TWI599264B - 非點光源之無頻閃調光電路 - Google Patents

非點光源之無頻閃調光電路 Download PDF

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TWI599264B
TWI599264B TW105140045A TW105140045A TWI599264B TW I599264 B TWI599264 B TW I599264B TW 105140045 A TW105140045 A TW 105140045A TW 105140045 A TW105140045 A TW 105140045A TW I599264 B TWI599264 B TW I599264B
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coil
voltage
conversion
correction
primary side
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TW105140045A
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TW201822588A (zh
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吳志賢
莊凱程
洪正翰
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東貝光電科技股份有限公司
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Priority to TW105140045A priority Critical patent/TWI599264B/zh
Priority to CN201611123286.8A priority patent/CN108156691B/zh
Priority to DE102016125902.0A priority patent/DE102016125902B3/de
Priority to US15/427,274 priority patent/US9854630B1/en
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Publication of TW201822588A publication Critical patent/TW201822588A/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
    • H02M3/33507—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
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/081—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters wherein the phase of the control voltage is adjustable with reference to the AC source
    • 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
    • H02M3/33523—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 with galvanic isolation between input and output of both the power stage and the feedback loop
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/25—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M5/257—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/38—Switched mode power supply [SMPS] using boost topology
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/385—Switched mode power supply [SMPS] using flyback topology
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/59—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits for reducing or suppressing flicker or glow effects
    • 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
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/007—Plural converter units in cascade

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Description

非點光源之無頻閃調光電路
本發明係屬於電源轉換設備之技術領域，特別是關於一種支援TRIAC(TRI-electrode AC switch，雙向三極閘流體)之非點光源之無頻閃調光電路。
為打造舒適明亮且不失時尚品味的閱讀空間或工作空間，不少人係於室內天花板上裝設造型簡單大方的平板燈，且為驅動此燈具中燈源元件運作，當然少不了供轉換市電能源之驅動電路，以肩負提供燈源元件所需之工作電能與平穩整體燈具工作品質之責。而以圖1所示之驅動電路1為例，其係為傳統15.7瓦(W)平板燈普遍採用的非隔離型增壓式(Boost)電源轉換器，設有一電感器(L)、一二極體(D)、一電容器(C)、一開關10、一偵測電阻(RS)及一PWM控制器11，該電感器串接該二極體之陽極並耦接該開關10之汲極，該PWM控制器11耦接該開關10之閘極與源極及該偵測電阻，且該二極體之陰極耦接該電容器後電性連接至少一LED 12。該電感器承接一輸入電壓(Vin)而於該開關10導通時儲存能量，且於該開關10截止時利用該電容器濾波前述該電感器儲存之能量形成一驅動電壓(Vout)或一驅動電流(Iout)後輸出，以透過簡單且低成本之該驅動電路1實現增壓效果而成功於低電壓供電的電路架構下驅動該LED 12發光。然而，該驅動電路1係為非隔離型電路而有如圖2所示恆流效果精度極差的現象，造成安規疑慮與EMC(Electromagnetic Compatibility，電磁相容性)問題，實不符合現行平板燈的調光需求。再者，就平板燈或崁燈等具較廣光源面積而非點光源之燈具而言，若該驅動電路1之輸出非恆定 電流時，具通常知識者皆知，燈具將出現明顯頻閃現象而影響照明品質。
另一方面，常用於傳統白熾燈或鹵素燈的自激式電源轉換電路為隔離式電路架構而無上述問題，其係藉半橋諧振電路實現能源的直接轉換效果而具有啟動快、不頻閃及通用於大小功率電源電路中等特性，且架構簡單而亦具低成本之優勢。然而，自激式驅動電路的架構雖簡單卻缺乏定功率控制機制，造成輸出功率將隨輸入電壓的升高而升高，進而導致燈具無法維持穩定的照明亮度並具有快速老化的問題。
有感於此，如何結合上述隔離式電路架構與現行LED平板燈普遍採用的非隔離式電路架構之優點，以確保具較廣光源面積之燈具於具有TRIAC調光功能的使用情況下，不會有任何頻閃現象發生而符合市場安規的同時更提升市場適應性，使有效益助產業輸出經濟，即為本發明所亟欲探究之課題。
有鑑於習知技藝之問題，本發明之目的在於提供一種非點光源之無頻閃調光電路，係供商用平板燈或崁燈等具較廣光源面積之燈具使用，以允許消費者得以依現行需求調整照明亮度，且確保不會有頻閃問題發生而實現高照明品質之效益。
根據本發明之目的，該非點光源之無頻閃調光電路設有一輸入模組、一轉換模組及一輸出模組，該輸入模組電性連接一外部電源並輸出一輸入電壓，該轉換模組電性連接該輸入模組與該輸出模組而接收一輸入電流後輸出一工作電壓予該輸出模組，以使該輸出模組輸出一驅動電壓而驅動至少一具較廣光源面積之燈具作動，其特徵在於：該非點光源之無頻閃調光電路係設有一TRIAC模組而供調節該輸入電壓之導通相位角，且該轉換模組採用升壓式電路架構並設有一轉換線圈及一轉換器，以利用該轉換線圈及該轉換器調升該輸入電壓之壓值至該工作電壓之壓值，該輸出模組採用返馳式電路架構並設有一控制線圈組及一校正器，使利用該控制線圈組感應該工作電壓形成該驅動電壓的同時透過該校正器校正該驅動電 壓之工作週期而達恆定之壓值。
