SU1245563A1 - Dc voltage regulator - Google Patents

Description

The invention relates to electrical engineering and can be used in power supply devices with pulse power consumption.

The purpose of the invention is to increase the reliability of the stabilizer when operating on a pulsed load in a mode with high current efficiency.

The drawing shows a constant voltage stabilizer circuit.

The DC voltage regulator contains a regulating element 1 connected in series to the power bus, a source 2 of the reference voltage, the output of which is connected to the input of a DC amplifier 3 connected by the output to the input of a modulator 4 of duration connected by the second input to the input of node 5 protection consisting of a current sensor 6 and a transistor 7, the output of the protection node is connected to the input of the delay circuit 8, the second input of which is connected to the input of the output filter 9, node 10, control current correction, consisting of transistor 11, condensation torus 12, resistor 13 and diode 14 and connected by an input to the output of the protection node, and outputs to the output of the modulator 4 of duration and regulating element 1, resistor 15 connected between the control input of regulating element 1 and the output of controller 4 of duration and the resistor 16 is connected between the output of the modulator 4 duration and the common output.

At load currents not exceeding the level of operation of the protection node 5, the circuits of nodes 5, 8 and 10 do not affect the operation of the device. The specified output voltage level at terminals 17 and 18 is supported by the control circuit by acting on the regulating element of the capacitor, the operating mode of which in this case is determined by the DC amplifier circuit under the influence of the error signal between the output and the reference voltage. If, on the other hand, the load current triggers the protection unit 5, then its effect on the operation mode of the duration modulator and through it on the regulating element is delayed by the delay circuit 8, which allows

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of that time, to carry out an increased level of current transmission. However, the stability of the output parameters is not guaranteed; with increasing current through the regulating element, it can be switched to the amplified mode.

To prevent this, simultaneously with the unlocking of the protection transistor 7, the diode 14 and the capacitor 12 through the base of the additional transistor 11 receive a current pulse, which opens it. The open transistor 11 forms an additional channel for the control current of the regulating element at the time of the increased current transfer, thus ensuring its saturation at the moments of its open state and maintaining the output parameters of the stabilizer. After the passage of the overload pulse, the capacitor 12 is discharged through the high resistor 13, after which it is ready to pass the next pulse.

Thus, the main advantage of the proposed scheme in comparison with the known overcurrent protection devices is its ability to provide a high level of current transfer in a pulsed mode without degrading the output parameters and a static mode in a low load area of approx.

Claims (1)

Invention Formula A DC voltage regulator containing a regulating element connected by a power input to the input terminal and a control input through a resistor to the output of a duration modulator connected by an output through a resistor to the common output, and the first input to the output of a DC amplifier connected power inputs to the input terminal and to the common output, the first input to the output terminal, the second input to the output of the reference voltage source connected by the power inputs to the input terminal and to the common output, output filter, wired by the outputs to the output terminal and to the common output, and the first input is to the first input of the delay circuit connected by the output to the third input of the dc amplifier, protection node, joint 3 12455634 the current of the transistor and the current sensor, injected into it ka, with the current sensor the first output node of the pulse correction control is connected to the power output of the resistive current of the control element, of the oscillating element, to the second inlet state of the ptsad from the transistor, diode, terminal of the modulator of the duration, to the second-5 of the capacitor and resistor, with the input filter of the output filter and the Bazistor connected to the power terminals transistor connected to the control input of the regulating rum to the first input of the output filter element and to the output of the modulator of the length and the second output of the current sensor, efficiency, and the control input of the collector to the second input of the circuit to the first combined pins of the resistor, different from the torus and the condenser, increase reliable outputs of which through the diode of the stabilizer level during operation are connected to the collector of the transistor impulse load in the mode from the protection point.