山東德慶電阻器RN302-280M-10/4D耐高溫散熱性優(yōu)電阻溫度系數(shù)小

電阻器的作用

電阻主要是通過設(shè)定一個特定的直流電壓范圍來控制導(dǎo)通和關(guān)斷流向制動電阻的電流，使直流母線電壓保持在某一安全范圍以內(nèi)，從而達(dá)到保護(hù)變頻調(diào)速裝置和電機(jī)器件的目的。根據(jù)異步電動機(jī)的原理，在一些需要快速降速的應(yīng)用場合，若滑差越大那么轉(zhuǎn)矩也會越大，這樣制動轉(zhuǎn)矩將隨著降速速率的加大而增大，使系統(tǒng)降速的時間也大大縮短，能量的回饋速度也大大加快，直流母線上的電壓會迅速上升，現(xiàn)在我們就需要在在變頻器直流側(cè)加入放電電阻單元組件，將產(chǎn)生的能量快速轉(zhuǎn)換成熱能并消耗掉，使直流母線的電壓處在一個安全的范圍以內(nèi)。

在電力設(shè)施中的應(yīng)用：

    1、陶瓷管型啟動式線繞電阻器將固定圈數(shù)成形于陶瓷管上，，順著陶瓷管上旋狀牙溝纏繞，該啟動電阻器功率大且堅固，耐高溫、散熱性優(yōu)，電阻溫度系數(shù)小、呈直線變化，適合大電流做短時間過負(fù)載時使用，適用于電動機(jī)啟動、負(fù)載測試、產(chǎn)業(yè)機(jī)械、電力分配、儀器設(shè)備及自動控制裝置等

    2

電阻器的選型

   1.在高增益放大電路中.應(yīng)選用噪聲電動勢小的電阻器，如金屬膜也阻器、碳膜電阻器和線繞電阻器。

   2.針對電路的工作頻率選用不同類堪的電阻器。線繞電阻器的分布參數(shù)較大，即使采用無感繞制的線繞電阻器，其分布參數(shù)也比非線繞電阻器大得多，因而線繞電阻不適合在高頻電路中工作。在低于50kHz 的電路中，由于電阻器的分布參數(shù)對電路工作影響不大，可選用線繞電阻器。

3.在高頻電路中的電阻器，要求其分布參數(shù)越小越好。所以，在高達(dá)數(shù)百兆赫的高頻電路中應(yīng)選用碳膜電阻器、金屬膜電阻器和金屬氧化膜電阻器。在超高頻電路中，應(yīng)選用超高頻碳膜電阻器。

電阻器的型號

RQ52-180L-6/3H17KW電阻器RQ52-200L-6/4H26KW電阻器RQ52-225M-6/5H34KW電阻器RQ52-250M1-6/5H42KW電阻器RQ52-250M2-6/6H52KW電阻器RQ52-280S-6/7H63KW電阻器RQ52-280M-6/9H85KW電阻器RQ52-160L-8/2H9KW電阻器RQ52-180L-8/3H13KW電阻器RQ52-200L-8/3H18.5KW電阻器RQ52-225M-8/3H26KW電阻器RQ52-250M1-8/5H35KW電阻器RQ52-250M2-8/5H42KW電阻器RQ52-280S-8/5H52KW電阻器RQ52-280M-8/7H63KW電阻器RQ52-315S-8/9H85KW電阻器RQ52-315M-8/11H100KW電阻器RQ52-280S-10/6H42KW電阻器RQ52-280M-10/6H55KW電阻器 電阻器RQ52-315M-10/10H85KW電阻器RQ52-355M-10/12H110KW電阻器RQ52-355L1-10/13H132KW電阻器RQ52-355L2-10/18H150KW電阻器RQ52-400L1-10/20H190KW電阻器RQ52-400L2-10/24H240KW電阻器RQ54-180L-6/4H15KW電阻器RQ54-200L-6/4H22KW電阻器RQ54-225M-6/5H30KW電阻器RQ54-250M1-6/5H37KW電阻器RQ54-250M2-6/7H45KW電阻器RQ54-280S-6/9H55KW電阻器RQ54-280M-6/10H75KW電阻器RQ54-160L-8/3H7.5KW電阻器RQ54-180L-8/3H11KW電阻器RQ54-200L-8/3H15KW電阻器RQ54-225M-8/5H22KW電阻器RQ54-250M1-8/5H30KW電阻器RQ54-250M2-8/6H37KW電阻器RQ54-280S-8/6H45KW電阻器RQ54-280M-8/7H55KW電阻器RQ54-315S-8/10H75KW電阻器RQ54-315M-8/12H90KW電阻器RQ54-280S-10/6H37KW RQ54-315S-10/8H55KW電阻器RQ54-315M-10/12H75KW電阻器RQ54-355M-10/14H90KW電阻器RQ54-355L1-10/16H110KW電阻器RQ54-355L2-10/19H132KW電阻器RQ54-400L1-10/24H160KW電阻器RQ54-400L2-10/27H200KW電阻器RQ56-160M2-6/3H6.3KW電阻器RQ56-160L-6/3H9KW電阻器RQ56-180L-6/3H13KW電阻器RQ56-200L-6/4H19KW電阻器RQ56-225M-6/5H26KW電阻器RQ56-250M1-6/6H32KW電阻器RQ56-250M2-6/7H39KW電阻器RQ56-280S-6/8H48KW電阻器RQ56-280M-6/12H63KW電阻器RQ56-160L-8/2H6KW電阻器RQ56-180L-8/3H9KW電阻器RQ56-200L-8/3H13KW電阻器RQ56-225M-8/5H18.5KW電阻器RQ56-250M1-8/5H26KW電阻器RQ56-250M2-8/7H32KW電阻器RQ56-280S-8/7H39KW電阻器RQ56-280M-8/9H48KW電阻器RQ56-315S-8/9H63KW電阻器RQ56-315M-8/10H75KW電阻器RQ56-280S-10/5H32KW電阻器RQ56-280M-10/9H37KW電阻器RQ56-315S-10/8H48KW電阻器RQ56-315M-10/10H63KW電阻器RQ56-355M-10/14H75KW電阻器RQ56-355L1-10/18H90KW電阻器RQ56-355L2-10/21H110KW電阻器RQ56-400L1-10/24H135KW電阻器RQ56-400L2-10/25H170KW電阻器