Pulsed electron beam welding grid power supply design

A new pulsed electron beam welding grid power supply was developed, which includes gridbias base circuit and gridbias pulse circuit. The power supply can produce both direct current gridbias and pulse gridbias, in another word, it can realize not only direct current electron beam welding but also pulsed beam welding at one equipment. The gridbias base circuit controls gridbias pulse base, while the gridbias pulse circuit controls gridbias pulse peak, gridbias pulse frequency and gridbias duty ratio. The pulsed electron beam welding grid power supply can realize beam current pulsed welding, at the same time, gridbias pulse frequency, pulse duty ratio, pulse base value and pulse peak value can be adjusted continuously, and beam current pulse frequency and pulse base value can be adjusted correspondingly. The test proves that the pulsed electron beam welding impulsion effect made electron beam welding keyhole effect much more evident than direct current beam welding at the same beam current.