AboutAaron Overbeek Expertise I am a Six Sigma Master Black Belt and Lean Champion. My expertise ranges from tacticle (local) implementation to strategic (global) implementation of Lean Six Sigma. Also knowledgable in Best Manufacturing Practices, Quality, Supply Chain, Engineering, and EH&S. I am not a consultant and do not mind follow up questions.
Experience Bachelors of Science in Manufacturing Engineering from the University of Michigan. Lean Champion and Six Sigma Master Black Belt. Member of the American Society of Safety Engineers, Society of Manufacturing Engineers, and ISO audetation.
Director of Operational Excellence and Strategic Sourcing for multi-billion dollar corporation.
Question what are the factors causing the motor to get burn if it is connected to frequency inverter. The distance of the motor is about 50meters away from the frequency inverter. The motor is 6leads out, 460V, insulation F, Class B but it was already rewinded for 3 times. does this factor greaty contribute to motor windings burn out?
Answer The windings of a motor are wrapped closely and kept separated only by a thin layer of insulating lacquer
This lacquer can deteriorate by
a) age
b) weather changes
c) heat (due to current flow)
Generally the insulation lasts a lifetime but can lose its properties faster if
a) there is dirt and dust - especially where there are oily fumes like in kitchens
b) there are water droplets - such as in shower room exhaust fans
Thirdly a motor winding can burn out by overload (excess current)
a) if the rotation of the fan is mechanically blocked (some object preventing it from turning)
b) if the AC capacitor is defective - preventing rotation
c) if the bearings are seized (stuck)
