Double voltage rectification circuit: Using the storage function of the filter capacitor, the output voltage of several times the voltage of the secondary side of the transformer can be obtained by a plurality of capacitors and diodes, which is called a voltage doubler rectifier circuit. The circuit is shown below.
The working principle of double voltage rectifier circuit
★ When u2 is half-cycle, the voltage polarity is as shown in the figure, D1 is turned on, D2 is turned off; C1 is charged, the current direction and the voltage polarity on C1 are as shown in the figure, and the maximum voltage of C1 is reachable.
★ When u2 is negative for half a week, the voltage polarity is as shown in the figure, D2 is turned on, D1 is turned off; C2 is charged, the current direction and the voltage polarity on C2 are as shown in the figure, and the maximum value of C2 voltage is reachable.
It can be seen that the storage of the charge causes the output voltage (ie, the voltage on C2) to be twice the voltage of the secondary side of the transformer, and the same principle can be used to achieve the desired multiple of the output voltage.
Multi-voltage rectifier circuit works
As shown in the above figure, the multi-voltage rectifier circuit is obtained. According to the above analysis method, the voltage on C1 is the voltage on C2 to C6. Therefore, the value of the output voltage is taken as the output end of C1; the value of the output voltage is taken as the output end of C2; the voltage is added as the output on C1 and C3, and the value of the output voltage is... This type of push, output from different positions, can get 4, 5, 6 times the output voltage.
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