Coreless electric machine apparatus, moving body, robot and manufacturing method of the coreless electric machine apparatus
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United States of America Patent
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Aug 12, 2014
Grant Date -
Dec 6, 2012
app pub date -
May 30, 2012
filing date -
Jun 3, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A coreless electric machine includes: a permanent magnet on a first member; N-phase (N≧2) air-core electromagnetic coils on a second member; and a coil back yoke on the second member, each electromagnetic coil including a conductor bundle in which a conductor is wound M times (M≧2), coil sub-aggregates are provided, each including the N electromagnetic coils of the respective N phases and in each of which a conductor bundle forming an effective coil area of a first-phase electromagnetic coil contacts a second conductor bundle forming an effective coil area of another phase electromagnetic coil, and the second conductor bundle is in an air-core portion of the first phase electromagnetic coil, and the coil sub-aggregates are arranged along the cylindrical area, in which the coil sub-aggregates do not overlap in a radiation direction of the cylindrical area, and adjacent coil sub-aggregates contact each other.
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