Patent ID: 7936145

Claim:
An electronically commutated asynchronous motor ( 12 ) comprising: a stator ( 202 ), a short-circuit rotor ( 204 ), a controller ( 20 ) for field-oriented regulation (FOR) of the motor ( 12 ), a sensor magnet ( 274 ) that is in thermally conductive connection with the short-circuit rotor ( 204 ), a rotor position sensor ( 14 A; 18 ; 18 ′) arranged at a distance (d) from said sensor magnet ( 274 ) to generate, during operation, an output signal (HALL, U, U 1 , U 2 ) that is dependent upon the spatial orientation of the sensor magnet ( 274 ), a temperature evaluation apparatus (CALC_T 44 ) that is configured to ascertain during operation, from the output signal (HALL, U, U 1 , U 2 ), a temperature value (T) that is suitable for characterizing a temperature (T_SM, T_S) in the motor ( 12 ), and a data memory ( 25 , 320 ) for storing motor system data measured at the motor ( 12 ) during operation at a predetermined temperature.