METHOD FOR SENSORLESS DRIVE CONTROL OF AN ELECTRIC VEHICLE AND DRIVE CONTROL OPERATING ACCORDING TO SAID METHOD

摘要

A method for the sensorless drive control of an electric vehicle, especially an industrial truck, driven by a rotating field motor operated by a power converter, the power converter being supplied by an associated constant voltage source, includes calculating actual values of the flow chain of the rotating field motor and at least one other variable dependant on the actual values from a recorded stator voltage and at least n-1 measured phase flows, and regulating the stator flow of the rotating field drive, which is defined by the phase flows, based upon the actual values.