SU499561A1 - Compensation voltage regulator - Google Patents

Description

one

Compensatory voltage stabilizers are known, which contain a regulating element, an amplifying transistor, a direct current amplifier (DCA), two input voltage sources and a voltage source.

A disadvantage of the known stabilizers is the presence of an additional protection resistor connected in series with the load, which leads to a deterioration of the stabilizer parameters.

To protect against short circuits and improve the stabilizer parameters in the proposed device, the power supply terminal is connected to the output of one of the input voltage sources via an additional transistor, the emigrant of the latter being connected by the upper arm of a voltage divider on the resistors, the midpoint of which is connected to the base of the amplifying transistor, the lower leg is with a common point, the emitter of the amplifying transistor is connected to the output of the stabilizer, and the collector is connected to the base of the additional transistor and with a load resistor, the second output of which is connected to the input voltage source and the collector of the additional pass-through transistor.

The drawing shows a schematic diagram of the described stabilizer, comprising a stabilizer output 1, a common point 2, an amplifying transistor 3, an additional pass-through transistor 4, a DCA 5, a main pass-through transistor 6, a source of reference

voltage 7, voltage divider 8, load resistor 9, input voltage source 10, 11.

The operation of the stabilizer is carried out as follows.

If, as a result of the short circuit, the potential of output 1 becomes equal to the potential of common point 2, then transistor 3 becomes saturated, and the potential of its collector becomes equal to the potential of the emitter. This change is transmitted to the emitter of the additional pass-through transistor 4 and, therefore, the power output of the DCF 5 is supplied with a voltage close to the potential of common point 2. The main transistor 6 is closed on the base-emitter junction, and the short-circuit current decreases to almost zero. When a short circuit is removed, the original circuit mode is restored automatically.

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formula of invention

A voltage compensator, 30 containing two input voltage sources, one of which is connected to the stabilizer through a serial control element, is connected through a control circuit to the output of a direct current amplifier, one of the inputs of which is connected to the common point of the stabilizer, output voltage divider and amplifier transistor, characterized in that, in order to protect against short circuits and improve the parameters of the stabilizer, the power output of the constant amplifier current is connected to the output of the second input voltage source through an additional pass-through transistor, the emitter of the latter is connected to the upper shoulder of the voltage divider resistors, the midpoint of which is connected to the base of the amplifying transistor, and the lower shoulder to the common point, the emitter of the amplifying transistor is connected to the output the stabilizer, and the collector - with the base of the additional pass-through transistor and with the load resistor, the second output of which is connected to the second input voltage source and to the collector yell an additional transistor.

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