In 1828, he constructed the first direct-current motor with electromagnet and commutator (see Picture 1).
In 1861, he described the principle of self-excitation used for production of electronic energy first time in the world. He also attempted to apply it in homopolar generator. Since he did not patent his inventions of the direct-current motor and dynamo, the world acknowledged other inventors of these products.
The activity of Ányos Jedlik is proved by working model of electronic vehicle (auto or locomotive) in 1855. The jury of the World Exhibition of 1873 in Vienna awarded his voltage multiplying condenser of cascade connection with prize "For Development". Through this condenser, Jedlik framed the principle of surge generator of cascaded connection. The jury was headed by Werner Siemens who had framed the principle of self-excitation in 1866 and used as direct-current generator named "dynamo".
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