AC.Motors-Introduction
AC motors.are.used.worldwide.in.many.applications.to.
transform.electrical.energy.into.mechanical.energy..There.are. many.types.of.AC.motors,.but.this.course.focuses.on.three- phase AC
induction motors,.the.most.common.type.of.motor. used.in.industrial.applications..
An.AC.motor.of.this.type.may.be.part.of.a.pump.or.fan.or.
connected.to.some.other.form.of.mechanical.equipment.such. as.a.winder,.conveyor,.or.mixer..Siemens.manufactures.a.wide. variety.of.AC.motors..In.addition.to.providing.basic.information.
about.AC.motors.in.general,.this.course.also.includes.an.
overview.of.Siemens.AC.motors.
NEMA Motors
National Electrical Manufacturers Association (NEMA). NEMA
develops standards for a wide range of electrical products,
including AC motors. For example, NEMA Standard Publication
MG 1 covers NEMA frame size AC motors, commonly referred
to as NEMA motors.
develops standards for a wide range of electrical products,
including AC motors. For example, NEMA Standard Publication
MG 1 covers NEMA frame size AC motors, commonly referred
to as NEMA motors.
Above NEMA Motors
In addition to manufacturing NEMA motors, Siemens also
manufactures motors larger than the largest NEMA frame
size. These motors are built to meet specific application
requirements and are commonly referred to as above NEMA
motors.
manufactures motors larger than the largest NEMA frame
size. These motors are built to meet specific application
requirements and are commonly referred to as above NEMA
motors.
IEC Motors
Siemens also manufactures motors to International
Electrotechnical Commission (IEC) standards. IEC is another
organization responsible for electrical standards. IEC standards
perform the same function as NEMA standards, but differ
in many respects. In many countries, electrical equipment
is commonly designed to comply with IEC standards. In the
United States, although IEC motors are sometimes used,
NEMA motors are more common. Keep in mind, however,
that many U.S.-based companies build products for export to
countries that follow IEC standards.
Electrotechnical Commission (IEC) standards. IEC is another
organization responsible for electrical standards. IEC standards
perform the same function as NEMA standards, but differ
in many respects. In many countries, electrical equipment
is commonly designed to comply with IEC standards. In the
United States, although IEC motors are sometimes used,
NEMA motors are more common. Keep in mind, however,
that many U.S.-based companies build products for export to
countries that follow IEC standards.
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