應用互補電感電流控制推挽式轉換電路之單級高功因LED驅動器

A Single-Stage High-Power-Factor LED Driver Using Push-Pull Converter with Complementary Inductor Currents

王派挺(Pai-Ting Wang)

指導教授 ： 張永農

共同指導教授 ： 詹舜宇(Shun-Yu Chan)

國立虎尾科技大學/電機資訊學院/電機工程系碩士班/碩士(2016年)

摘要

本文提出一應用互補電感電流控制推挽式轉換電路之單級高功因LED驅動器，並巧妙的應用隔離變壓器激磁電感之儲放能，使單級推挽式LED電路具有零電壓切換。本電路具以下特點:(1)利用單級架構，可減少功率元件的用量，使電路更精簡；(2)具零電壓切換之功能，可提升電路之效能；(3)利用交錯式功因修正電感之儲放能，使電路具備高功因與驅動較大瓦數照明負載之能力；(4)本電路無浮接開關，因此控制訊號可以不需隔離，使電路設計更簡易；(5)脈波寬度調變技術，使LEDs燈具大範圍調光之能力。
本文實現一210W之應用互補電感電流控制推挽式轉換電路之單級高功因LED驅動器的雛形，並將功因修正電感電流，分別操作於不連續導通模式與連續導通模式，以驗證本電路於兩種模式下都可穩定工作，且達到零電壓切換之功能。本電路輸入電壓為市電110V，效率可達94%以上、功率因數可達0.99以上，且具2%~100%的調光範圍。

關鍵字

LED驅動器 ； 高功因 ； 推挽式轉換器 ； 零電壓切換

並列摘要

In this thesis, a circuit topology of a single-stage high-power-factor LED driver using push-pull converter with complementary inductor currents is presented. By using the magnetizing inductance of isolation transformer, the proposed LED driver possesses zero-voltage switching feature. The developed LED driver circuit has the following advantages: (1)using single-stage structure to reduce the components count and make the circuit simple; (2)possessing ZVS function to enhance the circuit performance; (3)applying dual inductor technique to manage the PFC inductor energy, thus promoting the power factor and driving the high power lighting load; (4)being free from floating switch to make the design simple without needing isolated control signal; (5)employing the PWM technology to widen the dimmable range of LEDs lighting.
Finally, a prototype 210W single-stage high-power-factor LED driver using push-pull converter with complementary inductor currents is realized and measured in cases of operating the PFC inductor in DCM and CCM respectively. The experimental measurements reveal that the circuit can operate steadity and possess ZVS in both modes. With the source voltage being 110V, the performace disclose that the operating efficiency is higher than 94% ,the power factor exceeds 0.99 and the dimmable range from 2% to 100%.

並列關鍵字

LED driver ； high power factor ； push-pull converter ； zero-voltage switching

參考文獻

[33] 楊鎮豪，2009，“定電流輸出之交錯式功率因數修正器研製”， 國立臺北科技大學電機工程系碩士論文。

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