How to perform infrared thermal imaging detection for the five types of working systems of the motor?
Pay attention to the infrared thermal imaging test of the motor:
1. The temperature rise under the rated load does not exceed the temperature rise limit, and the motor temperature exceeds the maximum allowable operating temperature only because the ambient temperature is too high. This phenomenon indicates that the motor itself is normal.
Solution: Use artificial methods to reduce the ambient temperature. If it is not possible, you must reduce the load.
Second, the temperature rise under the rated load exceeds the nameplate regulations. No matter what the situation is, the motor is faulty, and it must be stopped for inspection, especially when the temperature rise suddenly becomes larger. The reasons are:
(1) Electrical system failure
三相Motor control circuit three-phase unbalance
The thermal image visually presents the problem state.
➤ motor and cable connector heating
For such failures, tighten the cable gland screws after cleaning the cable gland surface.
(2) Mechanical system failure
➤ motor bearing thermal defect
The thermal image shows that the motor bearing has the highest temperature and there is a tendency of heat transfer from the surface of the motor end cover.
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