| Summary: | 碩士 === 高苑科技大學 === 電子工程研究所 === 100 === Recent mobile solar energy products provide only single power rating output. According to the patent and related literature surveys, the multi-mode energy conversion and dynamical power rating adjustment are needed for better utilization of solar cell energy. The novel solar energy converter was designed to dynamically adjust the output power rating and provide two different voltage output without using the microprocessor in this study. The energy converter consisted of the buck, boost, two-stage power rating regulating and load current detecting circuits by adopting the TI TPS54229, TPS61500 and INA202 IC Chips respectively. The design and manufacturing flow of the energy converter PCB included creating schematic diagram, routing, PCB development & etching, component mounting and soldering, and the PCB size is 62 mm 75 mm.
The converter testing was carried out for the stability, startup response time and conversion efficiency by the simulated dynamic voltage curve by power supply and under the various sunny conditions to test the change of the solar energy intensity during the daytime by using high power WLED as the load. The experimental results showed the converter provides the two stable voltage output at the simulated and realistic solar energy input voltage ranged from 7 to 18V and dynamically change the other output power rating once the main loading current is increased. Under the normal sunny days, the average conversion efficiency of this novel converter was higher than 92%, the startup time was less than 25 ms and standard deviation was 0.97% that is less than the maximum error. The multi-mode solar energy converter could utilize the maximum solar energy source, and possess the merits of stability and fast startup without the microprocessor and be miniaturized for the application in the portable devices.
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