Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2005-08-19
2010-12-28
Benson, Walter (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S799000, C318S798000, C318S767000, C318S727000, C318S768000
Reexamination Certificate
active
07859217
ABSTRACT:
A motor controller system comprises solid state switches for connection between a single phase to three phase static converter and motor terminals for controlling application of three phase power to the motor. Sensors sense power from the static converter. A control is connected to the sensors and the solid state switches for controlling operation of the solid state switches to run the motor. The controller includes a three phase detection scheme for preventing operation of the solid state switches in the absence of desired three phase power from the static converter. A motor start scheme disables the three phase detection scheme for a select time after a motor run signal.
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Benson Walter
Kowalewski Filip A.
Luo David S
Siemens Industry Inc.
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