其中，該工作電壓係為220伏特之壓值。
並且，該轉換器係設有一感測線圈、一第一鐵芯、一轉換晶片與一轉換開關，該轉換線圈置於該第一鐵芯之一次側，該感測線圈置於該第一鐵芯之二次側並電性連接該轉換晶片，且該轉換開關電性連接該轉換晶片與該轉換線圈，於該轉換線圈傳遞該輸入電壓的同時，該感測線圈透過該第一鐵芯感測形成一感測電壓，以供該轉換晶片參考後調節該轉換開關之工作週期而維持該輸入電壓之壓值調升至定值。該控制線圈組係至少由一一次側線圈、一第二鐵芯、一二次側線圈及一校正線圈所構成，該一次側線圈與該校正線圈置於該第二鐵芯之一次側，該二次側線圈置於該第二鐵芯之二次側，該校正器電性連接該一次側線圈與該校正線圈，且該一次側線圈電性連接該轉換模組而承接該工作電壓，使該二次側線圈透過該第二鐵芯磁感形成該驅動電壓，同時，該校正線圈透過該第二鐵芯磁感形成一校正電壓而供該校正器調節該一次側線圈之工作週期。該校正器係設有一校正晶片、一校正開關與一檢測元件，該檢測元件電性連接該校正線圈與該校正晶片，且該校正開關電性連接該校正晶片與該一次側線圈，於該校正線圈磁感該工作電壓而得一校正電壓時，該檢測元件檢測形成該校正訊號並回饋予該校正晶片，使該校正晶片調節該校正開關之工作週期而校正該一次側線圈接收該工作電壓的週期時間，以實現定電壓之功效。
綜上所述，本發明係透過逆向思維的方式將已知之雙級隔離式電源轉換電路應用至具較廣光源面積之LED燈具中，以利用初級側的升壓式(Boost)電路先將該輸入電壓之壓值提升至固定之設定值後，透過二級側的PSR(Primary Side Regulation，一次側校正)返馳式(Fly-back)電路恆定輸出該驅動電壓，使有效降低漣波振幅而實現無頻閃的照明效果，符合產業經濟國際化發展之期望。
習知技藝
1‧‧‧驅動電路
10‧‧‧開關
11‧‧‧PWM控制器
12‧‧‧LED
本發明
2‧‧‧非點光源之無頻閃調光電路
20‧‧‧TRIAC模組
21‧‧‧輸入模組
210‧‧‧EMC器
211‧‧‧橋式整流器
22‧‧‧轉換模組
220‧‧‧轉換線圈
221‧‧‧轉換器
2210‧‧‧感測線圈
2211‧‧‧轉換晶片
2212‧‧‧轉換開關
23‧‧‧輸出模組
230‧‧‧控制線圈組
231‧‧‧校正器
2310‧‧‧校正晶片
2311‧‧‧校正開關
2312‧‧‧檢測元件
第1圖 係為習知非隔離型驅動電路之電路示意圖。
第2圖 係為習知非隔離型驅動電路之波形圖。
第3圖 係為本發明較佳實施例之方塊圖。
第4A、4B圖 係為本發明較佳實施例之電路圖。
第5圖 係為本發明較佳實施例之波形圖。
為使 貴審查委員能清楚了解本發明之內容，謹以下列說明搭配圖式，敬請參閱。
請參閱第3~5圖，其係分別為本發明較佳實施例之方塊圖、電路圖與波形圖。如圖所示，15.7W之該非點光源之無頻閃調光電路2採用雙級隔離式電路架構而供驅動具較廣光源面積之燈具作動，以允許該燈具於亮度調整的使用情況下時，仍實現無頻閃的照明效果而符合商行賣場的高品質消費需求。該非點光源之無頻閃調光電路2設有一TRIAC模組20、一輸入模組21、一轉換模組22及一輸出模組23，該輸入模組21透過該TRIAC模組20電性連接一外部電源(圖未示)而承接一交流電壓，且該轉換模組22電性連接該輸入模組21與該輸出模組23，又該輸出模組23電性連接該燈具中複數個LED(圖未示)。該輸入模組21可設有一EMC器210及一橋式整流器211，該轉換模組22係採用升壓式電路架構並至少設有一轉換線圈220及一轉換器221，且該轉換器221設有一感測線圈2210、一第一鐵芯(T1)、一轉換晶片2211與一轉換開關2212，又該輸出模組23採用PSR返馳式電路架構並設有一控制線圈組230及一校正器231，該控制線圈組230至少由一一次側線圈(NP)、一第二鐵芯(T2)、一二次側線圈(NS)及一校正線圈(NA)所構成，該校正器231則有一校正晶片2310、一校正開關2311與一檢測元件2312。
該TRIAC模組20之一端電性連接該外部電源，而其另一端透過該EMC器210電性連該橋式整流器211，且該橋式整流器211電性連接該轉換線圈220，使該TRIAC模組20承接並調節該外部電源之交流電壓 之導通相位角後，供該橋式整流器211整流形成一輸入電壓而輸出予該轉換線圈220。
