WIND TURBINE FOR HOME APPLIANCES

This invention relates to WIND TURBINE FOR HOME APPLIANCES.

Considering giant wind turbines which are large in size occupying more space cannot be installed in terrace, balcony of an house. Therefore only small wind turbines requiring less space can be implemented. Small wind turbine manufacturers in India are few in numbers meanwhile their selling cost is very high due to increase in tower height which is one of the main fact. Even electricity supplied by the government does not meet the requirements of users. Focusing on household appliances and implementing single WIND TURBINE in each terrace of a house is the only way to reduce electricity consumption. Generally, average annual wind speeds of at least 4.0-4.5 m/s (14.4- 16.2 km/h; 9.0-10.2 mph) are needed for a small wind turbine to produce enough electricity to be cost-effective.

The above mentioned problems are overcome by our invention which is done by reducing the size and selling it in a low cost. Thus, less space is only required to install or fix it like a television antennae. The materials used in this invention is of new kind which includes design and fabrication processes. Transportation is very simple that can be easily disassembled and shifted from place to place. Even installation can be done by normal person with little knowledge not engineering concepts are required. Our invention starts rotating at a wind speed of lower amount that contributes the cut-in speed as 2 m/s itself which is a major advantage.

Wind from open atmosphere is taken into consideration that when it strikes the blades of a wind turbine the blades start rotating.

This blades attached to the hub is then connected to gearbox assembly via the shaft. The rpm at which blades runs makes the generating section to produce double of it since stepper motor is used as a generator.

When connecting a pair of stepper motor the current output produced by it gets doubled than using a single one.

Thus, a range of output is produced at this stage in the form of an alternating current which has to be converted to direct current since battery storage is employed here.

Therefore a bridge rectifier is used to convert that alternating current to direct current which is then allowed to store in a lead-acid rechargeable battery.

Now this stored direct current is been converted to alternating current with the help a sine wave inverter. Thus, again we are getting back the alternating current and this alternating current fed to home appliances like fan, tube light, etc.

FIG 1 shows the schematic diagram of wind turbine for home appliances with our invention.

Referring to FIG I, blade 1 is connected to hub 2 which is then connected to primary wheel 3. Stepper motor 5 connected with secondary wheels 4 are coupled with primary wheel 3.

Ball hearing 6 placed on tower 8 joints the transmission system with that of the tail fin7.
Output of stepper motor 5 are given to bridge rectifier 9 then to battery 10 and again
inverted using sine wave inverter 11.
Finally stepped up using step-up transformer 12 to give output.

We claim:

1. Wind turbine for home appliances consists of blades attached to hub which is connected to generator using gearbox assembly, these as transmission system. This system is connected to tail fm via the ball hearing setup, which is responsible for automatic adjustment of whole horizontal portion according to the wind direction.

2. The design as claimed in claim I. where Blade of Hard board material fibre outer coating is used. Numbers of blade is 6 each of length 42 cm , Width of I2.7cm and Tilt angle is 45 degree.

3. Gear box ratio is 1:2.5 consisting of 1 primary wheel with 54 teeth & 2 secondary wheels with 20 teeth. Intersection of Primary with Secondary wheels is at 5 mm. All wheels are made of plastic.

4. AC STEPPER MOTOR 2 nos is used as generator. Each requires only max 120 rpm to generate 12 V, 3 A. Totally 12V, 6 A generated when both connected in parallel.

5. Tower supports the whole top horizontal setup & is grounded to the earth. This is made up of galvanized iron pipe. Length of 6 ft and Diameter of 3.17cm. Base of tower has 6 legs each of 40 cm length.

6. Yaw system consists of tail fm, connecting rod, Bearing. Connecting rod is of length 45 cm. Tail fin dimension is 8x10". Bearing which connects Hub to Tail setup with vertical tower. This has outer diameter of 10 cm & inner diameter of 3.17 cm.

7. Bridge rectifier consists of 4 IN4007 Diode for converting AC to DC. Which is then stored in battery of capacity 12 volt, 28 Ah. This DC is then inverted back to AC using SINE WAVE INVERTER and stepped up finally to 220v AC using step-up transformer.