Patent ID: 7750529

Claim:
An electric pump mounted in a vehicle, comprising: an electric motor and a pump structural body, said electric motor including: a stator comprising a stator core and a stator coil, and a rotor constituted so that different magnetic poles are formed in the circumferential direction alternatively, and supported rotatably; wherein said stator core having a plurality of first claw magnetic poles and a plurality of second claw magnetic poles, each of said plurality of first and second claw magnetic poles extending from an axial end of said core toward the other end of said core, and each of said plurality of first and second claw magnetic poles being formed alternatively in the circumferential direction; said stator coil wound inside said core in a ring form, said stator coil generating different magnetic poles on said first and second claw magnetic poles upon being energized; said plurality of first and second claw magnetic poles comprise a claw part which counters a rotor perimeter side and a claw base arranged at both sides of the rotor in the direction along in a rotation axis direction of said stator coil, respectively; said plurality of first and second claw magnetic poles have a thickness in a direction of a path of the tip part of said claw part is less than a thickness in the direction of a rotation axis of said claw base; and said pump structural body adapted to discharge a flowing medium as a rotational force is given to said pump structural body by said rotor.