Electricity: motive power systems – Open-loop stepping motor control systems
Reexamination Certificate
2008-03-25
2008-03-25
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Open-loop stepping motor control systems
C318S685000
Reexamination Certificate
active
10808356
ABSTRACT:
A fan motor includes: a single-phase stepping motor including a stator excited by applying an electric current to a coil to function as a single-phase magnetic pole, and a rotor which has a permanent magnet magnetized to a single phase and rotates as the magnetic pole of the stator changes; an impeller which is rotated by a rotating shaft of the rotor; and a drive circuit for controlling an application of a current to the coil. The drive circuit applies pulse voltage to the coil and the coil constant is set so that a mean value of the current applied to the coil is 10 mA or smaller.
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Korean Office Action dated May 17, 2007 with partial English translation.
Kasahara Takashi
Shingai Hiroyuki
Takagi Masaaki
Donovan Lincoln
McCloud Renata
McGinn IP Law Group PLLC
NIDEC Copal Corporation
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