PL172058B1 - Current stabilizing circuit in particular for pulse-type voltage regulators - Google Patents

Abstract

Current stabilization system, especially for pulsed voltage stabilizers, characterized in that a pulsed voltage stabilizer (ISN), the third of which input (in3) is connected to its second output (wy2) and simultaneously with the mass (Uo) of the system is attached to the first input of the circuit (In1), and to the second input of the chip (In2) is connected operating voltage stabilizer (OSN), the second input of which (in2) and the second output (out2) are connected to each other and simultaneously via a resistance element (RS) also with the mass (Uo) of the system with which through the load (ZO1) and resistive element (RS) is also included first output (off) of the pulse stabilizer connected voltage (ISN), and through a voltage divider (RD) 1 resistance element (RS) first the output (off) of the operating voltage stabilizer (OSN), the center of the voltage divider (RD) is connected to the second pulse input (in2) voltage stabilizer (ISN).

Description

The subject of the invention is a current stabilization system, especially for impulse voltage stabilizers used most often in an electromagnetic power supply.

The current stabilization circuits known so far are built mostly on integrated circuits and use the linear characteristics of power transistors. This is done by changing the base current of the transistor in the feedback circuit formed by a resistor located at the output of the voltage stabilizer.

In known voltage stabilizers, which can work as current stabilizers, the voltage is stabilized on the current-sensitive element, where the voltage drop is equal to the stabilizer reference voltage.

The disadvantage of the known solutions is low efficiency and high power losses, especially with a large input-output voltage difference.

The circuit according to the invention is distinguished by the fact that the pulse voltage stabilizer, the third input of which is connected to its second output and simultaneously to the ground of the circuit, is connected to the first input of the circuit. An operational voltage stabilizer is connected to the second input of the system, the second input and the second output of which are connected to each other and simultaneously, through the resistance element, also to the ground of the system, to which the first output of the pulse voltage stabilizer is also connected through the load and the resistance element, and through a voltage divider and resistive element the first output of the operational voltage stabilizer. The center of the voltage divider is connected to the second input of the pulse voltage stabilizer.

An advantageous feature of the solution according to the invention is its simple structure and the possibility of regulating the current from very low values to the maximum load capacity of the pulse voltage stabilizer.

The subject of the invention is shown in the drawing showing its block and schematic diagram.

In the system according to the invention, a pulse voltage stabilizer ISN, the third input of which we3 is connected to its second output we2 and simultaneously to the ground Uo of the system is connected to the first input of the circuit We1. A highly stable, monolithic operating voltage stabilizer OSN is connected to the second input of the circuit We2, the second input of which in2 and the second output of Wy2 are connected to each other and simultaneously with the ground of the circuit Uo through the RS current-sensitive element. With the mass of the system Uo through the first load,

172 058 in the form of an inductive element ZO1 and a resistance element RS are also connected to the first output of the pulse voltage stabilizer ISN and through the voltage divider RD and the resistance element RS to the first output of the operating voltage stabilizer OSN. The voltage divider consists of a resistor R1 and a resistor R2 matched with a reference source in the pulsed voltage stabilizer ISN. The center of the voltage divider RD is connected to the second input I2 of the pulse voltage stabilizer ISN.

The operation of the system according to the invention is as follows: stabilization of the current takes place by stabilizing the sum of the voltage drops on the resistor element RS and the constant voltage drop, thanks to the use of the operating voltage stabilizer OSN, on the voltage divider RD. The second input of I2 of the ISN pulse voltage stabilizer is the input of the error amplifier, which stabilizes the voltage drop on the RS current-sensitive resistor and thus stabilizes the current on the first load ZO1.

172 058

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Publishing Department of the UP RP. Circulation of 90 copies

Price PLN 2.00

Claims (1)

Patent claim A current stabilization system, especially for pulse voltage stabilizers, characterized in that a pulse voltage stabilizer (ISN), whose third input (in3) is connected to its second output (wy2) and simultaneously with the ground (Uo) of the system, is connected to the first input of the circuit (In1), and to the second input of the circuit (In2) there is an operational voltage stabilizer (OSN) connected, the second input (in2) and the second output (out2) are connected to each other and simultaneously with the ground (Uo) through a resistance element (RS) ) of the system, to which the first output (wy1) of the pulse voltage stabilizer (TSN) is also connected through the load (ZO1) and the resistance element (RS), and, through the voltage divider (RD) and the resistance element (RS), the first output (wy1) an operational voltage stabilizer (OSN), the center of the voltage divider (RD) being connected to the second input (in2) of the pulsed voltage stabilizer (ISN).