Rotor with permanent magnets with flux concentration for rotary electrical machine
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United States of America Patent
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Jun 11, 2019
Grant Date -
May 18, 2017
app pub date -
Jun 2, 2015
filing date -
Jun 5, 2014
priority date (Note) -
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Abstract
A rotor with permanent magnets for a rotary electric machine including a plurality of alternating north poles and south poles and made up of a plurality of permanent magnets arranged in first recesses extending axially and distributed regularly between a circumferential portion and a central portion of the magnetic mass of the rotor such as to define a plurality of circumferential polar sections, the first recesses being separated by central tabs with a thickness E, the permanent magnets having a polygonal radial section that comprises a substantially rectangular portion next to the circumferential portion adjacent to a substantially trapezoidal portion next to the central portion. The rotor having a ratio R0 (h/E) of a first height h of the trapezoidal portion to the thickness E of a central tab is predetermined such as to maximize the efficiency of the electric machine.
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