Patent Document ID: 20090284211
Application ID: 12268831
Patent Flag: 0

Claim One:
1. A method of estimating electrical parameters associated with an induction motor from a solution vector formed based on known quantities relating to the motor, comprising: forming a source matrix U that includes a plurality of vectors, each having known quantities relating to the motor and each being associated with a different time relative to the other vectors in the source matrix U; forming a source vector y that includes a plurality of elements, each having a known quantity relating to the motor and each being associated with the same time as is each respective vector of the plurality of vectors; determining whether replacing a selected vector of the plurality of vectors in the source matrix U to form a candidate source matrix with a candidate vector having known quantities relating to the motor would satisfy at least a first criterion; responsive to the determining satisfying the first criterion, modifying the source matrix U to replace the selected vector with the candidate vector, and modifying the source vector y to replace a first of the plurality of elements with an element associated with the same time as is the candidate vector; determining whether a condition related to the modified source matrix satisfies at least a second criterion; responsive to the condition satisfying the second criterion, calculating the solution vector from a function including the modified source matrix and the modified source vector to produce at least one electrical parameter associated with the motor; and storing the at least one electrical parameter.