Power supply module output external load type identification system and method

• Main Authors: XU YINGNIAN, CAI HOUJUN, LI ZHUO, DAI FUBIN, XIA HUADONG
• Format: Patent
• Language: Chinese; English
• Published: 02.10.2020
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to a power supply module output external load type identification system and method. The identification method comprises the following steps: obtaining a load parameter detectioninstruction to control a power supply module to output a first current; collecting a first current value and a first voltage value, and obtaining a first impedance value of the load, recorded as Z1;sending a sine current instruction to the power supply module, and collecting a second current value and a second voltage value; calculating to obtain a second impedance value of the load, recorded asZ2; and comparing the first impedance value Z1 and the second impedance value Z2, if Z2 is larger than or equal to 0.9 * Z1 and smaller than or equal to 1.1 * Z1, judging that the load is resistive,if Z2 is larger than 1.1 * Z1, judging that the load is inductive, and otherwise repeating calculation. The output load line is disconnected for detection without shutdown, so that the equipment operation safety and the equipmen