Characteristics of a sliding system with Au-plated slip-ring and AgPd brush for power supply(Session 7 : Contact Phenomena)

概要

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Sliding contact is still an important mechanism to transmit current from a stationary equipment to a moving device. A power supply slip-ring used in a mounter is presently 20 millions rotations in life, but expected to have more life time. In this paper slip ring with Au plated on Ni base layer is investigated in reliability against AgPd brush. Test conditions are 400rpm in rotation speed and 5A in operation current. Contact resistance and surface morphology are observed with operation time. Consequently, in some case the Au-plated layer is worn out about 15 millions rotations, but contact resistance stays low and stable during the test of 20 millions rotations. Compared with no load current rings the contact resistance of rings with load current is usually lower. Further, the relation between contact resistance and sliding surface change is discussed.
社団法人電子情報通信学会の論文
2004-10-15