Thermal-stable rotor with enhanced cooling design for efficient electric motor applications

Area of Science:

• Electrical Engineering
• Mechanical Engineering
• Thermal Management

Background:

• Poultry farm ventilation fans require reliable, efficient, and thermally stable three-phase induction motors.
• Existing motors often face challenges with heat dissipation and vibration, impacting performance and longevity.

Purpose of the Study:

• To present an open-source redesign of a three-phase induction motor tailored for poultry farm ventilation applications.
• To improve thermal stability, reduce vibration, and increase the overall efficiency of the motor.

Main Methods:

• Modified motor geometry by increasing stator outer diameter and shortening axial core length.
• Utilized aluminum die-cast endcaps and a finned aluminum housing for enhanced heat transfer.
• Rewound motor with larger gauge wire to decrease phase resistance and copper loss.

Main Results:

• Reduced input power by 23% (788 W) under full load.
• Lowered the hottest coil temperature by up to 24°C (16.2%).
• Decreased rear-section vibration by up to 5.5 mm/s.

Conclusions:

• The open-source redesign offers a cost-effective and thermally robust solution for small induction motors.
• The design improvements lead to significant energy savings and reduced operational noise.
• Availability of complete design files under CERN-OHL-S v2 license facilitates replication and adaptation.