半桥式晶闸管弧焊逆变器变换过程研究及工程设计

Conversion Process Study and Engineering design of Half bridge Type of Thyristor Arc Welding Inverter

通过调制脉冲波头阶段微分方程式的推演，证明了通过换流电容对称、非对称或单边配置，实现功率变换有级调节的原理。介绍了变比ｎ 的计算以及它与转折电压ＵＭ 的关系。最后，根据磁密设计状态及输出功率，得到了设计中频变压器基本尺寸的公式，给出了电磁计算的基本步骤。

By the derivation of the differential equation during pulse wavehead, the principle of converted power step regulation, that isrealized through symmetrical of unsymmetrical arrangement of commutating capacitors, is porved. The calculation of turns ration of midium frequency transformer and the relation between then and turningvoltage UM are discussed. Finally, according to the design state tomagnetic flux density and rated output power, a formula for designing midium frequency transfomer is obtained, basic steps of electromagneticcal culation are given out too .