VEHICLE BODY HEIGHT ADJUSTMENT VALVE HAVING RESOLVER FOR RAILWAY CARRIAGE

摘要

Provided is a vehicle body height adjustment valve that includes an actuating shaft rotating in response to a variation in the height of an air spring, and performs a pressurized air supplying or discharging operation on the air spring in response to the rotation of the actuating shaft, so as to adjust the height of the vehicle body at a constant height, the vehicle body height adjustment valve including a resolver that detects the height of the air spring so that the vehicle body is tilted when the railway vehicle travels along a curve; wherein the resolver includes a rotor that is fixed to the actuating shaft and a stator that surrounds the rotor, in which an inner circumferential surface of the stator is provided with a plurality of iron cores having excitation coils and detection coils that are wound therearound and arranged in a circumferential direction so as to face an outer circumferential surface of the rotor, and in which an outer peripheral profile of the rotor is configured such that a gap between the outer circumferential surface of the rotor and each iron core of the stator changes periodically in a circumferential direction during a 360-degree rotation of the rotor. The vehicle body height adjustment valve having a resolver for a railway vehicle with such a configuration can realize reductions of cost and size.