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| Electromagnetic clutch ： ウィキペディア英語版 |
Electromagnetic clutch
Electromagnetic clutches operate electrically, but transmit torque mechanically. This is why they used to be referred to as electro-mechanical clutches. Over the years, EM became known as electromagnetic versus electro mechanical, referring more about their actuation method versus physical operation. Since the clutches started becoming popular over 60 years ago, the variety of applications and clutch designs has increased dramatically, but the basic operation remains the same.
Single-face clutches make up approximately 90% of all electromagnetic clutch sales.
The electromagnetic clutch is most suitable for remote operation since no linkages are required to control its engagement. It has fast, smooth operation. However, because energy dissipates as heat in the electromagnetic actuator every time the clutch is engaged, there is a risk of overheating. Consequently, the maximum operating temperature of the clutch is limited by the temperature rating of the insulation of the electromagnet. This is a major limitation. Another disadvantage is higher initial cost.
==Friction-plate clutch==
A friction-plate clutch uses a single plate friction surface to engage the input and output members of the clutch.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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