Method and apparatus for detecting faults in a resolver
AssigneeGeneral Electric Company
InventorsAidan W. Clark, Kenneth F. Cook, Robert D. Wittenbach, Deepak M. Kamath
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Abstract
A method for detecting fault in a resolver generating a sine voltage and a cosine voltage. The method includes obtaining a sum of a square of the sine voltage and a square of the cosine voltage. The sum is filtered through a first filter having a first time constant to generate a first filter output. The sum is also filtered through a second filter having a second time constant to generate a second filter output. The first filter output and second filter output are compared to detect a fault in the resolver.
Claims15
A method for detecting fault in a resolver generating a sine voltage and a cosine voltage, the method comprising:
- obtaining a sum of a square of the sine voltage and a square of the cosine voltage;
- filtering said sum through a first filter having a first time constant to generate a first filter output;
- filtering said sum through a second filter having a second time constant to generate a second filter output;
- and,
- comparing said first filter output and said second filter output to detect a fault in the resolver.
An apparatus for detecting fault in a resolver generating a sine voltage and a cosine voltage, the apparatus comprising:
- a first filter for filtering a sum of a square of the sine voltage and a square of the cosine voltage, said first filter having a first time constant to generate a first filter output;
- a second filter for filtering the sum of a square of the sine voltage and a square of the cosine voltage, said second filter having a second time constant to generate a second filter output;
- and,
- comparison circuitry for comparing said first filter output and said second filter output to detect a fault in the resolver.
Dependencies are inferred from the claim text.