Method of and apparatus for pulse generator for electric discharge machining
US5280153A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1992 |
| Grant date | Jan 18, 1994 |
| Priority date | — |
| Expiry date | Mar 11, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H2300/20
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The pulse generator for electric discharge machining contains neither load resistors nor magnetic components. The pulse current is continuously detected by a current sensor 4 and this measured value fed to a control circuit 5. Via switch elements 10, 11 and the spark-circuit inductance 3, the pulse current is developed in accordance with a desired value called for by the system connection 6. At the pulse end, the energy present in the spark-circuit inductance 3 is discharged into capacitors 37, 38 and from there recuperated in the source of dc voltage 1 or, upon the next current pulse, in the spark circuit 2, 3. This is possible with only two switch elements 10, 11. One terminal of the source of the dc voltage 1 is common with an electrode of the spark path. By means of further switch elements 12, 13, it is also possible to control the no-load voltage and/or the current impulse slope. This generator is particularly small, light and inexpensive and is of very high efficiency. It can easily be integrated in larger systems and several modules can be fed from a single source of dc voltage 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.