Abstract: A replenishment passage connects a compressor to a tank, and a first check valve is provided in the middle of the replenishment passage. A supply/discharge passage connects the tank to air suspensions. A supply/discharge switching valve is provided in the middle of the supply/discharge passage, and suspension control valves are provided at a location between the supply/discharge switching valve and the air suspensions. A discharge passage connects the supply/discharge switching valve to a suction port of the compressor, and a discharge passage open/close valve is provided in the middle of the discharge passage. When a vehicle height is lowered, air within the air suspensions is guided to the suction port of the compressor through the discharge passage, compressed by the compressor, and supplied into the tank.

Abstract: A replenishment passage connects a compressor to a tank, and a first check valve is provided in the middle of the replenishment passage. A supply/discharge passage connects the tank to air suspensions. A supply/discharge switching valve is provided in the middle of the supply/discharge passage, and suspension control valves are provided at a location between the supply/discharge switching valve and the air suspensions. A discharge passage connects the supply/discharge switching valve to a suction port of the compressor, and a discharge passage open/close valve is provided in the middle of the discharge passage. When a vehicle height is lowered, air within the air suspensions is guided to the suction port of the compressor through the discharge passage, compressed by the compressor, and supplied into the tank.

Abstract: A damper apparatus (12) as the force generation mechanism mounted between a vehicle body (2) and a bogie (5) includes an attenuation damper (13), an electric damper (14), and a gear apparatus (15). The attenuation damper includes a rod protruding from a cylinder, and generates a damping force by converting motion energy of a forward or backward movement of the rod into heat energy. The electric damper includes a stator, and a movable element linearly movable relative to the stator. The gear apparatus is disposed between the attenuation damper and the electric damper, and can mechanically switch the attenuation damper and the electric damper between a series connection and a parallel connection. The gear apparatus switches a connection state between the attenuation damper and the electric damper according to the condition.

Abstract: An electromagnetic suspension apparatus includes a stator disposed on a vehicle body side and including a core and coils, a movable element disposed on a wheel side and including an outer rube and permanent magnets, and a cylinder apparatus located inside the stator and the movable element and disposed between the vehicle body side and the wheel side. A rod of the cylinder apparatus and the outer tube are nonrigidly coupled to each other via a coupling member formed as an elastically deformable elastic body. When a lateral force is applied, the coupling member is elastically deformed, by which the outer tube moves or swings relative to the rod so that the coils and the permanent magnets can be prevented from contacting each other.

Abstract: An electromagnetic suspension system uses a linear motor having coils disposed around the outer periphery of a stator and permanent magnets disposed along the inner periphery of a mover. Wiring is routed through a gap between a first rod and a second rod. Thus, contact between the wiring and the second rod is avoided, and the wiring is protected. Consequently, it is possible to ensure reliability for the electric system of the electromagnetic suspension system.

Abstract: The controller inputs a required thrust force value calculated by a required thrust force calculation unit, to a low frequency filter and a high frequency filter. Output values of the low frequency filter and the high frequency filter are amplitude-limited by a low frequency limiter and a high frequency limiter, respectively. Output values of the low frequency limiter and the high frequency limiter are added, and the added value is output into an inverter as a thrust force instruction value. In this case, a limit value of the low frequency limiter is set to be smaller than a limit value of the high frequency limiter.

Abstract: An electromagnetic suspension system uses a linear motor having coils disposed around the outer periphery of a stator and permanent magnets disposed along the inner periphery of a mover. Wiring is routed through a gap between a first rod and a second rod. Thus, contact between the wiring and the second rod is avoided, and the wiring is protected. Consequently, it is possible to ensure reliability for the electric system of the electromagnetic suspension system.

Abstract: The present invention provides an electromagnetic suspension system including a casing attachable to a first attachment target member, a movable element, and an armature. One of the movable element and the armature is fixedly disposed in the casing, and the other of the movable element and the armature is movably disposed in the casing. A rod extending in a direction of the relative movement is disposed at the other of the movable element and the armature movably disposed in the casing. The rod extends through a rod guide disposed at the casing to protrude to an outside of the casing, and is configured to be attachable to a second attachment target member. The electromagnetic suspension system further comprises a rotational mechanism allowing a relative rotation between the first attachment target member and the second attachment target member.

Abstract: Disclosed are a high-damping and high-thrust cylindrical linear motor and a motor-driven power steering device. A stator includes three-phase stator and a stator core. A slider includes a slider core and permanent magnets. The stator core includes stator-core salient poles, two auxiliary poles and yoke units with a small poles on its surface of the side of the slider, the auxiliary poles being deployed at both ends of the stator-core salient poles, the yoke units configuring a magnetic circuit in cooperation with the stator core and the auxiliary poles. The magnetic circuit is shared among the three phases. Polarities of magnets of the slider become an identical polarity, each of the plurality of permanent magnets being positioned at a position which is opposed to each of the plurality of small poles included in one stator-core salient pole out of the plurality of stator-core salient poles.