- 學位論文
高功率白光LED驅動電路設計與應用
Design and Application of High Power White Light LED Driver
摘要
本論文首先將針對LED檯燈進行設計，以減小LED檯燈消耗功率與製作成本為目標 ,為了取代應用於檯燈上之光柵,本論文採用側射式白光LED搭配三角結構進行檯燈之背板設計,設計過程將搭配TracePro等光學軟體進行分析,輔以田口法等最佳化法則以得到符合規範之LED檯燈設計。 本論文另外將針對應用於檯燈之LED驅動電路進行設計,驅動電路之架構以返馳式轉換器為主,並利用PWM電路來控制轉換器開關,使得在LED數量有變動下也有穩定的功率輸出,以完成應用於各種不同LED陣列組之變電壓定電流驅動器之設計。 論文的實驗部分將整合設計之檯燈與驅動電路,在檯燈之照度與均勻度符合檯燈之規範下,進行驅動電路功率的量測,藉著與目前市售之檯燈功率進行比較,以驗證本論文所設計之檯燈搭配驅動電路可在符合規範的情況下有效減低功率消耗。
並列摘要
First, a novel design of the LED lamp is proposed in this paper in order to reduce the power efficiency of the LED lamp and the process cost. To replace the grating on the LED lamps, a side-emitting white LED lens with triangular structure of the backplane design is proposed. Design of the LED lamps should satisfy the JIS regulation, so that the optical analysis program with the Taguchi method is utilized in the procedure of the LED lamp design. After the design of the backplane of the LED lamp, the driver circuit of the LED is redesigned with the flyback convert. The main circuit of the switch mode is a single-stage PFC circuit. Unlike convention converters use output voltage as a control parameter, the switch mode constant current control is using the output current as a feedback to get constant current output. With the PWM controlled converter switch, we can obtain the constant current output in the variety numbers of the LEDs. The experiment of the LED lamp and the driver is going to measure the power efficiency of the driver and to compare with on-sale lamps. The iluminance and Uniformity of the proposed LED lamp is satisfy the JIS regulation, and experiment results show the proposed driver could improve the power efficiency of the LED lamp.