Fecha de publicación: 31/12/1991 Fuente: Wipo "digitalization" CONTROL SYSTEM FOR AN ELECTRONICALLY COMMUTATEDMOTOR, ELECTRONICALLY COMMUTATED MOTOR SYSTEM,LAUNDRY APPARATUS AND METHODS FOR CONTROLLING SAME Abstract of the Invention Control system for an electronically commutatedmotor (ECM). The ECM includes a stationary assembly having aplurality of winding stages adapted to be selectively commu-tated, and rotatable means associated with the stationary as-sembly in selective magnetic coupling relation with the wind-ing stages. A circuit commutates the winding stages by selec-tively supplying power thereto in response to a pattern ofcontrol signals leaving at least one of the winding stagesunpowered at any one time while the other winding stages arepowered. The control system includes a circuit coupled to thewinding stages for simultaneously converting the voltagesacross the winding stages to digital form thereby to digitizethe voltages, and a circuit for producing successive patternsof digital signals in at least one preselected sequence, forselecting the digitized voltage across the at least oneunpowered winding stage depending on the digital signal pat-tern produced, and for producing a following pattern in se-quence after at least one predetermined logic level of theselected digitized voltage has occurred. Another circuitresponds to the successive patterns of the digital signals forgenerating the successive patterns of the control signals forthe commutating circuit. Other control systems, electronical-ly commutated motor systems, laundry apparatus, and methodsfor controlling them are also described.