Patent ID: 6838790

Claim:
A stator for use in a two rotor single stator type electric motor in which inner and outer rotors are rotated independently in and around the stator upon application of current to the stator, the stator comprising: a stator core including a plurality of stator teeth that are circumferentially arranged around a common axis at evenly spaced intervals leaving a plurality of identical spaces each being defined between adjacent two of the stator teeth, each stator tooth including a plurality of flat magnetic steel plates that are aligned along the common axis while intimately and closely contacting to one another; a plurality of coils put around the stator teeth respectively; bolts that extend through the identical spaces of the stator core in a direction parallel with the common axis for combining the flat magnetic steel plates to have a fixed structure of the stator core; a molded plastic that fills the identical spaces of the stator core; and a plurality of elongate plate bars that extend in the identical spaces through the molded plastic respectively, each elongate plate bar extending in parallel with the common axis and being constructed of a magnetic material that has an electric resistance higher than the bolts.