SU1372309A1 - D.c. h.v. stabilizer - Google Patents

Abstract

The invention relates to electrical engineering and is used to stabilize high voltages. The purpose of the invention is to improve the weight and size characteristics. The device uses a high-frequency single-phase transformer 4 with magnetizing shunts. Under the influence of the output voltages of the master oscillator 3, the transistors 1 and 2 convert the mains voltage at the input of the transformer 4 into a square-wave pulse voltage. This voltage is converted into a constant voltage through a high-voltage rectifier 5. When the output voltage changes by an amount not exceeding the specified value of the instability of this voltage, when the supply voltage or load current changes, the feedback amplifier 7 changes the bias current in the control winding of the transformer 4 with such a sign and such that leads to stabilization of the output DC voltage in the specified range. When the bias current changes in the control windings of the transformer 4, the voltage form of the secondary winding of the transformer 4 is almost not distorted, which leads to the preservation of the variable component value at the output of the device. 1 il. c & (L

Description

Overall

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And i) shaving refers to electrical engineering and can be used in various electrical installations that require stabilization of high dc voltage.

The purpose of the invention is to improve the overall dimensions of a high voltage DC voltage regulator.

The drawing shows a functional diagram of a high voltage DC voltage regulator.

The high-voltage DC voltage regulator contains a transistor 1, a transistor 2, and the emitters of these transistors are connected to a negative input terminal, the master oscillator 3, the total output of which is connected to SNOiTTepaM transistors 1 and 2, one output to the base of transistor 1, and the other output to the base of transistor 2, a high-frequency single-phase transformer A with magnetics shunty the extreme terminals of the primary winding of which are connected to the collectors of transistor and 1 and 2, and the average output of this winding is connected to the positive input To the output, the control winding of this transformer is divided into two halves, each of which is located on its core and these HALF) windings are connected in series, a high-voltage rectifier 5, whose input is connected to the secondary winding of the transformer, and the output to the output pins, parallel to the output of the high-voltage rectifier 5, the filter capacitor 6 is switched on, the reverse power amplifier, one of which is connected to the negative output terminal,; by a plow input - to the positive / negative side; one output terminal, and two ode connected to the output terminals of the transformer and the control winding

The high voltage stabilizer on the CTOHFiHoro voltage operates as follows.

If there is a nominal mains voltage and load current and a nominal output voltage, the feedback amplifier 7 sets a certain amount of current (nominal) in the control winding of the transformer 4 When the mains voltage or load current changes, for example, the serge changes by + 10 % and the current

decreases to the minimum allowable value, the bias current decreases in the control winding. This causes the reactance of the magnetic shunts for the variable flow to decrease, which allows the outflow of magnetic flux created by the primary winding to increase, increasing the magnitude of the amplitude transformer secondary winding. This happens with little or no change in shape.

AC voltage curve on the winding winding of the transformer

The application of the proposed high-voltage DC voltage regulator compared with the known

gives a significant gain in the dimensions of the device. Such regulation allows the inverter to operate without a pause (without taking into account the necessary pause to prevent through currents

in two-stroke converters).

Only due to this, it is possible to significantly (20-30%) reduce the dimensions of high-voltage transformers and filters. High voltage chokes are not required, which at high voltages and at low currents have a small effect of suppressing the variable component. Inverter operation at an increased frequency without a pause reduces (by 2-5 times) the capacitance value of the filter capacitor, which also reduces the size of the device.

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Claims (1)

Invention Formula A high-voltage DC voltage regulator containing a push-pull inverter consisting of two npp transistors whose emitters are connected to a negative input terminal, which drives a high-frequency square-wave generator, whose total output is connected to emitters of pnp - transistors, the first output - to the base of the first transistor, and the second output - to the base of the second transistor, a high-voltage rectifier, the polar output terminals of which are connected to the corresponding output terminals, the filter capacitor, on Connected parallel to the output pins of the high voltage rectifier, the feedback amplifier, the first input is connected to the negative output, and the second input to the positive output, characterized in that, in order to improve the weight and size characteristics, high frequencies are introduced into it. - a single-phase transformer with secondary shunts, the secondary winding of which is wound on its magnetic core and connected to the output terminals of the high-voltage rectifier, and the control winding of the transformer is divided on into two halves, each of which is wound on a CROW magnetic core, and half (the control windings are interconnected counter-sequentially, the control winding of free leads is connected to the outputs of the feedback amplifier, in addition, the primary winding is made with a midpoint and covers all three magnetic cores, middle the output of the primary winding is connected to the positive input output, and the two extreme leads of the primary winding are connected to npp transistor collectors,