Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2006-10-24
2006-10-24
Duda, Rina (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S034000, C318S599000, C310S156010, C310S156330, C310S156360, C310S269000
Reexamination Certificate
active
07126309
ABSTRACT:
The electric machine of the present invention comprises a first coil group containing a plurality of coils and a magnet group. The first coil group is classified into M phase sub coil groups, with the coils of the sub coil groups aligned one at a time in sequence at a specified sub coil group interval Dc from the first phase sub coil group to the M-th phase sub coil group. A sub coil group interval Dc is set to a value of K/M times a magnetic pole pitch Pm (K is a positive integer excluding an integral multiple of M) where the distance corresponding to an electrical angle of π is defined as the magnetic pole pitch Pm. The adjacent sub coil groups are driven at a (K/M)π phase difference. Each coil have substantially no magnetic material core.
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Sagawa Takahiro
Takeuchi Kesatoshi
Duda Rina
Harness & Dickey & Pierce P.L.C.
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