Electricity: motive power systems – Positional servo systems – Multiple mode systems
Reexamination Certificate
2006-02-07
2006-02-07
Ip, Paul (Department: 2837)
Electricity: motive power systems
Positional servo systems
Multiple mode systems
C318S254100, C318S560000, C318S561000, C318S599000, C369S047280, C369S047380
Reexamination Certificate
active
06995537
ABSTRACT:
One aspect of the present invention provides a motor control system that includes a linear control system operative, in a linear mode, to provide a plurality of control signals for driving an associated motor based on an error signal. The system also includes control logic operative, in a pulse-width modulation (PWM) mode, to provide the plurality of control signals for driving the motor, at least some of the plurality of control signals being pulse-width-modulated signals based on the error signal. An error system generates the error signal based on an indication of a sensed electrical characteristic of the motor relative to a predetermined reference signal. A feedback network is coupled across the error system. The feedback configured to have transfer function characteristics that substantially match responses in the linear mode and the PWM mode of motor control system, which facilitates transitions between the linear mode and the PWM mode.
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El-Sherif Alaa Y.
Plutowski Eugene Francis
Ziemer Kevin W.
Brady W. James
Ip Paul
Swayze, Jr. W. Daniel
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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