Insulation resistance of material is usually measured by UI method, where the measured insulating material represents load which is supplied by direct voltage. Electric
resistance is calculated from the measured voltage and current.
Insulation testers contain high-voltage source, the voltage of which directly affects
the accuracy of measurement of insulation resistance.
The main objective of the thesis is to implement a simple and cheap well-regulated
high voltage DC source for measuring insulation resistance with regard to the requirements and resources of the client. At the beginning are presented physical properties of insulators, basic principles of measurements of insulating resistance and
typical problems that occur in such measurements. Follows the detailed static and
dynamic analysis of flyback converter, on the basis of which optimal parameters of
key components were found. Furthermore, the development and implementation of
control algorithm are described. Finally, follows the implementation of the power
supply and output voltage regulations which are supported by experiments on real
applications.
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