An electric-motor-control system with current sensor offset correction includes three current-sensors and a controller. Each of the three current-sensors is used to detect current through one of three windings of a Y-connected motor. The controller is in communication with the three current-sensors. The controller records periodically measurements of sensed-current indicated by each current-sensor while variable-current flows through each of the three windings, determines an x-offset and a y-offset of a rotating-vector indicated by a plurality of the measurements, and determines an offset-current of each of the three current-sensors based on the x-offset and the y-offset.
Electric motor control system with current sensor offset correction
2018-08-21
Patent
Elektronische Ressource
Englisch
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