July 2015 – 350W small hydro turbine with an iron powder core for battery charging

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Winding the coils

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Using the jigsaw to cut plywood pieces for the moulds

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Cutting the plywood magnet template

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Assembling a rotor mould

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Fitting the magnets in the template

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Connecting the two stators, one designed for a single rotor and the other for a double rotor

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The coils connected and ready for casting

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Gluing magnets on the galvanized metal disk using the template

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The magnet disk ready for casting

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Cutting some fiber glass to reinforce the resin

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Casting the two rotor disks

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The mould filled with resin

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The fiberglass piece is added before closing the lid

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After laying a fiber glass piece the coils are placed in the mould

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The coil holes are filled with an iron powder and resin mix at a 3:2 ratio

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Care is taken not to spill the mix outside the coil holes

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The rest of the stator casting is filled with vinylester resin as usual

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Care is taken not to blend the two different resin mixtures

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A piece of fiber glass is placed on top once all the resin has been poured in

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The lid is fastened to the rest of the mould with bolts and nuts

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