CIRCUITO DI CONTROLLO DI UN MOTORE ELETTRICO DI UN ELETTRODOMESTICO, IN PARTICOLARE UNA LAVABIANCHERIA, LAVASTOVIGLIE O SIMILARI

A control circuit for an electric motor (2) of a household electrical appliance, in particular a washing machine, dishwasher or the like, comprises a unit (1) for controlling the operation of the motor (2) and connected to a usual member (6) for measuring the rotation speed of the usual rotor (7) of this latter, said member (6), advantageously a tachometer dynamo, enabling said unit (1) to verify the correct operation of the motor (2). The dynamo (6) is connected by two electrical branches (8, 9) to two inputs (10, 11) of said unit (1), an electric signal based on the speed measurement made by the dynamo (6) being fed to one of said inputs (10) to be used by the unit (1) to control the motor (6). Into one (8) of said branches (8, 9) there is connected a static switch (14) which is also connected to the other (9) of said branches (8, 9). Any short-circuiting of said dynamo (6) or blockage of said rotor (7) results in inhibition of said switch (14) and hence in a variation in the input electrical signal to said unit (1), this latter then acting on the electric motor.