Research on Current Control Technology of Fine Plasma Cutting

DOI

10.2991/ismems-16.2016.64How to use a DOI?

Keywords

Fine plasma, Current calibration, Current PI control

Abstract

The precision control of cutting current is the important performance index of the plasma cutting power supply, so the study of plasma cutting current control strategy have great significance. This paper first summarizes the development situation of plasma cutting power supply, and the domestic plasma power supply is mostly in the ordinary plasma stage, then, based on the characteristics of plasma arc, the volt-ampere characteristics and pulsation characteristics of the plasma arc are analyzed, the open-loop control and the closed-loop control strategy of cutting current are proposed to design the current cutting control system of the fine plasma cutting power supply, the open-loop control system is based on current calibration after cutting power supply linear test. Closed-loop control is a step response to establish power model, using PI control strategy and simulation debugging with MATLAB. Finally, the experimental results show that the cutting current PI control is superior to the open-loop control in current waveform ripple control, and the relative error can be controlled to 3.8%, which greatly improves the cutting current performance of the plasma cutting power supply

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Guoping Li
AU  - Qi Cao
AU  - Yujian Fu
PY  - 2016/12
DA  - 2016/12
TI  - Research on Current Control Technology of Fine Plasma Cutting
BT  - Proceedings of the International Symposium on Mechanical Engineering and Material Science
PB  - Atlantis Press
SP  - 380
EP  - 386
SN  - 2352-5401
UR  - https://doi.org/10.2991/ismems-16.2016.64
DO  - 10.2991/ismems-16.2016.64
ID  - Li2016/12
ER  -