Design and Implementation of LED Emergency Lighting System
碩士 === 國立虎尾科技大學 === 航空與電子科技研究所 === 100 === This paper proposes the design and implementation of an LED emergency light system. The proposed system includes the battery charging circuit with a lithium battery and LED lighting driver circuit. Uses the RENESAS R8C/26 microprocessor to control the charg...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
2012
|
| Online Access: | http://ndltd.ncl.edu.tw/handle/459h55 |
| Summary: | 碩士 === 國立虎尾科技大學 === 航空與電子科技研究所 === 100 === This paper proposes the design and implementation of an LED emergency light system. The proposed system includes the battery charging circuit with a lithium battery and LED lighting driver circuit. Uses the RENESAS R8C/26 microprocessor to control the charging and constant current LED driver, and according mains switching charging or LED driver, charging method binding ReflexTM charging and constant current/constant voltages method to improve the charging efficiency and prevent battery life is shortened. Using the constant current drive the LED can stabilize the illumination from the battery voltage change impacts and prevent damage to the LED. When the LED emergency light system operation is not normal or component damage caused by voltage or current abnormal immediate protection circuit until troubleshooting automatic reversion to improve the reliability and practicality. Finally add the EMI filter to reduce high frequency noise, Conform EMI specification and reduce the damage to other equipment.
|
|---|