METHOD FOR DETERMINING THE MAGNETIZATION LEVEL OF PERMANENT MAGNETS OF AN ELECTRIC MACHINE AND ELECTRIC MACHINE

摘要

A method of determining the magnetization level of permanent magnets of an electric machine, whereby a probe winding (21) is placed in an electric machine (6) having a stator (12) with a plurality of stator windings (16), and a rotor (13) with a plurality of permanent magnets (20); the probe winding (21) is fixed with respect to the stator (12) and links a magnetic flux produced by the permanent magnets (20); the rotor (13) is rotated at an angular speed (O); an induced electric quantity (VI) is determined at terminals of the probe winding (21) in response to passage of the permanent magnets (20); and the magnetization level of the permanent magnets (20) is determined on the basis of the induced electric quantity (VI) detected.