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PubTime:2008/8/28 14:05:39
Hits:6926次 |
Motor housings axis --- --- base in the loop current known as the current axis.
Current axis of the reasons:
(1) asymmetrical magnetic field;
(2) supply current in the harmonic;
(3) manufacturing, installation bad, because the rotor eccentric gap caused by uneven;
(4) removable stator core gap between the two semicircle;
(5) fan Diecheng the stator core of the fight inappropriate choice of the number of tablets.
Hazard:
So that the electrical surface or ball bearings by the erosion of porous-way point, bearing deterioration of operating performance, friction loss and fever increased, eventually causing bearings burned.
Prevention:
(1) Elimination of harmonic pulse of flux and power (such as the output side of the installation of AC converter reactor);
(2) the electrical design, will the sliding bearing housings and base insulation, the outer ring and rolling bearing cover insulation.
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