A SWITCH POWER SOURCE CYCLE BY CYCLE OVERVOLTAGE PROTECTION CIRCUIT

摘要

the present invention is a type of switch on of the power frequency over-voltage protection circuit as, a thyristor (SCR), a constant voltage diode ( Zener Diode) (TVS), a first register (Register) (R1), a second resistor (R2), comprises a second diode (D2) and a second capacitor (Capacitor) (C2) and, of the thyristor (SCR) the positive electrode and the AC input terminal (ACIT) are connected to each other, the negative electrode and the lower part (LDT) are connected to each other, gate (Gate) of the constant-voltage diode (Zener Diode) (TVS) and the thyristor cathode (SCR) are each are connected and a constant voltage diode (Zener Diode) cathode of (TVS) are respectively coupled to the first resistor in parallel mutually connected (R1) and second resistor (R2), the first resistor (R1) is directly exchange they are connected with the input terminal (ACIT), and a second register (R2) is a constant-voltage diode (Zener Diode) (TVS) and reverse connected diode and a second (D2) that is installed on, AC input terminals (ACIT) and are connected to each other a second capacitor (Capacitor) (C2) is a thyristor (SCR) and the constant voltage diode cathode (Zener Diode) (TVS) is connected between the cathode and the load input (LDT) and the load Zidane (LDGT) between the first capacitor ( Capacitor) (C1) characterized in that is connected. ;