變頻器產業得到飛速發展，變頻器產品的產業化規模日趨壯大。交流變頻器自20世紀60年代問世后，80年代就在工業化廣泛使用，進入90年代，隨著人們節能環保意識的加強，變頻器的應用越來越普及。

廈門岳航計算機工程有限公司

聯系人：李素云

企業QQ：2851195446，2851195466

手機：18965423501

座機：0592-5165501

變頻器節能主要表現在風機、水泵的應用上。為了保證生產的可靠性，各種生產機械在設計配用動力驅動時，都留有一定的富余量。當電機不能在滿負荷下運行時，除達到動力驅動要求外，多余的力矩增加了有功功率的消耗，造成電能的浪費。

同時，風機、泵在使用變頻調速后，可以控制電機的啟動電流，降低電力線路電壓波動，啟動時需要的功率更低，具有可控的加速功能、運行速度和轉矩極限，具備減速停車、自由停車、減速停車+直流制動等受控的停止方式，能大幅降低能耗，節約了齒輪箱等機械傳動部件。

3 變頻器在實驗室應用時帶來的問題

隨著出口產品的增長，各地電壓等級、頻率各異，其它和地區的工頻以60hz居多，電壓又有400v、415v的區別，由于對變頻器技術的相關知識掌握得較少，對變頻器電氣特性的測定方法掌握得不夠全面，開始我們采用變頻器提供所需的60hz電源，在測試過程中發現了諸多問題：

(1)風機轉速和電壓變化。輸出60hz電源時，電機轉速并不是50hz時的1.2倍，將輸入側的電壓調整為380v時，輸出側的電壓和輸入測的電壓不同，差異較大。這是因為變頻器是采用逆變技術的，通用的變頻器都是變頻變壓(vvvf)，頻率發生變化，電壓也會成正比發生變化，如圖1所示。

Mettler-Toledo 17780747C Excellence Plus XP Balance Operating Instructions

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Nikon 5x Objective Lens for Nikon MM-200/400/800 Measuring Microscopes *Damaged*

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Julabo TW12 Digital Water Bath 20-99.9C +/-0.1C 115V 1100W

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Alco EK-759S Liquid Line Filter Drier, 1-1/8" Solder

Gallenkamp INR-401-030Q Orbital Incubator & Cooler with Illumination *For Parts*

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