Presentation 2019-06-14
Fluctuation Components of Contact Voltage at AgPd Brush and Au-plated Slip-ring System withLlubricant II
Koichiro Sawa, Yoshitada Watanabe, Takahiro Ueno, Hiroyasu Masubuchi,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) The authors have been investigating the deterioration process of Au-plated slip-ring and Ag-Pd brush system with lubricant to realize stable and long lifetime. In this paper, the contact voltage waveforms were regularly recorded during the test, and analyzed to obtain the time change of peak voltage and standard deviation during one rotation. Based on these results, it is discussed what happens at the interface between ring and brush with the lubricant. And the following results are made clear. The fluctuation of voltage waveforms, especially peaks of pulse-like fluctuation more easily occurs for minus rings than for plus rings. Further, peak values of the pulse-like fluctuation rapidly decreases and disappear at lower rotation speed as mentioned in the previous works. In addition, each peals of the pulse-like fluctuation is identified at each position of the ring periphery. From these results, it can be assumed that lubricant film exists between brush and ring surface and electric conduction is realized by tunnel effect. In other words, it can be made clear that the fluctuation would be caused by the lubricant layer, not only by the ring surface. Finally, an electric conduction model is proposed and the above results can be explained by this model.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) slip ring / Au plating / lubricant / contact voltage / fluctuation / tunnel effect
Paper # EMD2019-9
Date of Issue 2019-06-07 (EMD)

Conference Information
Committee EMD
Conference Date 2019/6/14(1days)
Place (in Japanese) (See Japanese page)
Place (in English) Kikai-Shinko-Kaikan Bldg.
Topics (in Japanese) (See Japanese page)
Topics (in English)
Chair Shinichi Wada(TMC System)
Vice Chair Yoshiki Kayano(Univ. of Electro-Comm.)
Secretary Yoshiki Kayano(Fuji Electric)
Assistant Yuichi Hayashi(NAIST)

Paper Information
Registration To Technical Committee on Electromechanical Devices
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Fluctuation Components of Contact Voltage at AgPd Brush and Au-plated Slip-ring System withLlubricant II
Sub Title (in English)
Keyword(1) slip ring
Keyword(2) Au plating
Keyword(3) lubricant
Keyword(4) contact voltage
Keyword(5) fluctuation
Keyword(6) tunnel effect
1st Author's Name Koichiro Sawa
1st Author's Affiliation Nippon Institute of Technology(NIT)
2nd Author's Name Yoshitada Watanabe
2nd Author's Affiliation Nippon Institute of Technology(NIT)
3rd Author's Name Takahiro Ueno
3rd Author's Affiliation Nippon Institute of Technology(NIT)
4th Author's Name Hiroyasu Masubuchi
4th Author's Affiliation NIDEC SERVO(NIDEC SERVO)
Date 2019-06-14
Paper # EMD2019-9
Volume (vol) vol.119
Number (no) EMD-84
Page pp.pp.13-18(EMD),
#Pages 6
Date of Issue 2019-06-07 (EMD)