With the rapid development of modern science and technology, permanent magnet synchronous motors quickly occupy the market with their own advantages, completely surpassing traditional motors, and are used in HVLS fans, named HVLS PMSM FANS. So, what are the advantages of permanent magnet synchronous motor fans?


  • PMSM itself has high power, high efficiency, and higher torque. Compared with traditional motor fans, any speed point can save power, especially at low speed;
  • PMSM has low heat generation, so the motor has a simple structure in its cooling system;
    Small size and low noise, HVLS PMSM FANS is suitable for installation in the space with lower ceilings;
  • PMSM has no transmission gear wear, no lubrication, thus no maintenance need;
    PMSM allows large overload current, and the reliability is significantly improved.
what is pmsm fan 01

What is PMSM Fan?

Synchronous motor
PMSM is a permanent magnet synchronous motor. What is called a permanent magnet, refers to adding permanent magnets when manufacturing the rotor of the motor in order to improve the performance of the motor. The synchronous means that the rotation speed of the rotor is always consistent with the electric current frequency of the stator winding.
Permanent magnet motors have a higher power-to-weight ratio, smaller size, lighter weight, and larger output torque than other types of motors, and the motor’s limit speed and braking performance are also excellent, so it is the most used motor in electric products at present.



Applicable for Large Space & Tall Industrial Area 18ft, 20ft, 24ft Diameter PMSM Fans.

Model Fan Dia.
Motor Power
RPM Air Flow
Applicable Area
RTF-DF-7E 7.3m/24ft 1.2 20~53 13,800 2.5/4.3 1,800 115 39
RTF-DF-6E 6.1m/20ft 0.85 20~58 12,000 1.4/2.4 1,380 105 39
RTF-DF-5E 5.5m/18ft 0.65 20~63 11,000 1.6/2.7 1,050 100 39
Model RTF-DF-6E
Fan Dia.(M/FT) 6.1m/20ft
Motor Power(KW/HP) 0.85
RPM 20~58
Air Flow 12,000
Current(A)380V/220V 1.4/2.4
Applicable Area 1,050
Weight(KG) 105
Noise(DB) 39

Get Quotation Now!​​​

Whether you are looking for an on-site survey, have questions about our products, are interested in becoming a partner, or just want to chat, we look forward to speaking with you.

Wind Chill Effect

The breeze brought by the HVLS fans blows towards the human body from a tridimensional direction, accelerating the evaporation of sweat, making people feel cool. Usually, the temperature caused by the wind chill effect can reach 5-7°C. In addition, compared with traditional powerful fans, the breeze from all directions will make people more comfortable.

Feature of RTFANS PMSM HVLS Ceiling Fans

  • Wide coverage with power saving, fan diameter up to 7.3m, the maximum coverage area of each fan is more than 1000 square meters with the maximum power of 1.5KW;​
  • Tridimensional wind, 360-degree air circulation, ventilation without blind spots, ventilation, and cooling as well as dehumidification;​
  • The airfoil blades developed by scientific design and advanced aerodynamic technology and principles enable greater air volume and higher efficiency, such as the shape, Full, and Separate Connect Reinforce Rib​
  • Easy installation, elegant appearance, HVLS Fans can be installed in any BIG SPACE which is higher than 4.0 meters, not just a fan, but beautiful scenery.​
  • Innovative technology, low speed, less wear, maintenance-free, and long life.​

Space Ventilation

How to position Industrial HVLS Fans 5

Ventilation is usually restricted in a tall and big space, and the exhaust fans can hardly work for the floors or corners of buildings where personnel and equipment are located. While HVLS fans can completely solve the problem by sending out a well-aligned wind in full space, and cooperate with roof ventilators, improve air quality, and realize a healthy and comfortable working environment.

Safe and Secure

RTFANS pmsm ceiling fans pic 1
  • Anti-Skip Design: Unique skip resistance design, thicker steel sheet, and safety;
  • Cardan Joint Design ensure the fan is softly connected with the roof structure and installed at a balanced level;
  • Safer structure with Mortise and Tenon Joint design;
  • Double Chassis, more durable and steady, imported aeronautic aluminum alloy (AA7075), forged by 1000T machine with 570Mpa extension strength, T6 heat processing;
  • Anti-Drop Structure Design;
  • Steel Cable traction, steel cable from different directions to pull the motor to prevent waggling and keep balance, each cable can sustain 1000kg stress;
  • German DIN933 Industrial Bolt and DIN125A locknut with high strength 8.8 grade, the practical stress it could endure is 10 times than normal;
  • German “Nord” customized coaxial bevel reduction gears with a diameter of axle 40mm;
  • German “Simit” double oil seal design, durable and reliable. “Shell” top class “Omala” S4 lubrication oil, zero maintenance for over 20000 hours. IE3 high-efficiency motor with imported “SKF-VL” bearing, save energy by 5-10% than IE1 and IE2;
  • Denmark “DANFOSS” frequency converter & German “Schneider” electrical sets, step-less speed regulation with malfunction protection, IP55 protection level, and NEMA1 standard controlling box, operation temperature range -10 ~ 55 ℃;
  • All RTFANS products are covered by Pacific Insurance Agency with a total amount of up to 1.5M in USD on product liability.

Required Structural Clearances

RTFANS industrial ceiling fans pic 2

Application Solutions

Big Ceiling Fan for barns
Big Ceiling Fans for Cattle Horse Barns
Evaporative Cooling Pad 7090
Honeycomb Cooling Pad 7090
Commercial Ceiling Fans for Room
Air Coolers Featurers
Industrial Evaporative Air Cooler RTF-20 series
Best Rated Evaporative Air Cooler 4
Best-rated Evaporative Air Cooler RTF-25BL
Portable Air Cooler ka-36
Portable Air Cooler KA-36


We aim to be a world-leading solution supplier specialized in large space ventilation and cooling.

Join us to develop more and help our earth to be greener.