The Development Of A New Type SPWM Mode Operating Frequency Current And Voltage Supply For The Electric Energy Meter Accuracy Testing Equipment

The traditional power amplifier circuits (most of them have OCL structure) are low-efficient and bulky ones. However, with the development of switching-power-supply technology and the emergence of new power-electronic devices, there are ways to develop a new type switching-power-supply with high stability and low distortion to take place old ones now.After the study of various power converting circuits, new design ideas are proposed in this thesis. Some kinds of circuits embodied these ideas are tested in experiments. Through the analysis of experiments data and designs comparing, we explore the feasibility of working out a high fidelity voltage source and give a practical design of the high fidelity current source.Qiang Wang (Electronic Technology Application) DIRECTEDBY Dai Zhengang...