Common causes analysis and preventive measures for compressor coil burnout
1、 Analysis of the causes of compressor coil burnout
- Motor malfunction:
(1) The motor winding has open circuit, short circuit or grounding phenomenon, and the internal insulation of the motor is damaged;
(2) The bearings of the electric motor are severely worn, and the rotor is swept or stuck;
(3) The loose fit between the shaft and end cover of the motor causes shaft movement, resulting in motor vibration and heating;
(4) The motor fan does not rotate or the speed is too low, causing the motor to overheat;
(5) The lead wire of the stator winding is too long, too thin, or connected incorrectly;
(6) The head and tail ends of the stator winding are not securely fixed;
(7) Low power supply voltage and other factors can cause the motor to overheat and burn out the motor coil.
- Compressor resistance fault:
(1) Blockages in the oil circuit can cause a decrease in oil pressure or even fuel interruption (such as stuck fuel injectors);
(2) Air leakage after oil pump wear (piston ring blocked by foreign objects);
(3) The air valve plate is damaged and leaks air;
(4) Excessive carbon accumulation in the intake and exhaust valves leads to lax closure;
(5) The refrigerant pressure is too high and exceeds the specified value;
(6) Refrigerant leakage;
- Refrigeration system malfunction: Dirty and icy blockage in the refrigeration system is a fatal injury to compressor refrigeration!
- Electrical control system malfunction: Electrical control system malfunction can also cause insufficient cooling capacity of the compression mechanism, leading to the burning of the compressor coil!
2、 Preventive measures
- During installation, the connection between the motor and the electrical control box must be reliable and the bolts must be tightened without looseness to prevent accidents caused by loose wiring screws caused by vibration.
- During operation, it is necessary to regularly check whether the power supply voltage is normal, whether the current is stable, and whether there is any occurrence of phase or iron deficiency. If any abnormal situations are found, they should be dealt with in a timely manner to avoid affecting normal production and operation.
