CONTROL METHOD AND MAGNETIC BEARING

摘要

A magnetic bearing device according to an embodiment of the present invention includes a first stator which includes a first core and a first coil and supports a first rotator and a second stator which includes a second core and a second coil and supports a second rotator. The first core is located apart from the first rotator and encompasses the first rotator. The first coil, which is wound around the first core, receives a current for the first core and the first rotator to reach magnetic saturation and then receives a current in a range where the first core can maintain a magnetic flux density equal to or greater than a certain level so that the first core generates electromagnetic force with a magnetic flux density equal to or greater than a certain level. The second core is located apart from the second rotator and encompasses the second rotator. The second coil, which is wound around the second core, receives a current to make the second core generate electromagnetic force with a magnetic flux density varying at a certain ratio equal to or greater than a certain level according to the value of the applied current.