SU1524033A1 - Protected dc voltage supply source - Google Patents

Abstract

The invention relates to electrical engineering and can be used in secondary power sources. The goal is to enhance functionality while maintaining effective protection. This goal is achieved by introducing a high-frequency rectifier 28 with an additional winding of the power transformer 3, switches 29, 30, 32–34 of the network voltage, converter 31 of the constant voltage of the network into a high-frequency variable, and an additional protection node on the elements 35 ÷ 42. At the same time operation of the source from the networks of both alternating and permanent (isolated and non-insulated from the case) voltage, stable switching on, low noise level, reduction of power losses, dimensions and mass. 1 il.

Description

The invention relates to electrical engineering and can be used on secondary power sources.

The goal is to expand the functional capabilities while maintaining effective protection.

The drawing shows a functional diagram of a constant voltage power supply with protection.

The source contains the rectifier I of the mains voltage with the Filter, the output of the KOTopoi o is connected to the converter 2 constant voltage to the alternating high-frequency, the output of which is connected to a series. Connected to the primary windings of the high-frequency transformer 3 and the transformer (current, sh 5 high-frequency voltage drives with cillers connected to the secondary windings of the high-frequency power transformer 3, stibatizers 6 different voltage voltages, one output terminal of which is connected to the body, and One connection to the outputs of the corresponding high-frequency voltage rectifiers 5, I paHCctiopMaTop 7, one of the conclusions of the primary winding of which is connected to the first output of the First resistor 8, the secondary winding is connected to the BxoitoM vpr mitted 9, the output of which is connected to the first storage capacitor O2. relaxation spontaneous generator 11, the outputs of which are connected to the cathode and control electrode of the first tighter 12, the anode of which is connected to the common bus, the master oscillator 13, the input of which is connected to the zener diode 14 Go is connected to the common imuoi: and the output is connected to the above-mentioned converter, the terminal 15 with Liltr and the voltage level regulator, whose input is connected to the secondary winding of the current transformer 4, and the outputs to the collector and emitter of the first transistor 16, the second thyristor 17, the cathode and control electrodes of which are connected respectively to the emitter and collector of the first transistor (zra 16, the first diode 18, the cathode of which is connected to the stabilization cathode: ptrona 14, the anode with the anode of the second thyristor 17 and the first output of the second resistor 19, the second output of whichconnected to the cathode of the second diode 20, the anode of which is connected to the positive terminal of the storage capacitor. К1 of the detector I О

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and the collector of the second transistor 21, the emitter of which is connected to the common bus, the base - with the first output of the third ::: PS TC. p, 1 22, the third diode 23, the anode of a co-ordinate conductor, the first output of a quadrant resistor, .4, the second lead of which is connected to the cathode of the first thyristor 12, n11; 11: source 25, sodepi1P Ы 1 nap . g base per- ijoro of the transistor 16. -the chmitter of which is connected to the power supply, the second capacitor 26 and and the oestp resistor 27, connected successively and connected by the resistor 27 and the capacitor 26, respectively to the positive and positive pins nei) Boro cumulative of capacitor 10, high-frequency pi-iripHMiiTcji, 28 heterogeneous voltages with filters, inputs of short-circuits (. connected with additional

