公开(公告)号：DE69831164D1

公开(公告)日：2005-09-15

申请号：DE69831164

申请日：1998-09-30

Applicant: ST MICROELECTRONICS SRL

Inventor： BUSACCA SILVIA ,  CUCE ANTONINO ,  CUCUCCIO ANTONINO

IPC: A47L9/19

Abstract: The invention relates to a method and a device for recognising and warning of the level of fullness of a waste container (5) in a suction system driven by a motor (3) and provided with an internal chamber (4) kept under suction pressure and comprising the waste container (5). The method foresees a measurement of the difference of pressure between the internal chamber (4) and the environment outside the vacuum cleaner and an elaboration of such measurement according to a set of rules in fuzzy logic for producing an electric warning signal corresponding to the filling level of the waste container (5).

公开(公告)号：DE69814426D1

公开(公告)日：2003-06-12

申请号：DE69814426

申请日：1998-12-31

Applicant: ST MICROELECTRONICS SRL

Inventor： MILAZZOTTO ANTONINO ,  DI GUARDO MARIO ,  CUCUCCIO ANTONINO ,  NICOSIA NICOLA

IPC: H02M5/293 ,  H02P25/10 ,  H02P7/638

Abstract: The invention relates to a circuit device (1) for driving an A.C. electric load (M), which device is of the type incorporating a rectifying bridge (2) having a first input (A) connected to one terminal (H) of the electric load (M) and a second input (A') connected to an plug (5) of an A.C. mains supply, the rectifying bridge (2) having output terminals (B,B') connected to a power switch (3) which is controlled by an electric signal (PWM). The device comprises a first circuit loop-back path (7) connected in parallel to the electric load (M) and a second circuit loop-back path (8) connected in parallel to the electric load (M), the first (7) and second (8) paths being alternately activated by the positive and negative half-waves of the mains supply when the switch (3) is in its "off" state.