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壓電換能器設(shè)計(jì)與能量獲取特性研究-資料下載頁(yè)

2025-05-12 15:10本頁(yè)面

【導(dǎo)讀】振動(dòng)能轉(zhuǎn)換成電能,以達(dá)到能源回收再利用的目的。的能量獲取特性研究。首先依據(jù)低頻環(huán)境振動(dòng)的特點(diǎn),建立了以末端固定質(zhì)量塊。頻率的變化規(guī)律。鋼為壓電懸臂梁型的結(jié)構(gòu)。通常微加工技術(shù),在絕緣體上不銹鋼存底上制備較厚。的壓電薄膜,不銹鋼層作為主要彈性層。給實(shí)現(xiàn)共振,從而滿足最大電能輸出[15]。工作時(shí),質(zhì)量塊和壓電懸臂梁一起振。動(dòng),上下兩個(gè)表面所受到應(yīng)力相異,即上表面受到壓應(yīng)力,則下表面受到拉應(yīng)力,反之亦然,因此上下電極所產(chǎn)生的電荷極性也相反。輸入到儲(chǔ)能元件中,或直接作為微功耗負(fù)載的供電電源[16,17]。壓電效應(yīng),在壓電層上將產(chǎn)生相應(yīng)的變形從而帶動(dòng)微懸臂梁振動(dòng)。生的壓電電荷;QP為由于激勵(lì)電壓的作用,在壓電層的等效電容上聚集的電荷。EP為壓電層材料的彈性模量:d31為壓電層的壓電常數(shù)。等效為圖中的電流源。把這些能量傳給儲(chǔ)能裝置,或者電源調(diào)整器。在鎮(zhèn)流電路部分,四個(gè)整流二極管接成電橋的形式,兩兩輪流導(dǎo)通。

  

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