應用於壓電能量擷取系統之使用壓電振盪器主動調節式同步切換能量擷取整流IC

近年來，電子設備及無線感測相關應用裝置廣為普遍，使得攜帶型能源備受關注，為了尋找能取代傳統使用電池供給能源的方式，透過環境振動源提取能的方法備受關注，其中以微型壓電能量擷取器提環境振動源更為熱門。電能量擷取系統便是在此需求下誕生，其由壓電元件、交流轉換直介面路直流轉換介面電路，與負載裝置組合而成。於交流轉換直介面電路中，傳統單純以全橋整器實現的方式會造成巨大的能量損耗，因此許多文獻加入非線性同步切換技術以改善傳統的標準整流器之缺點，又其中以再加入電感協助流與壓相位對齊的方式被廣為使用，然而電感往佔據較大路體積，並且因為其散發之磁波會使受到干擾而影響表現。為此，本論文提出一應用於壓電能量擷取系統之介面電路 ─使用壓電振盪器主動調節式同步切換能量擷取整流IC（Synchronized Switch Harvesting integrated circuit using piezoelectric Oscillators with Active regulation, SSHOA），在無使用電感情況下並透過非線性之同步切換技術，且引入主動式二極體實現電壓翻轉，以達到電流與壓相位對齊的目標。本論文以台積電 0.18 μm高壓CMOS製程實現能應用於壓電量擷取系統之介面電路晶片，並於壓電能量擷取器輸出流峰對值為50 μA、寄生電容值為16 nF、共振頻率為100 Hz的情況下於佈局後模擬達到反轉因子為58%，最大功率輸出增益與標準能量擷取介面電路相比下則到達 560%。

關鍵字

壓電能量擷取系統；交流對直流轉換器；同步切換介面電路；無感式整流器；主動式二極體

並列摘要

With lots of electric devices and wireless sensing equipment show up recently, to save energy in a way to be utilized in everywhere seems a big issue. When finding a way to replace battery, using vibration energy from surrounding seems a good idea. As for it, using a micro-piezoelectric transducer to extract vibration energy is now a popular topic and a system called piezoelectric energy harvesting system is now in great which consists of a piezoelectric transducer, an AC-to-DC converter, a DC-to-DC converter and a load device. As to AC-to-DC converter, a kind of circuit only includes rectifier called full-bridge rectifier causes strong energy loss so adding synchronized switching technique in circuit in order to reduce power loss shows in many papers. And as these researches, adding inductor in circuit to make phase of current and voltage aligned seems most popular. However, inductor always occupies much space and electromagnetic waves cause by it affect circuit during operating. As a result, this thesis proposes an architecture called "Synchronized Switch Harvesting integrated circuit using piezoelectric Oscillators with Active regulation (SSHOA) " to improve weak points when using inductor. SSHOA rectifier uses synchronized switching technique and also uses active diode to help voltage flipping to make current and voltage aligned. In this thesis, the chip fabricated in TSMC 0.18 μm HV-COMS process which can be applied on piezoelectric energy harvesting interface circuit. And according to post-layout simulation results, this circuit can boost flipping factor up to 58% and the output power up to 560% which compared with full-bridge rectifier when the peak-to-peak current source is 50 μA, the parasitic capacitance is 16 nF and the resonance frequency is 100 Hz from transducer.

並列關鍵字

Piezoelectric Energy Harvesting System ； AD/DC Converter ； Synchronized Switching Interface Circuit ； Inductor-less Rectifier ； Active Diode

參考文獻

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