Induction motor vibrations in view of the API 541-4th edition

This paper discusses induction motor vibration, how API 541 views it, and what it means to the customer and manufacturer.Good motor performance depends on the electrical and mechanical design and the motor operating conditions. Sound mechanical design reduces the vibration levels and extends the life of the machine. To follow and understand the API 541 specification, this paper will discuss the following topics in detail: 1.) Overall motor construction as it relates to vibration 2.) Rotor construction: benefits and drawbacks 3.) Bearing Types: benefits, drawbacks and performance 4.) Motor vibration: what it means, magnitude, phase angle, and frequencies 5.) Factors affecting motor vibration