Electric motor, hoisting machine and elevator system
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United States of America Patent
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Dec 8, 2015
Grant Date -
Mar 20, 2014
app pub date -
Nov 25, 2013
filing date -
Mar 31, 2010
priority date (Note) -
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Abstract
An electric motor, a hoisting machine and also an elevator system are disclosed. The electric motor includes a stator, which stator includes slots, into which slots a concentrated winding is fitted. The electric motor also includes a rotating rotor, which rotor includes permanent magnets placed consecutively in a ring in the direction of the rotational movement. The ratio (LM/LP) of the width of a permanent Lp magnet at the point (LM) of the center line of the magnet and the width (Lp)′ of a magnetic pole of the rotor is at least ⅔ and at most ⅘.
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