SU408290A1 - - Google Patents

Description

(54) MANAGED HIGH PRESENT STABILIZER KENYA

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The invention relates to electronic power supply of electronic equipment and MoiHceT used, for example, in power supply devices of high-voltage electrodes of electron-beam tubes and two-layer: luminophors in color monitors for various purposes.

Known controlled high-voltage stabilizers contain a master oscillator connected in series by a pre-phaser of a canopy, above smoothing out a filter, an amplifier of an atomic communication, the input of which is connected to the middle terminal of the divider, and the output is connected to the input of the control unit by the specified phase amplifier.

The isophenic chain is an extension of the functional capabilities of the device by obtaining switching output voltage levels during production.

This is achieved by introducing an additional voltage converter with a supplementary rectifier on the output in a known pre-phase generator via an input key element connected to the outputs of the said generator and an input threshold element, the input of which is connected to the input of the feedback amplifier, with different polarity the outputs of the main and auxiliary rectifiers are connected via a hundred atron, the divider is equipped with a resistor shunted in the entered control key, and the control unit is connected between the driver osnsyunym for generators and voltage converter.

In the drawing isofazhena block diagram

5 of the proposed device.

Receiving a high output voltage is provided by a low constant voltage source 1, a master oscillator 2 rectangular pulses,

Claims (1)

0 converter 3 voltage to high alternating voltage, high voltage rectifier 4 and capacitive smoothing filter 5. IZMORPTSTALHYOL DOLITOLZ.Z OUTPUT) 1Oh voltage on rosters 6 - 8, source 9 onopiioi o voltage, amplifier 10 feedback and unit 11 control - in the form of a pulse-width modulator, together with the aforementioned nodes 3-5, form a feedback loop that maintains the constant output voltage at a given level. The output of the generator 2 is connected via a key element 12 with an additional voltage transformer 13 connected to the rectifier 14. The key element 12 is controlled by a threshold element 1 whose input is connected to the input of the amplifier 10. Transistor 16 bypasses the output voltage divider 8. The heteropolar outputs of rectifiers 4 and 14 are connected via a high-voltage zener diode 17. The stabilizer operates as follows. The feedback loop maintains the voltage across the resistors 7 both in constant and approximately equal to the reference. When applied from an external source of unlocking voltage to the base of the transistor 16, it shunts the resistor 8, the division factor of the divider changes, and the stabilizer maintains another, higher output voltage. After the termination of the control pulse, the transistor 16 is locked and the output voltage decreases When switching from low to high voltage, the switching time is quite small, since it is determined by the capacitance of the filter capacitor 5 and the resistance of node 1, 3 and 4. When switching to The low level of the voltage of the condensate of the filter 5 cannot be discharged quickly enough either to the rectifier 4 diodes or to the load resistance. In the proposed device, during the switching of the voltage to a lower level of the capacitor of the filter 5, the additional circuit from nodes 12 to 17 is introduced. After the transistor 16 is locked, the voltage at the input of the amplifier 10 and the threshold element 15 is significantly different from zero, which leads to locking the pulse-width modulator of the nodes 3 and 4 in unlocking the key element 12 y .-: y1 13 and 1A, Summlris). For example, a rectified migraion 4 P 14 opens Zener diode 17, through which the discharge of the capacitor FIL}: Tra 5 occurs. After reducing the output voltage to a predetermined level at the outputs of the amplifier 10 and the element 15, the threshold element 15 closes again the key element 12 disconnecting the converter 13 and the rectifier 14, and the amplifier 1O re-activates the circuit 11, 3, 4, 5. When switching to a higher voltage level, the threshold element 15 does not respond to an increase in the input voltage, since it has a negative polarity, the amplifier 10 fully opens the micro-pulse modulator 11 and the filter capacitor 5 is charged quickly. Claims of the invention A controlled high voltage regulator containing a master oscillator connected in series with a voltage converter, a rectifier and a capacitive smoothing filter amplifier Ofatn communication, the input is connected to the middle output of the divider, and the output - to the input of the control unit of the specified converter, characterized in that, in order to extend the functionality of the In order to obtain output voltage switching levels during operation, an additional voltage converter was introduced with an additional rectifier at the output, through an input key element connected to the outputs of the said generator and an input threshold element, the input of which is connected to the input of the amplifier of the communication link, the different-sided outputs of the main and additional rectifiers are connected via a zener diode, the divider is equipped with a resistor shunted in a given control switch, and the control unit is turned on It is switched between the master oscillator and the main voltage pre-phase generator. Sources of information taken into account in the examination 1. US Patent N 2987664, cl. 321-2, 1961.