| Abstract |
When solving the problems of electric power quality converters with high power factor and low level of current
distortion are useful. Resonant converters of 50 (60) Hz AC-DC are described, where each half-cycle of network voltage the capacitor and inductor of an oscillatory circuit are switched from series into parallel and vice versa. ]ne duration of series and parallel connection and also the transformer ratio arc parametrically dependent on load. 50 Hz oscillatory circuit restrict higher harmonics. Parallel oscillatory circuit restricts short circuit current. Making use ofthyristors or transistors is not necessary for supplying electrical arc with variable voltage. These converters are network-friendly, with high power factor and suitable for fluctuating loads. When used with arc furnaces they enable to manage without expensive dynamic
compensators. The operating principle of the converters, arc furnaces voltage and current control and Power Supply ESTA characteristics are discussed. |
