6NH7803-3BA00-0AA0
電機的星形接法和三角形接法是兩種不同的電機繞組連接方式。
星形接法也稱為Y型接法,是指將電機繞組的每個相的一端連接在一起,形成一個節點,而另一端則分別連接到電機的三個相線上。在星形接法下,電機的線電壓和相電壓之間的關係為線電壓=√3×相電壓,相電流和線電流之間的關係為相電流=線電流/√3。
三角形接法也稱為△型接法,是指將電機繞組的每個相的一端連接到電機的相線上,而另一端則分別連接到相鄰相的另一端。在三角形接法下,電機的線電壓和相電壓之間的關係為線電壓=相電壓,相電流和線電流之間的關係為相電流=線電流×√3。
在實際應用中,電機的星形接法和三角形接法都有其優缺點。星形接法適用於額定電壓較高的電機,因為其相電壓較低,可以減小繞組的電壓應力和絕緣材料的需求,同時也有利於降低諧波噪聲。而三角形接法適用於額定電流較高的電機,因為其相電流較低,可以減小繞組的電流應力和損耗,同時也有利於提高電機的起動扭矩。
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