Double voltage rectifier circuit
Source: InternetPublisher:狂妄火龙果 Keywords: Rectifier circuit voltage doubler rectifier BSP diode Updated: 2020/12/02
In practical applications, when a high-voltage, low-current DC power supply is required, a voltage doubler rectifier circuit is often used. The voltage doubling rectifier circuit can obtain a higher DC voltage output through multiple voltage doublings without
increasing the number of turns of the secondary winding of the transformer and the reverse peak voltage of the diode
.
(1) Circuit structure The double voltage rectifier circuit consists of a power transformer, two diodes, and two
capacitors. Its structure is as shown in the figure.
(2) The working principle is in "the positive half cycle of 2, the diode VD1 is forward-biased and turned on. VD2 is reverse-biased and turned
off. The current passes through the diode VD1 and charges the capacitor C1 with the right positive and left negative voltage Ucl." . Basically
close to the peak voltage of ground, that is, H. ,≈f/U2.
In her negative half cycle, diode VD2 is forward-biased and turned on, and VD1 is reverse-biased and turned off. Since
Yao and Ucl are in the same direction at this time, they are connected in series to charge 6 with the right positive and left negative voltage M,
making the voltage at both ends of Cz approximately equal to 2fiUz. After multiple cycles of charging, the voltage across C2 can be equal to 2.~Uz.
It can be seen from the analysis that in the double voltage rectifier circuit , the maximum reverse voltage endured by each diode
is 2 JZUz;
the voltage across the capacitor CJ is f/Uz; the voltage across the capacitor Cz is 2f/Uz. In this way, under load Ri. You can get it from both ends:
Uo—2JEU2
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