| Summary: | 碩士 === 國立臺北科技大學 === 電腦與通訊研究所 === 98 === This thesis focuses on the design and implementation of the power management based on the bicycle hub-dynamo, which supplies the power energy. Power input stage incorporated a Li-ion battery as buffer supply system operating system, loads include: lights, USB (Universal Serial Bus) charger, MMC (Multi Media Card) storage device, graphic LCD (Liquid Crystal Display) module and ECG(electrocardiogram) heart rate monitor. In the wide load range (at 10mA ~ 600mA), it switched to different power management mechanisms according to different load conditions.
On the other hand, the power consumption model of synchronous buck and boost converter. , and the maximum efficiency point under each load condition was found. Moreover, power management method was implemented for the maximum conversion efficiency in order to ensure the system the maximum power under limited power supply.
TI (Texas Instrument) low power microprocessor was adopted to implement control rules. Input AC peak voltage 4~22 volts, two DC output voltage sets: Vo1=5V and Vo2=3.3V. There’re 92% and 70% efficiency behaviors within heavy load (Vin=4.5V,Vout=5V,I out=600mA) and light load conditions (Vin=5V, Vout=3.3V, I out=10mA) with Boost Converter. When the bike remained mo-tionless, the full-charged battery could supply system full-load operating 60 minutes. The researchers compared and analyzed the signal interference of system supply power with different speed supplying ECG heart rate monitor and verify the reliabil-ity of power supply system.
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