Electric-Motor heating common 21 cause analysis
In the process of daily use, the causes of ELECTRIC MOTOR heating are many, many. We made the following conclusion:
1, Room temperature is too high;
2, The cooling(heat scatter) is bad;
3, Overload;
4, Over-voltage under-voltage or imbalance;
5, Frequent start-stop or frequent positive &negative;
6, Lack of phase;
7, The outlet fan is bad or into the wall;
8, Bearing oil shortage;
9, Mechanical jam blocked;
10, Moment of inertia of the load is too large, the startup time is too long;
11, Turn-to-turn short circuit;
12, New motor internal wiring is wrong;
13, Star delta;
14, Star triangle or the step-down start negative load start time is long or not normal transformation occurs due to a failure;
15, Electric motor be affected with damp;
16, Squirrel-cage asynchronous motor rotor fault;
17, Break or wound rotor asynchronous motor rotor winding resistance unbalance;
18, Sweep the rotor chamber;
19, Power harmonic is too big, (near a large rectifier equipment, high frequency equipment);
20, Repeatedly repair motor iron core flux decreased;
21, Some motor winding process.
osran