阅读说明：本技术 双开关高变倒调工变补偿的交流稳压电源 (Double-switch high-voltage-change reverse-regulation power-change-compensation alternating-current voltage-stabilized power supply ) 是由 龚秋声 于 2019-10-08 设计创作，主要内容包括：本发明属于补偿式交流稳压电源,它有单相和三相两种,三相由3个单相星形连接组成。单相双开关高变倒调工变补偿的交流稳压电源,它由高频倒调变压器T1、工频补偿变压器T2、2个双向开关S1和S2、1个电感L、2个电容C1和C2及其控制电路组成,S1由2个二极管和2个三极管或4个二极管和1个三极管组成,S2由2个单向晶闸管V3、V4反并组成,本发明与同一发明人发明的龚氏半桥斩波调压工变补偿式交流稳压电源相比,用高频变压器替代了带中心抽头的工频自耦变压器,具有体积小重重轻的优点。(The present invention belongs to a compensation type AC voltage-stabilized power supply, it has two kinds of single-phase and three-phase, three-phase is formed from 3 single-phase star-connected power supplies. Compared with the Gong' S chopper half-bridge voltage regulation and engineering compensation type AC stabilized power supply invented by the same inventor, the invention uses the high-frequency transformer to replace the power frequency autotransformer with the center tap, and has the advantages of small volume, light weight.)

1. Single-phase two-switch high change backward regulation power of worker becomes alternating current voltage regulator power of compensation, it is by high frequency backward regulation transformer T1, power frequency compensation transformer T2, 2 bilateral switch S1 and S2, 1 inductance L, 2 electric capacity C1 and C2 and control circuit constitute, S1 comprises 2 diodes and 2 triodes or 4 diodes and 1 triode, there are 2 AC input end (A1, N), 2 steady voltage output end (A2, N), its characterized in that: s2 is composed of 2 unidirectional thyristors V3 and V4 in an inverted mode, a first input alternating current input end (A1) is connected with one end of a T2 secondary winding W2, one end of a T2 primary winding W1, one end of a capacitor C1 and one end of a bidirectional switch S1, the other end (1) of the bidirectional switch S1 is connected with one end of a bidirectional switch S2 and one end of a T1 primary winding W1, one end (2) of the T1 secondary winding W1 is connected with one end of an inductor L, the other end (3) of the inductor L is connected with one end of a capacitor C1 and the other end of the T1 primary winding W1, a first voltage stabilization output end (A1) is connected with the other end of the T1 secondary winding W1, a second alternating current input end (N) is connected with a second voltage stabilization output end, the other end of the bidirectional switch S1, the other end of the capacitor C1, the.

2. The three-phase double-switch high-voltage reverse-regulation power-transformation compensated alternating-current voltage-stabilized power supply comprises 3 single-phase double-switch high-voltage reverse-regulation power-transformation compensated alternating-current voltage-stabilized power supplies according to claim 1, and is characterized in that: the three-phase double-switch high-voltage reverse-regulation power transformation compensation alternating-current stabilized-voltage power supply is formed by star connection of 3 single-phase double-switch high-voltage reverse-regulation power transformation compensation alternating-current stabilized-voltage power supplies, and comprises 3 alternating-current input ends (A1, B1 and C1), 3 voltage-stabilizing output ends (A2, B2 and C2) and 1 common end (N) of alternating-current input and voltage-stabilizing output.

Detailed description of the preferred embodiments

In order to further understand the technical solution of the present invention, the present invention is described in detail by the following specific examples.

