Rotatable-drum laundry machine comprising an estimator system configured to estimate the motor-torque of a universal electric motor connected to the laundry drum, and operating method thereof

摘要

Rotatable-drum laundry machine (1) comprising: a casing (2); a laundry drum (3) mounted inside the casing (2) to rotate about an rotation axis (4); and an universal electric motor (6) connected to said laundry drum (3) to rotate laundry drum (3) about said rotation axis (4);
rotatable-drum laundry machine being characterized in comprising an estimator system (9) configured to estimate the motor torque according to the equation: T ‰ m ‹ I RMS + q
wherein T is the motor torque indicating the torque that motor supplied to drum (3); m and q are a first and a second linear parameter, and I RMS is a first value indicating the root mean square current supplied to said universal electric motor (6).