|Model||Rated Power||Bus Voltage||Blade Size||Max RPM||Diameter||Weight|
Ceiling fans can provide decorative decoration for any space, suitable for living rooms, bedrooms, dining rooms, kitchens, garages, farmhouses, pavilions, low-key rooms, and can even be installed outdoors in humid places. In addition, ceiling fans with DC Motors are popular for their many favourable features including their energy efficient motor and quiet performance.
Brushless DC motors provide more options, such as low fan speed, energy saving, not disturbing neighbors during long nights outdoors, effectively moving air and reversing, efficiently changing air flow.
(1)【POWERFUL】 Powered by Brushless DC Motors (BLDC), the ceiling fan can generate superior air movement and energy efficiency compared to traditional fan motors.
(2)【ENERGY EFFICIENT BLDC TECHNOLOGY】 An energy-efficient brushless DC motor allows the fan to deliver superior efficient air delivery with high RPM while consuming only low power. No unnecessary heating of the motor. Brushless DC Motor ceiling fans consume only a few watts, keeping your energy bill low. They are designed for energy efficiency and consume 65% less power consumption than ordinary fans.
(3)【SILENT STRONG BLDC MOTOR】
Traditional fan always adopt AC universal motors, which makes more noise. Powerful BLDC motors are tuned to produce an inaudible frequency. The noiseless motor allows the ceiling fan to be suitable for most room types such as kitchen, living room, bedroom, dining room. Which brings comfortable sleeping, creating a quiet living environment, consistent strong power supply.
(4)【REVERSIBLE】Equipped with a CW/CCW optional motor, the ceiling fan is easily reversible between Clockwise (Summer Mode) and Counterclockwise (Winter Mode), making it energy-efficient and cost-effective all year round! In addition, for the better efficiency of brushless DC motors, fans can also provide more precise control. Precisely adjustable speed settings allow you to adjust the airflow according to your needs.
Why BLDC for ceiling fan?
Today the typical ceiling fan is based on AC motors which are power hungry. Along with this the typical AC motor based fans have the rpm control through the capacitor or resistor based regulators and is not efficient as there is loss in the regulator itself to some extent. In addition the RPM control is by controlling the voltage and the voltage fluctuations of the mains make it very challenging to have constant RPM based on the AC mains supply. Further, existing AC motor solution, results in power factor (PF) degradation with no improvement for PF and there are other ill effects like harmonics injection to the AC mains, etc.
The total amount of air flow or displacement is based on the blade size & rpm and does not change due to any other factor. The proposed solution is to keep the same air flow or displacement with less of energy usage along with improving the PF using the BLDC motor based ceiling fans.
Typical BLDC motor based ceiling fan has much better efficiency and excellent constant RPM control as it operates out of fixed DC voltage. The proposed BLDC motor and the control electronics operates out of 24V DC through an SMPS having input AC which can vary from 90V to 270V. A comparison between BLDC and conventional ceiling fans is shown below (42” ceiling fan is considered).
The power consumption is less than half at full speed and is about 20% at low speed for the BLDC motor compared to the conventional motor based ceiling fan, as can be seen from the graph above. The Power Supply (PS) used is at 85% efficiency and the electronics consumes less than 0.5W. The power curves for the BLDC ceiling fan considers the total power consumed from the wall socket.
The mechanical energy required to rotate at full speed (typically 360rpm) for a 42” conventional ceiling fan is about 0.65Newton Meter. The equivalent electrical energy, as per the below equation, would be around 26Watts, considering about 95% efficiency for mechanical to electrical energy conversion. The total power consumption of 32 watts as seen in the above design seems to be with in the design boundaries for such a motor.