Using polyester resin

Polyester is the plastic substance used in fiberglass work for building boats, car body parts, etc. Various things are added to it to make it work better for various jobs. Talk to your supplier and explain what the resin is to be used for. Your supplier should be able to help you. There are two systems used to harden polyester resin, and each system uses two chemicals. For resin casting and most fiberglass work we use peroxide and cobalt. ('Car body filler pastes' use the other system.) Cobalt...

Yaw Bearing

There are 12 magnet blocks on each rotor. We embed the blocks in a polyester resin casting to support them, and to protect them from corrosion. Each magnet block has a north pole and a south pole. The poles are arranged alternately, so north faces the stator on one block and south on the next. The poles on the other magnet rotor are arranged in the opposite polarity, so that north poles face south poles across the stator. In this way, a strong magnetic flux is created through the stator between...

Info

Would deliver 200-300 volts DC to the inverter depending on windspeed. The software in the inverter would run the wind turbine at its optimum speed and voltage to get best output. However the software needs to be adapted to suit particular machine characteristics, and I am not aware that anyone has done this yet for these homebrew machines. The plans include a description of how to construct furling tails. They prevent overload in high winds. This type of furling system has been in use on...

Controlling the battery charge rate

Lead acid batteries should be kept in a charged condition. In the case of a wind-powered system, you may have to wait for a wind to charge the battery. But be careful not to discharge the battery too deeply, or to keep it too long in a discharged state, or it will be damaged (sulphated) and become useless. Stop using a battery before it is fully discharged. If there is a problem with the wind generator, then charge the battery from another source within two weeks. Charging the battery too hard...

Guyed tower ideas

Guyed Tower For Windmill

The mast or 'tower' is usually made from steel waterpipe. 2 pipe is sufficient for 2.4 metre rotors, but larger sizes are also OK. The tower must be tall enough to hold the wind turbine up and out of any turbulence, into a good clean wind. The higher the better is a good rule, but optimum height will depend on location. In a very open location a 20' 6 metre tower might do. In many cases it will be necessary to go to 40' 12 m or 60' 18 m to reach clean wind. In the USA, 120' 36 m are not...

Ac Wires From Stator

Connect all five wires together and the torque will be smooth and very stiff. There will now be a current all the time. There are two ways to connect to the bridge rectifiers. The easiest way is to use crimped 'faston' or 'receptacle' push-fit connectors, which slip onto the blade terminals on the rectifier units. Take care that the blade enters the right slot, and does not force itself between the receptacle and its insulating sleeve. It is worth buying the best quality crimp connectors to...

Choosing suitable wire sizes

Power is lost in wiring due to its resistance to current flow. The current flow is larger for lower battery voltages. Loss varies in proportion to the square of the current, so 12-volt battery systems will end much thicker wire than 48 volt battery systems. The wires from the wind turbine to the battery have to be large enough to carry the current without overheating. If the wire run is long then you also need to check whether the power lost is acceptable. Use thicker wires for longer runs. The...

Furling System Theory

Why How the furling tail Controlling the thrust The tail Cutting out the tail vane_________________________.38 Hub and Stator mounting Back magnet The Front magnet Connecting the rectifier_______________42 Short circuit AC voltage DC voltage Connecting to the Connecting the Fuses or circuit Brake Choosing suitable wire sizes._____________________44 Wire Fining and balancing the blades__________________________45 Checking the Balancing the Fine Guyed tower ideas________________________47...