of the stator 5 projecting towards the board 18 in the case of the solution being shown the first and second connectors 22 and 24 respectively are connectors of the male female fast clutch type such as for example fastom connectors advantageously the electronic board 18 of the device 50 as highlighted in fig2 incorporates at least one accelerometer 51 connected to the tank 2 by means of a fast connector connection and intended to constantly monitor the acceleration or better the inertial acceleration forces of the tank 2 generated by a resultant of the load unbalance forces in the rotary drum 2 a in an indirect way this measure allows a load unbalance in the rotary drum 2 a to be determined the accelerometer 51 in the electronic board 18 associated with the stator 5 also allows the unbalance of the electronic board 18 as well as of the whole washing machine 1 to be indirectly determined the synchronous electric motor 3 and thus the stator 5 being substantially integral with the tank 2 thanks to the locking means 70 and the tank 2 with the structure of the washing machine 1 by means of the usual connections in greater detail the heat.