Brushless Slip Ring for High Power Transmission

Santoro, C.; Hayes, Ron; Herman, Jason

doi:10.2514/6.2009-6673

Cited by 6 publications

(2 citation statements)

References 1 publication

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“…In the engineering application, the rolling current-carrying friction pairs worked at different rotation speeds. The typical low-speed ones are radar, aerospace return ring, collector ring, etc., 15) while the high-speed ones are ordinary train, rolling bearing, etc. 16) The rotational speeds of copper disk A-B were set to be 4 r/min-6 r/min, 240 r/min-360 r/min, 300 r/min-450 r/min, 400 r/min-600 r/min, 600 r/min-900 r/min to simulate actual situation.…”

Section: Experimental Approachmentioning

confidence: 99%

Effect of Rotation Speed on the Tribological and Conductive Behaviors of Rolling Current-Carrying Cu Pairs

Song

Zhang

et al. 2021

Mater. Trans.

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The tribological and conductive performance of the rolling current-carrying pairs were studied at different rotation speeds based on the disc-disc Cu pairs. Whether the current was applied or not, the friction coefficient decreased with the increasing of rotation speed. The average contact resistance increased with the rotation speed and the applied current. The sharp fluctuation of the real-time current was proposed as the failure criterion for the rolling current-carrying pairs, and both the rotation speed and the current accelerated the failure process. Erosion pits and melting could be observed by SEM, and the surface oxidation could be detected by EDS on the failure surface. It was speculated that arc discharge appeared under high speed and large current conditions, which encouraged the transformation of damage mechanism from mechanical wear to arc erosion. These results may provide some useful suggestions on the failure mechanism and life tests of the electro-conductive rotary joints.

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Section: Experimental Approachmentioning

confidence: 99%

Effect of Rotation Speed on the Tribological and Conductive Behaviors of Rolling Current-Carrying Cu Pairs

Song

Zhang

et al. 2021

Mater. Trans.

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“…Transferred data integrity is an important characteristic for the brush-ring system [9]. To explore the critical parameters, several special sliding electrical contact tribotesters were designed, which can be divided into three types.…”

Section: Introductionmentioning

confidence: 99%

The effect of friction and wear behavior on the signal transmission of brush-ring system during electrical contact sliding

Yuan

Song

et al. 2022

Preprint

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Copper-graphite brush and slip-ring systems are often used to transmit electrical energy and signal between moving and stationary parts. At present, the research on the brush-ring system mainly focuses on power transmission, while on signal transmission is relatively lesser. In this study, the effects of friction and wear behavior on signal waveform distortion were in-situ analyzed using a custom-designed tribotester, which can specially synchronize the slip-ring rotation period with the input signal waveform. Results were analyzed comprehensively from tribological and electrical aspects to find out the key factors, including friction coefficient, friction temperature, contact resistance, surface morphology, roughness, wear particles, and compositions. It was found that the distortion of signal waveform is mainly affected by the friction film. During the sliding electrical contact motion, the increase of friction film will increase the contact resistance, which in turn increases the signal waveform distortion. At the same time, under the normal load and shear force, the friction film moves along the sliding direction, hence causing the signal phase angle to shift. From a tribological point of view, the friction coefficient and temperature decrease with increasing the friction film. So, for the brush-ring system, the formation of friction film is good for the friction stability but bad for signal transmission.

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Investigation of the electrical rolling contact degradation based on fractal theory

Niu

Chen

Yang

et al. 2020

Engineering Failure Analysis

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Brushless Slip Ring for High Power Transmission

Abstract: Honeybee Robotics Spacecraft Mechanisms Corporation (Honeybee) has developed a brushless slipring (the Rolling Contact Connector, or RCC), which has demonstrated the ability to outperform traditional rotary signal transfer solutions in power density and operational life.

Cited by 6 publications

References 1 publication

Effect of Rotation Speed on the Tribological and Conductive Behaviors of Rolling Current-Carrying Cu Pairs

Effect of Rotation Speed on the Tribological and Conductive Behaviors of Rolling Current-Carrying Cu Pairs

The effect of friction and wear behavior on the signal transmission of brush-ring system during electrical contact sliding

Investigation of the electrical rolling contact degradation based on fractal theory

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