KR970009953A

KR970009953A - Electric Discharge Power Supply System

Info

Publication number: KR970009953A
Application number: KR1019950025803A
Authority: KR
Inventors: 유지 가네꼬; 따다오 우에다; 요시히로 와따나베; 다쯔오 도요나가
Original assignee: 후루카와 도시히코; 소딕 가부시끼가이샤
Priority date: 1995-08-18
Filing date: 1995-08-18
Publication date: 1997-03-27
Also published as: KR100322324B1

Abstract

변성기는 도구 전극과 피가공물 사이에 형성된 간극으로부터 거리를 두고 배치된 파워 서플라이 유닛으로부터 동축 케이블을 통해서 전송되고 직류 파워 서플라이와 스위칭 소자를 가지는 고주파수 펄스를 고주파수 교류로 변환하며 그 간극에 접속되어 있다. 변성기는 환형 철심과, 동축 케이블에 접속된 1차 권선 및, 간극에 접속된 2차 권선을 포함한다. 양호하게는 이들 권선들은 최소 권선수를 갖는다. 더욱이 우회 통과 수단이 제공되며 이 수단은 변성기에 여기된 직류 파워 서플라이로부터의 직류 펄스 또는 교류 펄스를 간극으로 선택적으로 통과시킨다. 우회 통과 수단과 변성기는 간극의 근처에 위치 조정된 하나의 케이스에 하우징되는 것이 바람직하다.The transformer is connected via a coaxial cable from a power supply unit arranged at a distance from a gap formed between the tool electrode and the workpiece, and converts a high frequency pulse having a DC power supply and a switching element into high frequency alternating current and is connected to the gap. The transformer includes an annular iron core, a primary winding connected to a coaxial cable, and a secondary winding connected to a gap. Preferably these windings have a minimum number of turns. Furthermore, a bypass pass means is provided, which selectively passes a direct current pulse or an alternating current pulse from the direct current power supply excited to the transformer into the gap. The bypass means and the transformer are preferably housed in one case positioned near the gap.

Description

Electric Discharge Power Supply System

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명의 일시시예에 의한 파워 서플라이 시스템을 도시하는 개략적인 블록도.1 is a schematic block diagram illustrating a power supply system according to one embodiment of the present invention.

제3도는 직류를 교류로 변환하는 변성기와, 그 변성기와 변성기 우회통과 스위치를 하우징하는 케이스의 위치를 도시하는 개략도.3 is a schematic diagram showing the position of a transformer for converting direct current into alternating current and a case housing the transformer and the transformer bypass and a switch;

제4도는 제3도에 도시된 케이스안의 회로를 도시하는 개략적인 블록도.4 is a schematic block diagram showing the circuit in the case shown in FIG.

제5도는 제4도의 스위치들중 한 스위치를 상세히 도시하는 부분도.FIG. 5 is a partial view detailing one of the switches of FIG. 4; FIG.

Claims

A power supply system for electric discharge cutting in which a workpiece is cut by electric discharge by supplying power pulses to a cutting gap formed between a tool electrode and a workpiece, the DC power supply and the ON time control and Pulse generation means for generating a series of pulse signals for performing OFF time control, a switch connected in series with said DC power supply and converting a DC flow from said DC power supply into pulses in response to said pulse signal, and one end A first conductor connected to the terminal of the DC power supply, and a second conductor connected at one end to the other end of the DC power supply, and the inductances of the first and second conductors A cable configured to reduce and transmit a DC pulse flowing through the switch near the cutting gap And an input side connected to the other end of the first conductor and the other end of the second conductor and an output side connected to the cutting gap and positioned near the cutting gap, from the DC power supply And a converting means for converting a DC pulse into an AC pulse via a switch, wherein the AC pulse flows through the cutting gap.

The power supply system for electrical discharge according to claim 1, wherein said cable comprises a coaxial cable.

2. The converting means according to claim 1, wherein the converting means comprises a sweeping group having a primary winding connected to one end of the cable and a secondary winding connected to the cutting gap, wherein the cutting gap is the primary winding by electromagnetic excitation. The power supply system for electric discharge, characterized in that to pass the energy through the secondary winding in the DC power supply supplied to.

4. The power supply system for electrical discharge as claimed in claim 3, wherein the transformer includes an annular core for conducting an excitation current.

The power supply system for electrical discharge according to claim 1, wherein the DC power supply comprises a variable DC power supply.

4. The power supply for discharge according to claim 3, wherein the primary winding has a minimum number of turns.

7. The power supply system for electrical discharge according to claim 6, wherein the number of turns of said primary winding is one.

8. The power supply system for electrical discharge according to claim 7, wherein the winding sum of the primary winding and the secondary winding is four or less.

2. The power supply system for electrical discharge according to claim 1, further comprising means for electrically bypassing said converting means.

The said bypass passage means is a 3rd conductor with one end connected to the other end of the said 1st conductor, and the other end connected to the said tool electrode or the to-be-processed object, and one end. A fourth conductor connected to the other end of the second conductor and the other end connected to the tool electrode or the workpiece, and controls the flow of current through the third and fourth conductors. A power supply system for electric discharge, characterized in that it comprises a switching means.

11. The power supply system for electrical discharge according to claim 10, wherein said conversion means and said switching means are housed together in a single case positioned near said cutting gap.

The power supply of claim 1, further comprising a second DC power supply, a second switch, and a current limiting resistor connected in series to the second DC power source, wherein the second DC power supply is connected to the first DC power supply. Power supply system for electrical discharge, characterized in that connected to the switch in parallel.

※ Note: The disclosure is based on the initial application.