外文翻譯---電動(dòng)機(jī)的結(jié)構(gòu)特點(diǎn)-其他專業(yè)-全文預(yù)覽
【正文】 winding as well as the armature winding. If current is assumed to flow into brush B1 in , then mote that on the left side of the rotor for the outside conductors current flows into the paper while the opposite occurs for the conductors located on the outside surface of the right side of the rotor. A force is produced on each conductor, thereby producing a torque causing clockwise rotation. Now the function of the mutator is to assure that as a conductor such as 1 in revolves and thus goes from the left side of brush B1 to the right side, the current flowing though it reverses, thus yielding a continuous unidirectional torque for the entire armature winding. Recall that a reversed conductor current in a flux field of reversed polarity keeps the torque unidirectional. The reversal of current es about because the mutator always allows current to be conducted in the same directions in either side of the armature winding whether or not it is rotating. Another point of interest in concerns the location of the brushes. By placing the brushes on a line perpendicular to the field axis all conductors contribute in producing a unidirectional torque. If, on the other hand, the brushes were placed on the same line as the field axis, then half of the conductors would produce clockwise torque and the other half of the counterclockwise torque, yield a zero torque. 摘自《電氣自動(dòng)化專業(yè)英語》哈工大出版社 李久勝、馬洪飛 等編 2021 年 6 月第二版 譯文： 英文翻譯 第 6 頁 共 8 頁 電動(dòng)機(jī)的結(jié)構(gòu)特點(diǎn) 機(jī)電設(shè)備的能量轉(zhuǎn)換過程通常包括兩個(gè)重要的結(jié)構(gòu)特點(diǎn)，他們是產(chǎn)生磁通密度的勵(lì)磁繞組和工作被感應(yīng)的電樞繞組。ba39。英文翻譯 第 1 頁 共 8 頁 Construction Features of Electrical Machines The energyconversion process usually involves the presence of two important features in a given electromechanical device. These are the field winding, which produces the flux density, and the armature winding, in which the “working emf is induced. In this section the salient construction features of the principal types of electric machines are described to show the location of these windings, as well as to demonstrate the general position of such machines. Induction Motor This is one of the most rugged and most widely used machines in industry. Its stator is posed of laminations of highgrade sheet steel. The inner surface is slotted to acmodate a threephase winding. In (a) the threephase winding is represented by three coils, the axes of which are 120 electrical degrees apart. Coil aa39。 represents phase c coils. When one end of each phase is tied together, as depicted in (b), the threephase stator winding is said to be Yconnected.
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