Electricity: motive power systems – Positional servo systems – 'reset' systems
Reexamination Certificate
2011-06-28
2011-06-28
Masih, Karen (Department: 2837)
Electricity: motive power systems
Positional servo systems
'reset' systems
C318S632000, C318S701000
Reexamination Certificate
active
07969112
ABSTRACT:
A method of estimating stator resistance of a permanent magnet synchronous machine, when the permanent magnet synchronous machine is controlled with an inverter using a control system having an adaptive observer which is augmented with a signal injection, the adaptive observer having a stator resistance estimate ({circumflex over (R)}s) as a parameter, in which method an error signal (ε) is obtained from the signal injection, a speed correction term (ωε) is calculated from the error signal (ε), the rotor position estimate is corrected using the speed correction term (ωε) in the adaptive observer, whereby the error signal (ε) is driven to zero. The method comprises the step of correcting the value of the stator resistance estimate ({circumflex over (R)}s) in the adaptive observer when the speed correction term (ωε) differs from zero.
REFERENCES:
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European Search Report dated Oct. 15, 2007.
ABB Oy
Buchanan & Ingersoll & Rooney PC
Masih Karen
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