Electric motor, control device, and motor control system
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United States of America Patent
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Mar 23, 2021
Grant Date -
Nov 9, 2017
app pub date -
Oct 29, 2015
filing date -
Nov 3, 2014
priority date (Note) -
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Abstract
In an electric motor, a magnetic bearing generates an electromagnetic force between multiple permanent magnets and a coil and rotatably supports an other side of a rotation shaft in an axis line direction. The rotation shaft is configured to be capable of being inclined with a rotation center line using a bearing side of the rotation shaft as a fulcrum. An electronic control device controls a current that flows to the coil such that an axis line of the rotation shaft approaches the rotation center line due to a supporting force which is the electromagnetic force between the multiple permanent magnets and the coil. Accordingly, the rotation shaft is rotatably supported to be freely rotatable by a magnetic bearing and the bearing.
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