描述
萬用表檢測電機的方法其實很簡單。也就是霍爾傳感器的供電及信號線與電機的三條相線繞阻是絕緣的,電阻很大,當電機有進水時,它們之間的絕緣電阻就變小了。因此用萬用表的高電阻檔就能很方便的測量出電機是否進水。萬用表檢測電機的方法其實很簡單。也就是霍耳傳感器的供電及信號線與電機的三條相線繞阻是絕緣的,電阻很大,當電機有進水時,它們之間的絕緣電阻就變小了。因此用萬用表的高電阻檔就能很方便的測量出電機是否進水。注意以下幾點:數(shù)值僅供參考企業(yè),會因為進水的程度大小,及進水的時間長短不同而不同。當測不出數(shù)值時,即超量程顯示時,則表示電機沒有進水。另外應(yīng)當注意的是,當電機引線。用萬用表測電機不太可靠,還是用搖表。用萬用表測量電機的三個繞組的阻值是否一致。音響中電源濾波器主要是濾除電源中的雜波,使電源輸出平滑。這對于小功率電器如CD機,DVD機,前級等的音質(zhì)有所提高,主要表現(xiàn)在背景靜噪方面,如果用在汽車音響方面其效果就比較突出。如果是家用高級HIFI音響,那就千萬不要使用電源濾波器,因為它制約了電流的輸出,效果反而不好,另外,電源濾波器如果用在視頻上,如電視,電腦,投影機等,其圖像聲音效果一流。
電源濾波器的作用就是減少電源干擾,而電源干擾可以分為兩類:普通模式和共通模式。普通模式是兩組輸入電源線之間的雜訊,這種雜訊通常是在關(guān)機和開機時產(chǎn)生。而共通模式是指因為器材接地不良,又或是廣播無線電及冰箱馬達電磁、日光節(jié)能燈鎮(zhèn)流器、洗衣機、風扇可控硅調(diào)速等引發(fā)的干擾!
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