High-voltage motors refer to electric motors with a rated voltage above 1000 V. Commonly used voltages are 6000 V and 10,000 V. Advantages of high-voltage motors include high power output and strong resistance to impact loads; disadvantages include large inertia, making starting and braking difficult. High-voltage motors can drive various types of machinery, such as compressors, pumps, crushers, machine tools, transport equipment, and other apparatuses, serving as prime movers in industries including mining, mechanical engineering, petrochemicals, and power generation. For applications driving blowers, coal-grinding mills, rolling mills, or hoists, the intended use and technical requirements must be specified at the time of ordering so that special designs can be adopted to ensure reliable operation.
High-voltage motor maintenanceThe two most critical points must be observed.
During normal operation, the motor should emit a uniform, relatively light “hum” without abnormal noises or unusual sounds. Excessively loud noise—including electromagnetic noise, bearing noise, ventilation noise, and mechanical friction noise—may indicate early signs of failure or an existing fault.
Touching certain parts of the motor to assess temperature can also help identify fault causes. For safety, use the back of your hand to lightly touch the motor housing and areas around the bearings; if abnormal temperatures are detected, address them promptly.
High-voltage motor maintenance requires checking whether the motor’s ventilation system and bearing lubrication are normal, verifying the reliability of the motor’s grounding system, and inspecting the brush assembly and lifting mechanism for smooth operation and correct positioning of the brush-lifting handle.
PREVIOUS：DC motor repair – major overhaul of stator and rotor with rewinding – dynamic balancing testNEXT：On-site motor repair service: on-site dynamic balancing of fans
