Abstract: A motor control device includes a power inverter, a phase converter, and a detector. The power inverter is configured to convert input power for a motor into a three-phase alternating current. The phase converter is configured to convert the three-phase alternating current into a two-phase alternating current having a d-axis current component and a q-axis current component. The detector is configured to detect a misconnection between current detectors which are each configured to detect the three-phase alternating current.

Abstract: A motor control device includes a power inverter, a phase converter, and a detector. The power inverter is configured to convert input power for a motor into a three-phase alternating current. The phase converter is configured to convert the three-phase alternating current into a two-phase alternating current having a d-axis current component and a q-axis current component. The detector is configured to detect a misconnection between current detectors which are each configured to detect the three-phase alternating current.

Abstract: A control system for a synchronous machine including a converter for converting DC voltage to AC voltage or AC voltage to DC voltage. The synchronous machine is driven by the converter. The control system further includes a magnetic pole position presuming device for performing a presuming operation to presume a magnetic pole position of the synchronous machine based on high-frequency components of a voltage applied to the synchronous machine and a current flowing into the synchronous machine, and a control device for controlling the converter based on the magnetic pole position presumed by the magnetic pole position presuming device. The control device controls the converter so as to contain significant high-frequency components in the voltage or the current used in the presuming operation when a mean voltage or a mean current output from the converter is spatially in a region close to a straight line containing starting and ending points of non-zero voltage vector output from the converter.

Abstract: A control system for a synchronous machine including a converter for converting DC voltage to AC voltage or AC voltage to DC voltage. The synchronous machine is driven by the converter. The control system further includes a magnetic pole position presuming device for performing a presuming operation to presume a magnetic pole position of the synchronous machine based on high-frequency components of a voltage applied to the synchronous machine and a current flowing into the synchronous machine, and a control device for controlling the converter based on the magnetic pole position presumed by the magnetic pole position presuming device. The control device controls the converter so as to contain significant high-frequency components in the voltage or the current used in the presuming operation when a mean voltage or a mean current output from the converter is spatially in a region close to a straight line containing starting and ending points of non-zero voltage vector output from the converter.