| 摘要 |
The present invention relates to a protective bridge rectifier circuit comprising: an alternating current transformer; an alternating current input stage which includes an input alternating current anode and an input alternating current cathode; a direct current output stage which includes an output direct current anode and an output direct current cathode; a rectification diode which is installed between the alternating current input stage and the direct current output stage; an input stage two-way transient voltage suppression tube; and an output stage two-way transient voltage suppression tube, wherein the alternating current input stage is electrically connected to a secondary winding of the alternating current transformer, the input stage two-way transient voltage suppression tube is integrated between the input alternating current anode and the input alternating current cathode, and the output stage two-way transient voltage suppression tube is integrated between the output direct current anode and the output direct current cathode. As compared with the prior art, according to the present invention, two output stage two-way transient voltage suppression tubes are integrated to the input stage and the output stage of the bridge rectifier circuit, respectively, it is possible to protect the bridge rectifier so it is not affected by input power surge, and it is possible to protect the downstream load circuit to avoid damage from an influence of upstream surge noise. |
