SU1259442A1 - A.c. voltage converter - Google Patents

Abstract

The invention relates to electrical engineering and can be used as a constant and alternating current power source with a frequency-walkable frequency. The purpose of the invention is to increase efficiency and enhance functionality. The device contains a two-winding transformer 1, a full-wave bridge rectifier 2 connected to load 3 via a linear choke 4, as well as additionally introduced serial line from capacitors 5, 6 and nonlinear throttles 7 connected in parallel to the output of the rectifier 2, and three non-linear two-winding transformers. The primary windings of 8, 9, 10 nonlinear transformers are connected in a star. The ends of the indicated star are connected respectively to the connection point of capacitor 6 with nonlinear choke 7, to the connection point of one of the outputs of rectifier 2 with non-linear choke 7, to the connection point of capacitors 5, 6, Secondary windings 11,12, 13 non-linear transformers are connected in series, By forming the output pins for connecting the load 14, the device provides simultaneous power supply of the active load 3 with constant current and reactive load 1 4 with a current of the usdester frequency. 1 il. 14

Description

g

The invention relates to electrical engineering and is intended for use as a power source of direct and alternating current with a frequency-related gear (in relation to the mains frequency).

The purpose of the invention is to increase the efficiency and enhancement of the functionality by providing a resistive load with a resistive current and a reactive frequency used-frequency current.

The drawing shows a schematic diagram of a variable voltage converter,

The converter contains a two-transformer transformer 1, its primary winding is connected to the mains, the second winding is connected to the output of two half-cycle bridge rectifier 2, DC load 3 via a linear choke 4 is connected to the output of the full-wave bridge rectifier 2. To the output terminals of the rectifier Mitel 2 is connected to a chain consisting of two capacitors 5 and 6 connected in series and a nonlinear throttle. In addition, the converter contains three linear two-winding transformers, in which one The conclusions of the primary windings of 8 - 1 € are combined into a common point. The free output of winding 8 is connected to a common connection point of capacitor 6 and nonlinear throttle 7, the free output of winding 9 is connected to a common connection point of the output pin of the connector 2 and the winding of nonlinear throttle 7, the free output of winding 10 is connected to a common connection point of capacitors 5 and 6. The secondary windings 11-13 of non-linear transformers are connected in series according to one another and connected to the output terminals for connecting the load i,

The variable voltage converter operates as follows

When the primary winding of the transformer 1 is connected to the mains voltage of frequency -, the resulting EMF on the secondary winding feeds the input of the rectifier 2. At the output of the slider 2, a load current appears, in which the constant and variable components are present, the analytical dependence which is described as follows: Jij 2l j / 7r - () cDS 2Jt- (43

594422

/ 15P) cos 4tJt, r / ieJ j is the amplitude of the current; the amplitude of the constant component of the output current; 43 i / 3Tl is the amplitude of the second harmonic current.

5 A constant component through the choke 4 feeds the load 3. The variable component of the double frequency 43 / ЗТГсо5 2h, H feeds the ferroresistive circuit (elements 6 and 7) through a separation capacitor 5, in which, at a certain ratio of the circuit parameters, autoparametric oscillation is excited at the frequency 2uJ. Voltages encountered between

15 elements 6 and 7 are shifted by an angle of 2ТТ / 3 and feed the primary windings of 8-10 non-linear transformers operating in the saturation mode. Due to the inclusion of the primary winding nonlinear

20 transformers per star, secondary - in a triangle, voltages on the secondary winding with a frequency of 2 and 3 (main harmonic) are mutually compensated, and EMF with a frequency of 6 uJ (one third harmonic) remain and feed the load 14. The current form on the active load is sinusoidal with a non-linear distortion factor of 12-15%.

Form u l and KZ about b re shadow

An alternating voltage converter containing a two-winding transformer, the primary winding of which is connected to the input terminals for connecting the supply mains, and the secondary winding to the input of the full-wave bridge rectifier, whose output is connected to the output through a linear choke with a load that differs from the fact that, in order to increase efficiency and enhance functionality, it additionally introduces a chain connected in parallel to the output of the rectifier two capacitors and nonlinear droplets, as well as three two-winding nonlinear transformers, the same terminals of the primary windings of the nonlinear transformers are combined into a common point, the free output of the primary winding of the first transformer is connected X to the common connection point of one of the specified chains, free the output of the primary winding of the second transformer is connected to

312594424

the other non-linear output of the non-linear transformer, the free output of the primary winding are connected in series according to and the connected transformer is connected to the Additional output pins of the common connection point of the two for connecting additional capacitors, and the secondary winding 5 loads.

Claims (1)

₃₀ FORMULA INVENTION An AC voltage converter containing a two-winding transformer, the primary winding of which is connected to the input terminals for connecting the mains, and the secondary one is connected to the input of a half-wave bridge rectifier, the output of which is connected through the line reactor to the output terminals to connect the load, which distinguishes this that, in order to increase efficiency and expand functional capabilities, it is additionally introduced into it a circuit consisting of a series connected in series with the rectifier output two capacitors and a non-linear inductor, as well as three double-winding non-linear transformers, with the same terminals of the primary windings of the non-linear transformers combined into a common point, the free terminal of the primary winding of the first transformer connected to the common connection point of one of the capacitors and one terminal of a non-linear inductor of the specified chain, a free terminal the primary winding of the second transformer is connected to another terminal of the nonlinear inductor, the free terminal of the primary winding of the third transformer By connecting the common connection point of said two capacitors, and secondary windings 5 nonlinear transformers are connected in series and connected according to dopolnitelnv ^ output terminals for connecting an additional load.