INDUCTION MACHINE WITH DUAL PHASE MAGNETIC MATERIAL FOR SENSORLESS CONTROL
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United States of America Patent
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Issued Date -
Oct 15, 2015
app pub date -
Apr 15, 2014
filing date -
Apr 15, 2014
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Abstract
A rotor lamination that is made of a circular laminar element that has multiple rotor bar openings displaced circumferentially around the element and is made of a magnetic material, such as a dual-phase or bi-state magnetic material. A region of the element has received a treatment, thereby rendering the region so that the relative magnetic permeability of the treated region is less than that of the magnetic material. A rotor core assembly and induction machine that incorporates the rotor lamination and method of manufacture of the rotor lamination are also disclosed.
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