YACHI ORICHNY winding SI.CHS1OGO HIGH of 1st transformer 3, positive IKOD1Yu1 - with the second output of the third resistor 22, negative output terminal - with the cathode of the third diode 23, common output - with a common bus, the first 29 and the second 30 perekzlochatel, whose movable contact connected; It is possible to put a ht.H and a positive input KJKJMf-; ; ii) to the power supply, the constant voltage supply driver L in the 1, alternating current variable, in:; the terminals C of which are connected to the first stationary 1-1 contacts of the first 29 and second 30 switches and the master oscillator 13 , the first output terminal is connected to the moving contact of the third switch 32, the second output viewport is connected to the fixed contact of the fourth crossover: g) chat.l 33 and the first input terminal of the rectifier I of the mains voltage with a filter, the second input terminal of which Push contacts There are 32 and 34 additional switches, the third transistor 35, the emitter of which is connected to the common bus and the first fixed contact of the second switch 30, the second non-down contact of which is connected to the second output of the primary winding of the transformer 7 and the fourth contact of the fourth switch 33, the seventh resistor 36, the first terminal, which is connected to the base of the third transistor 35, is echoed by the first you. water of the third condenser-ator 47, the second output of which is connected to the emitter of the third transistor 35, the eighth resistor 38, the first output of which is connected to the second output of the seventh resistor 36, the second - to the first fixed contact of the first switch 29, the second fixed contact of which is connected with a movable contact of the fifth switch 34 and the second output of the first resistor 8, the ninth resistor 39, the first of which is connected to the second output of the eighth resistor 38, the second output to the collector of the third transistor 35 and the anode of the fourth the diode 40, the cathode of which is connected to the second output of the fifth resistor 25 and the cathode of the fifth diode A1, the anode of which is connected to the connection point of the second capacitor 26 and the sixth resistor 27, the sixth diode 42, the anode of which is connected to the first output of the ninth resistor 39, the cathode - with a cathode of the second diode 20 and the cathode of the seventh diode 43, the anode of which is connected to the second output of the third resistor 22, the fourth capacitor 44 connected between the base and the emitter of the second transistor 21, the fifth capacitor 45 connected between the common bus and the housing.

A constant voltage power supply with protection operates as follows,

In order to enable the power supply of a direct voltage with protection to the AC network, switches 29 and 30 must be switched to a position in which their moving contacts are closed with their second fixed ones, switches 33 and 34 to a position in which moving conchacts are closed with their fixed ones, switch 32 is in a position in which its moving contact is not closed with its fixed one. In this position of the contacts of the switches 29, 30, 32 - 34, the alternating voltage of the mains supply through the switches 29, 30, 33 and 34 is fed to rectifier I, rectified, filtered and supplied to the input of the voltage converter 2, which turns on, as the master oscillator 13 does not work. The supply voltage through the resistor 8 also goes to the primary winding of the transformer 7. Removed from the secondary winding

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transformer 7, the voltage is rectified by rectifier 9 and starts charging capacitors 10 and 26. When they are charged to the required voltage, the relaxation generator 11 and thyristor 12 turn on. The voltage from capacitor 10 through diodes 20 and 18, resistor 19 , the thyristor 12 is supplied to the zener diode 14 and the master oscillator 13, which starts operation.

The voltage from capacitor 26 through diode 41 and resistor 25 goes to the base of transistor 16. It opens briefly and shorts the protection of converter 2. Transmitter 2 turns on and starts operation.

A number of voltages removed from the secondary windings of the transformer 3 are rectified by rectifier 5, filtered and fed to voltage regulators 6. The negative polarity voltage removed from rectifier 28 through diode 23 and resistor 24 is fed to thyristor 12 and keeps it in the on state. At the positive polarity voltage, removed from rectifier 28, through diode 43, resistor 19, diode 18 is fed to master oscillator 13, ensuring its stationary power. This voltage through the resistor 22 is supplied to the base of the transistor 21 with a slight delay in time, determined by the resistance of the resistor 22 and the capacitance of the capacitor 44, opens it. Capacitor 10 is shunted. The power source is included.

The delay in opening the transistor 21 is necessary to obtain a power source switching device.

If the power supply is working and there is a significant overcurrent or short circuit on the secondary windings of transformer 3 or in rectifier 5., or at the inputs of stabilizers 6, or at the outputs of stabilizers 6 if they are not protected against overloads or their protection is defective then the current through the primary winding of the transformer 4 and the voltage at the output of the rectifier 15 increases, the thyristor 17 turns on and shorts the voltage supplying the master oscillator 13. The voltage of the converter 2 voltage stops working, the output voltage of the source ika feed are reduced to zero. The power supply is off for a short time. The thyristor 12 is turned off, the transistor 21 is closed. The charging of the capacitors 10 and 26 begins and the power supply starts up again. If the accident is resolved, the power source will turn on automatically. If the fault is not resolved, then at the time the power source is started up, transistor 16 opens. The protection of the hydrogen generator is switched off for a time sufficient to start the normal operating voltage converter 2, i.e. briefly. During this time, which can be adjusted by changing the resistance of the resistor 27 and the capacitance of the capacitor 26, the latter is discharged and the transistor 16 is closed. The discharge time of capacitor 10 is significantly longer than that of capacitor 26. Capacitor 26 cannot be charged until the next start-up cycle, since thyristor 12 is turned on, and resistor 27 is chosen to be very high impedance. After the transistor 16 is closed, the emergency current continues to flow through the transformer 4 and the thyristor 17 is turned on, shorting the input of the master oscillator 13. The power supply is turned off. Capacitor 10 is discharged through diode 20, resistor 19, thyristors 12 and 17. Capacitor 10 discharges faster than its charge. Thyristors 12 and 17 are turned off. A new cycle of charging-discharging capacitors 1 and 26 and starting-disconnecting the power supply starts, which continues as long as there is a fault and the supply voltage is applied. If the emergency mode described is present at the power source at the time the mains voltage is applied to it, then the start-off operation is performed in the same manner as described.

