The measuring principle and circuit for the power factor in high current switching test of AC apparatus have been improved by making up FPGA and pushing on phase and investigates when the DFT switched on.

• 研究了采用FPGA芯片,利用智能化相位前推原理和离散傅里叶变换相结合来实现提高交流电器强电流通断试验功率因数和相位角测量准确度的原理和测量线路。