Gearless Track-Friendly Metro with Guided Independently Rotating Wheels

Abstract Track–vehicle severe interaction on track with small curve radius results in rail wear and corrugation, wheel polygonization, which drain considerable resources for grinding wheels re-profiling metro lines. To reduce the damage caused by track-vehicle interaction, paper analyzes reasons leading to then proposes an architecture of a vehicle independently rotating driven directly permanent magnet synchronous motors. The is axle guidance, offered passive linkages, ensures that all axles are oriented radially, while control strategy was kept as simple possible, identifying only two basic traction conditions. concept first discussed validated through comprehensive set running dynamics simulation performed multibody software evaluate rolling contact fatigue traction/braking, coasting different cant deficiency/excess shows proposed virtually capable avoiding both damages, achieves highest possible friendliness. track-fiendly could be good reference reducing rail-track damages maintainace cost.