Electricity: motive power systems – Switched reluctance motor commutation control
Reexamination Certificate
2005-09-27
2005-09-27
Leykin, Rita (Department: 2837)
Electricity: motive power systems
Switched reluctance motor commutation control
C318S132000, C318S434000, C318S600000, C318S601000, C318S609000, C388S828000, C388S833000, C388S834000, C388S838000
Reexamination Certificate
active
06949900
ABSTRACT:
A processor for controlling a sensorless, brushless DC motor is disclosed comprising a first output for providing a control signal to a potentiometer controlling the speed and voltage of the DC motor. The processor also includes a second input for receiving a back-EMF voltage from an open phase of a three phase winding. The processor determines a digital error signal from the back-EMF voltage and generates a control signal responsive to the digital error signal. The control signal decreases the speed of the motor when the digital error signal is in a first range. The processor decreases both the speed and voltage of the motor when the digital error signal is in a second range. The processor increases the speed of the motor when the digital error signal is in a third range. The processor increases both the speed and voltage of the motor when the digital error signal is in a fourth range.
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Howison & Arnott , L.L.P.
Leykin Rita
Silicon Laboratories Inc.
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