1. Insulation damage
Phenomenon: The insulation material of the motor winding will gradually age and damage under high temperature.
Consequences:
Short circuit or ground fault: Insulation damage may cause a short circuit between windings or grounding between windings and the casing, causing electrical faults.
Motor burnout: In severe cases, the winding may burn out, requiring the replacement of the winding or the entire motor, increasing maintenance costs and downtime.
2. Brush and commutator damage
Phenomenon: The brushes and commutator of the DC motor will wear faster at high temperatures, and the surface temperature will increase.
Consequences:
Increased brush wear: Increased brush wear may require frequent brush replacement, increasing maintenance costs.
Commutator damage: The increased surface temperature of the commutator may cause sparks, further damage the commutator, resulting in poor commutation and affecting the operating performance of the motor.
3. Bearing damage
Phenomenon: High temperature may cause the bearing grease to deteriorate or dry up, and the bearing temperature to increase.
Consequences:
Increased bearing wear: Poor lubrication will lead to increased bearing wear, increased bearing noise and vibration.
Bearing jam: In severe cases, it may cause bearing jam, damage the bearing or even the motor shaft, and the bearing or the entire motor needs to be replaced.
4. Damage to mechanical parts
Phenomenon: Overheating may cause the mechanical parts of the motor (such as couplings, gears, etc.) to withstand excessive temperatures.
Consequences:
Deformation or damage of parts: High temperature may cause deformation or damage of mechanical parts, affecting the normal operation of the equipment.
System instability: Damage to mechanical parts may cause instability of the entire rolling system, affecting production efficiency and product quality.
5. Abnormal control system
Phenomenon: Overheating may cause abnormal operation of electronic components in the control system (such as frequency converters, control cabinets, etc.).
Consequences:
Decrease in control accuracy: The control system may not be able to accurately control the speed and torque of the motor, resulting in decreased control accuracy of the rolling process.
Malfunction of protective devices: Overheating may cause malfunction of protective devices in the control system, further affecting the normal operation of the equipment.
6. Energy waste
Phenomenon: When overheated, the efficiency of the motor decreases and more electricity is consumed.
Consequences:
Increase in energy consumption: Overheating will increase the energy consumption of the motor and increase production costs.
Reduced efficiency: The efficiency of the motor decreases, affecting the production efficiency of the entire rolling production line.
7. Safety hazards
Phenomenon: When overheating, the motor's operating state is abnormal, which may cause sparks or overheating.
Consequences:
Fire risk: Overheating or sparks may cause fires, posing a serious threat to the safety of personnel and equipment.
Personnel injury: Overheating may cause equipment failure and increase the risk of operator injury.
