SU742902A1 - Switch-type dc voltage stabilizer - Google Patents

Description

The invention relates to electrical engineering and can be used to power various radio engineering equipment. According to the main author. St. No. 528295 is known for a key voltage regulator containing a transistor controller with a BCB filter at the output, a measuring element connected to the output of the stabilizer, and a controller control unit made in the form of a pulse pulse modulator on an asymmetrical, magnetically transistor a generator consisting of a transformer with two secondary windings, one of which is connected to a power source through a series-connected zener diode. The emitter of one of the transistors of the magneto-transistor generator, the collector of which is connected to one of the terminals of the other transformer winding, is connected to the positive stabilizer bus, and the other output of this winding is connected to the power supply minus through an additionally inserted transistor, the base of which is under ™ to the measuring to the body. The disadvantage of this stabilizer is the large power dissipation by the zener diode, which requires radiators to remove it, which increases the size. The aim of the invention is to reduce the size of the stabilizer. This is achieved by introducing a resistor and an additional transistor into the proposed DC voltage regulator, with the zener diode connected with an anti-resistor to the negative input bus, and the emitter-base of the additional transistor between the output of one secondary winding of the transformer and the cathode of the zener diode includes an emitter-base transition of the additional transistor whose collector jumps to the positive output bus, when a resistor is connected between the zener cathode and the positive output bus, the drawing shows a schematic diagram of the proposed stabilizer ora

It contains a front-side controller Ij latitude-no. Impedance modulator, performed on transistors 2, 3 and transformer 4, LCP-filter 5, 6, 7, measuring element 8-12 connected to the output of the stabilizer, transistor 13 connected in series with one of the transformer windings, additional transistor 14, the emitter-base junction of which is connected between the output of the transformer winding and the anode of the Zener diode 15, and the collector; night to the output of the stabilizer, additional resistor 16, turned on; between the positive power supply source and the anode of the Zener diode 15.

1 The stabilizer works as follows.

: If you connect to the SOS. ON buses to the ifoHHKa power supply, the transistor opens, 2 and the difference in the voltage of the source of the cytans, Zener diode 15 and the emitter of the transmitter for the tractor 14 is applied to the winding of the transformer 4. At this point, the output of the TM5 signal is 5m, we remove 1M winding of transformer 4, open goanzistor 1,

DS1 filter and load are pressure sources of Chinese. When disconnecting the trap capacitor 2 and turning on the transhHixix control regulator 1, the strainer does not apply to the kISB filter

Kpause) When the transistor is 2 martin transistor retiepiiTopa, the current flowing through the transformer is transient. closes through the transistor 14 into the load, with IT the main cat is useful in the load and does not dissipate the Zener diode 15 with B, as h) takes place in the prototype, as a result, does not require the use of heat sink radiators, and therefore not dimensions increase. Such a switch of transistor 1 is possible} -: ayu because. that the voltage Ea load; e is equal to the total voltage on the Zener diode 15 and the emitter-base of the transistor 14i But so. as a rule: it is almost always less than this voltage (because of a drop on ipatJ

and 1 and C C D - (})), the current of the winding of the transistor through the transistor 14 and the load is always possible. | Granzistor 14 operates in key mode. This circumstance allows the use of conventional transistors without tenlots.

 As a rule, Zener diodes with high stabilization current (type; I) 815 are used, which have a large TKN, which leads to temperature instability of a higher voltage. wives

Thus, the introduction of an additional resistor and a transistor allows most of the current flowing through the transformer winding to be closed through the load, thus reducing the power dissipated at the zener diode. Thus, there is no need for heat sink. radiators and louvers; stabilizer. In addition to i-oro, the task of stabilizing the output voltage due to changes in ambient temperature is facilitated, and efficiency also increases somewhat.

 o rm u l a i 3 O b e te n u

Constant stabilizer kshechevoy & auth. sv; No. 528295, which means that, in order to reduce the overall dimensions of the stabilizer, a resistor and an additional transistor are inserted into it, with the zener diode connected by an anode to the negative input bus, and megapa by one secondary winding of the transformer and cathode the zener diode includes an emitter-base transition of an additional transistor, a Koi-oporo collector under the keys to a 1 gol o die output bus, with an eyum resistor connected between the cathode, the stabil1 ron and the polo5;

Claims (1)

Claim Key DC voltage stabilizer according to ed. sv; N ° 528295, characterized in that, in order to reduce the size of the stabilizer, a resistor and an additional transistor are introduced into it, and the zener diode is connected by an anode to the negative input bus, and an emitter-base transition is connected between the output of one secondary winding of the transformer and the zener diode a transistor whose collector is connected to a positive output bus, while a resistor is connected between the cathode of the zener diode and the positive output bus,