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Custom Motor Specialist Enters Micro-Renewables Market

01 September 2005

AEG is no stranger to the renewable energy sector. Last year it delivered eight generators to the Pelamis wave energy converter, an hydraulically operated wave power electricity generating system designed and built by Edinburgh based Ocean Power Delivery. The 125kW units were based on AEG's standard AM315 asynchronous motors.More recently - and at the other end of the scale in the micro-renewables sector - the company has adapted a 90mm frame motor for a domestic wind generator being pioneered by the Glasgow based company, Windsave ( Both of these projects relied implicitly on AEG's ability to adapt its products for a specific purpose, taking into account all of the application's environmental and safety factors.The generator for the Windsave unit was developed by AEG's squirrel cage induction motor technology centre in Italy, with input from its permanent magnet motor unit, also based in Italy. It has a maximum power output of 1kW for a wind speed of 12m/s, and will even produce power at wind speeds as low as 3m/s. An inverter/control unit is supplied with the roof mounted generator. This ensures phase synchronisation and voltage compatibility with the supply from the Grid, as the unit has to be plugged directly into a ring main to supplement the domestic supply. British Gas has agreed to partner Windsave in marketing, installing and maintaining the product, which can be purchased and installed for around £1,500 - or less, subject to available grants.The generator developed for this application has a maximum speed of 1,100rpm, and a special braking system to prevent over-speed in high winds. It also features special rotor laminations and windings to maximise efficiency, and rare earth magnets to achieve the rated power output.

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