Charging system having a controlled rectifier bridge and a single voltage sensor
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United States of America Patent
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-
Apr 10, 2001
Grant Date -
N/A
app pub date -
May 11, 1999
filing date -
May 11, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A charging system has an alternator, a battery, and a controlled rectifier bridge between the alternator and the battery. The controlled rectifier bridge has controllable elements. A controller is provided wherein the controller controls (a) the duty cycle of the alternator field winding and (b) the switching in the controllable elements to control the phase advance angle. By utilizing a half-wave controlled rectifier bridge and three controllable elements, power output can be increased at a low overall cost. In another embodiment, the controller determines switching points for the controllable elements through a third harmonic extraction device which employs a neural network for determining the zero crossings of the third harmonic voltage obtained from a single phase voltage.
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