Asami, S., Watanabe, T., Tominaga, S., and Murakami, A., "New Slip Ring System for Electromagnetic Coupling in HEV Driveline," SAE Technical Paper 2016-01-1222, 2016, doi:10.4271/2016-01-1222.
This paper describes the slip ring system for a new hybrid system using an electromagnetic torque converter or an electromagnetic coupling. The slip ring system, which enables electric power transmission between a winding rotor and an inverter fixed on a case, is a key component for establishing a new highly efficient hybrid system. Reducing the wear of the brushes in the slip ring system is a major topic of this research. To achieve this objective, brush wear characteristics were investigated using test-piece experiments that simulated the hybrid system environment. By clarifying these characteristics, the structure of a slip ring system for reducing brush wear was identified and a wear prediction method was constructed.