SU1439555A1 - D.c. voltage stabilizer - Google Patents

Abstract

The invention relates to sources of secondary power supply for radio electronic equipment. The aim of the invention is to reduce the weight and size. The input current, flowing through the primary winding 11 of the transformer 1, made on the cores 4, 5, 8 and 9, floods in the secondary winding 6 voltage. The secondary winding voltage is controlled by the rectifier 2 and is fed to the output terminals and the input of the regulator 3, which sets the current in the control winding 10 of transformer 1. This current, flowing through the current sensor 12, controls the conductivity of the transistors 13 and 14, which additionally increases output voltage stability. The current sensor 12 is made on a diode, which allows to ensure the inclusion of an additional loop for regulating the output voltage only at low load currents. 1 3, p. f-ly, 1 silt, (L

Description

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The invention relates to electrical engineering and can be used in converters of alternating voltage to constant and regulators of electrical power}.

The aim of the invention is to reduce the mass and gaba of Mlc. The drawing shows a diagram of a DC voltage regulator.

The DC voltage regulator contains a transformer 1, rectifier 2, regulator 3 voltage S main cores 4 and 5, the output winding 6 of transformer 1, f5 connected to the rectifier 25 winding 7 bias, auxiliary cores 8 and 9, with a control winding 10 connected to the V output of the regulator 3, the input connected to the output of the rectifier 2, the primary winding 11 of the transformer 1, the current sensor 12, the transistors 13 and 14, the resistors 15-17 , at the same time the primary winding 11 is connected to the input terminals 25, the winding 7 is magnetized Connected to the output of the rectifier 2 through the resistor 17 and the transistor 14, the base-collector junction is shunted by the resistor 16, the winding control winding 10 through the current sensor 12 is connected to Е1Ы- of the regulator 3, and in parallel the sensor 12 through the resistor 15 is connected the base-emitter of the transistor 13 connected by a collector to the trans- base. 14,

The device works as follows.

When voltage is applied to the primary winding 11 of transformer 1 in 40 cores 4, .5, 8 and 9, a magnetic flux is created which induces an emf on winding 6, which flushes, smoothes and applies to the load and regulator 3. Regulator 3 depending on - the AC bridges from the deviation of the output voltage value changes, the current in the winding is 10 tons. When the control current in the winding 10 changes, the voltage on the sensor 12 changes. This voltage is controlled by the transistors 13 and 14, and the bias current in the winding 7 changes, which additionally regulates the output voltage. For example, as the output voltage increases, the current in the winding 10 decreases, the transistor 13 closes, and the transistor 14 opens, increasing the flow current.

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winding 7, which further reduces the output voltage zo of the original value.i

As a rule, in case of a continuous load or a change in a sufficiently wide range, the action of the winding 7 is optional. Under low loads or during idling, the output voltage may increase dramatically. Therefore, winding 7 should come into operation. Dp this goal as a current sensor, it is preferable to use a diode. Then at low loads the current in the winding 10 will be close to zero. The transistor 13 will close and the transistor 14 will open, increasing the bias current in the winding 7, which will reduce the output voltage. In other modes, the transistor 13 is open, and the transistor 14 is closed and power is not consumed.

Thus, the introduction of additional transistors and resistors reduces the size and weight of transformers, and hence the entire device. Using a diode as a current sensor will allow stabilizing the output voltage of a stabilizer only at low loads and idling (which is not a boiling mode), disconnecting the bias winding under other modes, which leads to a decrease in the power of the control circuits, and, consequently, to additional power reduce the weight and size of the transformer.,.

Claims (2)

1. A DC voltage regulator containing a transformer, the primary winding of which is connected to the input terminals, a rectifier connected between the output winding of the transformer and the output terminals, a voltage regulator, a connection input to the output of the rectifier, and the transformer magnetic core made on two main cores with a secondary winding and a magnetizing winding and two auxiliary cores with a control winding, and the primary winding covers all the cores, characterized in that spruce reduce weight and dimensions, it is further introduced current sensor, two transistors, and 31439555. three resistors, and the winding is controlled by the second resistor, with The output voltage is connected to the output by a regulator; the bias current is connected via a current sensor; it is parallel connected through a serially connected current sensor through the second transistor and the third resistor to the output of the rectifier, the first transistor, and the collector to 2. The stabilizer according to claim 1, about the second transistor connected to the base, that the current sensor ra, the base-collector transition is made on the diode.