Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2004-10-08
2008-12-30
Benson, Walter (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S779000
Reexamination Certificate
active
07471058
ABSTRACT:
A starting device and starting method for a single-phase induction motor, housing: a stator having a running coil and a starting coil; a running switch and a starting switch which is conducted to an open condition upon completion of the motor start. The starting device includes: a starting circuit including a control unit which receives, from a current sensor, signals representative of the current level being supplied to the stator, the control unit being connected to the running and the starting switches, for instruction the open and closed conditions thereof; the open condition of the starting switch being defined when the ratio between the present current level supplied to the stator and the starting current level, upon the closing of the starting and the running switches, reaches a predetermined value.
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International Search Report for International Application No. PCT/BR2004/000197, date of mailing Feb. 7, 2005.
Duarte Ronaldo Riberio
Medeiros Neto Luiz Magalhaes
Schwarz Marcos Guilherme
Benson Walter
Darby & Darby P.C.
Empresa Brasileira De Compressores S.A.
Paul Antony M
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