Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2011-03-08
2011-03-08
Nguyen, Tran N (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S156830, C310S156840
Reexamination Certificate
active
07902713
ABSTRACT:
A self-starting type permanent magnet synchronous motor comprises a stator and a rotor. The rotor comprises a rotor core having a plurality of slots provided in an outer periphery thereof and a cage winding comprising conductive bars embedded in the slots and conductive end rings that short-circuit the conductive bars on both end faces of the bars in an axial direction thereof. The rotor core comprises at least one magnet insertion hole arranged on an inner peripheral side from the slots, and at least one permanent magnet embedded in the at least one magnet insertion hole. When a pole center axis is denoted as a d-axis and an axis deviating from the pole center axis by an electrical angle 90° is denoted as a q-axis, a flux content generated by the cage winding during start-up becomes maximal in the vicinity of and on one of the d-axis and the q-axis.
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Huang Baiying
Kikuchi Satoshi
Kumakura Hideyuki
Mikami Hiroyuki
Miyake Masashi
Antonelli, Terry Stout & Kraus, LLP.
Hitachi Appliances, Inc.
Nguyen Tran N
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