Capacitive discharge welding power supply and capacitive discharge welder using the same

摘要

A capacitive discharge (CD) welder includes a charging circuit, a capacitor bank, an insulated gate bipolar transistor (IGBT), a pulse transformer and a secondary circuit. The charging circuit takes incoming electricity and charges a capacitor bank. The capacitor bank stores energy. The IGBT electrically connects and disconnects the capacitor bank to the pulse transformer. The pulse transformer reduces voltage from that stored in the capacitor bank to the desired welding voltage. The secondary circuit electrically connected to the pulse transformer provides a welding current corresponding to the output to the material being welded.

主权项

1. A capacitive discharge welder comprising:
a capacitor bank for storing energy; a pulse transformer for converting energy supplied only by the capacitor bank at a first voltage to energy at a second voltage; an insulated gate bipolar transistor (IGBT) for selectively electrically connecting the capacitor bank to the pulse transformer, wherein the IGBT is configured to electrically disconnect the capacitor bank from the pulse transformer prior to saturation of the pulse transformer in response to a control signal; and a secondary circuit electrically connected to the pulse transformer, the secondary circuit for supplying a welding current to a part to be welded based on the energy received from the capacitor bank and the second voltage.