【摘要】 通过理论分析,推导出交流电阻点焊电流有效值实时计算方程,建立了不同功率因数角的电流有效值系数K的神经网络计算模型,研究出电阻点焊电流有效值神经网络实时计算方法。在以DSP为核心的电阻点焊测控系统中实现了交流电阻点焊电流有效值实时计算。理论分析和实际检测表明,该方法的检测误差小于±0.9％,并且能够在二分之一周期内完成电阻点焊电流有效值的检测和计算。该方法的研究为电阻点焊质量的精确控制提供了可靠的保障。更多还原

【Abstract】 It is educed the calculating equation of the current’s virtual value, and it is erected the ANN calculating model of K and the calculating method of the current’s virtual value in different power factor angle during the alternation resistance spot welding. The current’s virtual value is calculated in real time in the control system of resistance spot welding based on DSP used this calculating model. The error analyzing and actual test result show, the error of this method is less than ± 0.9%,and measuring and calculating the current’s virtual value can be completed in half a cycle. This method ensure precision control of quantity during the alternation resistance spot welding.更多还原