Eddy current clutch

Japanese: 渦電流クラッチ - うずでんりゅうくらっち
Eddy current clutch

...There are two types of clutches: one in which the friction surfaces are always pressed together by spring force and connected, and when necessary, they are disconnected from the outside by levers, hydraulics, electromagnetic forces, etc. (used in automobiles), and the other in which the friction surfaces are always separated and only connected when necessary by pressing together with levers, hydraulics, etc. Other special clutches include the electromagnetic powder clutch, which uses magnetic powder between a pair of opposing disks with a small gap between them to transmit rotation by magnetic force, and the eddy current clutch, which uses eddy currents between a pair of disks to transmit rotation, and there are also types of clutches in which the driving shaft and driven shaft do not come into solid contact. Torque converters and fluid couplings that use fluids can also be considered a type of clutch. [Kitago Kaoru]. ...

*Some of the terminology that refers to "eddy current clutches" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…着脱の操作には,摩擦面がばね力により常時押しつけられていて連結状態にあり,必要に応じて外部からレバー,油圧,電磁力などにより切断する方式(自動車用)と,逆に摩擦面が常時離れていて,必要なときにのみ,てこ,油圧などによって押しつけられて連結する方式とがある。 このほか特殊なものとして,わずかなすきまで対向させた1対の円板などの間に磁性体粉を入れておき,磁力を作用させて回転を伝える電磁粉体クラッチ,同じく1対の円板などの間に渦電流を作用させて回転を伝える渦電流クラッチのように原動軸と従動軸が固体接触しない方式のものもあり,流体を利用したトルクコンバーターや流体継手も一種のクラッチといえる。【北郷 薫】。…

※「渦電流クラッチ」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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