STEERING MOTORS POWER SUPPLY METHOD AND POWER SUPPLY SYSTEM ADAPTED TO SUCH A METHOD
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United States of America Patent
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Issued Date -
Oct 4, 2012
app pub date -
Dec 17, 2009
filing date -
Dec 17, 2009
priority date (Note) -
Abandoned
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Abstract
A method is provided for controlling power supply of an electrically powered steering system on-board an automotive land vehicle equipped with a high voltage source and a low voltage source. A first and a second steering motor operate at a nominal operating voltage which is higher than the voltage of the low voltage source, are fed by the high voltage source and may absorb respectively a first and a second nominal operating power. A step-up circuit is connected to the low voltage source, and is adapted to deliver a back-up electrical power in case of failure of the high voltage source. In the method, in case of failure of the high voltage source, back-up electrical power absorbed by each of the two motors is limited on the basis of a priority rule.
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