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Most disc, block and ring magnets can be used in generator applications. The size, shape and material choice ultimately depends on the design and the environment of the design.
Faraday’s Law is the basis behind generators – it explains how a magnetic field is used to create electricity in a copper winding. It is sometimes shown as E=N*A*(dB/dt). Knowledge of how to use Faraday’s Law allows generators to be designed for maximum efficiency.
We are often asked to assist with the design of generators, ranging from specifying a magnet to use through to the actual design. The level of enquiry ranges from a curiosity about the fundamentals of generator theory through to ways of getting the most from the generator and the buying of custom magnet sizes.
We offer two methods of learning about generators.
The first is our Electric Motor-Generator Science Discovery Kit (part of a range of Science Discovery Kits from our Educational Magnets website). This offers a simple motor and generator experiments kit to introduce motors and generators that use magnets (the generator can be used to illuminate a LED light) and is ideal for people aged 10 or above.
The second is a more detailed introduction to generators aimed at secondary school, university, R&D groups and companies allowing high voltage a.c. and d.c. to be generated. We have called it “A Design for a Generator”. We have also included a section on products that can be bought to allow the user to make the Generator (please note that, in order to make the generator, the user is required to source other components beyond that shown in the products list).
We also offer magnets that can be used in generators. The “A Design for a Generator” will assist you in your magnet choice. We can make magnets to your dimensional requirements in a wide variety of materials and grades – please contact us for a quotation.