該第一鐵芯之一次側與二次側係分別置有該轉換線圈220與該感測線圈2210，該感測線圈2210電性連接該轉換晶片2211，且該轉換開關2212電性連接該轉換晶片2211與該轉換線圈220。該轉換線圈220於接收該輸入電壓時即進行充放電動作而使該輸入電壓之壓值提升至一工作電壓(Vwork)之壓值，同時，該感測線圈2210透過該第一鐵芯感測形成一感測電壓，以供該轉換晶片2211參考後調節該轉換開關2212之工作週期而使該輸入電壓之壓值維持調升至該工作電壓之定值，例如220伏特(V)。
該一次側線圈與該校正線圈置於該第二鐵芯之一次側，該二次側線圈置於該第二鐵芯之二次側，該一次側線圈電性連接該轉換線圈220，該二次側線圈電性連接該等LED，且該校正晶片2310電性連接該一次側線圈、該校正線圈、並透過該檢測元件2312電性連接該校正開關2311，且該校正開關2311電性連接該一次側線圈。於該一次側線圈接收該工作電壓後，該二次側線圈透過該第二鐵芯磁感形成一驅動電壓(Vout)而驅動該等LED發光。同時，該校正線圈透過該第二鐵芯磁感形成一校正電壓，該檢測元件2312接收該校正電壓並檢測形成一校正訊號後回饋予該校正晶片2310，使該校正晶片2310調節該校正開關2311之工作週期而校正該一次側線圈接收該工作電壓的週期時間，進而影響該二次側線圈磁感形成該驅動電壓的大小，以達實現穩定該等LED所承接之電壓(VLED)或電流(ILED)之功效而使漣波振幅比降至1.1倍。
以上所述僅為舉例性之較佳實施例，而非為限制性者。任何未脫離本發明之精神與範疇，而對其進行之等效修改或變更，均應包含於後附之申請專利範圍中。
2‧‧‧非點光源之無頻閃調光電路
20‧‧‧TRIAC模組
21‧‧‧輸入模組
22‧‧‧轉換模組
220‧‧‧轉換線圈
221‧‧‧轉換器
23‧‧‧輸出模組
230‧‧‧控制線圈組
231‧‧‧校正器

Claims (5)

  1. 一種非點光源之無頻閃調光電路，係設有一輸入模組、一轉換模組及一輸出模組，該輸入模組電性連接一外部電源並輸出一輸入電壓，該轉換模組電性連接該輸入模組與該輸出模組而接收一輸入電流後輸出一工作電壓予該輸出模組，以使該輸出模組輸出一驅動電壓而驅動至少一具較廣光源面積之燈具作動，其特徵在於：該非點光源之無頻閃調光電路係設有一雙向三極閘流體模組而供調節該輸入電壓之導通相位角，且該轉換模組採用升壓式電路架構並設有一轉換線圈及一轉換器，以利用該轉換線圈及該轉換器調升該輸入電壓之壓值至該工作電壓之壓值，該輸出模組採用返馳式電路架構並設有一控制線圈組及一校正器，使利用該控制線圈組感應該工作電壓形成該驅動電壓的同時透過該校正器校正該驅動電壓之工作週期而達恆定之壓值。
  2. 如申請專利範圍第1項所述之非點光源之無頻閃調光電路，其中該工作電壓係為220伏特之壓值。
  3. 如申請專利範圍第2項所述之非點光源之無頻閃調光電路，其中該轉換器係設有一感測線圈、一第一鐵芯、一轉換晶片與一轉換開關，該轉換線圈置於該第一鐵芯之一次側，該感測線圈置於該第一鐵芯之二次側並電性連接該轉換晶片，且該轉換開關電性連接該轉換晶片與該轉換線圈，於該轉換線圈傳遞該輸入電壓的同時，該感測線圈透過該第一鐵芯感測形成一感測電壓，以供該轉換晶片參考後調節該轉換開關之工作週期而維持該輸入電壓之壓值調升至定值。
  4. 如申請專利範圍第3項所述之非點光源之無頻閃調光電路，其中該控制線圈組係至少由一一次側線圈、一第二鐵芯、一二次側線圈及一校正線圈所構成，該一次側線圈與該校正線圈置於該第二鐵芯之一次側，該二次側線圈置於該第二鐵芯之二次側，該校正器電性連接該一次側線圈與該校正線圈，且該一次側線圈電性連接該轉換模組而承接該工 作電壓，使該二次側線圈透過該第二鐵芯磁感形成該驅動電壓，同時，該校正線圈透過該第二鐵芯磁感形成一校正電壓而供該校正器調節該一次側線圈之工作週期。
  5. 如申請專利範圍第4項所述之非點光源之無頻閃調光電路，其中該校正器係設有一校正晶片、一校正開關與一檢測元件，該檢測元件電性連接該校正線圈與該校正晶片，且該校正開關電性連接該校正晶片與該一次側線圈，於該校正線圈磁感該工作電壓而得該校正電壓時，該檢測元件檢測形成一校正訊號並回饋予該校正晶片，使該校正晶片調節該校正開關之工作週期而校正該一次側線圈接收該工作電壓的週期時間，以實現定電壓之功效。
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