A Novel Experimental Measurement Method of Transformer Parasitic Capacitances

Wang, Naizeng; Xu, Yang; Zhou, Angyang; Xie, Yiting

doi:10.23919/icpe2019-ecceasia42246.2019.8797157

Cited by 2 publications

(3 citation statements)

References 25 publications

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“…This energy is greater the higher the voltage at the transformer output, which reduces the transformer efficiency [22,26]. In order to demonstrate this problem, a simplified transformer model was prepared (Figure 3), in which all of the parasitic capacitances of secondary winding are presented as a one capacitance (Cpar) connected in parallel with this winding [27][28][29][30]. The primary winding was supplied with 10 V, 10 kHz rectangular voltage.…”

Section: Parasitic Capacitance In the Secondary Windingmentioning

confidence: 99%

“…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.…”

Section: Parasitic Capacitance In the Secondary Windingmentioning

confidence: 99%

“…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.…”

Section: Parasitic Capacitance In the Secondary Windingmentioning

confidence: 99%

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

Pachowicz

2022

Energies

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Due to having a number of advantages, Marx generators are still the most widely used devices for generating high-voltage pulses in many fields of science and technology. To ensure their proper operation, especially when the generation of many frequent, highly repetitive pulses is required, a highly efficient high-voltage power supply is needed. The paper describes a specially developed power supply (input voltage 48 V DC, output voltage up to 50 kV) based on the conventional Full Bridge topology with two high-frequency high-voltage transformers and a 6-stage voltage multiplier. In order to avoid many problems caused by low coupling between primary and secondary windings of the transformers and the large parasitic capacitances of the secondary windings, a special quasi-resonant zero-current switching transistor control algorithm with variable switching frequency (dependent on output load) was developed. In the described method, the energy is supplied to the transformer in short pulses, when a pair of diagonal transistors of the full-bridge converter were turned on. Then, the freewheeling state is maintained until all of the energy stored in the leakage inductance of the transformer has been transferred to the secondary side, which means that the current in the primary windings drops to zero. This approach reduces energy losses, electromagnetic disturbances and prevents current distortion in primary winding.

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Section: Parasitic Capacitance In the Secondary Windingmentioning

confidence: 99%

Section: Parasitic Capacitance In the Secondary Windingmentioning

confidence: 99%

“…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.…”

Section: Parasitic Capacitance In the Secondary Windingmentioning

confidence: 99%

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