If the contacts of the switches 29, 30, 32 - 34 are set to the position shown in the drawing, then the rotoB power source is to be switched on to the mains voltage.

A constant mains voltage is fed to the input of a DC / DC converter into a high-frequency variable, which does not turn on until the master oscillator 13 generates. At the same time, the supply voltage through diode 42, resistor 19, diode 18 goes to the input of the master oscillator 13. The master oscillator 13 and pre

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Educator 31 is turned on and starts to work. From the output of the converter 31, to the input of the rectifier; t 1, the amplitude of the alternating voltage is the same as when the power source is turned on in the alternating voltage network. AC voltage: - is output, filtered and supplied to the input of converter 3, which starts as the master oscillator 3 is already running. Further, the power source operates in the same manner as described.

The mains supply voltage through the resistor 39, diode 40, resistor 25 also goes to the base of transistor 16, which is briefly opened and held in this state until transistor 35 opens. The transistor 35 is turned off with a time delay determined by the capacitance of the capacitor 37 and the resistance of the resistor 38.

The resistors 38 and 36, the capacitor 37, the transistor 35 when powered from a DC voltage network, perform the same function as the resistor 27, the capacitor 26 when powered from an AC voltage network.

When the power source is turned on in the AC voltage network, the converter 31, resistors 36, 38 and 39, capacitor 37, transistor 35 do not take part in the operation.

When the power source is turned on in the DC grid, the transformer 7, the resistor 8, the rectifier 9, the capacitors 10 and 26, and the thyristor 12 do not take part in the operation.

Since the power supply buses of the direct voltage network may not be grounded, the level of high-frequency pickups at the outputs of the bat stabilizers increases. To reduce these crosstalk to acceptable values, use a capacitor 45, which bypasses high-frequency crosstalk to the housing.

Diodes 40 - .43 and 20 exclude the influence of the power supply nodes on each other during operation.

 The proposed power source can be switched on both in alternating voltage networks and in low-voltage DC voltages with ground, 1 and ungrounded network wiring. At the same time, the 1-GH-1 (1) is protected (a) is the protection and protection factor and an allowance of 11 -1.1% of all frequencies, which, in any case, tells about the potential of the source source.

Claims (1)

