The goal of this diploma thesis is design of the electric wheelchair. The purpose is designed with knowledge of historic and todays devices for handicapped people. The design respects aesthetic, ergonomic and technical requirements. The electric wheelchair would go over the usual obstacles, would be solution of long sitting problems and also have an interesting and modern feel.

Main goal of this master thesis is designing of a part of electric vehicle driving unit for mixed traffic. The drive purpose is to replace main drive of a utility van. First part of the thesis contains description of methodology used for energy consumption evaluation. In the next part there is description of current electric drive used in the van, design of a new one, best variant selection to suit company needs, energy consumption calculation, design and realization of the drive holder and final comparison of current and new drive design.

The objective of this semester thesis is design of the control algorithm, needed control and power circuits and PCB design for the unfinished bicycle concept with a combustion engine and electric power transmission. The control algorithm had to be designed to make efficient use of the combustion engine performance and to minimalize the fuel consumption and noise level of the device. All circuits are fully implemented by analog components for which were designed printed circuit boards using program Eagle and this boards were revived and debugged.

This work deals with a proposal and construction of a DC/DC converter for a control of a DC motor Heinzmann. The DC/DC converter will be used in an electric drive for a bicycle. The proposal of the DC/DC converter is designed for such engine power to avoid fully any human force to drive - pedaling. The work includes informations about the used motor, progress of proposal and dimensioning of the converter - power circuit and control electronics.

A conceptual design and realization of a motor bike using combustion engine and electrical power transfer is the objective of this master´s thesis. Control strategy that allows combustion engine to reach maximal efficiency cooperating with wide range speed and torque operating area electromotor was created. All function blocks were realized. Also hardware of all needed parts was developed. The last part was a design and debugging of control software. Finally the functionality was documented by test drives and measurements.