Novel asymmetrical half-bridge ZCS arc welding inverter power;

Research of ZVS-ZCS PWM Soft Switch;

High-Power Asymmetrical Half-bridge ZCS Quasi-Resonant Converter;

A phase shift converter can achieve zero voltage switching on the leading leg and zero current switching on the trailing leg by utilizing the reverse avalanche characteristics of IGBT.

A restrictive condition for zero current experimental technology to choose different experimental technology to choose different components ,parameters is discussed in the article.

The operation principle and circuit structure of half-bridge zero-current quasi-resonant CO_2 laser switching power supply are presented and analyzed,and its mathematical model is established.

This paper presents analysis in detail and designs a Zero-Current-Switched Quasi-Resonant SEPIC converter in full-wave mode.

This topology, combining four switches with double half-wave rectifier and using variable frequency control mode with a refined small times together, achieves the effect of Zero Voltage Switching (ZVS) and the effect of Zero Current Switching (ZCS) by the resonance of resonant capacitance, resonant inductor and the magnetic .

The paper Presents the principle of selective leakage protection based on zero sequence current direction.

This paper analyzes the basic principle of Sel587 differential protection device and elaborates the influence of zero sequence current .

In order to reduce influences of varieties of operation conditions of power systems and differences of grounded fault type on the protecting range of the instantaneous zero sequence current protections of transmission lines,a feasible method for realizing the adaptive instantaneous zero sequence current protections was put forward.

Comparative analysis on zero-sequence current of Y,y_(no) and D,y_(n11) transformers;

Analysis of transient process of zero-sequence current during single-phase reclosure;

Polarity check of zero-sequence current and voltage based on microcomputer protection;