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http://dx.doi.org/10.5370/KIEE.2015.64.11.1571

Mixed Mode Control of Constant Power and Constant Current for Resistance Spot Welder using Dynamic Resistance Characteristics  

Kang, Sung-Kwan (Dept. of Electrical Engineering, Pukyong National University)
Jung, Jae-Hun (Dept. of Electrical Engineering, Pukyong National University)
Nho, Eui-Cheol (Dept. of Electrical Engineering, Pukyong National University)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.64, no.11, 2015 , pp. 1571-1577 More about this Journal
Abstract
A new mixed mode control of constant power and constant current for resistance spot welding inverter is proposed to improve the weld quality. The conventional control scheme adopts constant current or constant power control mode, however, it is not easy to guarantee the high weld quality because of the nonlinear resistance characteristics of the welding point. The proposed method utilizes the nonlinear characteristics by measuring the dynamic resistance in real time. Therefore, it is possible for the welder to be controlled adaptively depending on the welding state. Experimental results show that the proposed control scheme improves the weld quality by 6.8 times compared with the conventional constant current mode control.
Keywords
Dynamic resistance characteristics; Weld quality; Constant current and power control;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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