| 摘要 |
PROBLEM TO BE SOLVED: To allow heat to be conducted efficiently by using a stator that intimately fixes a core into a hollow portion provided in each of armature coils and an elongated support member to the coil, respectively, the core having substantially the same thickness as each coil made of a nonmagnetic material having a predetermined heat conductivity and electrical resistivity, and the support member serving to support the coil and a refrigerant passage. SOLUTION: For thrust and positioning accuracy, the heat conductivity of a core material is preferably 10 W/m deg.K or higher at 25 deg.C, and for overcurrent suppression, its electrical resistivity is preferably 10<6>Ω.cm or higher at 25 deg.C. Field magnets 6 each made of a ferromagnetic substance are arranged so that their opposite poles confront each other, and a yoke 7 is formed of a pair of vertical yoke 7a and horizontal yoke 7b. The yoke 7 and the magnets 6 constitute a movable element 8. The adjacent magnets 6 are reversed-polarity to each other, thereby forming a magnetic circuit and a magnetic gap. A core 2 and elongated support members 3 are adhesively fixed to a hollow portion of each of armature coils 1 and to the coils, respectively. The element 8 movably supported by a guide mechanism is arranged close to the coil 1 so that the coil 1 is located in the magnetic gap.
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