ROTOR AND ROTATING ELECTRIC MACHINE
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United States of America Patent
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Issued Date -
Aug 22, 2024
app pub date -
Aug 23, 2021
filing date -
Aug 23, 2021
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Abstract
Provided is a rotor that enables reduction in iron loss due to harmonics. One magnetic pole is formed by arranging three or more magnetic-pole layers each having a pair of V-shaped magnet slots and permanent magnets. An angle between a q axis and a line parallel to a magnetic-flux output surface of the permanent magnet is defined as a magnetic-pole-layer angle. The magnetic-pole-layer angles in one magnetic pole become smaller as the magnetic-pole layers become closer to a rotary shaft. A shortest distance from the magnet slot to the outer circumferential surface of a rotor core is defined as a bridge width and a shortest distance between the adjacent magnetic-pole layers is defined as a magnetic-pole-layer interval. The magnetic-pole-layer interval is set to be smaller than a sum of the bridge widths of the adjacent magnetic-pole layers.
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