CN212726865U

CN212726865U - Two-way voltage regulator for output of double-switch AC chopper transformer

Info

Publication number: CN212726865U
Application number: CN202020516369.9U
Authority: CN
Inventors: 龚秋声
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-06
Filing date: 2020-04-06
Publication date: 2021-03-16
Anticipated expiration: 2030-04-06

Abstract

A bidirectional voltage regulator for double-switch AC chopper transformer output is composed of 2 bidirectional switches S1 and S2, 1 high-frequency output transformer T, 2 coupling inductors Z1, Z2, 4 capacitors C1-C4 and a control circuit thereof, and is characterized in that: the coupling inductors Z1 and Z2 have windings W1 and W2 wound on the same magnetic core, the high-frequency output transformer T has 2 primary windings W11 and W12 and 1 secondary winding W2, the on-off ratio of one switch S1 is adjusted to realize forward voltage regulation, and the on-off ratio of the other switch S2 is adjusted to realize reverse voltage regulation.

Description

Two-way voltage regulator for output of double-switch AC chopper transformer

[ a ] the technical field

The invention relates to an alternating current chopping bidirectional voltage regulator, in particular to a bidirectional voltage regulator using two fully-controlled bidirectional switches.

[ II ] background Art

The AC chopper bidirectional voltage regulator is the most important key technology of modern continuous, stepless, contactless and high-performance compensation type AC voltage-stabilized power supply and UPS power supply. The two-switch and four-switch bidirectional regulation principle invented by the same inventor in a paper of ' Gong ' half-bridge and full-bridge bidirectional regulation principle ' published in the 1-phase < power supply declaration > in 2018, the former needs two serial AC power supplies to realize output bidirectional voltage regulation, and the regulation range is only half of the input voltage. The invention of the same inventor in the last year uses a full-control switch, 1 coupling inductor and 2 or 3 capacitors of a chopper voltage regulating circuit (invention application number: 201910787600.X), and lays a foundation for designing a new bidirectional voltage regulator.

[ third ] summary of the invention

The utility model aims to design a circuit for realizing a two-way voltage regulator by using 2 chopper circuits without follow current tubes.

In order to achieve the above object, the present invention provides a bidirectional voltage regulator for dual-switch ac chopper transformer output, which comprises 2 full bidirectional switches S1 and S2, 1 high-frequency output transformer T, 2 coupling inductors Z1, Z2, 4 capacitors C1-C4 and a control circuit thereof, and is characterized in that: the coupling inductors Z1 and Z2 have windings W1 and W2 wound on the same core, the high-frequency output transformer T has 2 primary windings W11 and W12 and 1 secondary winding W2, the first AC input terminal (1) is connected with one end of the switch S1 and one end of the switch S2, the other end (5) of the switch S1 is connected with one end of the W1 and one end of the capacitor C2 of the Z1, the other end (6) of the W1 of the Z1 is connected with one end of the capacitor C1 and one end of the W11 of the T, the other end (7) of the W11 is connected with the other end of the capacitor C2 and one end of the W2 of the Z1, the other end (8) of the switch S2 is connected with one end of the W1 of the Z2 and one end of the capacitor C4, the other end (9) of the W1 of the Z2 is connected with one end of the capacitor C3 and one end of the T3, the other end (10) of the W3 is connected with the other end of the capacitor C3 and the other end of the first AC input end of the capacitor C3 and the, and the second voltage regulating output end (4) is connected with the other end of W2 of T.

The transformer T is inverted, and the coupling inductors Z1 and Z2 can be replaced by 2 independent inductors L1 and L2, L3 and L4 respectively.

[ IV ] description of the drawings

Figure 1 the utility model discloses a two-way voltage regulator of two switch alternating current chopper transformer output. Wherein: s1 and S2 full bidirectional switches, D1-D4 are diodes, V1-V4 are triodes, T is a high-frequency output transformer, W1 and W2 are windings of Z1 and Z2, and W11, W12 and W2 are primary vertical windings and secondary windings of T.

