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Why Axis Of Motor Current?
Feb 17, 2017

Motor shafts---housings---loop currents in the base shaft currents.

Causes of shaft currents:

(1) magnetic field is asymmetric;

(2) supply current harmonics;

(3) bad manufacturing, installation, and as a result air gap eccentricity is not uniform;

(4) removable stator gap between two semicircular;

(5) number of stator core chip fan-folded unsuitable.


Hazards:

The motor bearings or ball on the surface erosion-shaped drive micro-porous, deterioration of the bearing performance of friction loss and heat increases, resulting in

Bearings burning.


Prevention:

(1) Elimination of fluctuating magnetic flux and power supply harmonics (such as retrofitting output side AC reactor in inverter);

(2) motor design, bearing housings and the base insulation, rolling bearing outer ring and end cap insulator.