Patent ID: 6745767
Filing Date: 2004-06-08
Classification: A61M,F16C

Abstract:
A respiration system, comprising:an electrically driven rotary compressor gas delivery unit with a housing, a compressor wheel with an axial magnetic bearing element, a radial magnetic bearing element and a rotary drive element, a rotary drive associated with said housing and cooperating with said rotary drive element, an axial magnetic bearing associated with said housing and cooperating with said axial magnetic bearing element, and a radial magnetic bearing associated with said housing and cooperating with said radial magnetic beating element, said axial magnetic bearing and said radial magnetic bearing supporting said compressor wheel axially and radially during rotation of said compressor for operation, wherein said axial magnetic bearing and said radial magnetic bearing are each active magnetic bearings with electrically energized coils; and a control and evaluating unit receiving signals corresponding to speed of rotation of said compressor wheel and power consumption of the individual active magnetic bearings and calculating the state of imbalance of said compressor wheel from the measured speeds of rotation of said compressor wheel and the necessary power consumption of the individual active magnetic bearings and compensating by controlling compressor mounting support such that said compressor wheel will no longer rotate around its geometric axis of rotation but around a principal axis of inertia of said compressor wheel.