交流电源过零点检测新方法

New Method of Zero-crossing Detection for AC Power Supply

针对目前交流电源过零点检测电路过于复杂或过零点检测不准确的问题,提出了一种新颖的过零点检测方法。该方法以微处理器为核心,利用光耦和微处理器的输入捕获中断功能实现对交流电源过零点的精确检测。该方法在工业现场进行了多次测试,测试结果证明该方法具有较高的可靠性、准确性,为解决交流电源的过零点检测问题提供了新的思路和设计参考。

In order to solve the problem of the complex and the inaccurate in the zero-crossing point detection of the AC power supply, a novel method of zero-crossing point detection was proposed. The micro-controller is the key part of the solution, the optical coupler and the capture interrupt function of the micro-controller was adopted as to have a accurate detection of the zero-crossin g point of the AC power supply. By testing in the industrial filed, it proved that this method has high reliability, accuracy, and it re- solves the problem of the zero-crossing point detection of the AC power supply in a new way of thinking and design.