Electric motor having asymmetric configuration for generating unbalanced force
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United States of America Patent
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Nov 12, 2019
Grant Date -
Jun 20, 2019
app pub date -
Dec 18, 2017
filing date -
Dec 18, 2017
priority date (Note) -
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Abstract
An electric motor includes a rotor having a stack of laminations positioned axially relative to one another. The stack of laminations includes a first rotor lamination that is divided into a first portion and a second portion. The first rotor lamination is configured to have an asymmetric mass distribution such that the first portion has a first mass and the second portion has a second mass, with the first mass being different from the second mass. The electric motor is configured to selectively generate an unbalanced force during operation (i.e., when the rotor is spinning). The electric motor may include a stator configured to have an asymmetric magnetic field distribution. The electric motor may be employed in a haptic assembly and eliminates the need for a separate eccentric mass to generate a haptic signal.
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