Analog acquisition lightning protection circuit

• Main Authors: GUO BAOHUI, HAO QIWEI, LIANG FAJIN
• Format: Patent
• Language: Chinese; English
• Published: 21.02.2020
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION

The invention provides an analog acquisition lightning protection circuit, which comprises a front-end lightning protection circuit, an optical coupler isolation circuit, and a filtering and voltage stabilizing circuit. The front-end lightning protection circuit suppresses an instantaneous high voltage through a TVS (Transient Voltage Suppressor) tube and prevents the instantaneous high voltage from damaging a rear-end circuit, so as to improve the accuracy and stability of voltage division. The optical coupler isolation circuit realizes electrical isolation. An output signal of the optical coupler isolation circuit is subjected to voltage division and filtering, passes through a follower circuit and is subjected to voltage stabilizing and filtering by the voltage stabilizing circuit, andfinally, an analog acquisition output signal is output. According to the analog acquisition lightning protection circuit, the high-power requirement of the lightning protection circuit on the TVS tubeis met, and the cost is s