Control device for three-phase synchronous motor with erroneous wiring detection function

摘要

The present invention provides a control device of a three-phase synchronous motor with a wiring error detection function which can correctly detect the wiring error of the three-phase synchronous motor. If two-phase wiring error or three-phase wiring error exist, a wiring error detection part (8) detects the wiring error of a three-phase power line between an armature current supplying device (3) and the three-phase synchronous motor M with the following states: (1) the q-axis current instruction Iqc becomes a saturation state, (2) the q-axis current feedback signal IqF becomes a value larger than a preset value, and (3) the q-axis current feedback signal IqF and the feedback speed signal VcF become opposite polarities.