SU1293719A1 - Stabilized d.c.power source - Google Patents

Abstract

The invention relates to electrical engineering, in particular to sources of secondary power supply. The purpose of the invention is to increase efficiency. Due to the introduction into the device of a circuit of PS, the auxiliary rectifier on diodes 3,4, current limiting droplets 5 and low-pass filter 6, forming together with the source 9 a current source, in the process of operation displaces part of the current of the voltage regulator 1 with low efficiency power source with high efficiency. The increased efficiency of the current source is determined by the fact that active power is not dissipated on the choke 5. 1 il. yu (L

Description

The invention relates to electrical engineering and is intended for use in the power supply of electronic equipment.

The purpose of the invention is to increase the K11D of a stabilized source of direct current power.

The drawing shows a functional diagram of the proposed device.

The stabilized DC power source contains a series voltage regulator 1, a power supply terminal 2 (with filter), auxiliary rectifying diodes 3 and 4, a current limiting choke 5, a low-pass filter 6. Positions 7 and 8 in the diagram designate the device inputs for connecting the primary source 9 of the AC power, and positions 10 and 11 for the output terminals of the device for connecting the load 12. The power input terminal is connected to the input terminals 7, 8 of the device . . The input of the voltage regulator 1 is connected to the output of the power rectifier 2, and the output to the output pins 10, 11 of the device. The extreme terminals of the current-limiting droplets 5 through the auxiliary capacitance diodes 3, 4 are connected to the input terminals 7, 8 of the stabilizer. The input potential output of the low-pass filter is connected to the average output of current-limiting chokes 5, and the output potential and general outputs - with the output pins 10 and 11 of the device

The device works as follows.

The current in load 12 is folded into two components; current of voltage regulator 1 and current of the circuit including source 9, diodes 3 and 4, choke 5 and filter 6. Stabilizer 1 is the voltage source, and the specified circuit is the current source. The switching direction of the diodes 3 and 4 is chosen such that the current from this circuit is provided with the same sign as from voltage regulator 1.

The voltage on load 12 is kept stable due to the effect of voltage regulator 1. Formed current source provides increased efficiency of the device for

by the addition of the choke 5, the active power of the throssel condition;

that no current is dissipated on the current limit, the magnitude of the induction is 5 selected from

About i

CS tt

where 1 „

“Stl.

- rated load current 12,

- instantaneous value. current received from the current source.

During operation of the device, a part of the current of the voltage regulator 1 is displaced with low efficiency by the current of the current source with high efficiency. This leads to an increase in the efficiency of the entire device, which, provided that the efficiency of the rectifier 2, diodes 3 and 4, droplets 5 and filter 6 is 100%, is:

fj

t + t

-

H - voltage stabilizer 1,

  the ratio of the current flowing through the voltage regulator 1 to the current flowing through the load 12.

The use of low-pass filter 6 causes a decrease in the current ripple from the current source. This also makes it possible to increase the efficiency of the device with the same maximum values of the current received from the current source. Filter 6 must be made throttle-capacitor and

have minimal losses, t

The choke 5 is performed on a ferromagnetic core to obtain a strong connection between the half windings. The absence of a connection between the semi-windings can lead to the fact that each of them is a filter of their frequencies, connected to the output of a one-half-cycle rectifier, and not as a current-limiting inductance in the AC circuit. . The magnitude of the reactance of the chokes 5 is chosen from the condition that when the stabilizer 1 is turned off, the voltage amplitude in the undercut 12 is less than the nominal value of the stabilization voltage.

312937194

Claims (1)

The invention claims that, in order to increase the level of HF, into it Two auxiliary rectifiers were introduced. A stabilized power supply source for the current-limiting or direct current diode containing a choke and a lower filter, a feeder rectifier whose input is connected to the outer leads of the device throttle through Auxiliary voltages for connecting the power diodes are connected to the primary power source to the input pins, the input potential current, the serial stationary output of the low-pass filter a voltage biliser, the input of which is JOINEN with the average output of the current limit is connected to the output of the power output of the selective throttle and the output carrier, and the output - with the output output — the potential and the general output - with the outputs differing from conclusions.