Rotor of motor which uses magnets to achieve variation-free torque
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United States of America Patent
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Apr 17, 2018
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N/A
app pub date -
Sep 14, 2015
filing date -
Oct 31, 2012
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Abstract
A rotor (10) of a motor includes a rotor core (11) and a plurality of magnets (14a, 14b) which are arranged at a circumferential surface of the rotor core or at the inside of the rotor core, the length of a magnet of the plurality of magnets in the axial direction of the rotor core determined in accordance with the residual magnetic flux density of the magnet. The axial direction length of the magnet is preferably determined by multiplying a reference axial direction length of the magnet with the residual magnetic flux density of the magnet and dividing this by a reference residual magnetic flux density of the magnet.
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