This guide covers general-purpose synchronous motors without excited rotor windings, and provides design metrics for polyphase alternating-current permanent magnet motors rated 500 horsepower and less.
March 8, 2018—Today, the National Electrical Manufacturers Association (NEMA) published a new standard NEMA SM 1-2017 Guide to General-Purpose Synchronous Motors without Excited Rotor Windings. This guide covers general-purpose synchronous motors without excited rotor windings, and provides design metrics for polyphase alternating-current permanent magnet motors rated 500 horsepower and less.
NEMA SM 1-2017 is available in hard copy and as an electronic download for $285 on the NEMA website.