Permanent magnet rotor for an electronically commutated DC motor
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United States of America Patent
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Apr 11, 2017
Grant Date -
Dec 10, 2015
app pub date -
Aug 18, 2015
filing date -
Apr 11, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In a DC motor, a permanent magnet rotor comprising a shaft, a rotor sheet packet supported by the shaft, which rotor sheet packet comprises close to the periphery thereof completely closed and tangentially extending rectangular recesses for receiving planar permanent magnet plates. At least one permanent magnet plate is accommodated in each recess, the permanent magnet plates are held by spring elements free of play by force locking, the recesses have free spaces connected to the permanent magnet plates in the tangential direction, which free spaces extend across the major part of the side surfaces of the permanent magnet plates and the rotor sheet packet consists essentially of a radial outer annular region and a radial inner core region, wherein the annular region in a large part is delimited by the recesses and the free spaces and is integral with the core region via thin radial webs.
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