Voltage surge detection circuit
A surge detection and detection circuit technology, applied in the measurement of current/voltage, measurement device, measurement of electrical variables, etc., can solve problems such as damage, damage to power components, and inability to effectively protect semiconductor power components, to improve sensitivity, prevent The effect of damaging the electrical system
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[0027] Such as figure 1 As shown, the voltage surge detection circuit of this embodiment includes a rectifier circuit 1, a surge detection circuit 2, and a zero-crossing detection circuit 3. The rectifier circuit 1 is a bridge rectifier circuit and is responsible for converting AC mains into DC mains. The surge detection circuit 2 is used to detect the pulse surge of the mains voltage after rectification by the rectifier circuit 1, and the zero-crossing detection circuit 3 is used to detect the zero-crossing point of the mains. The input end of the surge detection circuit 2 and the input end of the zero-crossing detection circuit 3 are respectively connected to the rectifier circuit 1, and the output end of the surge detection circuit 2 is connected to the output end of the zero-crossing detection circuit 3.
[0028] Such as figure 2 As shown, the surge detection circuit 2 includes a positive surge detection circuit 21 and a negative surge detection circuit 22. The positive surge...
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