描述
直流電動機的構(gòu)造較復(fù)雜,價格也比交流電動機昂貴,維護維修也較困難。近年來,由于變頻調(diào)速技術(shù)的發(fā)展,在中小功率的電動機調(diào)速領(lǐng)域中,交流電動機正逐步取代直流電動機。盡管如此,由于直流電動機具有轉(zhuǎn)速穩(wěn)定、便于大范圍平滑調(diào)速、起動轉(zhuǎn)矩較大等優(yōu)點,因此,廣泛用于要求進行平滑、穩(wěn)定、大范圍的調(diào)速或需靈活控制起動、制動的生產(chǎn)機械。特別是對調(diào)速要求較高的工作裝置(特別是大功率的工作裝置)仍然采用直流電動機來驅(qū)動。事實上、直流電動機調(diào)速技術(shù)也隨著電力電子技術(shù)的發(fā)展而不斷地發(fā)展和完善著。這里主要介紹直流電動機的基本工作原理、基本構(gòu)造、運行特性和調(diào)速方法。
我們這里有您急需的停產(chǎn)備件,
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絕 對優(yōu)勢,絕 對低價!絕 對正品,優(yōu)質(zhì)的產(chǎn)品,一流的服務(wù),充足的庫存,
歡迎來電詢價,我們將會給您最優(yōu)惠的價格!
主營:世界知名品牌的PLC、DCS系統(tǒng)備件模塊
①Allen-Bradley(美國AB)系列產(chǎn)品》
②Schneider(施耐德電氣)系列產(chǎn)品》
③General electric(通用電氣)系列產(chǎn)品》
④Westinghouse(美國西屋)系列產(chǎn)品》
⑤SIEMENS(西門子系列產(chǎn)品)》
⑥銷售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse(西屋):OVATION系統(tǒng)、WDPF系統(tǒng)、MAX1000系統(tǒng)備件。
⑧Invensys Foxboro(??怂共_):I/A Series系統(tǒng),F(xiàn)BM(現(xiàn)場輸入/輸出模塊)
順序控制、梯形邏輯控制、事故追憶處理、數(shù)模轉(zhuǎn)換、輸入/輸出信號處理、數(shù)
據(jù)通信及處理等。Invensys Triconex:冗余容錯控制系統(tǒng)、基于三重模件冗余(TMR)
結(jié)構(gòu)的zui現(xiàn)代化的容錯控制器。
⑨Siemens(西門子):Siemens MOORE,Siemens Simatic C1,Siemens數(shù)控系統(tǒng)等。
⑩Bosch Rexroth(博世力士樂):Indramat,I/O模塊,PLC控制器,驅(qū)動模塊等。
◆Motorola(摩托羅拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
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