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System and method to allow a synchronous motor to successfully synchronize with loads that have high inertia and/or high torque

United States Patent

October 20, 2015
View the Complete Patent at the US Patent & Trademark Office
A mechanical soft-start type coupling is used as an interface between a line start, synchronous motor and a heavy load to enable the synchronous motor to bring the heavy load up to or near synchronous speed. The soft-start coupling effectively isolates the synchronous motor from the load for enough time to enable the synchronous motor to come up to full speed. The soft-start coupling then brings the load up to or near synchronous speed.
Melfi; Michael J. (Richfield, OH)
Baldor Electric Company (Fort Smith, AR)
13/ 432,237
March 28, 2012
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with Government support under agreement no. DE.fwdarw.FG36-08GO180132 awarded by the Department of Energy. The Government has certain rights in this invention. RELATED APPLICATION DATA This application claims the benefit of provisional application Ser. No. 61/614,140, filed Mar. 22, 2012, the disclosure of which is incorporated by reference herein.