AbstractOwing to the resent progress in power electronics and permanent magnet materials, a permanent magnet synchronous motor (PMSM) that is lighter, smaller, and more efficient than the conventional induction motor has become realistic as a traction motor. We are making research and development effort on the introduction of the PMSM to rail vehicle traction. The recent development trend of the permanent magnet synchronous traction motor is reviewed. Copyright © 2007 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.