Patent ID: 9217467
Filing Date: 2015-12-22
Classification: F16C

Abstract:
1. A method for operating a three-phase inverter of a converter-fed magnetic bearing, the magnetic bearing comprising a first coil located at an upper magnetic armature and having a first terminal connected to a first output of the inverter and a second coil located at a lower magnetic armature and having a first terminal connected to a second output of the inverter, wherein second terminals of the first and second coils are connected to a third output of the inverter, the method comprising: injecting a variable control current into the third output of the inverter, with the variable control current being divided between the first and second coils and the first and second outputs of the inverter connected thereto, and injecting a constant bias current into the first output and the second output of the inverter and the coils connected in series between the first output and the second output, thereby causing corresponding phase currents to be generated in the first and second coils and the first and second outputs connected to the first and second coils from the difference between the variable control current and the constant bias current, while taking into account polarities of the variable control current and the constant bias current.