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Design of phase-change 2-speed windings for induction motors, using pole-amplitude modulation techniques

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1 Author(s)
Grant, D. ; University of Bristol, Department of Electrical & Electronic Engineering, Bristol, UK

Pole-amplitude/modulation is a well known technique for obtaining two speeds from an induction motor with a single stator winding. In PAM windings, pole changing is achieved by reversing coils. It has been shown that pole changing can also be achieved in a 3-phase motor by connecting coils to a different phase. Combining this principle with a technique devised for the design of PAM windings leads to the development of 2-speed windings with low harmonic content and high winding factors.

Published in:

Electric Power Applications, IEE Proceedings B  (Volume:130 ,  Issue: 1 )