skip to main content

Title: Dovetail spoke internal permanent magnet machine

An internal permanent magnet (IPM) machine is provided. The IPM machine includes a stator assembly and a stator core. The stator core also includes multiple stator teeth. The stator assembly is further configured with stator windings to generate a stator magnetic field when excited with alternating currents and extends along a longitudinal axis with an inner surface defining a cavity. The IPM machine also includes a rotor assembly and a rotor core. The rotor core is disposed inside the cavity and configured to rotate about the longitudinal axis. The rotor assembly further includes a shaft. The shaft further includes multiple protrusions alternately arranged relative to multiple bottom structures provided on the shaft. The rotor assembly also includes multiple stacks of laminations disposed on the protrusions and dovetailed circumferentially around the shaft. The rotor assembly further includes multiple pair of permanent magnets for generating a magnetic field, which magnetic field interacts with the stator magnetic field to produce a torque. The multiple pair of permanent magnets are disposed between the stacks. The rotor assembly also includes multiple middle wedges mounted between each pair of the multiple permanent magnets.
 [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Ballston Lake, NY
  2. Niskayuna, NY
  3. Clifton Park, NY
  4. Latham, NY
  5. West Coxsackie, NY
Publication Date:
OSTI Identifier:
Report Number(s):
US patent application 12/432,894
DOE Contract Number:
Resource Type:
Research Org:
General Electric Company (Niskayuna, NY)
Sponsoring Org:
Country of Publication:
United States