SU1661737A1 - Alternative viltage regulator - Google Patents

Abstract

The invention relates to electrical engineering, in particular, to sources of secondary power supply for electronic equipment. The goal is to improve the weight and size parameters by using a booster transformer with a non-sectional primary winding. The device contains a booster transformer 1 with a primary winding 2 and a secondary winding 3, an integrating LC filter with a choke 4 and capacitors 5, 6, transistor switches 7, 8, a pulse-width control node 9, a full-wave bridge rectifier with diodes 10-13. The capacitors 5, 6 simultaneously perform the functions of an auxiliary (booster) alternating voltage source with zero output. For any deviations of the output voltage of the device, the primary winding 2 of booster transformer 1 operates in a two-stroke mode, with a calculated power of about two times lower than the known technical solutions, and, accordingly, less weight and dimensions, since it is made with twice the number of turns . The switching order of the transistor switches 7, 8 is determined by the pulse-width control unit 9. 2 Il.

Description

one

(21) 4602408/07

(22) 11/05/88

(46) 07.07.91. Bul N 25

(71) Research and Development, Design and Technological Institute of Power Semiconductor Equipment Production Association Electric Operator

(72) V.N. Filatov

(53) 671.316.722.1 (088.8)

(56) USSR Author's Certificate No. 1416955, cl. G 05 F 1/44, 1987.

USSR author's certificate number 792233, cl. G 05 F 1/44, 1978.

(54) AC VOLTAGE REGULATOR

(57) The invention relates to electrical engineering, in particular, to sources of secondary power supply for electronic equipment. The goal is to improve mass and dimensional parameters by using a booster transformer with non-sectional primary winding. The device contains a booster transformer 1 with a primary winding 2 and a secondary winding 3, an integrating LC filter with choke 4 and capacitors 5 and 6, transistor switches 7 and 8, node 9 Pulse width control, two-field diode bridge rectifier with diodes 10-13 . The capacitors 5 and 6 simultaneously perform the functions of an auxiliary (voltage boost) alternating voltage source with zero output. In case of any deviations of the output voltage of the device, the primary winding 2 of the volt-free transformer 1 operates in a two-stroke mode with approximately two times lower rated power compared to the known technical solutions and, accordingly, less mass and dimensions, since it is made with twice the number of turns. The switching order of the transistor switches 7 and 8 is determined by the pulse-width control unit 9. 2 Il.

with SS

(L

O5 O

vj

with

ten

15

20

The invention relates to electrical equipment and is intended to be used in stabilizing sources of toric power supply of radio electronic equipment.

The purpose of the invention is to improve the overall dimensions by using a booster transformer with a non-sectioned primary winding.

FIG. 1 shows a functional variable voltage regulator circuit; in fig. 2 - timing charts of signals illustrating his work.

The AC voltage regulator contains a booster transformer 1 with a primary winding 2 and a secondary winding 3, an integrated LC filter with a choke 4 and capacitors 5 and 6, transistor switches 7 and 8, a pulse-width control node 9, a full-wave bridge rectifier with diodes 10-13. The con-25 capacitors 5 and 6 of the integrating LC filter simultaneously perform the functions of an auxiliary (volt-boost) alternating voltage source with zero output. The controller also has pins 14 and 15 for connecting a primary source of alternating voltage and pins 16 and 17 for connecting a load. The secondary winding 3 of booster transformer 1 is connected in series with the choke 4 of the integrating LC filter to one of the power busbars located between terminals 14, 15 and 16, 17.

The first output of the primary winding 2 is connected via a transistor switch 7 to the first pole of a full-wave bridge rectifier (with cathodes of diodes 10 and 11), and through a transistor switch 8 to its second pole (with anodes of diodes 12 and 13). The input of the rectifier is connected to the output of an auxiliary source of alternating voltage (to the disconnected plates of capacitors 5 and 6). The outputs of the pulse-width control unit 9 are connected to the basic circuits of the transistor switches 7 and 8. The second output of the primary winding 2 is connected to the zero output of the auxiliary source of alternating voltage (to the combined plates of the capacitors 5 and 6).

thirty

35

40

45

50

55

five

0

five

0

five

0

45

50

five

The regulator works as follows.

When mains voltage Uc is applied to pins 14 and 15, alternating voltage 11c also appears at the load (at terminals 16 and 17) and at the input of the bridge rectifier, ensuring the formation of diodes 10 and 11 and anodes of diodes 12 and 13 relative to the cathodes the zero point of the two systems of pulsating rectified voltages M and U, 7 (Fig. 2a), respectively, of positive and negative polarity.

The sequence of switching on the gyro pulse-driven transistors 7 and 8 is set by the control unit 9 depending on the required sign of the volt additive.

When the mains voltage -Is of the stabilizer relative to the given output 11c decreases, for example, transistor 8 at a positive half-wave and transistor 7 at a negative half-wave are turned on. Accordingly, on the secondary winding 3, a boost voltage Ugi is formed, folding with the network Uc (Fig. 26). The average value of the resulting voltage is controlled by the duty cycle of the frequency control of the transistors 7 and 8 for the duration of the corresponding half-wave of the mains voltage Uc.

As the mains voltage Uc increases (or the load decreases), transistors 7 and 8 turn on in a different sequence, ensuring the formation on the secondary winding 3 of booster voltage Ue ", subtracted from the main mains Uc (Fig. 2b).

In both modes of operation of the regulator, the primary winding 2 of booster transformer 1 operates in a push-pull mode with about two times lower rated power compared to the known technical solutions and, accordingly, less mass and dimensions, since it is made non-sectioned, with twice the number of turns. Due to the smaller number of turns, the dissipation flux and dissipation inductance of the booster transformer 1 are reduced, the switching conditions of the transistors 7 and 8 are simplified, the possibility of the magnetic circuit is eliminated

Magnification of the transformer 1.

As an auxiliary source of alternating voltage, you can use not only output, but also input or third-party voltage, matched in magnitude by a transformer or autotransformer, with the artificial zero point performed by any known means.

Claims (1)

Invention Formula An AC voltage regulator containing a booster transformer, the secondary winding of which is connected in series with the inductive link of the integrating LC filter to one of the power buses located between the terminals for connecting the primary AC voltage and load source, and the first output of the primary winding through one of two transistor switches are connected to the first pole of a full-wave bridge rectifier connected by an input to the output of an auxiliary source of alternating voltage of the same frequency, a pulse-width control node whose outputs are connected to the basic circuits of transistor switches, characterized in that indicators by using a booster transformer with a non-sectioned primary winding, the auxiliary source of alternating voltage is made with a zero output, the first output of the primary winding of the booster transformer is connected via another transistor key to the second pole of the full-wave bridge rectifier, and its second output is connected to the zero output of the auxiliary source of alternating voltage. five b