SU1494173A1 - Ac-to-dc voltage converter - Google Patents

Abstract

The invention relates to electrical engineering and can be used in sources of secondary power supply used in communications equipment, automation and computer technology. The purpose of the invention is to increase reliability by reducing radio interference and periodically releasing the load from the network. Radio interference passes through the rectifier at the same time as the current through the valve 6. When the rectifier is closed, 4.5, they are attenuated by the capacity of the closed valve. Pulse modulator 2 increases the transmission ratio of radio interferences and due to fast tilting, at low valve currents, increases the efficiency of the rectifier. The source 3, with the valves closed, provides an additional offset to the valves, which reduces its capacity in the locked state. 2 hp f-ly, 4 ill.

Description

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The invention relates to electrical engineering and can be used with secondary power sources used in communications equipment, automation and computer technology.

The purpose of the invention is to increase reliability by reducing radio interference and periodically releasing the load from the network.

FIG. 1-3 shows the schematic diagrams of the described device; in fig. 4 - diagrams of his work.

The converter contains a transformer 1, the secondary winding of which is made with an average output connected to a pulse modulator 2, parallel) 10 to which a source 3 of a constant nanometer is connected. KpafiHue ptorichesky windings are connected to the current in the longitudinal windings of 4.5,) which are connected, forming the same output (5D.

In the first output the output is formed by the anode of the valve 6, which forms a sequential chain with the modulator 2. A filter capacitor 7 may be connected to the output of the converter. In order to increase the effect of protection against interference to existing elements and connections of converter 8, a series of series-connected valves 9, 10 (in Fig. Only one series) can be additionally connected, before which two series-connected capacitors 11 are connected, 12, the connection point of which is grounded, and in parallel with these 1 capacitors - a resistor 13.

The converter in FIG. 3 is improved by connecting in parallel to each of the K (.1 capacitors 1 1, 12 valves 14.15.

FIG. 4 marked: with - the current time; I, and - voltage and current on the circuit elements; 1 ,,, U ,, g voltage on secondary windings 1.1 and 1.2 Uj - voltage at the output of source 3; BF - voltage pulsation on the modulator input when the output is locked; IP - current through the valve 6.

The Converter operates as follows.

At a positive half-wave voltage on the winding 1.1 (U,,), when this voltage exceeds the voltage on the capacitor 7 (U) and the threshold voltage of the control signal is

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The modulus of the mountain module (HJUI key) 2 starts the oTruipaTbCH, and the nents 4.6 open. The unlocking voltage rises further and the modulator 2 is completely unlocked. The voltage drops, the current increases through the valves 4,6 (1). After charging the capacitor 7, the current flowing through the modulator drops. The locking of the modulator is accelerated. It increases the voltage and. Current 1 stops. The voltage in the load is supplied from the capacitor 7. In the second half-period, the voltage across the winding 1.2 (U,) increases. When the threshold is reached, the modulator opens. Initiation (P to flow the current Chery VENTIJP 6.5 (1,). Process.: F-TC) i.

1 Adiop (5 Laughs of Chyu Gyu pass through the chapter mits.. Och11O) f1-: .iM J. At 3inifcinix 1 entil x, they are loosened by the lock valve. The modulator of the torquing speed of the radio frequency of the passage of radio speeds and the ja account of the rapidity of tipping over, at low currents of the K1Sh spike valves, is mi tel. Source 3 with the valves closed, feeds complete. CMeuieH, ie at the valves, reduces its capacity in the locked state.

Converters n,) f ;; g. 2 and 3 are much more likely to allow umpere1 radio interference With 1 ent locked; x

In the rectifier of FIG. 2, the interference suppression is provided by y; euult of the power of the radio interference on the dividers: the locked valve 9,10 - capacitors 11, 12; in FIG. 3 - due to the reduction of the moshdgy ryldiohum on the dividers: the locked valve 9,10 open valve 14,15 and capacitors 1 1, 12.

The resistors 13 and the valves 14, 15 also reduce the reverse voltage across the valves 9, 10, so the pentiles 9, 10 can be selected with low return voltages and capacitances in the locked state, which provides an additional weakening of the rectifier passing through radio interference, including harmonic components, was Yu-1, their rectifier.

The use of several successive locking chains and the selection of the modulator operation mode make it possible to form a kind of conversion voltage that forms the smallest

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Claims (3)

1. Variable transducer voltage to a constant containing a transformer, secondary; and the winding of which is made with an average triode and is connected by extreme conclusions to the corresponding anodes of two rectifying agents: .le, unified) - which form. form the first single outlet, so that with a chain -,. about increase)} reliability by means of wastes; 1) (and radio interference and periodic separation) loading: from the network, additionally the third doesn’t have a third and impulse modulator, which follow. | A chain is included between the average of the i-row iiootki and B-1o;) th rn. In this case, the modulator of the modulator is connected to the combined cathodes of the valves, and the parallel Jno modulator is connected to a source of constant voltage with a polarity opposite to that of its third valve. 2. The converter according to claim 1, about t - l and h and y and with the fact that each of the 1 outgoing vyyudsi h with the pins forming them, includes the rows of post-doser. direction, and before switching on each row of valves between their opposite electrodes, in parallel, a transistor and two BKjiio4eHHNX capacitors are connected in series, the connection point is 1; b :: -. grounded. 3. The Converter in PP. 1 and 2, a different gene that is parallel to each konde: an apora at 1; h: point by D1: are included) I1 rents: 1 with a single polarity with the valves of the row between which they are connected. FIG. 2 FIG. five