Pole-changing permanent magnet machines

  title={Pole-changing permanent magnet machines},
  author={V. Ostovic},
  journal={Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248)},
  pages={2570-2576 vol.4}
  • V. Ostovic
  • Published 2001 in
    Conference Record of the 2001 IEEE Industry…
Electric drives in which discrete speed control is required are today equipped exclusively with squirrel cage induction motors, due to the property of a squirrel cage to have always the same number of poles as the stator winding. Conventional permanent magnet (PM) machines have constant number of poles and can be operated from a constant frequency source only at one speed. If a PM machine is built after the principles of memory motors, one can change its number of poles as simply as in a… CONTINUE READING
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