Patent ID: 7719152
Filing Date: 2010-05-18
Classification: F16C,H02K

Abstract:
1. A magnetic levitation actuator comprising an electromagnet and a ferromagnetic member provided so as to face a pole face of the electromagnet under a non-contact state, wherein many projecting portions are formed on respective confronting faces of the pole face of the electromagnet and the ferromagnetic member; and wherein said electromagnet is a driving member, and the driving member is accommodated in a case, the electromagnet contains an iron core mounted on an outer portion of the case and a magnetic coil wound around the iron core, an end face of the iron core constitutes a pole face, the end face of the iron core concerned is formed of a non-laminated ferromagnetic member and the non-laminated ferromagnetic member is exposed to an inner surface of the case so as to serve as a part of an inner wall of the case.