Heavy industrial machinery, such as mills, large compressors, heavy conveyors and crushers, demands continuous high torque and long running hours. Driving this equipment, high-kW electric motors stand out for the mechanical strength that keeps them stable under load.

Mechanical Strength in a High-kW Motor

In large-power motors, the shaft, bearings and frame are sized for the heat and vibration that build up under continuous load. A cast iron frame damps the impact and vibration of heavy-industry conditions far better than aluminium, which is why it is the standard choice for high-kW applications.

Torque, Speed and Starting Load

High-inertia loads like crushers and mills demand high torque at start-up. A 6-pole 1000 rpm motor delivers high torque at low speed, while a 4-pole 1500 rpm motor offers a balanced torque-speed profile. The starting character of the load is the basis for motor and control selection.

Thermal Management Under Continuous Duty

In high-kW motors running in S1 continuous duty, Class F insulation and IP55 protection are critical to long winding life. Adequate cooling and the right efficiency class reduce the heat the motor produces and shorten downtime.

Choosing the Right Motor for Heavy Industry

DRG Motor builds high-power electric motors up to 355 kW for heavy industry in the IE3 and IE4 efficiency classes. We select power, speed and frame together based on your machine's torque curve, moment of inertia and duty cycle.