An EMC performance improvement method for three-phase half-bridge converter drive power supply

High-Voltage Power Supply for High Repetitive Rate Marx Generator with Quasi-Resonant Zero-Current Switching Transistor Control Algorithm

“…Thus, the current flowing in the primary winding is increasingly the resonant current flowing between the parasitic capacitances of the secondary winding and the dissipation inductance, and it causes a significant additional load of the transformer and a much greater current flowing in the primary winding, it increases energy losses. Therefore, many methods have been developed to help at least roughly estimate the capacitances values, both in classical [24,31] and simulation [26,27,32] methods, to decrease this problem in transformers through the use of appropriate winding techniques, The simulation was performed in LTSpice-high performance SPICE simulator software. Despite certain inaccuracies of the built-in models in the program and the developed transformer simplification, the model sufficiently presents the described problem.…”

“…Thus, the current flowing in the primary winding is increasingly the resonant current flowing between the parasitic capacitances of the secondary winding and the dissipation inductance, and it causes a significant additional load of the transformer and a much greater current flowing in the primary winding, it increases energy losses. Therefore, many methods have been developed to help at least roughly estimate the capacitances values, both in classical [24,31] and simulation [26,27,32] methods, to decrease this problem in transformers through the use of appropriate winding techniques, Therefore, many methods have been developed to help at least roughly estimate the capacitances values, both in classical [24,31] and simulation [26,27,32] methods, to decrease this problem in transformers through the use of appropriate winding techniques, as well as to predict the possible impact of this phenomenon on the operation of the device, and select the appropriate design.…”

“…The phenomenon of parasitic capacities is usually undesirable, as it causes a number of problems related to high-voltage high-frequency transformers, which cannot be ignored and necessitate a change in the approach to the design of HV power supplies [21]. These capacities cause distortions of the currents flowing in the primary and secondary windings of the transformer, causing the occurrence of higher harmonics of these currents, increasing energy losses both in the windings related to the winding resistance (caused by a higher current value and the skin effect), losses on semiconductor elements and in the power supply [22], forcing additional cooling or increasing the size of the elements used, including the transformer core [23,24]. Moreover, this phenomenon may also cause the occurrence of electromagnetic disturbances [22,25] and difficulties with control (especially in the case of resonant converters), and affect the output voltage of the transformer.…”