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Wind turbine display

Wind turbine generator using a Fisher and Paykel washing machine motor

The blades on this turbine are high speed low torque, they need a high torque low speed blade to get them turning when there is a load on. It goes fine as seen in the clip below with no load (watch out it will go so fast you wont be able to see the blade). I suggest trying a centripital switch on the axel to disconnect the load at low revs or a drum type blade to get it going.

Movie of it spinning, click here - clip

Instructions to build this, click here  -  Build it

See also http://www.velacreations.com/makechispito.html

See Sustainable Toys

Demonstration Fisher and Paykel wind turbine, made using one of their smart drive motors from a scrapped washing machine.

The Fisher and Paykel smart drive motor is a permanent magnet motor.
Most electric motors used in household equipment do not have permanent magnets.
The permanent magnets mean that these motors make good electricity generators.
When a magnet passes by a wire it induces a current in it.
The permanent magnets in the rotating drum part of the motor pass by the coils of wire on the metal spindles of the stationary part of the motor inducing currents in the coils of wire.
Coils are used so that the length of wire passing the magnet is longer and the current induced larger.

  FPwindpieces

I have made this in pieces so it can be taken down and assembled in about 2 minutes and taken to fairs and displays. If you want to borrow it give me a call or email me.

FPwinddetail1  FPwinddetail2

3 inch galvanised steel pipe pole
Detail, original Bearing mount used
Vertical bearing is from a second washing machine

Blades and mounting plates from Ecoinnovation www.ecoinn.co.nz. They have a complete DIY manual for Fisher and Paykel motors.

There is almost no point in rewiring the motor. It generates about 100 Volts AC three phase at moderate revs and stays fairly constant at about that as the revs increase. Simply put a 3 phase rectifier on the output of the motor and convert the AC to about 100 Volts DC.

This can be used to power brushed AC motors - electric drills, orbital sanders, food processors and the like. It will also power switch mode power supplies - that is TVs not more than 10 years old, lap top chargers, flat screen TVs, PCs, mobile phone chargers, almost anything with a small charger unit. It will not power induction motors (fan in bathroom, pedestal fan etc).

Switch mode power supplies are built for US (110 V and European 240 V power). Their first stage is a full wave rectifier so they rectifiy the electricity to DC so putting DC into them at about 100 V is adequate. Next they chop the voltage at a kilohertz or so and then pass the power through a small transformer (transforms get alot more efficient at high frequencies and smaller) and then rectify to DC at voltages required by the circuit board in the device.

So about 95% of things in your house will run on 100 V DC and interestingly a sine wave inverter is not required. A 96 Volt battery bank without inverter will just about run your house with no problem. Only the fans wont go, the frigde and washing machine wont start (they have a capacitor and start winding that need AC - bad luck about that).

So what you can do is find a DC to DC converter (these are pretty common in industry off the shelf) or a battery charger that has a switch mode power supply on the input side, use this to charge a 96 Volt battery bank, and if you need the AC connect a sine wave inverter (see UPS article on this web site) to the battery bank. Cheap, simple, off the shelf .

See the UPS power supply section on this web page. These have sine wave inverters in them and thousands of them are thrown away every year. Find a 3 kW continuous rated one (watch out - old ones dont have hot swap batteries so send me an email for some notes on what not to do.)

cheers

jonathon.thwaites@uwa.edu.au
 

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