【摘要】 研制了以89C51为核心的单片机恒流控制系统,通过焊前检测网压有效值,对网压波动和负载功率因数角进行补偿,不断调整可控硅触发角,实现了恒热量输出。实验表明:该恒流控制器既适用于半波点焊,也适用于多波点焊。更多还原

【Abstract】 A new constant current control system of spot welding by 89C51 was designed, which used the control mode of constant quantity of heat outputting, by checking the effective value of net voltage before welding, compensating the net voltage fluctuation and the power factor angle of load and adjusting the fire angel of SCR. The result showed: this system is compliant to the half-wave spot welding,and also to multi-wave spot welding.更多还原