Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2005-09-06
2005-09-06
Arbes, Carl J. (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S602100, C029S609000, C148S111000, C148S306000, C148S307000, C148S310000, C310S216006, C420S087000, C420S119000
Reexamination Certificate
active
06938324
ABSTRACT:
A motor stator core for achieving improved magnetizing feature in lower magnetic fields and reduced iron loss, and improving motor power. The stator core fabriated out of non-oriented electrical steel sheets is annealed by applying a magnetic field to the heated stator core at least in the temperature range from a temperature immediately above a Curie point thereof to 300° C. in the process of cooling the stator core. The magnetic field has the same direction as the direction of exitation of a stator in the motor when used to drive a motor. This increases the magnetic induction in lower magnetic fields in particular and reduces the hysteresis loss, with a reduction in the total iron loss of the stator. A motor using this stator core increases in saturation induction under exciting currents of higher frequncies, allowing enhanced motor power.
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Eguchi Shigeki
Hasegawa Hideo
Koshiishi Hiromichi
Ogata Tomiya
Arbes Carl J.
Hi-Z Co., Ltd.
Iijima Nobunaga
Koshiishi Hiromichi
Phan Tim
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