USING A computational model OF A current collector for calculatiNG the "current collector slide - contact wire" contact performance
The paper suggests to use the classical model of Holm's circular contact area corrected for the temperature of contacting materials for determining the transient electrical resistance in the "current collector slide - contact wire" sliding contact. In this case, the contact is considered as a linear contact. The values calculated in the computational model of a current collector with consideration of the features of its kinematic diagram, reaction forces, gimbal friction, joints inertia, as well as the impact of the countercurrent air flow in case of different motion speeds and lift heights, were used as a contact force. The voltage drop in the contact was calculated by Ohm's law, and the temperature of contact inserts was derived from the integral formulation of the Newton-Richmann law. The described model allows for achievement of the adequate accuracy of the slide contact inserts heating temperature calculation and preliminary evaluation of the compliance with the GOST requirements at the current collector design stage.