| US 7,595,575 B2 | ||
| Motor/generator to reduce cogging torque | ||
| Yutaro Kaneko, Yokohama (Japan); and Hiroyuki Nakayama, Yokosuka (Japan) | ||
| Assigned to Nissan Motor Co., Ltd., Yokohama (Japan) | ||
| Filed on Jul. 20, 2006, as Appl. No. 11/490,291. | ||
| Claims priority of application No. 2005-211282 (JP), filed on Jul. 21, 2005. | ||
| Prior Publication US 2007/0018520 A1, Jan. 25, 2007 | ||
| Int. Cl. H02K 7/20 (2006.01) | ||
| U.S. Cl. 310—112 [310/114; 310/268] | 18 Claims |
| 1. A motor/generator comprising:
one or more rotors having a permanent magnet; and
one or more stators forming a plurality of stator teeth parts,
the stator teeth parts of the one or more stators including:
a plurality of first protruding end parts that faces a first surface of the one or more rotors via a first air gap; and
a plurality of second protruding end parts that faces a second surface of the one or more rotors via a second air gap with
a total number of the second protruding end parts being equal to a total number of the first protruding end parts, and each
of the second protruding end parts having a shape in a circumferential direction of the one or more rotors that is different
from a shape of a corresponding one of the first protruding end parts in the circumferential direction of the one or more
rotors; and
a coil mounted on each of the stator teeth parts that creates a magnetic circuit via a magnetic field generated by the permanent
magnet and the coil, the one or more stators creating the magnetic circuit passing through the first air gap and the second
air gap so that the magnetic field passes through at least one of the first protruding end parts and at least one of the second
protruding end parts.
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