Permanent Magnet Motor Direct Drive Large Fan
風速均勻柔和
覆蓋面積大
Maintain high efficiency in the full speed load range, save energy and electricity
Increase MTBF（Mean Time Between Failures) index
The blades are directly driven by high torque output at low speed; not involving gears; no friction and no mechanical clearance
Low noise
Easy to install and maintain
High torque, high rigidity, steady at low speed
Product Introduction
HVLS (High Volume–Low Speed) energy-saving fan is a large ceiling fan with 7.3 meters diameter which produces great airflow and ventilation with running speed of 50rpm only. It is the most powerful device which produces great airflow field in the environment nowadays.
We have applied the theory of Aerodynamics when designing the streamline fan blades. It needs only 1.5KW or even lower power to run the drive, which produces large areas of natural wind system to meet the dual function of ventilation and cooling effect. It has great application advantages than the traditional air-conditioner or small high-speed fan. It could be a perfect solution to the ventilation and cooling effect for large areas.
The overall design has been undergo precise calculation, provides the best effect of ventilation on human somatosensory. The effect covers large areas with uniform and soft wind. In actual application, it reduces 5-8℃ as the ventilation effect on human somatosensory. The maximum running power of each Large Fan is 1.5KW only, and the maximum daily running cost required is only $36 for running 8 hours daily (calculated according to the industrial electricity cost $3/KWh). Our aesthetic, durable and maintenance-free products provide dual function of ventilation and cooling effect for you.
Product Applications
The Existing Problems of Driving Fan with Induction Motor and Gearbox
The gearbox has low efficiency, high energy consumption and high noise.
When the internal pressure of the gearbox increased, it will cause oil leakage.
It will cause power loss after slowing down (reduce overall effectiveness).
Regular maintenance is required due to mechanical wear.
It is bulky and complicated to install.
The Difference between Permanent-magnetic Direct-drive Motor and Inverter Gearbox
Direct-drive motor is a special permanent-magnetic motor, usually called Permanent-magnet Synchronous Motor or DC Brushless Motor. It does not require to connect to the drive load (e.g. gearbox, pulley and chain etc.), the blades are connected directly to the rotating body of the motor. This combination is called a “Direct-drive Fan”.
The permanent-magnetic direct-drive motor is designed with compact construction, using fat-and-short style of core stack, produces high torque output at low speed rotation. Comparatively, the induction motor produces low torque at high speed rotation, therefore it must through a gearbox to amplify the torque, and the conversion efficiency is low.
When the direct-drive motor is running at the rated speed, it can produce high torque at zero speed status or stalled state, which traditional induction motor cannot perform. Therefore, the main feature of the direct-drive motor is the torque, but not the power. When the three-phase load is balanced, the direct-drive motor can provide stable torque output at full rate.