As can be seen from FIG. 1: the single-phase double-switch high-voltage-change voltage-regulation power-transformation-compensation alternating-current voltage-stabilized power supply shown in the attached figure 1 comprises a high-frequency inverse-modulation transformer T1, a power-frequency compensation transformer T2, 2 two-way switches S1 and S2, 1 inductor L, 2 capacitors C1 and C2 and a control circuit thereof, wherein S1 comprises 2 diodes D1 and D2 and 2 triodes V1 and V2. S2 is composed of 2 unidirectional thyristors V3 and V4, and has DC signals on their trigger electrodes in positive and negative half cycles of power supply. Therefore, the voltage can be inverted and regulated by only regulating the on-off ratio of the bidirectional switch S1 in the chopping voltage regulation process. The working principle is as follows:

1) when the voltage at two input ends is between the lowest voltage and the highest voltage required to be output by voltage stabilization, the S1 is subjected to main control, chopping output voltage U1n of continuous flow of S2 passes through boosting chopping voltage U2n of a high-frequency boosting transformer T1, and then voltage obtained at the 3 end of a primary winding W1 of a compensating transformer T2 through LC low-pass filtering is equal to voltage of an input A1 end, the voltage at two ends of a primary winding W1 of the compensating transformer T2 is zero at the moment, no compensating voltage exists at two ends of a secondary winding W2, and the voltage at two output ends of the voltage stabilization is equal to alternating current voltage at two input ends.

2) When the voltage at two input ends is higher than the high and low voltages required to be output by voltage stabilization, the conduction pulse width of S1 is reduced, the chopping output voltage U1n, the boosting chopping voltage U2n of the high-frequency boosting transformer T1 and the voltage obtained at the 3 end of the primary winding W1 of the compensating transformer T2 through LC low-pass filtering are reduced, at the moment, the 3 end of the voltage at the two ends of the primary winding W1 of the compensating high-voltage device T2 is negative, the A1 end is positive, the A1 end of the induced voltage at the two ends of the secondary winding W2 is positive, the A2 end is negative, reverse voltage compensation is realized on the voltage at the two output ends of the voltage stabilization, and the voltage at the two output ends of the voltage stabilization is stabilized within the voltage range required by. When the bi-directional switch S1 is fully turned off, the high frequency transformer is represented by stem T1 and L is the high frequency inductor, so the maximum compensation voltage across the primary winding W1 of the compensation transformer T2 is close to minus 220V.

3) When the voltage at two ends of the input is lower than the minimum voltage required to be output by stabilized voltage, the conduction pulse width of S1 is increased, the chopped wave output voltage U1n, the boosted chopped wave voltage U2n of the high-frequency boosting transformer T1 and the voltage obtained at the 3 end of the primary winding W1 of the compensation transformer T2 through LC low-pass filtering are all increased, at the moment, the voltage at two ends of the primary winding W1 of the compensation high-voltage transformer T2 is positive, the end A1 is negative, the voltage induced at two ends of the secondary winding W2 is negative at the end A1, and the end A2 is positive, so that the voltage at two ends of the stabilized voltage output is compensated and adjusted in a positive voltage range required by the stabilized voltage supply. The maximum compensation voltage across the primary winding W1 to achieve T2 is positive 220V. The boosting ratio of the T1 primary winding W1 and the secondary winding W2 and the chopping control on-off ratio of S1 can be achieved by properly selecting.

From the above, it can be seen that only the control signals of the transistors V1 and V2 in the bidirectional switch S1 are automatically adjusted, so as to implement ac voltage stabilization.

The three-phase two-switch high-voltage reverse-modulation power transformation compensated alternating-current voltage-stabilized power supply shown in the figure 2 is formed by star-connecting 3 single-phase two-switch high-voltage reverse-modulation power transformation compensated alternating-current voltage-stabilized power supplies shown in the figure 1, and comprises 3 three-pole alternating-current input ends (A1, B1 and C1), 3 three-phase alternating-current voltage-stabilized output ends (A2, B2 and C2) and 1 input-output common end (N).

The bidirectional switch S1 of the present invention can also be composed of 4 diodes and 1 triode. Compared with the Gong's half-bridge chopping voltage regulation and power transformation compensation type alternating current stabilized voltage supply invented by the same inventor, the high-frequency transformer replaces a power frequency autotransformer with a central tap, and the alternating current stabilized voltage supply has the advantages of small size, weight and light weight.