Rotary electric machine having annular rotor core with slits
AssigneeDenso Corporation
InventorShin Kusase
Life of this patent
Estimating the term…
Abstract
In an alternating current generator, a rotor is provided radially inside a stator core. A rotor core has a cylindrical boss press-fit around a rotor shaft, disc portions extending from an outer periphery of the boss in a radial direction, and claw pieces in connecting with the disc portions radially outside the boss. A field winding is provided between the boss and claw pieces. An annular core is provided on an outer periphery of the claw pieces. The annular core is made of a stack of core sheets and has slits formed in the radial direction. Iron loss is decreased and leaks of magnetic fluxes in the annular core are suppressed by the slits.
Claims6
A rotary electric machine comprising:
- a stator having a stator core that is wound with multi-phase windings;
- and
- a rotor located radially inside the stator core to generate magnetic fields, wherein the rotor has a rotor shaft, a cylindrical boss fixed around the rotor shaft, disc portions extending from an outer periphery of the boss in a radial direction, claw pieces connected with the disc portions radially outside the boss, a field winding located between the boss and claw pieces, and an annular core located on an outer periphery of the claw pieces, wherein the annular core is made of a stack of core sheets and has slits extending in the radial direction.
Dependencies are inferred from the claim text.