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US 6,297,574 B1Granted
Magnetic bearing apparatus
AssigneeLust Antriebstechnik GmbH
InventorsReto Schöb, Peter Jenckel, Hans-Georg Reiter
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AssigneeLust Antriebstechnik GmbH
InventorsReto Schöb, Peter Jenckel, Hans-Georg Reiter
Estimating the term…
A magnetic bearing apparatus for the journalling of a body (3), in particular of a rotor (3), comprises a stator (2) with a control winding (22) having at least three loops (22a, 22b, 22c) for the production of a magnetic control field by means of which the position of the body (3) relative to the stator (2) can be regulated, with each loop (22a, 22b, 22c) belonging to a different electrical phase, and a control device (4) which in a first operating mode supplies each loop (22a, 22b, 22c) with in each case a phase current (Ia, Ib, Ic) or in each case a phase voltage (Ua, Ub, Uc) as a control parameter. Means are provided in order to regulate the control parameter for each loop (22a, 22b, 22c) independently of the control parameter for the other loops (22a, 22b, 22c) as well as a monitoring unit (5) which can switch the bearing apparatus into a second operating mode in which a reduced number of phases, which is at least two, produces the magnetic control field.
Magnetic bearing apparatus for journalling a body comprising a stator with a control winding consisting of three loops for producing a magnetic control field for regulating a position of the body relative to the stator, each loop belonging to a different electrical phase, a control device which in a first operating mode supplies each loop with a phase current or a phase voltage as a control parameter, a control unit for regulating the control parameter for each loop independently of the control parameters for the other loops, and a monitoring unit for switching the bearing apparatus into a second operating mode in which a reduced number of only two phases produces the magnetic control field.
Magnetic bearing apparatus for journalling a body comprising a stator with a control winding consisting of first, second and third loops only for producing a magnetic control field for regulating a position of the body relative to the stator, the first, second and third loops respectively belonging to different first, second and third electrical phases, a control device which in a first operating mode supplies each loop with a phase current or a phase voltage as a control parameter, a control unit for regulating the control parameter for each loop independently of the control parameters for the other loops, and a monitoring unit responsive to the occurrence of a fault in the first phase for switching the bearing apparatus, upon the occurrence of the fault, into a second operating mode in which the second and third fault-free phases only produce the magnetic control field.
Dependencies are inferred from the claim text.