“…With smaller motors, however, the magnetic field is physically changing at a smaller scale, which makes the measurement sensitive to the background, noise, size, and exact positioning of the sensing element and requires much more precise measurement techniques. This applies to the whole dynamics of the motor and makes all measurements, control, and parameter analysis harder [1,2]. It follows that these kinds of external diagnosis methods would be beneficial over classical invasive approaches for diagnosis and fault detection, which require disassembly or dedicated internal sensors.…”