Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2007-08-01
2009-11-24
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C388S801000, C326S046000
Reexamination Certificate
active
07622885
ABSTRACT:
The invention relates to a method of, and system for, linear speed control for an electric motor, in which a digital to analog converter means is used for converting an 8-bit digital signal to an analog voltage for setting voltage across a motor, a digital state machine means is used for converting the duty cycle of an input signal for output to the digital to analog converter means, and a closed loop feedback loop means is used for monitoring and setting the voltage across the motor. An over-current sense circuit can be used for monitoring the current across the electric motor. An over/under voltage sense circuit can be used for monitoring voltage of the electric motor. The resulting 8-bit digital control signal is converted to an analog voltage for the electric motor. Such methods and systems find particular use in automotive applications.
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2112376 Ontario Limited
Glass Erick
Haynes and Boone LLP
Ro Bentsu
LandOfFree
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