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- W2019940988 abstract "The goal of this project was to construct a low-technology, maintenance-free dc electrical generator suited for use with low-speed rotating machines such as windmills or waterwheels. The generator consists of permanent magnets affixed to the circumference of the rotating device, and stationary coils mounted on a semicircular frame. As the device rotates, the magnets move past the coils and magnetically induce an ac voltage in the coils. This voltage is rectified and stored in a battery. No gears, belts, or brushes are used, so the generator operates quietly and without maintenance. The purpose of mounting the magnets at the circumference of the rotating device is to achieve high relative velocities between magnets and coils even at slow rotations, in the hope of extracting energy from very light winds or slowly flowing water. Such a generator was constructed as part of a ten-foot-diameter windmill to test the concept. The generator easily reaches charging voltages at low speeds, and operates quietly without mechanical wear. But the charging current is very low in comparison to a wind turbine of conventional design. The experiment allows fundamental design problems to be identified." @default.
- W2019940988 created "2016-06-24" @default.
- W2019940988 creator A5087290396 @default.
- W2019940988 date "1983-03-31" @default.
- W2019940988 modified "2023-10-14" @default.
- W2019940988 title "Improved generator for use with low-speed rotating machines. Final report" @default.
- W2019940988 doi "https://doi.org/10.2172/5540072" @default.
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