Provided is a control method and a control system (200) for controlling the insertion of a plurality of magnets (110) within an electrical machine (100) including a stator (102) and a rotor (104) which rotates in relation to the stator around a rotary axis (Ra). The control system (200) has plurality of sensors (205) which continuously sense an air gap (106) between the rotor (104) and the stator (102), an encoder (210) which continuously detects an angular position of the rotor (104), and a processor (215) which receives data from the sensors (205) and the encoder (210) and determines in real-time an insertion order for inserting the plurality of magnets (110) in a surface of the rotor (102). The control system (200) applies a feedback loop while performing the insertion process to adjust the insertion order based on changes in the data received.