Title:
ROTOR AND MOTOR
Document Type and Number:
WIPO Patent Application WO/2014/188628
Kind Code:
A1
Abstract:
A rotor used for an inner rotor motor includes a plurality of magnets arranged circumferentially around the center shaft, and a rotor core made of a magnetic body. The rotor core has an inner core and a plurality of outer cores. The plurality of outer cores and a plurality of magnets are alternately and circumferentially arranged radially outside the inner core. The magnet has a pair of circumferential end surfaces as pole surfaces, and at least one of the end surfaces is a projecting surface. A portion of the magnet has a circumferential width that is wider than the circumferential width of an outer end surface. Thereby, the volume of the magnet is increased without increasing the diameter of the rotor, and thus the magnetic force of the rotor can be increased. As a result, when incorporating the rotor into a motor, the torque of the motor can be improved.
Inventors:
ICHIEN AKIRA (JP)
Application Number:
PCT/JP2013/084576
Publication Date:
November 27, 2014
Filing Date:
December 25, 2013
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
H02K1/27
Foreign References:
| JP2013021776A | 2013-01-31 | |||
| EP2538528A2 | 2012-12-26 | |||
| JP2009268204A | 2009-11-12 | |||
| JP2013034344A | 2013-02-14 | |||
| JP2010063285A | 2010-03-18 | |||
| US6459185B1 | 2002-10-01 | |||
| JPS55100050A | 1980-07-30 | |||
| JP2011524735A | 2011-09-01 |
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