Two voltages from one winding of the transformer. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Voltage converters, rectifiers, inverters
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Sometimes it is necessary to get double the voltage in an existing power supply. If the rectifier is made according to a half-wave circuit or the transformer has a secondary winding with a tap from the middle, then the solution of the problem does not cause difficulties for the radio amateur. But what if the rectifier is assembled in a bridge circuit? How to get double the voltage in this case is shown in fig. 8.2.
A positive voltage half-wave through diode V5 charges capacitor C2, and a negative one charges capacitor C3 through diode V1, a common wire and capacitor C2. As a result, the voltage across the capacitor C3 will be equal to twice the rectified voltage.
When choosing diodes, you need to take into account that the load current of both the main rectifier and the additional one will flow through the diode V1.
Author: Semyan A.P.
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