This invention presents a wall-mounted speed regulator designed for a BLDC motor-driven ceiling fan. The regulator system consists of an AC-DC converter connected to an AC supply, which converts the alternating current (AC) to direct current (DC). This converted DC power is then regulated by a DC controller equipped with a speed control knob. The regulated DC power is transmitted via cables to a DC-AC converter housed within the BLDC motor. The DC-AC converter transforms the DC back into AC to drive the motor at the desired speed. The integration of these components ensures efficient power conversion and precise speed control of the ceiling fan.
Figure (1) It is a block diagram of the wall mounted speed regulator for a BLDC motor driven ceiling fan according to an embodiment of the invention. 1. The wall mounted speed regulator 2. a AC-DC converter 3. an AC supply 4. a DC controller or regulator 5. a speed controller knob 6. a DC-AC converter 7. a BLDC motor 8. cables 9. cables
- Single-phase AC induction motors (SPIMs) use either resistor-based regulators for speed which are outdated due to their inefficiency, or triac-based regulators, that suffer from low power factor and high current distortions.
BLDC motors, while more efficient, if remote controlled are expensive and add complexity and if they use wall mounted knobs, increases the cost and labour for installation due to the extra cabling required.
Thus there is a need for a more streamlined, cost-effective, and efficient solution for speed regulation in BLDC motor-driven ceiling fans.
- Integrated Speed Control with the AC-DC converter, simplifies the system by eliminating the need for additional cables between the speed controller and the speed control knob. This reduces installation complexity and cost.
- Stable Speed Regulation due to precise control by the DC voltage, which is independent of variations in the AC supply, ensures consistent fan speed and performance regardless of fluctuations in the power supply.
- Cost-Effective as it requires fewer cables and components compared to traditional systems making it an attractive solution for both new installations and retrofitting.
- A prototype of the speed regulator has been developed and tested with a BLDC motor rated at 21V, 300 rpm, and 100W. The tests have shown that the system can maintain the desired speed with high accuracy, as evidenced by achieving a motor speed of 280 rpm when set to 288 rpm.
- The invention achieves an excellent power factor close to 1, due to the near-phase alignment of input current and input voltage, and minimal harmonic distortion.
The invention achieves an excellent power factor close to 1, due to the near-phase alignment of input current and input voltage, and minimal harmonic distortion.
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- Energy Efficiency: Reduces electricity consumption and lowers carbon emissions, supporting sustainability goals.
- Cost Savings: Decreases energy bills and maintenance costs for consumers.
- Comfort and Productivity: Ensures stable fan speeds for improved living and working conditions.
- Retrofit-Friendly: Facilitates easy integration into existing installations, promoting widespread adoption.
The wall-mounted speed regulator for BLDC motor-driven ceiling fans finds application in residential, commercial, and industrial settings. It enhances energy efficiency, reduces operational costs, and improves comfort by providing precise control over fan speeds. Suitable for homes, offices, hotels, and manufacturing facilities, it supports sustainable building practices and contributes to a comfortable environment in public spaces such as airports and educational institutions. Its retrofit-friendly design facilitates easy integration into existing infrastructures, making it a versatile solution for optimizing energy use and enhancing overall environmental sustainability.
Geography of IP
Type of IP
542/MUM/2011
536090