Voltage zero crossing point detection method and device, detection circuit and storage medium

• Main Authors: KONG JIEYING, YU KUN, ZENG XIANGUANG, WANG TONG, SHAO TIANYONG, ZENG YONGJIAN, TANG JIANJIE
• Format: Patent
• Language: Chinese; English
• Published: 25.06.2024
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a voltage zero crossing point detection method and device, a detection circuit and a storage medium. The method comprises the steps that at least three voltage sampling values are obtained, the voltage sampling values are voltage values obtained after sampling operation is carried out on target voltage, and the target voltage refers to voltage obtained after rectification operation is carried out on alternating voltage; judging whether the change trend of the target voltage is a target change trend or not based on the at least three voltage sampling values; the target change trend represents that the target voltage changes from a decreasing trend to an increasing trend; and under the condition that the change trend of the target voltage is the target change trend, determining the zero crossing point moment of the AC voltage based on the switching moment when the target voltage is changed from the decreasing trend to the increasing trend. The control module receives a voltage sampling v