Power supply circuit for spark erosion
US4678885A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 1985 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | May 10, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H2300/20
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A circuit arrangement for producing machining pulses in a spark erosion installation from a direct current power source that functions without the use of ballast resistors. There are at least two controllable circuits which are parallel to the spark gap and to one another and whose output currents are additively superimposed for a total current flowing through the spark gap. The control inputs of the circuits are connected to a control circuit, which produces time-associated control signals, the nature of the time circuit cooperates with the control elements of the circuits, so that a current pulse is only allowed to pass to the spark gap if the switches controlled by the control elements are simultaneously open.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.