A Historical Overview and Current Trends on Magnets, Electric Machines, and Drives
Dal Ohm, Ph.D., President, Drivetech, Inc.

Ever since Magnetism was first discovered by a shepherd named Magnes in Greece, applications of magnetic properties were slowly spread and evolved world-wide. With the invention of battery and discoveries on electricity and magnetic field, various types of electric motors/generators were invented during 1800s-1900s, and used for electrical power systems and high-power motors. After development of power semiconductors and electronic circuit, motor-generator control and drive technology has been advanced to high efficiency and precise control.  This presentation will summarize past historical events and current technologies, then discuss on near-future advancement and applications of motor-generators with drives.

Dal Y. Ohm is founder and president of Drivetech Inc., a consulting company in motor drives and power converter hardware/software and systems for more than 20 years. He received MS and Ph. D in EE from Texas A&M University. Previously, he was with Baldor Electric Company (ABB) and Kollmorgen Motion Technology Group (Danaher). He has been leading technical workshops at many conferences and invited at various industrial and government organizations for private courses. He also taught engineering courses at universities including San Jose State University, NPU, etc.

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