Duct Fan Motor

Single-phase and three-phase electric motors built for continuous duty in inline air movement equipment and commercial exhaust assemblies.

This motor series powers inline duct fans, centrifugal exhaust units, and continuous air handling systems. Designed for tight enclosures with restricted airflow, it combines precision-balanced cast rotors, sealed deep-groove ball bearings, and automatic thermal overload cutouts. The design maintains stable speed and low operating temperatures under high static pressure resistance across extended duct networks.

S1 Continuous Duty Rating: Operates continuously at full rated load without thermal degradation or winding breakdown.

ISO G2.5 Dynamic Balance: Two-plane balanced rotors limit structure-borne vibration, keeping operational sound levels below 48 dB(A).

Automated Thermal Protection: Internal thermal cutouts automatically disconnect power if duct blockages cause internal temperature spikes.

IP55 Sealed Enclosure: Protects internal copper windings and laminations against moisture and dust accumulation inside ventilation channels.

Multi-Speed and EC Compatibility: Supports triac voltage regulation, multi-tap speed connections, or 0-10V signal control.

Inline Centrifugal Duct Fans: Drives backward-curved impellers operating against elevated pressure losses.

Commercial Kitchen Exhaust: Powers air extraction systems requiring continuous torque under warm, humid conditions.

Energy Recovery Ventilation: Supplies stable continuous airflow for air exchange units in commercial facilities.

Industrial Air Boosters: Maintains air velocity across extended duct runs in large indoor spaces.

Filtered Air Systems: Supplies steady static pressure required to draw air through multi-stage filter banks.

Shaft Modifications: Custom shaft diameters, step lengths, dual flat ends, and stainless steel material options.

Winding Adjustments: Customized wire gauges and stack lengths to match specific torque and RPM requirements.

Connection Assemblies: Customized lead wire lengths, terminal plugs, and sealed conduit boxes.

Mounting Interfaces: Custom belly-band brackets, vibration isolators, and mounting flange geometries.
 

We partner with original equipment manufacturers to deliver tailored motor assemblies:

Impeller Matching: Electrical and torque curve alignment based on specific fan blade profiles and airflow requirements.

Rapid Sampling: Functional prototype production within 12 working days for air-bench and acoustic validation.

In-House Validation: Load testing, insulation resistance testing, thermal rise measurement, and dynamic balance verification before shipment.

Production Consistency: Automated winding and 100 percent automated end-of-line testing for uniform performance across full production lots.

Vibration Resistance: Every rotor passes dynamic balancing checks to prevent frame resonance in light-sheet ductwork.

Material Selection: High-permeability silicon steel and 100 percent pure copper magnet wire reduce electrical losses and thermal buildup.

End-of-Line Verification: Every production unit undergoes automated testing for current draw, operational sound, and high-voltage dielectric insulation.

In-House Production: Stamping, die-casting, winding, and final assembly are managed under strict internal control systems.

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