Welding Current Control using a Frequency-Controlled Inverter Power Supply

摘要：

The equivalent resistance of welding points connected to spot welding machines varies significantly depending on welding current, welding time, electrode pressure and other factors. Precise welding current control is considerably more difficult when welding current reaches 10 kA or above. This problem can be resolved by controlling current so that the welding current is maintained at a target amperage. As a method of controlling welding current, the authors proposed controlling the inverter frequency so that the welding current matched a target value. Implementation of this current control method requires the high-precision detection of inverter current up through the kA order. This paper discusses the prototyping of an RI drop type current sensor designed to make it possible to detect welding current in frequency control type inverter power supply. Experimental results confirm that precise welding current control is possible.

关键词： welding current inverter current current detection RI drop type current sensor detection accuracy

作者: Tomokiyo Asada Tatsunori Munesada Toshikatsu Sonoda Yoshiaki Takasaki

作者单位: Kinki University School of Humanity-Oriented Science and Engineering Kinki University School of Humanity-Oriented Science and Engineering 11-6, Kayanomori, Iizuka-city, Fukuoka Institute of Technology

会议类型: 国际会议

会议名称: The International Conference on Electrical Engineering 2009(2009 电机工程国际会议)

会议地点: 沈阳

会议语种:英文

页码: 1-5

在线出版日期: 2009-07-05（万方平台首次上网日期，不代表论文的发表时间）