H - Electricity – 02 – P
Patent
H - Electricity
02
P
318/120, 341/92
H02P 6/02 (1990.01)
Patent
CA 1293789
CONTROL SYSTEM FOR AN ELECTRONICALLY COMMUTATED MOTOR, ELECTRONICALLY COMMUTATED MOTOR SYSTEM, LAUNDRY APPARATUS AND METHODS FOR CONTROLLING SAME Abstract of the Invention Control system for an electronically commutated motor (ECM). The ECM includes a stationary assembly having a plurality 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 of control signals leaving at least one of the winding stages unpowered at any one time while the other winding stages are powered. The control system includes a circuit coupled to the winding stages for simultaneously converting the voltages across the winding stages to digital form thereby to digitize the voltages, and a circuit for producing successive patterns of digital signals in at least one preselected sequence, for selecting the digitized voltage across the at least one unpowered 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 the selected digitized voltage has occurred. Another circuit responds to the successive patterns of the digital signals for generating the successive patterns of the control signals for the commutating circuit. Other control systems, electronical- ly commutated motor systems, laundry apparatus, and methods for controlling them are also described.
615744
Boyd John Henry Jr.
Muller Alexander
Company General Electric
Craig Wilson And Company
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