JPS6034783U

JPS6034783U - DC power supply for arc processing

Info

Publication number: JPS6034783U
Application number: JP12517583U
Authority: JP
Inventors: 岩本　靖弘; 枡本　実
Original assignee: 株式会社ダイヘン
Priority date: 1983-08-11
Filing date: 1983-08-11
Publication date: 1985-03-09
Also published as: JPH0229837Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は、従来のアーク加工用電源の例を示す接続図、
第２図は加工用電源の出力電圧電流特性を示す線図、第
３図は本考案の実施例を示す接続図、第４図は本考案の
別の実施例の一部を示す接続図である。３・・・主電源回路、４・・・補助直流電源回路、５・
・・出力電流検出回路、６・・・基準信号設定回路、７
・・・位相制御回路、３ａ〜３ｆ・・・サイリスタ、４
１゜４１ａ〜４１ｆ・・・整流素子、４２．４２ａ、４
２ｂ・・・電流制限素子、１２・・・第２の電流検出回
路、１３・・・係数器、１４・・・加算器。Figure 1 is a connection diagram showing an example of a conventional arc machining power supply;
Fig. 2 is a diagram showing the output voltage and current characteristics of the processing power supply, Fig. 3 is a connection diagram showing an embodiment of the present invention, and Fig. 4 is a connection diagram showing a part of another embodiment of the invention. be. 3... Main power supply circuit, 4... Auxiliary DC power supply circuit, 5.
...Output current detection circuit, 6...Reference signal setting circuit, 7
...Phase control circuit, 3a to 3f...Thyristor, 4
1° 41a to 41f... Rectifying element, 42.42a, 4
2b... Current limiting element, 12... Second current detection circuit, 13... Coefficient unit, 14... Adder.

Claims

[Claims for Utility Model Registration] 1. A main power supply circuit that rectifies an AC power supply through phase control using a switching element to control the output current, and a main power supply circuit that is connected in parallel to the main power supply circuit and controls the output current by a current limiting element. In a DC power supply for arc processing having a limited auxiliary DC power supply circuit, a signal corresponding to the sum of the output current of the main power supply circuit and a part of the output current of the auxiliary DC power supply circuit is used as a feedback signal, A DC power source for arc processing, comprising a phase control circuit that determines the firing phase of the switching element based on the difference between the feedback signal and the reference signal. 2 The auxiliary DC power supply has two outputs divided at a predetermined ratio, each output being connected to both sides of a current detection circuit for feeding back the output current of the main power supply circuit, so that only one The DC power supply for arc machining according to claim 1, which has a structure in which the above is added to the feedback signal. 3. The main power supply circuit and the auxiliary DC power supply circuit each have a current detection circuit that independently detects only its own output current, and the phase control circuit multiplies the output signal of each of the current detection circuits by a predetermined number of threads. The DC power source for arc machining according to claim 1, which is a circuit that determines the firing phase of the switching element based on the signal of the difference between the sum of the signals and the reference signal. 4. The DC power supply for arc processing according to claim 1, wherein the ratio of the output current of the auxiliary DC power supply circuit to be added to the feedback signal is variable.