CN212572398U

CN212572398U - Double-switch chopping voltage-regulating power transformer compensation type alternating current voltage stabilizer

Info

Publication number: CN212572398U
Application number: CN202020516477.6U
Authority: CN
Inventors: 龚秋声
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-06
Filing date: 2020-04-06
Publication date: 2021-02-19
Anticipated expiration: 2030-04-06

Abstract

A double-switch chopping voltage-regulating work-change compensation type AC voltage stabilizer is composed of single-phase and three-phase, and the single-phase is composed of 2 bidirectional switches S1 and S2, power frequency transformer T, 2 coupling inductors Z1 and Z2, 6 capacitors C1-C6 and control circuit. A chopping switch S1, a coupling inductor Z1, windings W1 and W2, capacitors C1, C2 and C5, and windings W11 and W2 of T form 1 parity compensation voltage regulating circuit. Chopping switch S2, coupling inductor Z2, windings W1 and W2, capacitors C3, C4 and C6, and windings W12 and W2 of T form 1 anti-phase compensation voltage regulation circuit. Its power frequency transformer T is not only the phase reversal transformer but also the offset transformer, the utility model discloses compare with the AC voltage stabilizer of the two-way regulation offset voltage of AC chopper of same designer's design, just save a power frequency phase reversal autotransformer, compare with double-switch chopping control pressure regulating power transformer compensation formula AC voltage stabilizer, the structure is simply managed to consume lowly.

Description

Double-switch chopping voltage-regulating power transformer compensation type alternating current voltage stabilizer

[ a ] the technical field

The utility model relates to a chopping voltage regulation uses power frequency to become compensation transformer offset voltage's compensation formula alternating current voltage stabilizer.

[ II ] background Art

The invention relates to an alternating current chopping control voltage regulation compensation type alternating current voltage stabilizer which has the advantages of high accuracy, high cost performance and the like of continuous stepless contactless voltage regulation, and is the development direction of the current compensation type alternating current voltage stabilizer. The problem of large tube consumption exists when 2 full-control switches in a double-switch chopping control voltage regulation industrial transformer compensation type alternating current voltage-stabilized power supply patent application 201811016597.3 document invented by the same inventor need to work simultaneously, and a step-down alternating current chopping voltage-regulating circuit without a freewheeling switch (application number 201910787600.X) invented by the same inventor creates conditions for designing a new compensation type alternating current voltage-stabilized power supply.

[ third ] summary of the invention

The utility model aims at designing a two switch chopping power frequency transformer compensation formula alternating current voltage stabilizer.

In order to achieve the purpose, the designed double-switch chopping voltage regulation power-transformation compensation type alternating current voltage stabilizer has a single phase and a three-phase, wherein the single phase consists of 2 two-way switches S1 and S2, a power frequency transformer T, 2 coupling inductors Z1 and Z2, 6 capacitors C1-C6 and a control circuit thereof, and is characterized in that: the on-off ratio of a regulating switch S regulates the same-phase compensation voltage, the on-off ratio of the regulating switch S regulates the reverse-phase compensation voltage, a coupling inductor Z and Z have windings W, W wound on the same magnetic core, a power frequency transformer T has 2 primary windings W, W and 1 secondary winding W, a first alternating current input end (1) is connected with one end of the switch S, one end of the switch S and one end of W of the T, a first voltage stabilizing output end (3) is connected with the other end of W of the T, the other end (4) of the switch S is connected with one end of W of the Z and one end of C, the other end (5) of W of the Z is connected with one end of C, one end of C and one end of W of the T, the other end (6) of W of the T is connected with the other end of C, the other end of C and one end of W of the Z, the other end (7) of the switch S is connected with, One end of a capacitor C6 is connected with one end of a W12 of the T, the other end (9) of the W12 of the T is connected with the other end of the capacitor C4, the other end of the capacitor C6 and one end of the W2 of the Z2, and a second alternating current input end (2) is connected with a second voltage-stabilizing output end, the other end of the capacitor C1, the other end of the capacitor C3, the other end of the W2 of the Z1 and the other end of the W2 of the Z2.

The three-phase AC voltage stabilizer is formed by star-connecting the 3 single-phase double-switch chopping control voltage-regulating power transformer compensation type AC voltage stabilizers, and comprises 3 AC input ends (A1, B1 and C1), 3 voltage-stabilizing output ends (A2, B2 and C2) and 1 common end (N) for AC input and voltage-stabilizing output.

Description of the drawings

Fig. 1 is the utility model discloses a single-phase two switch chopping voltage regulation worker becomes compensation formula alternating current voltage stabilizer. Fig. 2 is the utility model discloses a three-phase chopper AC voltage stabilizer. Wherein: s1, S2, S1A, S2A, S1B, S2B, S1C and S2C are bidirectional fully-controlled switches, T, TA, TS and TC are power frequency transformers, W11, W12 and W4 are primary and secondary windings of T, Z1, Z2, Z1A, Z1B, Z1C, Z2A, Z2B and Z2C are coupling transformers, W1 and windings of W2 coupling inductors, V1-V4 are triodes, D1-D4 are diodes, and C1-C6 are capacitors.

