Inverter electric resistance welding constant current intelligent control method

• Main Authors: Hu Songming, Liu Xueming, Xu Mingxiang, Liang Juehong, Li Meiqing
• Format: Patent
• Language: Chinese; English
• Published: 24.08.2016
• Subjects: CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

The invention discloses an inverter electric resistance welding constant current intelligent control method, which adopts a dsPIC33 digital signal controller as a controller of a system, wherein the controller runs a constant current intelligent control algorithm, performs closed-loop control on an IGBT full-bridge inverter circuit by means of a current feedback signal detected through secondary side rectification, divides a control process of constant current output into three phases of start control, mid-term control and stable control, and the controller can adjust corresponding control rules and control parameters according to error magnitude and change directions of output current, thereby achieving constant current intelligent control. The inverter electric resistance welding constant current intelligent control method is simple in control rules and structure, does not rely on a mathematical model of an object, and can achieve effective control when features such as nonlinearity, time-varying uncertaint