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No. 3488 Rama 9 Rd.,
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Big Fan AC Motor

Rugged, Reliable, Honest

Big Fan Series: BAC
The most practical option for cooling large areas
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Customer Load Center (CLC) Speed Controller AC Motor Gear Reducer

Danfoss Frequency Inverter

The easy-to-use and robust motor controls improve the reliability and efficiency of all AC motor types, including induction and permanent magnet and synchronous reluctance motors.

Nord German Drive Systems

Getriebebau NORD is one of the world’s leading manufacturers of drive technology – for mechanical and electronic solutions. The range of products includes geared motors, motors, industrial gear units, and many more.
Comparison AC vs BLDC Motors

A Technological Marvel in Fan Assembly Design

The precision-milled fan hub and fan strut pieces ensure a flawlessly fitted connection that prevents excessive fan blade movement. A uniquely designed concave-convex joint between the fan hub and fan strut also boosts security while a vibration dampening material is used to eliminate stress on the fan hub. The result is a very strong and heavy duty blade-to-hub connection that makes the fan blade impossible to depart from the fan assembly.
Fan Strut Fan Hub Fan Blade Bolt & Nut Concave/Convex Joint Vibration Dampening Bushing

Unique Hub Design

Cánh quạt được thiết kế xoắn, nghiêng và vót nhỏ dần để bù trừ sự khác biệt lưu lượng dòng khí tác động lên phần đầu và cuối cánh. Như vậy, cánh quạt sẽ tạo ra một luồng không khí đồng đều dọc theo chiều dài của cánh. (Tham khảo thêm biểu đồ)

Trong khi loại cánh đúc thông thường, cánh quạt bằng nhau từ đầu đến cuối, sẽ làm vùng không khí ở giữa bên dưới của quạt có lưu lượng gió thấp hơn. Điều này sẽ tạo ra hiệu ứng lỗ hổng không khí phía dưới cánh quạt.
Thiết kế cánh quạt có bề mặt uốn cong, nghiêng và vạt nhỏ dần
Compensates for the substantial velocity differences that stretch from one end of the blade to the other. As a result, air flow is even throughout the entire area covered.
Thiết kế cánh quạt đều nhau
When blade contour is uniform along the length of the blade as in the case of aluminum extrusion design, an area directly below the fan has no airflow being felt.

Fan Safety Features

Fan Stabilization Cables
4 Guy wires are installed to keep the fan stable without excessive oscillation during operation.
Anti-Drop Steel Cable
In the unlikely event that the fan blade is dislodged, it will be secured to the fan assembly by this Anti-drop steel cable.
Safety Loop-Over Wires
2 thick multi-strand steel wire is used to loop the entire fan over the roofing structure to prevent it from being dislodged.

AC Motor Fan Series BAC

Specification & Performance

Fan Diameter 7.3m & 3.1m

Model
BAC - 7.3
BAC - 3.1
BAC - 3.1
7.3 m
3.1 m
Blade Type
2 ply alu 5052, 1.5 mm thick
2 ply alu 5052, 2.5 mm thick
Maximum Speed
100 rpm
45 rpm
Air Flow
780,000 m³/h
203,800 m³/h
Air Covered Area
1,400 m²
280 m²
Noise Level
40 dB (A)
35 dB (A)
Drive & Motor System
Nord of Germany
Nord of Germany
Frequency Inverter
Danfoss
HNT
Power Supply
50 Hz, 3Phase, 380 V
50 Hz, 3Phase, 380 V
Total Weight
135 kg
38 kg
7.3m Fan Zone Performance
Zone
Avg. Velocity
∆TPTD
A
3.0 - 3.5 m/s
4 - 5 °C
B
2.0 - 2.5 m/s
3 - 4 °C
C
0.5 - 1.0 m/s
2 - 3 °C
∆TPTD = Perceived Temperature Drop @ 8m Fan Height
A B C 14 m 28 m 40 m
3.1m Fan Zone Performance
Zone
Avg. Velocity
∆TPTD
A
2.0 - 2.5 m/s
3 - 4 °C
B
1.0 - 2.0 m/s
3 - 3.5 °C
C
0.5 - 1.0 m/s
2 - 3 °C
∆TPTD = Perceived Temperature Drop @ 6m Fan Height
A B C 7 m 12 m 18 m

Make It Your Own

Color your blades to match your environment. Our unique blades can be painted to provide you with an aesthetically pleasing fan unit.
Pick Your Color

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Feel free to drop us any questions you have, or schedule a visit to see the Big Fan in person!

Come for Demo

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