[Purpose] To provide a capacitive welder capable of sufficiently resetting the magnetism of a welding transformer and capable of quickly charging a welding capacitor and also provide a method of charging the capacitive welder. [Solution] The capacitive wel...

A single-phase voltage source AC/DC converter (40) according to the present invention generates a second axis voltage command from difference between a DC voltage detection value (31,V D ) at a DC terminal (22) and a DC voltage command value V D * and cont...

An object is to provide a single-phase Voltage type AC/DC converting device and a three-phase voltage type AC/DC converting device arranged between a load and a distribution network and is capable of contributing to stabilize a system frequency and a syste...

Disclosed is an automatic synchronous parallelization apparatus capable of suppressing an inrush current by automatically adjusting the magnitude, the frequency, and the phase of the voltage when a single-phase voltage-type DC-to-AC converting device perfo...