Importance

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Abstract

A driving device includes a rotor unit including a rotation shaft, a fluid supplying portion, and a motor rotor, a housing that rotatably supports the rotation shaft, a stator case accommodating a motor stator and a motor rotor. The motor rotor includes a consequent pole rotor including a motor rotor core and a plurality of the magnets arranged along a circumferential direction of the motor rotor core. The magnets form a plurality of magnetic pole portions that serve as primary magnetic poles. The motor rotor core includes portions located between adjacent ones of the magnetic pole portions in the circumferential direction. The portions form magnetic-pole-forming portions that serve as secondary magnetic poles. The motor unit includes a magnetization inhibiting portion formed to inhibit magnetization of the fluid supplying portion. The support portion of the housing comprises a nonmagnetic metal.

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First Claim