Rotor with a cover plate for securing a magnet in the rotor
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United States of America Patent
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Nov 3, 2009
Grant Date -
Jul 20, 2006
app pub date -
Dec 19, 2005
filing date -
Dec 20, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides a rotor for an electrical motor, e.g. a line-start motor. The rotor comprises a magnet located in a cavity in a rotor core. The core is laminated from sheets of magnetically conductive material and the magnet is secured in the cavity by an end plate which covers the end face. To avoid short circuiting of the magnet, an aperture is provided in the end plate such that a first portion of the opening into the cavity is in communication with the aperture and such that a remaining, second, portion of the cavity is covered by the end plate to secure the magnet in the cavity independently upon the orientation of the end plate around the center axis.
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