The detailed implementation mode can be known from the attached figure 1: the high-frequency power supply comprises 2 full bidirectional switches S1 and S2, 1 high-frequency output transformer T, 2 coupling inductors Z1, Z2, 4 capacitors C1-C4 and a control circuit thereof, wherein T is 1 high-frequency output transformer consisting of primary windings W11, W12 and a secondary winding W2, Z1 is provided with two windings W1 and W2, Z2 is provided with two windings W1 and W2, S1 consists of 2 diodes D1 and D2 and 2 triodes V1 and V2, and S2 consists of S2 diodes D3 and D4 and 2 triodes V3 and V4. The two-way voltage regulation principle is as follows:

a) a chopping switch S1, coupled inductor Z1 windings W1 and W2, capacitors C1 and C2 and a primary winding W11 of T form 1 alternating current chopping voltage regulating circuit without a follow current tube, when S1 is in an on state, 5 points are high in potential, S1 → W1 of Z1 → W11 of T → W2 of Z1 have current, two ends (3 and 4) of W2 of T output adjustable voltage in phase with input, and capacitors C1 and C2 charge and store energy through W1 and W35 2 of Z1. When S1 is in an off state, C1 stores energy to eliminate the energy of self-inductance potential on W2 through W2 of Z1 and W11 loop of T, and C2 stores energy to eliminate the energy of self-inductance potential on W1 through W1 of Z1 and W11 loop of T, so that a follow current tube is not needed.

b) The chopper switch S2, the windings W1 and W2 of the coupling inductor Z2, the capacitors C3 and C4 and the primary winding W12 of the T form another 1 alternating current chopper voltage regulating circuit without a follow current tube, when the S1 is in an on state, 8 points are high in potential, the S2 → W1 of the Z2 → W12 of the T → W2 of the Z2 have current, adjustable voltage in phase opposite to input is output at two ends (3 and 4) of the W2 of the T, and meanwhile, the capacitors C3 and C4 are charged through W1 and W2 of the Z2 to store energy. When S2 is in an off state, C3 stored energy is discharged through W2 of Z2 and W12 of T, and C4 stored energy is discharged through W2 of Z2 and W12 of T.

It can be seen from the 3 windings W11, W12 and W2 dotted terminals of the transformer T of fig. 1: the utility model discloses an with the transformer phase reversal, adopt and adjust a two-way switch S1 break-make ratio, adjust forward output voltage, adopt and adjust another two-way switch S2 break-make ratio, adjust reverse output voltage. The bidirectional switches S1 and S2 can also comprise 4 diodes and 1 triode.

The utility model discloses a when two-way voltage regulator of two switch AC chopper transformer output was applied to compensation formula AC voltage regulator power, its output transformer T can be done and be compensation transformer, compares with goer's half-bridge two-way voltage regulator being applied to compensation formula AC voltage regulator power, just saves a power frequency phase inversion autotransformer, has with low costs, and light in weight and advantage such as small have great social and economic benefits.

Claims

1. A bidirectional voltage regulator for double-switch AC chopper transformer output is composed of 2 bidirectional switches S1 and S2, 1 high-frequency output transformer T, 2 coupling inductors Z1, Z2, 4 capacitors C1-C4 and a control circuit thereof, and is characterized in that: the coupling inductors Z1 and Z2 have windings W1 and W2 wound on the same core, the high-frequency output transformer T has 2 primary windings W11 and W12 and 1 secondary winding W2, the first AC input terminal (1) is connected with one end of the switch S1 and one end of the switch S2, the other end (5) of the switch S1 is connected with one end of the W1 and one end of the capacitor C2 of the Z1, the other end (6) of the W1 of the Z1 is connected with one end of the capacitor C1 and one end of the W11 of the T, the other end (7) of the W11 is connected with the other end of the capacitor C2 and one end of the W2 of the Z1, the other end (8) of the switch S2 is connected with one end of the W1 of the Z2 and one end of the capacitor C4, the other end (9) of the W1 of the Z2 is connected with one end of the capacitor C3 and one end of the T3, the other end (10) of the W3 is connected with the other end of the capacitor C3 and the other end of the first AC input end of the capacitor C3 and the, and the second voltage regulating output end (4) is connected with the other end of W2 of T.

2. The two-way voltage regulator of two-switch ac chopper transformer output according to claim 1, characterized in that: the transformer T is inverted and the coupling inductors Z1 and Z2 can be replaced by independent inductors L1, L2 and L3, L4.