SU1020941A1 - High-voltage power supply source - Google Patents

Abstract

A HIGH-VOLTAGE POWER SUPPLY, containing an oscillator driving one of the pulse-width pulse inputs: l torus, another input that connects with a source of electrical power, a key stage with a resonant boost transformer; and weekends are straightened out, of those who have. and so that, in order to improve the efficiency of modulating voltage changes in the area, a single-vibrator and coincidence circuit was introduced, from the inputs of which is connected to the output of an X-pulse modulator, and the other: to the output of a single-vibrator, the input of which is connected to one from the oOMOTFOK transformer, and the output of the coincidence circuit is connected to the control input of the key stage. About N) About Oiiii

Description

The invention relates to the conversion of constant voltage high voltage to high voltage and can be used to supply power devices, such as projection arrays with a low range of variation of load currents. Transformer voltages are known that contain a switch with a transformer load controlled by the Shunt Signals 13 and t23. A disadvantage of the known converters is the low efficiency, which is explained by the presence of circuits for the desi of the oscillatory process in the transformer. The closest source of power is a high-voltage power supply containing a suitable generator connected to one of the inputs of a pulse-width modulator i, the other input of which is connected to the source of modulating voltage, as well as a key element with a resonant booster transformer and an output voltage of 3 L A disadvantage of the known inverter is a low average efficiency in the range of variations in the magnitude of the modulating voltage. This is explained by the fact that ensuring high efficiency of the converter is possible for any one, definite ratio of the Phases of the pulses controlling the operation of the key cascade and the oscillatory process that occurs in the transformer at the moments of locking the key cascade, and the change in the modulus value the associated change in the pulse duration of the control pulses (keeping the phase unchanged) leads to a change in the phase of the oscillatory process, which excludes the possibility of maintaining the optimum ratio of the decree nyzs phase throughout the range of values izmeneyyy modulating voltage and, iB result, the efficiency reduces individuals. ::. . : i i The purpose of the invention is to increase the efficiency of the source in the range of varying magnitudes of the modulating voltage. The goal is achieved by the fact that in a high-level area of the XPeRBIT4NI phoccId, which contains a back-up window and a non-interrupt (connected to piuHiswy from one of the modulator and another 1PUT which connects to a CPRP and one-year-a-year-per-year programmer who will be a per-visitor who will be affected Orozonais HfcjM: a transient transformer | xmn; 8 | xk (dY1I vsr smil'e, odiT (and the circuit of the fallout of one of the inputs of which is connected to the output) -and H1 of the pulse modulator C: the other - It has an output of the adnstibrator, and the input has a trace; from the windings of the transfr) E 4ator, and in The output of the coincidence circuit is connected to the control input of the key stage. The essence of the invention is that the control pulses of the key stage are phased oscillatory process: in a transformer, not the signal of the master oscillator,: as; this is the case in the known converter. high-voltage power supply circuit. The device contains a master oscillator 1, the output of which is connected to the input of the pulse-width modulator 2. The second source is connected to the second input 3 of the latter ruyuschego voltage. The modulator output is connected to one of the inputs of coincidence circuit 4. The coincidence circuit gate is connected to the control input of the crank stage 5. The load on the key stage is a resonant step-up transformer. B. The high-voltage output of the transformer 6 is connected to the top of the mouse 7, the output 8 of which is the output of the converter. The output of one of the transformer windings is connected to the start input of the one-shot 9. The output of the one-shot is connected to the input of the coincidence circuit. To ensure initial start-up, a valve cascade 10 is also introduced into the source, the signal input of which is connected to the output of the master oscillator, and a portion of the output voltage of the source is supplied to the control input 11. The output of the valveing cascade 10 is connected to the launch input of the one-shot 9. In order to obtain the linearity of the modulation characteristic of the source, taking into account the possible frequency instability of the backward generation of op 1, the period of its pulses is chosen according to the frequency T j. “IO, 8 K) 1, where T g the Resonance frequency of the transformer 6, K is a parameter characterizing the duration of free oscillations in the transformer 6. Parameter K is chosen from the series O, 1, 2, 3 ...; etc. (the choice of the K value is determined by compromise) by obtaining a high efficiency of the ribs and ensuring its sustainability. It was established experimentally that these requirements satisfy tt 1 and va ae, and increasing the video quality to the unit leads to the same | haa shsh | The formate with mBptiO is 10%. At 1C 1, a non-addictive goerato .rv is permissible. os i-gaet; -:;: 2 (j%) .; The outputs of the impulse generator are chosen to be equal to tOii if the voltage is applied, we are going to be taken up by one (3 modulators of the feedback circuit (n0 shown,) to be 8 times 8).

