The subject of this diploma thesis is design of electric assisted city bicycle – so called pedelec. The aim was to propose a design that will meet both the requirements of clientwork and the criteria of timeless design with modern materials and technology. The result is a design which, compared to commercially available electric bikes, stands out with much better weight distribution and user comfort.The thesis is soluted by design,technical, ergonomic, psychological and economic terms. Diploma thesis has 84 pages.

The objective of this master's thesis is new power converter design for bicycle with combustion engine and electric power transmission. The power converter is control by microprocessor and control algorithm is designed to achieve maximum efficiently of combustion engine. Converter and servomotor for controlling combustion engine throttle are located in metal box. Hardware, firmware and metal box are designed in the thesis.