Patent ID: 7312594
Filing Date: 2007-12-25
Classification: H02P

Abstract:
1. A control system for a synchronous machine, comprising: a converter for converting DC voltage to AC voltage or AC voltage to DC voltage; said synchronous machine being driven by said converter; a magnetic pole position presuming device for performing a presuming operation to presume a magnetic pole position of said synchronous machine based on high-frequency components of a voltage applied to said synchronous machine and a current flowing into said synchronous machine; and a control device for controlling said converter based on said magnetic pole position presumed by said magnetic pole position presuming device; said control device controlling said converter so as to include high-frequency components of a voltage or a current spatially in the direction at least orthogonal to said high-frequency components of said voltage or said current used in said presuming operation when no vector satisfying the linearly independent condition is contained in said high-frequency components of said voltage or said current used in said presuming operation.