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A fan motor must be able to accelerate the fan wheel, drive, and shaft to operational speed in addition to running the fan at the specified operating parameters.
A properly designed and adjusted motor protection system may be able to stop the fan before the windings overheat and the insulation is damaged for a fan transporting a large volume of air at low static pressure when the motor power required during continuous operation is insufficient to accelerate the fan.
The massive axial fans are driven by the high inertia motors. Large axial fans are high inertia loads, increasing the length of time it takes for a motor to start.
The high inertia motor has stall times that are longer than their start timings because it is specifically made to withstand the greater temperature rise during start and stall conditions.
The greater resistivity copper alloys used in the high inertia motors’ improved rotor bar designs are among the suitable materials.
The general design has been adjusted to achieve balance between torque and temperature performance, and the motors have been re-dimensioned to allow the temperature rise associated with high inertia starts.
The Global High Inertia Fan Motor market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
ABB’s new high inertia motors are ideal for driving large fans because they have stall times that are longer than their start times, moderate levels of inrush current, and a choice of cooling systems.
They are based on ABB’s tried-and-true modular induction motor platform, which ensures their reliability. A load with a lot of inertia resists acceleration well.
The high inertia in a fan application can be caused by a heavy blade or a large surface area that represents a lot of air friction.
For axial fan applications, all high inertia motors from ABB feature stall times that are longer than their start times under typical operating conditions, allowing for the secure arrangement of relay safety protection.
The service factor (SF) is 1.15 and the applied inertia level is three times that of the published NEMA MG-1 chart with a class F temperature rise.
