MOTOR CONTROLLER

摘要

PROBLEM TO BE SOLVED: To provide a motor controller capable of properly driving a motor using an accurately estimated rotation angle, when a rotation angle detecting means fails, without causing significant increase.

SOLUTION: In a normal state in which there is no failure occurring in a resolver 2, a motor 1 is controlled using a detected rotation angle θSdetected by the resolver 2. If a failure occurs in the resolver 2, the motor 1 is controlled by using an estimated rotation angle θEcalculated by a rotation angle estimating section 31. When the resolver 2 in a normal state, a detected induction voltage ESαβfrom a rotation angle speed ω obtained from the detected rotation angle θS. An estimated induced voltage EEαβis calculated, based on a two-phase voltage command value Vαβand a two-phase detection current Iαβ. Based on the comparison of these voltages, a correction value Cαβfor correcting the estimated induction voltage EEαβis generated and is written in a corrected value storage section 30. The rotation angle estimating section 31 corrects the estimated induction voltage EEαβby the correcting value Cαβ, and an estimated rotation angle θEis obtained by using the corrected estimated induced voltage.

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