Use of a three-phase frequency converter for controlling a magnetic bearing, in which all phase streams are used to control the bearing

摘要

Use of a three-phase frequency converter (70) for controlling a magnetic bearing (66, 68), in which all phase streams (40, 42, 44) are used to control the bearing, is new. The converter has a proportional current controller for controlling a d-stream and a q-stream of the converter. A first proportional amplification for controlling the d-stream is adjusted smaller than a second proportional amplification for controlling the q-stream. The ratio of the first proportional amplification to the second proportional amplification is 1: 2-4. Preferred Features: The magnetic bearing has a basic excitation winding and a control excitation winding.