Active rectification of alternator output without using a position sensor
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United States of America Patent
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Sep 18, 2007
Grant Date -
Jun 21, 2007
app pub date -
Dec 21, 2005
filing date -
Dec 21, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed herein is an automotive electrical system including a FET based rectifier and method of controlling the FET based rectifier without using either an alternator shaft position sensor or current sensors on each phase of the alternator output to control the switching of the FETs. In accordance with the teachings herein, the voltage and current on the DC bus of the automotive electrical system are sensed and switching of the FETs is controlled by a microcontroller that determines the appropriate switching times based on these sensed parameters.
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