In order to ensure the safeguarding of stability to the stability of the schybovibrator, its start-up is dried | es-;; transformer voltage maximum b. At the same time, the duration of the starfed pulses of the vibrating vibrator 9 is chosen for the maximum efficiency of the converter to be equal to 0.5 re

Circuit 4 matches is implemented so that the front and front edges of its OUTPUT: the signal coincided with the rear edges of the impulses, step on its inputs, respectively, from modulator 2 and the single-oscillator 9.

Depending on the elemental base used, the coincidence circuit 4 can be performed on the basis of a pulse-controlled RS-flip-flop, or, as shown in the drawing, on the Hip, I.

The high-voltage power supply operates in the following 11KF1 fashion.

In the installation mode under the influence of pulses; The generator from master oscillator 1 and in accordance with the magnitude of the modulator of this voltage at the input E of the modulator 2 produce width-modulated slips with a constant front edge and V variable rear phase. These pulses, interacting with four co-pulses with the pulses of a single-shot 9, are converted into latitude-modulated pulses with the Schimis and phases of both fronts. Moreover, the trailing edge phase is set through a single vibrator $ by the maximum of the resonant voltage of the transformer b (the odjvibrator is started before the key stage 5 is unlocked), and the leading edge phase and, therefore, / the pulse duration are set in accordance with the magnitude of the voltage of the module at input 3 Latitude modulated. The pulses from the 4 coincidence circuit are fed to the input. the cluster stage 5 and control its duration from -. covered state;

Changes in the value of modulating, continuous and inlet 3 and connecting with them The change of the 6aTejibHoro nipoueoca phase phase in the transformer 6 is called through the one-vibrator 9 and the 4-phase scheme corresponding to the change in the phase-front phase of the latitudinal moduli. impulses controlled by the operation of the key cascade 5. As a result, the ratio of the ac: 3 panned phases is kept constant and does not depend on the magnitude of the modulator (1).;.; i;

Initial launch 6 days ago | Ator 9 and with it the entire source is implemented by a nanometer generator; 1 through klapannruTs) 1f1y Y. As cascade slew vyesodnogo voltage source and sootvotstvuhntsego increase nashr Gennes feedback UQI inlet 11 klapaniruyuvshy cascade closed and dalneyishy start monostable 9 osu14esttl e: G voltage, a transformer postupsho1f1m .: b; . - ..: ...; .- -; .. - -;:, -

Providing mutual investment; Va phase of the oscillatory process In the transformer and control pulses, the tuiD04eBbro carcass allows them to maintain their optimal position throughout the whole range of change in magnitude (“output voltage”, and, consequently, it absorbs the average efficiency of the source.

Crema increase the mean cdc; The proposed compilation provides an improvement in the weight and size characteristics of the source, and also increases its reliability and stability in. . . . -. .. ,

Claims (1)

A HIGH-VOLTAGE POWER SUPPLY SOURCE, comprising a master oscillator connected to one of the inputs of a pulse-width modulator, the other input of which is connected to a modulating voltage source, a key stage with a resonant step-up transformer _; and an output rectifier, which is due to the fact that, in order to increase the efficiency in the range of changes in the value of the modulating voltage, a single vibrator and a coincidence circuit are introduced, one of the inputs of which is connected to the output of a pulse-width modulator, and the other - to the output of the one-shot, the input of which is connected to one of the transformer windings, and the output of the matching circuit is connected | to the control input of the key helmet - SU,. „1020941