Deriving values of parameters in electrical machines
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United States of America Patent
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Feb 21, 2012
Grant Date -
May 28, 2009
app pub date -
Nov 13, 2008
filing date -
Nov 22, 2007
priority date (Note) -
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Abstract
An electrical drive system includes an electrical machine controlled by an electronic controller and requires control signals representing quantities associated with the operation of the electrical machine. These signals may represent, for example, rotor position and flux or current. A controller includes an estimation routine to use the known magnetic characteristics of the machine and a rotor position signal to provide an estimate of current or of supply voltage.
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