Linear electric motor controller and system for providing linear control
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United States of America Patent
Stats
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Sep 4, 2007
Grant Date -
Mar 27, 2003
app pub date -
Dec 13, 2001
filing date -
Dec 13, 2001
priority date (Note) -
Expired
status (Latency Note)
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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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