【正文】 壓相同時，不同容量的鋁電解電容所能達(dá)到的飽和電壓也相同，；但對不同容量的鋁電解電容，其充電速率不同，且電容的充電速率隨著電容容量的增大而減小。鉭電容內(nèi)部沒有電解液，很適合在高溫工作，使用金屬鉭做介質(zhì)，適用于電壓、電流不大的場合。鉭電解電容和鋁電解電容相比具有的優(yōu)點包括：①體積?。虎谑褂脻穸确秶鷮?；③壽命長、絕緣電阻高、漏電流??；④阻抗頻率特性好；⑤可靠性高等優(yōu)點。試驗中。試驗設(shè)備的實物圖如圖所示。由以上的研究可以發(fā)現(xiàn)，雖然壓電振子能產(chǎn)生較大電壓，但其所輸出的電流相對較小，其輸出功率還只能以毫瓦級來計算，相對于目前的一些電子器件的正常工作的功率來說，壓電陶瓷的發(fā)電能力是極其有限的。由該圖可以看出，壓電振子空載時，其電壓輸出波形為正弦波。本節(jié)試驗所使用的壓電振子的尺寸和材料性能參數(shù)如下：壓電陶瓷的材料為PZT4，壓電陶瓷的尺寸參數(shù)為：LWh=58mm30mm。試驗設(shè)備主要包括HEAS5功率放大器，HEV50高能激振器、DS5000系列數(shù)字存儲示波器。由第二章壓電振子的基礎(chǔ)理論知識可知，壓電陶瓷的電特性等效電路可表示為電荷等效電路。而實際應(yīng)用中，往往考慮的是壓電發(fā)電裝置的輸出功率，且其數(shù)值的大小與負(fù)載電阻有關(guān)。 ④ good impedance frequency characteristics。 At the same time, the power amplifier voltage regulator allows different piezoelectric oscillator output amplitude of the AC sine wave。s electric current size respectively is mill amperes and milliamp ere. Works as the piezoelectric vibrator external connection rectification bridge and the filter electric capacity, what its outputs is the direct current, the output voltage and the power also has the very big relations with the load resistance. Likewise, may result in its output voltage and between the output and the load resistance relational curve by the theoretical formula and the experiment test system, the related parameter which the theoretical calculation uses with works as the piezoelectric vibrator is direct and the load is connected when same. May discover by the above research, although the piezoelectric vibrator can produce the great voltage, but its outputs the electric current is relatively small, its output also can only calculate by a kilowatt level, is opposite in the present some electronic device39。 At the same time, the use experiment test system, the selection different resistance number39。s piezoelectric vibrator39。s in above two kind of situations output voltage and the output and between the load resistance size relations through the experimental method, and draws up the corresponding assay curve, and carries on the parative analysis with the theoretical formula puted result. the test equipment mainly includes the HEAS5 power amplifier, the HEV50 high energy driver, the DS5000 series digital storage oscilloscope. In the testing through the regulating power amplifier39。s power rate. May know by the second chapter of piezoelectric vibrator39。s research after the piezoelectricity electric power facility external connection load39。s size and the load resistance concern. Therefore, these rules have conducted system39。s output, but also has conducted the memory characteristic research through each kind of storage medium to the piezoelectricity electric power facility39。s accuracy, presently separately confirms piezoelectric vibrator39。s output. This laboratory use39。s equivalent capacity size using the Avon meter is: C= microfarad. Presses may know by the experimental principle, when the regulating power amplifier, causes the driver by the frequency f= drive piezoelectric vibrator, then the piezoelectric vibrator has an angular frequency ω=2πf=, time its idling voltage output wave shape. May see by this chart, when piezoelectric vibrator idling, its voltage output wave shape is a sine wave, may read out its peak voltage 0v through the oscilloscope is .The electrical vibrator outputs between active voltage and active power and load resistance theory relations curve。 Obtains actually the optimum load and the maximum output performance number respectively are 71 kilo ohms and mill watt, this time, the theory and the laboratory correspondence39。s energy storage characteristic research is very necessary, this festival carries on saves.Test the selected piezoelectric vibrator, and its structural parameters and material properties are related to the power of this chapter to verify test the same as the piezoelectric vibrator. Physical map of the test equipment as shown， Piezoelectric vibrator exciter fixed, the piezoelectric power generation device constitutes a cantilever. Power amplifier by adjusting the frequency of vibration can set the frequency according to the piezoelectric vibrator incentives。 ③ long life, high insulation resistance, leakage current small。 but the capacity of different aluminum electrolytic capacitors, which charge different rates, and the capacitor charging rate with the electric Yung capacit