Electric motors are almost always well-balanced when they leave the motor manufacturer. Motor has 2 speeds hooked up and is very noisy on high speed. If a motor problem does occur, the source of the problem needs to be promptly identified and corrected. With proper knowledge of the sources of motor vibration, proper vibration measurement and diagnostic procedures, it is possible to more quickly identify the root cause of motor vibration. In our electric motor, vibration can occur as a force applied in a radial direction (outward from the shaft) or in an axial direction (parallel to the shaft).

3.) Immediately disappears Unbalanced line voltages 120Hz Steady 120Hz & possible beat Immediately disappears Electrical noise vibration (RPM x # of rotor slots) / 60 +/- 120, 240 etc. Nov 14, 2016 Monitor electric motor vibration, or optimize bearing lubrication?

Do not over-react. The bearing is bad and I had to replace it. MANATEE software offers several tools to quikly identify the root cause of acoustic noise and vibrations in terms of nature (forced or resonant mode) and physical origin (e.g.

Vibration, belt tension and misalignment are among the major causes of motor failures that started as bearing failures. Fourth and final, it can cause brush sparking at commutators or current collector rings.

This article examines the causes of electrical machine vibration, the effects of vibration, and means taken to mitigate vibration. Any or all of these defects will appear on the spectrum analyzer as a high amplitude peak at 2 X line frequency with the absence of side bands around the 7,200 cycles per minute (cpm) frequency. Where vibration is a problem, electrical connections, if not tight and secure, will be an endless cause of trouble. Though the system keeps the motor running, the occasional spark occurs between brushes and commutator at the timing of the commutation. By Heinz P. Bloch, P.E. Excessive vibration can cause damage to the machine or reduce its lifetime, as well as damage to other […] Live with it or buy a new motor. A vertical engine that drives a pulper via belts, such as shown in Figure 4, with 600 kW of power and 1000 rpm, after the assembly and general improvement, It showed high levels of vibration voted, As shown in Table I below presents. As a result of these problems, whenever vibration is located in an electric motor, its source should be located quickly and corrected. Electric motor motor noise diagnosis: this article describes the causes, diagnosis, cure & prevention of noises traced to the electric motor component of an oil burner, air conditioner, or other electric-motor driven equipment. Electric motors are almost always well-balanced when they leave the motor manufacturer. Amplitude pulsates at slip RPM x # of poles 4.) An electric motor’s rotor, like any rotating mass, cannot become out […] The spark is one of the causes of electrical noise. Causes of Electric Motor Vibration. Electric Motor failure occurs due to overheating, phase unbalance, voltage unbalance, single-phasing, surge voltages, poor ventilation, lack of lubrication, overloads, over cycling, excessive moisture, improper belt tension, misalignment and vibration, loose connections, pests, etc.

Third, the excessive movement it causes can result in lead wires becoming brittle. And for many people, the answer for the odd buzzing is “Pallesthesia.”