Detailed description of the preferred embodiments

As can be seen from FIG. 1: the bidirectional switch S1 is composed of diodes D1, D2 and 2 triodes V1, V2, the bidirectional switch S2 is composed of diodes D3, D4 and 2 triodes V3, V4, the coupling inductors Z1 and Z2 are both provided with 2 windings W1, W2, the power frequency transformer T is provided with 2 primary windings W11, W12 and 1 secondary winding W2. A free-wheeling filter circuit is formed by cross-connecting 2 windings W1 and W2 of Z1 with 2 capacitors C1 and C2 and C5. And 2 windings W1 and W2 of Z2 are connected with 2 capacitors C3 and C4 in a cross way, and C6 forms another free-wheeling filter circuit. The working principle is as follows:

a) a chopping switch S1, a coupling inductor Z1, windings W1 and W2, capacitors C1, C2 and C5, and windings W11 and W2 of T form a 1-freewheeling-tube-free alternating current chopping forward compensation voltage regulating circuit. In the on state of S1, 5 points are high in potential, current flows from S1 → W1 of Z1 → C5 and W11 of T → W2 of Z1, and meanwhile, capacitors C1 and C2 are charged to store energy through W1 and W2 of Z1. When S1 is in an off state, C5 supplies power to W11 of T, C1 provides a freewheeling circuit for W2 of Z1, and C2 provides a freewheeling circuit for W1 of Z1. Therefore, the power frequency voltage chopped by the switch S1 is obtained on the primary winding W11 of the T, and the on-off ratio of the secondary control switch S1 of the T is adjusted to reach the required forward compensation voltage.

b) The chopper switch S2, the windings W1 and W2 of the coupling inductor Z2, the primary windings W12 and W2 of the capacitors C3, C4 and C6 and T form another 1 alternating current chopper reverse compensation voltage regulating circuit without a follow current tube, 8 points are high in potential when S1 is in an on state, W1 of S2 → Z2 → C6 and W12 of T → W2 of Z2 have current, and meanwhile, the capacitors C3 and C4 charge energy storage through W1 and W2 of Z2. And when S2 is in an off state, C6 supplies power to W12 of T, C3 provides a freewheeling circuit for W2 of Z2, and C4 provides a freewheeling circuit for W1 of Z2. Therefore, the power frequency voltage chopped by the switch S2 is obtained on the primary winding W12 of the T, and the on-off ratio of the secondary control switch S1 of the T is adjusted to reach the required reverse compensation voltage.

As can be seen from the above, when the input voltage is lower than the regulated voltage, the on/off ratio of the automatic adjustment switch S1 can be regulated. When the input voltage is high or low and the voltage is stabilized, the on-off ratio of the automatic regulating switch S2 can be stabilized,

the three-phase double-switch chopping voltage regulation and power transformation compensation type alternating current voltage stabilizer shown in the attached figure 2 is formed by star-connecting 3 single-phase double-switch chopping voltage regulation and power transformation compensation type alternating current voltage stabilizers shown in the attached figure 1, and comprises 3 tripolar alternating current input ends (A1, B1 and C1), 3 three-phase alternating current voltage stabilization output ends (A2, B2 and C2) and 1 input and output common end (N).

The bidirectional switch S1 and S2 in the present invention can also be composed of 4 diodes and 1 triode. Compared with the AC stabilized voltage supply invented by the same inventor, the AC stabilized voltage supply saves a power frequency autotransformer with a center tap, has the advantages of small size, heavy weight and light weight, and has simple structure and low tube consumption compared with a double-switch chopping voltage regulation power transformer compensation type AC stabilized voltage supply. .

Claims

1. A double-switch chopping voltage regulation power transformer compensation type alternating current voltage stabilizer comprises a single phase and a three-phase, wherein the single phase consists of 2 two-way switches S1 and S2, a power frequency transformer T, 2 coupling inductors Z1 and Z2, 6 capacitors C1-C6 and a control circuit thereof, and is characterized in that: the on-off ratio of a regulating switch S regulates the same-phase compensation voltage, the on-off ratio of the regulating switch S regulates the reverse-phase compensation voltage, a coupling inductor Z and Z have windings W, W wound on the same magnetic core, a power frequency transformer T has 2 primary windings W, W and 1 secondary winding W, a first alternating current input end (1) is connected with one end of the switch S, one end of the switch S and one end of W of the T, a first voltage stabilizing output end (3) is connected with the other end of W of the T, the other end (4) of the switch S is connected with one end of W of the Z and one end of C, the other end (5) of W of the Z is connected with one end of C, one end of C and one end of W of the T, the other end (6) of W of the T is connected with the other end of C, the other end of C and one end of W of the Z, the other end (7) of the switch S is connected with, One end of a capacitor C6 is connected with one end of a W12 of the T, the other end (9) of the W12 of the T is connected with the other end of the capacitor C4, the other end of the capacitor C6 and one end of the W2 of the Z2, and a second alternating current input end (2) is connected with a second voltage-stabilizing output end, the other end of the capacitor C1, the other end of the capacitor C3, the other end of the W2 of the Z1 and the other end of the W2 of the Z2.

2. The double-switch chopping voltage regulation work change compensation type alternating current voltage stabilizer according to claim 1 is characterized in that: the three-phase chopper-controlled AC voltage stabilizer comprises 3 single-phase double-switch chopper-controlled voltage regulation and power transformation compensation type AC voltage stabilizers as claimed in claim 1, wherein the 3 single-phase double-switch chopper-controlled voltage regulation and power transformation compensation type AC voltage stabilizers are connected in star shape to form 1 three-phase chopper AC voltage stabilizer, and the three-phase chopper-controlled AC voltage stabilizers are provided with 3 AC input ends (A1, B1 and C1), 3 voltage stabilization output ends (A2, B2 and C2) and 1 AC input and voltage stabilization output common end (N).