However, the more affordable market alternative is the PMMC generator motor (or permanent magnet, moving coil). Since these motors don’t require brushes to move the coil, they are less prone to degradation. The very best home wind turbine generators operate with a permanent copper coil, around which moves a moving magnet. The power of the wind is infinite, but wind turbines, on the other hand, do not last forever. Inside the WTG, the generated torque forces a magnet and an electrical coil to interact, which (in accordance with Faraday’s law of electromagnetic induction) produces AC voltage: the type of electricity we require to power our homes. Finally, the gearbox feeds its mechanical energy into the wind turbine generator. This driveshaft is connected to a gearbox, which – through an increasingly smaller set of gears – dramatically increasing the torque generated by the turbine (in other words, a few RPM can be ramped up to hundreds or thousands of RPM). To be more specific, once wind begins rotating the blades of the turbine, the rotating blades turn a driveshaft inside the body of the turbine. In short, wind turbine generators take the slow kinetic energy produced as wind forces turbine blades to turn, and converts this energy into electrical charge, or voltage, which can then be used to power our homes and the electrical grid. That’s where wind turbine generators (WTGs) come in. However, wind power itself is not strong enough to generate electricity without some further help. In these circumstances, the kinetic (or mechanical) power of the wind is utilised in its mechanical form, and as the blades of the turbine turn, so too does the machinery it’s attached to.
Wind turbines have been in use long before the discovery of electricity, when the power of the wind was used to pump water and turn grinding wheels in mills (hence the term ‘windmills’). Before we get stuck into the rest of the market, we should first explain how wind turbine generators work.
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