EM synchronous motors are designed
and built to industry standards
ANSI, IEC, IEEE and NEMA standards help
both manufacturer and user by providing
definitions and suggested values. They are
continually updated to incorporate the latest
trends in machine use. Although these standards
are gradually coming closer together, this is a long
process. ANSI and/or NEMA provide the
standards for synchronous motors in the United
States, whereas IEC standards provide the
guidelines for European applications. Standards
are a great help in understanding the application
of motors. Please refer to NEMA MGI part 21,
Synchronous Motors, or ANSI C50.