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Industry requires
improved motor power density and increased efficiency
Permanent Magnet Motors meet these needs
Due to dramatic improvements in PM materials, these types
of motors are now viable alternatives to standard induction motors
Laminated RPM-AC frame allows more room for active
material creating a power dense package
Frame construction improves thermal transfer and heat
dissipation capability of the motor
Efficiency of PM motors is a band level higher than
induction cast iron frame motors
Mechanical
Advantages:
RPM-AC
motors run at slow speed eliminating excessive vibration from the system
Noise
levels for PM motors are reduced over the traditional cooling tower
design
Baldor
Cooling Tower Motor requires less maintenance
Bearing
lubrication once per year
PM Motor Improvements