CN212435592U

CN212435592U - Single-phase and three-phase single-switch chopping control voltage regulation power transformer compensation type alternating current voltage stabilizer

Info

Publication number: CN212435592U
Application number: CN202020516307.8U
Authority: CN
Inventors: 龚秋声
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-06
Filing date: 2020-04-06
Publication date: 2021-01-29
Anticipated expiration: 2030-04-06

Abstract

The utility model belongs to a cut accuse voltage regulation compensation formula alternating current voltage stabilizer, it has single-phase and two kinds of three-phases, and the three-phase comprises 3 single-phase star connections. The AC voltage stabilizer consists of high-frequency boosting transformer T1, industrial frequency compensating transformer T2, 1 two-way switch S, 3 inductors L1-L3, 5 capacitors C1-C5 and control circuit, and S1 consists of 4 diodes and 1 triode. A three-phase chopping control voltage regulation transformer compensation type AC voltage stabilizer is formed by star connection of 3 single-phase single-switch chopping control voltage regulation transformer compensation AC voltage stabilizers. The utility model has the advantages of least quantity of the two-way switches, simple structure, low cost, high efficiency, high precision, high cost performance, continuous stepless contactless conversion regulation, good benefit and the like.

Description

Single-phase and three-phase single-switch chopping control voltage regulation power transformer compensation type alternating current voltage stabilizer

[ one technical field ] the utility model relates to an exchange and cut accuse pressure regulating and use frequency conversion compensating transformer compensating voltage compensation formula AC voltage stabilizer.

The AC chopping control voltage regulation of the prior art has the advantages of continuous stepless non-contact voltage regulation, high precision, high cost performance and the like, is the development direction of the current compensation type AC voltage stabilizer, and various four-switch chopping control voltage regulation power transformer compensation type AC voltage stabilizers of the same inventor have the defect of more bidirectional switches.

Thirdly, the purpose of the invention is to reduce 1 bidirectional switch without the phase inversion of the mains frequency autotransformer.

In order to achieve the above purpose, the designed ac voltage stabilizer for single-phase and three-phase single-switch chopping control voltage regulation power transformation compensation has two types, namely a single phase and a three-phase, wherein the single phase consists of a boosting high-frequency transformer T1, a power frequency compensation transformer T2, 1 two-way switch S, 3 inductors L1-L3, 5 capacitors C1-C5 and a control circuit thereof, the S consists of 4 diodes and 1 triode, and has 1 ac input and voltage stabilization output common terminal (2), 1 ac input terminal (1), and 1 voltage stabilization output terminal (3), and is characterized in that: capacitors C and C are cross-connected with inductors L and L, an alternating current input end (1) is connected with one end of a T secondary winding W, one end of a T primary winding W, one end of a capacitor C and one end of a bidirectional switch S, the other end (4) of the bidirectional switch S is connected with one end of the inductor L and one end of the capacitor C, the other end (5) of the inductor L is connected with one end of the capacitor C and one end of a transformer T primary winding W, the other end (6) of the T primary winding W is connected with the other end of the capacitor C and one end of the inductor L, one end (7) of the T secondary winding W is connected with one end of the inductor L, the other end (8) of the inductor L is connected with one end of the capacitor C and the other end of the T primary winding W, a voltage stabilizing output end (3) is connected with the other end of the T secondary winding W, one end, The other end of the capacitor C5 is connected with the other end of the T1 secondary winding W2, and the three phases are formed by connecting 3 single-phase stars.

Figure 1 is a single-phase single-switch chopping control voltage regulation transformer compensation type alternating current voltage stabilizer of the utility model. Figure 2 is the utility model discloses a three-phase single switch chopping control voltage regulating worker becomes compensation formula AC voltage stabilizer, and it comprises the star connection of 3 single-phase single switch chopping control voltage regulating worker change compensation formula AC voltage stabilizer that figure 1 shows. Wherein: s is a bidirectional full-control switch, L1-L3 are inductors, T1 is a high-frequency boosting transformer, T2 is a power frequency compensation transformer, W1 and W2 are primary windings and secondary windings of T1 and T2, V is a triode, D1-D4 are diodes, C1-C5 are capacitors, and the three-phase single-switch chopping control voltage regulation power transformation compensation type alternating current voltage stabilizer is provided with 3 alternating current input ends A1, A2, A3, 3 voltage stabilizing output ends A2, B2 and C2. 1 input/output common terminal N.

The detailed implementation mode can be known from the attached figure 1: the single-phase single-switch chopping control voltage-regulating power-transformation compensation type AC voltage stabilizer is formed from boosting high-frequency transformer T1, power-frequency compensation transformer T2, 1 two-way switch S, 5 capacitors C1-C5 and 3 inductors L1-L3, and S is formed from 4 diodes D1-D4 and 1 triode V, and its working principle is as follows:

when S is conducted, the inductor L1 and the T1 loop with current in the primary windings W1 and L2, and meanwhile C1 charges and stores energy through L1 and C2 charges and stores energy through L2. At S-break, C1 energy storage freewheels through T1 primary winding W1 and inductor L2 discharge, and C2 energy storage freewheels through T1 primary winding W1 and L1 discharge. The high-frequency current passing through the primary winding W1 of T1 induces a boosting high-frequency pulse voltage U27 on the secondary side, and then the voltage U82 filtered by L3C3 is finished to have the same waveform as the input voltage U12, and the primary winding W1 of the compensating transformer T2 is connected between the input 1 end and the output 8 end.

