Electricity: motive power systems – Induction motor systems
Reexamination Certificate
2006-01-23
2008-09-09
Leykin, Rita (Department: 2837)
Electricity: motive power systems
Induction motor systems
C318S751000, C318S752000, C310S216006, C310S154030, C310S154090, C310S089000
Reexamination Certificate
active
07423405
ABSTRACT:
In order to obtain an electromagnetic rotating machine of lightweight and high energy efficiency, which produces big torque for rotating a large-diameter fan, a coil A and coil B as excitation coils are disposed on an inner peripheral surface of a fan casing so as to face an outer circumference of the fan, and a coil M as an armature coil crosses at a central portion and is disposed on the outer circumference of the fan. The relationships |Iai|=|Iai+1| and Iai=−Iai+1, or |Ibi|=|Ibi+1| and Ibi=−Ibi+1are obtained respectively for the coil A or coil B by a current control device (not shown). Moreover, the coil A and coil B are subjected to excitation control such that the direction of effective electromagnetic force, which is generated by an interaction between an effective magnetic field formed by the coil A and effective induced current applied to the coil M by the coil B, corresponds to the direction of rotation of the fan.
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Nomura Hiroshi
Okai Keiichi
Tagashira Takeshi
Yanagi Ryoji
Japan Aerospace Exploration Agency
Leykin Rita
Nihon University
Westerman, Hattori, Daniels & Adrian , LLP.
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