時間是否至少實質等於該第二換向時間。
  2. 如申請專利範圍第1項之方法，進一步包含回應於該第一換向時間並未至少實質等於該第二換向時間之判斷，再次調整該第一MOSFET之該閘極之導通時間(脈衝寬度)相對於該第二MOSFET之該閘極之導通時間(脈衝寬度)的時序。
  3. 如申請專利範圍第1項之方法，進一步包含回應於該第一換向時間至少實質等於該第二換向時間之判斷，停止該方法。
TW104124260A 2014-10-24 2015-07-27 磁化平衡方法 TW201628327A (zh)

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US10250078B2 (en) 2016-10-18 2019-04-02 Robert A Moffatt Wireless power transfer to multiple receiver devices across a variable-sized area

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TWI620403B (zh) * 2017-03-09 2018-04-01 Improved self-excited push-pull type conversion circuit

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EP3012954A3 (en) 2016-06-29
CN105553285A (zh) 2016-05-04
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US20160118899A1 (en) 2016-04-28
JP2016086637A (ja) 2016-05-19

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