Method for sensorless position determination of the rotor of electronically commutated synchronous machines

摘要

The invention relates to a method for the sensorless determination of the rotor position of an electronically commutated polyphase EC motor (1) having a rotor (2), a stator (3) and a commutation device (4) for generating phase currents in the coil system (5) of the stator (3) by impressing a test signal in the coil system (5), measuring the current value i in the string during the measurement phase (PHMess) as current response of the test signal, calculation of | i | for envelope determination of the current response and determination of the rotor position therefrom.