Permanent Magnet HVLS Fan Energy Saving Large Diameter Industrial
The permanent magnet synchronous HVLS (High Volume, Low Speed) industrial ceiling fan is a direct-drive air circulation system engineered for large spaces up to 1,500 m². Unlike conventional geared fans, the permanent magnet synchronous motor eliminates the gearbox entirely — no oil changes, no gear or bearing wear, and zero routine maintenance. The motor delivers an immense 300 N·m of torque, driving five or six large aluminum-magnesium alloy blades to produce massive, gentle airflow while consuming as little as 400 W. Advanced rare-earth magnets are engineered to remain non-demagnetized over the entire service life, ensuring performance does not degrade with age. Safety is integral: four steel wire ropes (each rated to 1,000 kg) secure the motor to the ceiling, L-shaped blade link plates prevent individual blade detachment, and the VFD controller automatically alarms and stops operation in the event of impact or electrical fault. All load-bearing components are forged from 40CR alloy steel, heat-treated and precision-machined for structural reliability. Three series — C, E, and S — cover diameters from 2.1 m to 7.3 m, airflows from 4,600 to 15,380 m³/h, and mounting heights from 4 m to over 10 m. For factories, warehouses, and commercial venues, this fan delivers permanent-magnet efficiency with uncompromising safety.
Conventional HVLS fans use a geared reduction unit between the motor and the blades. Gear oil must be changed, bearings wear, and belt or gear failures cause downtime and costly repairs. Over time, efficiency drops, noise increases, and the risk of mechanical failure grows. Safety concerns — blade detachment, motor housing separation, or structural failure — remain a constant worry, particularly in occupied spaces. Facilities need a fan that eliminates these failure points entirely.
The permanent magnet synchronous motor drives the fan blades directly, with no gearbox, no belts, and no high-speed bearings to maintain. The rare-earth rotor provides extremely high torque at low speed, maintaining stable, quiet airflow with an unlimited service life under normal operating temperatures. The motor's high-performance heat dissipation system keeps winding temperatures low, protecting the magnets from demagnetization. Safety is engineered into every connection: 12.9-grade high-strength bolts, a bearing protection system that prevents rotor detachment, four 1,000 kg-rated steel cables, and L-shaped blade link plates that stabilize the blades. The integrated VFD controller provides soft start, overload protection, and emergency stop. The result is a fan that is truly maintenance-free and safe to operate in occupied industrial spaces.
| Series | Model | Motor Power (W) | Voltage (V) | Fan Diameter (m) | Blades/Set | Speed (rpm) | Current (A) | Airflow (m³/h) | Net Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|
| C | C210 | 400 | 220/380 | 2.1 | 5 | 190 | 2.5 | 4,600 | 37 |
| C | C270 | 550 | 220/380 | 2.7 | 5 | 125 | 2.0 | 5,700 | 38 |
| C | C330 | 550 | 220/380 | 3.3 | 5 | 105 | 2.0 | 6,200 | 40 |
| C | C400 | 750 | 220/380 | 4.0 | 5 | 95 | 2.5 | 7,800 | 54 |
| C | C460 | 750 | 220/380 | 4.6 | 5 | 80 | 2.5 | 8,500 | 56 |
| E | E540 | 750 | 220/380 | 5.4 | 5 | 70 | 2.5 | 10,500 | 66 |
| E | E660 | 1100 | 220/380 | 6.6 | 5 | 60 | 3.0 | 12,900 | 86 |
| E | E720 | 1100 | 220/380 | 7.3 | 5 | 55 | 3.0 | 14,200 | 89 |
| S | S540 | 1100 | 220/380 | 5.4 | 5 | 75 | 3.0 | 11,540 | 91 |
| S | S600 | 1100 | 220/380 | 6.0 | 5 | 65 | 3.0 | 12,800 | 94 |
| S | S660 | 1500 | 220/380 | 6.6 | 6 | 60 | 3.6 | 13,500 | 116 |
| S | S730 | 1500 | 220/380 | 7.3 | 6 | 55 | 3.6 | 15,380 | 120 |
*All models: permanent magnet synchronous direct-drive motor, aluminum-magnesium alloy blades with oxidation + baked paint finish (0-level adhesion), VFD controller with protection system, four 1,000 kg steel safety cables, 12.9-grade high-strength bolts, 40CR alloy steel mounting hardware.*
- Large industrial workshops and assembly plants.
- Warehouses, distribution centers, and logistics hubs.
- Commercial spaces: gymnasiums, exhibition halls, retail stores, airports.
- Agricultural buildings: dairy barns, equestrian arenas, poultry houses (non-corrosive environments).
- Any high-ceiling space from 4 m to over 10 m requiring quiet, low-cost air circulation.
The permanent magnet synchronous motor rotates the large-diameter blades at low speed, producing a massive column of air that descends and flows horizontally across the floor. This continuous airflow accelerates sweat evaporation, producing a perceived cooling effect of 2–3°C without air conditioning. The direct-drive design eliminates the gearbox entirely, so no mechanical energy is lost and no maintenance is required. The VFD controller manages soft starting and speed adjustment, while the safety system continuously monitors for imbalance or impact, cutting power instantly if an abnormality is detected.
- Measure the floor area to be cooled. Each fan covers a circular area determined by its diameter.
- Confirm ceiling height. Choose a model whose mounting height range matches your building.
- Select the series: C series for spaces up to 8,500 m³/h airflow, E series for larger volume with 5 blades, S series for maximum airflow and 6-blade stability.
- For multiple fans, space them so their airflow circles slightly overlap for uniform coverage.
*Contact our engineers with your floor plan and ceiling height for a free layout design and quotation within 24 hours.*
No. The direct-drive design eliminates gear oil, belts, and high-speed bearings. There is no need for lubrication, oil changes, or component replacement. The motor is designed to last the life of the fan.
Yes. The motor is equipped with a high-performance cooling system that keeps winding and magnet temperatures well within safe limits. The magnets retain their strength indefinitely under normal operating conditions.
Four steel wire ropes, each with a tensile strength of 1,000 kg, connect the motor housing to the ceiling structure. These act as redundant safety cables that would hold the fan in place even if all other connections failed.
Each blade is mounted with L-shaped link plates that connect adjacent blades, maintaining balance and preventing any single blade from detaching. The blade-to-hub connection uses 12.9-grade high-strength bolts.
Yes. For reinforced concrete beams, an L-shaped bracket is fixed to both sides of the beam with expansion bolts, and a top plate connects the brackets. The fan's extension rod or top cap then attaches to the top plate. 40CR alloy steel forged components ensure structural integrity.
The permanent magnet synchronous motor delivers higher torque at lower power consumption. The C210 model moves 4,600 m³/h using only 400 W, and the largest S730 moves 15,380 m³/h using 1,500 W. Over a year of continuous operation, this translates to significant electricity savings.
The aluminum-magnesium alloy blades are treated with an anti-corrosion oxidation and baked paint finish. However, the fan is not designed for explosive dusts or highly corrosive chemical atmospheres. For such conditions, contact us for a custom stainless steel or coated version.
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