Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2005-11-28
2010-06-29
Benson, Walter (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S768000, C318S773000
Reexamination Certificate
active
07746025
ABSTRACT:
A variable speed motor includes a main winding including first and second main windings, and an auxiliary winding including first and second auxiliary windings, wherein the main winding and the auxiliary winding are wound on a stator to form a plurality of poles, and a plurality of relays for performing a switching operation between serial/parallel connections of the first and second main windings or the first and second auxiliary windings. The variable speed motor includes a stator on which a 4-pole winding and a 12-pole winding arc wound, a plurality of tap windings connected in series to a 4-pole main winding forming 4 poles, for extending a variable range of rotation speed of the motor during a 4-pole operation mode, and a phase control circuit for varying rotation speed of the motor by controlling a phase of an input power-supply signal during a 12-pole operation mode.
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Choi Byung Keol
Kim Dong Won
Lee Dong Soo
Min Byoung Wook
Benson Walter
Birch & Stewart Kolasch & Birch, LLP
Colon-Santana Eduardo
LG Electronics Inc.
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