6ES7902-3AG00-0AA0
在凸極電機(jī)中,磁極可以由繞在磁極面下的繞組產(chǎn)生,在非凸極結(jié)構(gòu)中,繞組可以分散在極面槽內(nèi)。一般的罩極電機(jī),包括繞著支撐磁場(chǎng)相位的極部放置的繞組。有些類(lèi)型的電機(jī)包括導(dǎo)體,導(dǎo)體有較厚的金屬薄片組成,金屬條一般是銅的或鋁的材質(zhì)制作。根據(jù)電機(jī)所使用的起動(dòng)方法的類(lèi)型,電機(jī)的三相繞組以星形或三角形連接。像鼠籠這樣的電機(jī)可以通過(guò)星形連接到三角形的定子上,頻繁地在軌道上運(yùn)行。
兩相電機(jī)和三相電機(jī)的繞組都安裝在定子槽中,線圈纏繞在外部固定裝置上,然后纏繞到槽中,夾在線圈外圍和槽之間的絕緣層可防止磨損。繞組由繞在鐵芯上的銅線制成的,用來(lái)制造或獲得電磁能。最常用的繞組材料是搪瓷油漆包裹的銅或鋁線,包括槽中的一組線圈以及在繞組邊緣區(qū)域的齒槽。
在大型電機(jī)中,磁極繞組被分成幾束相同的線圈,這些線圈被插入比較小的槽中,該組稱(chēng)為相位帶(見(jiàn)下圖)。相位帶的分布線圈抵消了一些奇次諧波,在磁極上產(chǎn)生了正弦的磁場(chǎng)分布。由于相位帶可以重疊,磁極邊緣的槽的匝數(shù)可能比其他槽的少,邊緣槽可能包含兩相繞組。
旋轉(zhuǎn)磁場(chǎng)是由兩個(gè)相互成直角的線圈產(chǎn)生的,由90°異相電流驅(qū)動(dòng),三個(gè)繞組相隔120°放置在空間中,并由相應(yīng)的120°相電流供電,也會(huì)產(chǎn)生旋轉(zhuǎn)磁場(chǎng), 當(dāng)90°相位正弦波從(a)點(diǎn)到(d)點(diǎn)移動(dòng)時(shí),磁場(chǎng)逆時(shí)針旋轉(zhuǎn)(圖a-d),
定子旋轉(zhuǎn)磁場(chǎng)的旋轉(zhuǎn)速度與每相極對(duì)數(shù)有關(guān),下面的“全速”圖共有6極或3極對(duì)和3相,每相只有一對(duì)極,磁場(chǎng)將每一個(gè)正弦波周期旋轉(zhuǎn)一次。
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Kuka 96 Roboter IR365/10 Langarm
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6ES7902-3AG00-0AA0