Invention Formula Power supply constant voltage with. for; qyoh containing B iTip;) - a mains voltage suppressor with a (bp output whose output is connected to a transducer input of a constant set to a variable high frequency, the output of which is connected to a post; 1 unit epatg; ., - vyhvkpochll. 1 S. pus; o i (k ;;) M, yr1. ra and transfs). | - i rof, -, i, nsh p, .. t and high hour (1; ui; -.A- tr a L, J) ii: i: -i-- ramp,. eMHi.K. to j. . . rpchim; -: windings CMjlOnUi i i i to OKOCHas i DT-H -TO transform flip,:,; Lp chmi M iopi; ij) iiiio-polar niRs of I & G, one I K output output of which is connected with the case, and the inputs are connected to the corresponding voltage / output voltage (j ;. math, one lh the primary terminals of the primary OSD of which is connected to the GTERN nmnod of the first resistor, the secondary winding is connected to the input of the wines p: -g, 1 ate, the input of which is connected to the first storage condenser and the input of the relaxation generator, which inputs are connected). to the cathode and ypravl, the electrode of the first thyristor, which sets 1 generator, the input to 1. is connected to the zener diode, the anode of which is connected to the anode of the first thyristor, and the output to the above-mentioned converter, rectifier with filter and voltage regulator, the input of which connected to the secondary winding of the current transformer, and the outputs to the collector and emitter of the first transistor, BTOpoii thyristor, the cathode of which is connected to the anode of the first t} of the fistor, the first diode, the cathode of which is coupled to the cathode (1а, the anode to the anode of the BKiporo thyristor and the first conclusion the second (po-) i; cToiJa, the second view of which is connected with the id of the second diode, ais) L Krrropoi c is connected to the; 1 terminal u ino7U) M of the first capacitor and the second peak of the second transistor; to i f P; .: li C | ed1; si with emitter 11 (1: H; MO Ira, b; D; .0 - with the first IJ.M1U i; u). -i t .e i лlch about choistor a, five 0 five 0 five 0 five rg.m and  :; i:; - one . -. I and h and yr 1g; ire ZhGR group - 1 oo retreat diode, ash. - D to. i e.s-; ing | 1 with the first output of the fourth on resisto-RS, and the TI of the OI output of Kolk. l- .uo iOi:;:; :; with the cathode Yerogog about thyrist ;, gigip r rotor, comp; gne H1.1Y nei -.i. g log with the base of the first tr. : Stch r. 1, which is combined with the anode of the first thyristor, the second capacitor and the neck of the resistor, CO1SHII1L II / (T.: .Pedo1 (It is connected and Ill connected to the capacitor cooTH jri and the first capacitor ll, (n.1 () unk shk na.chnyh IMS c) Hraenii effe and .-; -; hch) are not very high; G ;.; b pi: iiioiio; i ipHbi:.:::, li. li T; i., 11HOL1 ,; i-1. S,; 1n; o., 11itell, 1; oh trioj rn. About T.YSOCHOCH c l m Torah, putj. H hLii:; -; 1Д - with the second output. The historian, the negative output terminal — with the cathode of the third .ii.od, the common output terminal — with an o6mt 0 bus, .ch connected to the cathode of the second polyristor, control; u11 e; itctr. The d-; ory is connected to the collector of the first t of the anistor, the first and second switch to: 1 drivers, whose mobile contacts are connected according to: h: 1 h1P1O, with a positive and negative edge, and a transformer; supply voltage 1 in s-1 Sokochas - -j OTHoe variable, input T (:, which is connected to the first contacts of the first and second transmitters and the master oscillator, the first loop output connects to the spring contact of the entered third crossover the reader, the second output pin is connected to the fixed contact The fourth of the entered input switch and the first input output of the mains voltage with the filter, the second input output of which is connected to the fixed contacts of the third and fifth input n (switch, third transistor, eGPM ter of which is connected to the common busbar by the first fixed contact switch, the second Heno; ii: i. ". n ill contact of which is connected with Bii}: i. -: 1 b: with primary water P of cancer .-. fsch mator and under: 5 contact contact of mi if; n. fc- I. T och gel, seventh; ; , -, Dcp-fii; the output of which (h, edg; 1; / i.. -.i i h the second transistor, the second with the first pin of the inserted third capacitor, the second pin of which is connected to the emitter of the third transistor, the eighth resistor, the first pin of which is connected to the second pin of the seventh resistor, the second from the first fixed contact of the first switch, the second fixed pin of which is connected to the movable the contact of the fifth switch and the second output of the first resistor, the ninth resistor, the first output of which is connected to the second output of the eighth resistor, the second output - to the collector of the third rd of the transistor and the anode the inserted fourth diode, the cathode of which is connected to the second pin of the fifth resistor and the cathode of the inserted fifth diode, the anode of which is connected to the connection point of the second capacitor and the sixth resistor, the sixth diode whose anode is connected to the first output of the ninth resistor, the cathode to the second cathode the diode and the cathode of the inserted seventh diode, the anode of which is connected to the second output of the third resistor, the fourth capacitor that is connected between the base and the emitter of the second transistor, and the fifth capacitor connected between the common bus oh and the housing,