Causes of Wound-Rotor Motor Rotor Circuit Failures How to Solve Wound-Rotor Motor Rotor Circuit Failures

Fault phenomenon of rotor circuit of wound rotor motor

A wound rotor motor rotor circuit fault refers to an electrical fault in the motor rotor circuit, which usually causes the following phenomena:

The rotor may not rotate smoothly or stop: If there is a fault such as an open circuit or short circuit in the rotor circuit, the rotor may not rotate smoothly or stop completely. This is because the current in the rotor circuit cannot flow normally, causing the motor to not work properly.

Noise and vibration: An electrical fault in the rotor circuit may cause the motor to produce noise and vibration. This is because the fault will cause the motor to run erratically, thus producing noise and vibration.

Overheating and burning: If a rotor circuit fault occurs while the motor is running, it may cause the motor to overheat or burn. This is because the fault will cause the load on the motor to be unbalanced, resulting in excessive current and temperature, which will cause the motor to burn.

Degraded motor performance: Rotor circuit failure will affect the performance of the motor, such as reducing the motor's output power and efficiency.

Causes of Failure of Wound-Rotor Motor Rotor Circuit

The causes of wound rotor motor rotor circuit failure may be the following:

Insulation damage: During the operation of the motor, the insulation of the rotor circuit may be damaged due to mechanical shock, high temperature and other factors. Insulation damage may cause circuit breakage, short circuit and other faults.

Loose rotor joint: If the rotor circuit joint is not firmly tightened, it may cause poor contact and thus cause failure.

Motor aging: After the motor has been running for a long time, its coils, wiring and other components may age, leading to rotor circuit failure.

Humid environment: When the motor runs in a humid environment, it may cause corrosion of the motor circuit connectors and damage of the insulation materials, resulting in failure.

Overload or overvoltage: When the motor is running under overload or overvoltage conditions, it may cause excessive rotor circuit current and lead to failure.

Other reasons: For example, motor design defects, material quality problems, etc. may also cause motor rotor circuit failure.

How to deal with the rotor circuit failure of wound-rotor motor

The method for handling a wound rotor motor rotor circuit fault depends on the specific fault condition and motor type. In general, the treatment method includes the following steps:

Stop and check: If you suspect that the motor has a rotor circuit fault, you should stop the machine immediately and cut off the power supply to ensure safety. Then check and test the motor to determine the specific cause and scope of the fault.

Repair or Replacement: Based on the inspection results, repair or replace the damaged parts of the motor, such as replacing insulation materials, repairing or replacing joints, replacing damaged coils, etc. It should be noted that if the motor is severely damaged, the entire motor may need to be replaced.

Reassembly of the motor: After repair or replacement of motor parts, the motor should be reassembled and necessary tests and calibrations should be performed to ensure the safety and performance of the motor.

Preventive measures: In order to avoid the recurrence of motor rotor circuit failure, some preventive measures should be taken, such as: regular maintenance and inspection of the motor, avoiding motor overload or overvoltage operation, ensuring that the environment around the motor is dry and ventilated, etc.