METHOD AND DEVICE FOR CONTROLLING A BRUSHLESS DIRECT-CURRENT MOTOR

摘要

The invention relates to a brushless direct-current motor (1) comprising a permanent magnet (12a) arranged on a rotor (12) and a stator with windings. The temperature (T_W) of the windings is determined. An observer (28) is used to estimate the temperature (T_M) of the permanent magnet (12a) according to the temperature (T_W) of the windings. A regulating signal for controlling the direct-current motor (1) is determined according to the estimated temperature (T_M) of the permanent magnet (12a).