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Section 1 Case 1: Motor Start Failure

Release time:

2024-11-28

A KIMAIR air compressor in a factory suddenly failed to start the motor during use. The operator tried to restart it several times, but the motor still did not work properly. To solve this problem, the maintenance team conducted a detailed troubleshooting. The maintenance staff checked the power supply line and confirmed that the power supply was normal, and the voltage and frequency were within the specified range. Then, they checked the wiring of the motor and found that the terminal was loose, resulting in poor contact. The maintenance staff re-tightened the terminal and performed an insulation test to ensure that the wiring was safe and reliable. However, the motor still could not start. The maintenance personnel further checked the windings of the motor and measured the resistance value of the windings with a multimeter. They found that the resistance value of one phase of the winding was abnormally high, indicating that the phase winding might be broken. To confirm this judgment, the maintenance personnel disassembled the motor and found that the winding was indeed broken. In response to this problem, the maintenance personnel decided to replace the damaged winding. They carefully measured the size and specifications of the winding, purchased suitable winding materials, and rewound it. After the winding was completed, the maintenance personnel conducted insulation tests and resistance measurements again to confirm that the winding had returned to normal. After reinstalling the motor, the maintenance personnel conducted a no-load test, and the motor started normally and ran smoothly. In order to ensure the long-term and stable operation of the motor, the maintenance personnel also recommended that the factory regularly perform maintenance on the motor, including checking the tightness of the terminal blocks and the insulation performance of the windings.

The maintenance staff checked the power supply line and confirmed that the power supply was normal, and the voltage and frequency were within the specified range. Then, they checked the wiring of the motor and found that the terminal was loose, resulting in poor contact. The maintenance staff re-tightened the terminal and performed an insulation test to ensure that the wiring was safe and reliable.

However, the motor still could not start. The maintenance personnel further checked the windings of the motor and measured the resistance value of the windings with a multimeter. They found that the resistance value of one phase of the winding was abnormally high, indicating that the phase winding might be broken. To confirm this judgment, the maintenance personnel disassembled the motor and found that the winding was indeed broken.

In response to this problem, the maintenance personnel decided to replace the damaged winding. They carefully measured the size and specifications of the winding, purchased suitable winding materials, and rewound it. After the winding was completed, the maintenance personnel conducted insulation tests and resistance measurements again to confirm that the winding had returned to normal.

After reinstalling the motor, the maintenance personnel conducted a no-load test, and the motor started normally and ran smoothly. In order to ensure the long-term and stable operation of the motor, the maintenance personnel also recommended that the factory regularly perform maintenance on the motor, including checking the tightness of the terminal blocks and the insulation performance of the windings.