SU1539931A1 - Bipolar source of dc voltage - Google Patents

Abstract

The invention relates to electrical engineering and can be used in the composition of the secondary power supply sources. The purpose of the invention is to increase efficiency. In the device, two loads 20, 21 are supplied with alternating constant voltage. The introduction of additional diodes 18, 19 made it possible to reduce the power of the rectifier by 25%. A variant of the device is also proposed, in which the rectifiers 4, 5 are made according to a full-wave scheme with a midpoint. 2 Il.

Description

FSh.1

The invention retracts to electrical engineering n can be used in the composition of the sources of secondary power supply,

The purpose of the invention is to increase K1SC.

FIG. Figure 1 shows the electrical circuit of a two-pole DC voltage source in the case of rectifiers in a bridge circuit; in fig. 2 is a diagram of a two-pole source of constant voltage in the case of making rectifiers according to a two-half-period scheme with a midpoint.

The source contains a power transformer 1 with primary and two secondary windings — 2 and 3.

The secondary windings 2 and 3 in the circuit of FIG. 1 are connected to two-half-bridge bridge rectifiers 4 and 5, made on diodes 6–9 and 10–13, respectively. The secondary windings 2 and 3 in the circuit of FIG. 2 are connected to rectifiers 4 and 5 on diodes 14,15 and 16,17, respectively. Diodes 18 and 19 connect the beginning and the end of the winding 3 with: the end and the beginning of the winding 2. Raenonol ral conclusions of the rectifiers 4 and b are combined to form a common output output.

The free opposite-pole outputs of the rectifiers 4 and b form positive and negative output terminals for connecting the loads 20 and 21.

The proposed two-pole source of constant voltage works in a summary way.

In a positive iolupe period and in the scheme of FIG. 1 current flows through the circuit: the beginning of the second secondary winding 3, diode 19, the end - the beginning of the first secondary winding 2, diode 6, series-connected loads 20 and 21, diode 11, the end of the second secondary winding 3.

In the scheme for flash. 2 current flows through the circuit: the beginning of the second secondary winding 3, diode 19, the end is the middle terminal of the first ground winding 2, the loads 20 and 2 1 are connected in series, the middle terminal of the second secondary winding 3.

Q 5

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five

In the negative iolupode in the circuit of FIG. 1 current flows at the following values: the end of the second secondary winding 3, diode 18, the beginning is the end of the first secondary winding 2, the diode 7, series-connected loads 20 and 21, the diode 10, the beginning of the second secondary winding 3, and in the circuit of FIG. 2 - along the circuit: the end of the second secondary winding 3, diode 1B, the beginning is the middle terminal of the first secondary winding 2, series-connected loads 20 and 21, the middle terminal of the second secondary winding 3.

From the current paths, it can be seen that in the circuit of FIG. I for two loads, the voltage is lost on three diodes; in the circuit of FIG. 2 for two loads, the voltage is lost on one diode.

In the known circuit, the voltage is lost, respectively, on four and two diodes.

Thus, in comparison with the known d the proposed two-pole voltage source, the voltage drop and the dispersal distribution of the rectifiers are reduced by 25% in the case of rectifiers in the bridge mode (pa. 1) and pa 50 "in the case of performing rectifiers according to a two-half-full scheme with an average τ of a point (ip. 2).

F o rm v l a and s gain

The bottom of the direct current source of voltage, the contents of the power transformer, is primary to which forms the input pynods, and each of the two secondary is connected to the corresponding (it has a single floor - | rectifier, one razpolparnnye nvoddy which are combined and kp is a common output pin, and other opposite-polarity pinpoints form positive and negative output pinpoints, about one case and two, additionally, two diodes are introduced, the first secondary winding with the end and the beginning Biopmmoii second winding and included one-legged rule.

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Claims (1)

technology and can be used as part of secondary power sources. The purpose of the invention is improving efficiency. The device is powered by two loads of 20.21 bipolar constant voltage. The introduction of additional 18.19 diodes made it possible to reduce the dissipation power of the rectifier by 25 ". A variant of the device is also proposed in which the rectifiers 4,5 are made according to a half-half-wave circuit with a midpoint.