| US 7,560,839 B2 | ||
| Electric motor and fuel pump having the same | ||
| Shinji Sumiya, Hekinan (Japan); Kiyoshi Nagata, Nagoya (Japan); Hiromi Sakai, Nukata-gun (Japan); and Takeo Fukuda, Sakuragawa (Japan) | ||
| Assigned to Denso Corporation, Kariya (Japan) | ||
| Filed on Nov. 06, 2006, as Appl. No. 11/593,160. | ||
| Claims priority of application No. 2005-320932 (JP), filed on Nov. 04, 2005. | ||
| Prior Publication US 2007/0103014 A1, May 10, 2007 | ||
| Int. Cl. H02K 11/00 (2006.01) | ||
| U.S. Cl. 310—71 [310/43] | 11 Claims |
| 1. An electric motor comprising:
a stator;
a rotor that is rotatably arranged at radially inward of the stator;
a plurality of coil cores that are circumferentially arranged one after another in one of the stator and the rotor;
a permanent magnet that is provided in the other one of the stator and the rotor and includes magnetic poles of opposite polarities,
which are alternately arranged in a circumferential direction of the electric motor along an opposed surface of the permanent
magnet that is radially opposed to the plurality of coil cores;
a plurality of coils, each of which is wound around a corresponding one of the plurality of coil cores, wherein the plurality
of coils switches magnetic poles, which are formed in opposed surfaces of the plurality of coil cores radially opposed to
the permanent magnet, when energization of the plurality of coils is controlled;
a plurality of connection lines, each of which electrically interconnects corresponding at least two of the plurality of coils;
and
a plurality of positioning members that position the plurality of connection lines and limit interference between the connection
lines and interference between the connection lines and the coils, wherein:
each of the plurality of connection lines and the corresponding at least two of the plurality of coils are made from a single
winding, which forms the corresponding at least two of the plurality of coils, and
the plurality of coils and the plurality of connection lines are covered with dielectric resin.
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