RU1798774C - Direct current stabilizer - Google Patents

Abstract

Usage: in DC networks when developing secondary power supplies for various devices, including highly reliable on-board power supply devices. The inventive stabilizer contains a regulating body 1, including N + K of the same type of additional boost cells 2, a control unit 3, a switch 4, including two control electronic keys 5 and 6, a filter 7, the introduction of the switch 4 allows receiving at the output stabilizer voltage is either lower or higher than the input. 1 ill.

Description

The invention relates to the field of voltage regulation and stabilization in DC networks and can be used in the development of secondary power supplies for various devices, including highly reliable on-board power supply devices.

The purpose of the invention is to expand the functional capabilities of the stabilizer, which consists in obtaining at the output of the stabilizer both a higher and a lower voltage than the input voltage.

The drawing shows a functional diagram of a DC voltage stabilizer.

The stabilizer consists of a regulator 1, which includes N main and K redundant cells of the same type 2, each of which contains a transformer at the output, the magnetic circuits of which are connected by a common winding with the middle output connected to the input voltage source, the control inputs of the cells are connected to the control device 3 , and the power inputs of the cells to the output of the stabilizer, from the control device i which is connected to the filter 7, the output of the stabilizer and the control inputs of the switch 4, consisting of two controls Mykh electronic switches 5 and 6, power switch inputs 4 connected to the extreme terminals Regulator common coil 1 and its outputs connected to a filter 7, and the output of the stabilizer. .

The regulator 1 is designed to form, with the same type of boost cells 2, the required additional voltage between the voltage of the primary source and the desired stabilized output voltage.

The control device 3 is designed to turn on the required number of the same type of boost cells 2 and for

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closing or opening in a corresponding increase or decrease in voltage depending on the voltage at the output phase of the switch 4,

Switch 4, consisting of two controlled electronic keys 5 and 6, is designed to connect one of the two extreme terminals of the common winding to the filter and the output of the stabilizer.

Filter 7 is designed to reduce output voltage pulsations.

The constant voltage stabilizer operates as follows.

If the input voltage is equal to the rated output voltage, the control device 3 acts on the same type of boost cells 2 of the regulatory body 1 so that they are all disconnected, and so on the controlled electronic keys 5 and 6 of the switch 4, so that one or both of the keys are open. In this case, the input voltage through one or both half windings of the output transformers of the same type of boost cells 2 and one or two open controlled electronic switches 5 and 6 is supplied to the filter 7 and to the output of the stabilizer. Thus, the rated voltage is set at the output of the stabilizer.

When changing the input voltage or changing the output voltage for some reason (for example, when changing the load resistance), the control device 3 includes the necessary number of basic homogeneous electrolytic cells 2, which during synchronous and common mode operation are induced in both half windings of the output transformers the same type of boost cells 2 of the regulatory body 1 is a rectangular variable voltage compensation, and at the first extreme output of the common winding of the regulatory body 1 is a rectangular a belt voltage compensation each first positive half cycle, every second half - in the negative, and in a second extreme withdrawal common winding opposite - each first half cycle of negative, positive half cycle of every second since the counter poluobmotki included. The control device 3 acts on the controlled electronic keys 5 and 6 of the switch 4 so that every first half-cycle the controlled electronic key 5 connected to the first extreme terminal of the common winding of the regulatory body is open, and every second half-cycle is closed, while the controlled electronic key 6 connected to the second extreme

the output of the common winding of the regulator 1, every first half-cycle is closed, and every second half-cycle is open - if the output voltage has decreased for some reason and a positive compensation voltage is required to maintain the rated output voltage. If the output voltage for some reason has increased, and for

In order to maintain the rated voltage at the output of the stabilizer, a negative compensation voltage is required, then, on the contrary, the controlled electronic switch 5 is closed every first half cycle and every second half cycle is open, while the controlled electronic switch b is opened every first half cycle, and every second half-cycle is closed. Since there is no pulse-width compensation modulation voltage in this case, the rectified voltage has a small ripple value, which can be almost completely suppressed using a small capacitive filter. The accuracy of maintaining the compensation voltage is determined by the output voltage of the same type of cell 2, In the event of a failure of one working of the same type of boost cell 2, the voltage at the load changes, therefore, the control device will turn on another unused, of the same type of voltage field cell 2 and the voltage at the output of the stabilizer will become equal to the nominal value. Thus, the functions of stabilizing the output voltage and replacing faulty homogeneous boost cells 2 are combined in one device. For the normal disconnection of the faulty same type of auxiliary cells 2 from the power circuit, they are connected via fuses. The stabilizer fully maintains operability upon failure of the K of the same type of boost cells 2,

5 With subsequent failures of the same type of boost cells 2, the permissible range of variation of the output voltage is narrowed, or the stabilization error increases with the previous range.

The technical and economic efficiency of a constant voltage stabilizer with respect to the prototype is expressed in the possibility of obtaining at the output of the stabilizer both higher and lower

Ј voltage than the input, which allows reducing to half the total required number of cells of the same type (and, as a result, significantly improving the weight and size characteristics of the stabilizer) while maintaining the same error

stabilization or reduce to half the value the error of stabilization with the same number of the same type of boost cells.

Claims (1)

The formula of the invention is a constant voltage stabilizer shade containing a regulating body consisting of N primary and K redundant homogeneous boost cells, the power inputs of which are connected to the output terminals, and the control inputs are connected to the corresponding outputs of the control unit, the input connected to the output terminals where the filter is also connected, each of these cells contains an output transformer, and the magnetic circuits of all transformers are covered by a common secondary winding, the middle terminal of which is connected to the potential th input terminal, characterized in that, in order to expand the functional capabilities, zaklyuchayuschihs to obtain at the output of the stabilizer as a higher and a lower voltage than the input, it is provided with a switch consisting of two electronic switches actuated, police the inputs of which are connected to the extreme terminals of the common secondary winding of the output transformers of the same type of boost cells, the control inputs of controlled electronic keys are connected to corresponding outputs of the control unit, and the power outputs are connected to output-. conclusions. REGULATORY ORGSH.  -3Jr y-i- input OPTIONS CELLS DEVICE agta / sh Claw t 5 .G 7 Benefits