Capacitive discharge welding system
US10967454B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jun 12, 2017 |
| Grant date | Apr 6, 2021 |
| Priority date | — |
| Expiry date | Oct 13, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K11/36
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A capacitive discharge welding system includes at least one capacitive discharge-based power supply that is adapted to provide alternate polarity pulses from a first weld to a subsequent weld, and to be compatible with iron-core transformers used for alternating current resistance welding; at least one iron core transformer adapted to receive electrical discharges from the capacitive discharge-based power supply; a polarity switching network that includes at least two sets of silicon controlled rectifiers that are arranged in pairs for facilitating current flow in alternate directions; a pair of engagable, properly biased shunt diodes that are operative to shunt reflected current for protecting the silicon controlled rectifiers when the system is in use; and a control network configured for simultaneous engagement of the properly biased shunt diodes and firing the silicon controlled rectifiers for current flow; and tracking polarity for assuring that subsequent pulses use opposite direction current flow for preventing saturation of the iron core transformer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.