Therefore, by properly selecting the turn ratio of the primary winding and the secondary winding of the high-frequency boosting transformer T1 and adjusting the on-off ratio of the switch S, the compensation voltages u18 and u13 induced by the primary windings and the secondary windings W1 and W2 of the compensation transformer T2 can realize bidirectional voltage regulation, and the voltage at two ends of the voltage stabilizing output can realize voltage stabilization by controlling the on-off ratio of the switch S.

For example: when the single-phase 220V alternating current voltage stabilizer selects T1 with the boosting ratio of 3, namely the primary turn number is 1n, the secondary turn number is 3n, and the on-off ratio of the bidirectional switch S is adjusted from zero to the maximum, the voltage of the two ends of the primary winding W1 group of the compensation transformer T2 changes as follows:

a) when the on-off ratio of the switch S is 1: 3 and the T1 boost ratio is 3 times, the voltage at the end of 8 terminal is equal to that at the end of 1 terminal, the voltage at two ends of the primary winding W1 of the power frequency compensation transformer T2 is zero, and the compensation voltage at the secondary winding W2 is zero.

b) When the on-off ratio of the switch S is more than 1: 3, the voltage of the 8 ends is higher than that of the 1 end, and the voltage of the two ends of the primary winding W1 of the power frequency compensation transformer T2 is as follows: the 1 terminal is negative, the 8 terminal is positive, and the compensation voltage direction of the secondary winding W2 of the T2 is opposite to or the same as the phase of the input voltage, so that reverse or forward compensation is realized. When the on-off ratio is 3: 2, the voltage on the primary winding W1 of the power frequency compensation transformer T2 is 220V of reverse power supply input voltage.

c) When the on-off ratio of the switch S is less than 1: 3, the voltage of the end of 8 is lower than that of the end of 1, the voltage of two ends of a primary winding W1 of the power frequency compensation transformer T2 is as follows: the 1 terminal is positive, the 8 terminal is negative, and the compensation voltage direction of the secondary winding W2 of the T2 is the same as or opposite to the phase of the input voltage, so that the forward compensation or the reverse compensation is realized. When the on-off ratio of the switch S is close to zero, the voltage of the positive power supply input voltage on the primary winding W1 of the power frequency compensation transformer T2 is close to 220V.

Because the impedance of the secondary winding W2 and the high-frequency inductor L3 of the T1 to the power frequency current is very low and negligible, the voltage drop of the current on the primary winding W1 of the power frequency compensation transformer T2 flowing through the L3 winding and the W2 winding of the T1 is close to zero, and therefore, the forward voltage of the primary winding W1 of the T2 is also close to the input power supply voltage. The compensation voltage direction of the secondary winding W2 of the T2 is the same as or opposite to the phase of the input voltage, and forward or reverse compensation is realized.

From the above, it can be seen that the ac voltage stabilization can be realized only by feedback-adjusting the on-off ratio of the bidirectional switch S.

FIG. 2 shows a three-phase chopping control voltage regulation power transformer compensation type AC voltage stabilizer, which is formed by star-connecting 3 single-phase single-switch chopping control power transformer compensation type AC voltage stabilizers shown in FIG. 1, and comprises 3 three-pole AC input ends (A1, B1 and C1), 3 three-phase AC voltage stabilization output ends (A2, B2 and C2) and 1 input-output common end (N)

The utility model has the advantages of simple structure, with low costs, good reliability, efficient, switch quantity is minimum, need not the conversion and just can realize continuous infinitely variable control etc, is the new generation chopped control compensation formula AC voltage stabilizing power supply new product, has great benefit.

Claims

1. Single-phase and three-phase single switch chop control voltage regulation worker becomes compensation formula AC voltage regulator, it has single-phase and three-phase two kinds, single-phase by step up high frequency transformer T1, power frequency compensation transformer T2, 1 bilateral switch S, 3 inductance L1 ~ L3, 5 electric capacity C1 ~ C5 and its control circuit constitute, S comprises 4 diodes and 1 triode, there are 1 AC input steady voltage output common port (2), 1 AC input (1), 1 steady voltage output (3), its characterized in that: capacitors C and C are cross-connected with inductors L and L, an alternating current input end (1) is connected with one end of a T secondary winding W, one end of a T primary winding W, one end of a capacitor C and one end of a bidirectional switch S, the other end (4) of the bidirectional switch S is connected with one end of the inductor L and one end of the capacitor C, the other end (5) of the inductor L is connected with one end of the capacitor C and one end of a transformer T primary winding W, the other end (6) of the T primary winding W is connected with the other end of the capacitor C and one end of the inductor L, one end (7) of the T secondary winding W is connected with one end of the inductor L, the other end (8) of the inductor L is connected with one end of the capacitor C and the other end of the T primary winding W, a voltage stabilizing output end (3) is connected with the other end of the T secondary winding W, one end, The other end of the capacitor C5 is connected with the other end of the T1 secondary winding W2.