CN212343660U

CN212343660U - Single-switch AC chopper coupling inductance bidirectional voltage regulator

Info

Publication number: CN212343660U
Application number: CN202020516306.3U
Authority: CN
Inventors: 龚秋声
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-06
Filing date: 2020-04-06
Publication date: 2021-01-12
Anticipated expiration: 2030-04-06

Abstract

The utility model belongs to power electronics science field exchanges two-way voltage regulator of chopper. A single-switch AC chopper bidirectional voltage regulator is composed of 1 step-up HF transformer T, 1 bidirectional switch S, 3 capacitors C1-C3, 1 inductor L3, and 1 coupling inductor Z wound on the same magnetic core to form inductor L1, L2 and its control circuit, capacitors C1 and C2 are cross-connected with inductors L1 and L2, S is composed of 4 diodes and 1 triode, and has 1 AC input and voltage regulation output common terminal (1), 1 AC input terminal (2), 1 voltage regulation output terminal (3), and the on-off ratio of bidirectional switch S can be continuously regulated to continuously regulate bidirectional output voltage. The utility model has the advantages of bidirectional switch quantity is minimum, simple structure, with low costs, efficient, precision height etc. and can be used to equipment such as compensation AC voltage-stabilized power supply and UPS power. The utility model discloses be expected to receive and list at power electronics textbook and alternating current voltage regulator power supply textbook.

Description

Single-switch AC chopper coupling inductance bidirectional voltage regulator

[ one ] technical field the utility model relates to an exchange two-way voltage regulator of chopped wave, especially involve the two-way voltage regulator of alternating-current chopped wave who has the high frequency transformer that steps up.

The AC chopper bidirectional voltage regulator in the background technology is the most important key technology of a continuous, stepless, contactless, high-performance and high-cost performance compensation type AC stabilized voltage power supply and a UPS power supply. The existing alternating current chopping bidirectional voltage regulator comprises four major types of six switches, five switches, four switches, three switches and two switches, and a single-switch alternating current chopping bidirectional voltage regulator is not available yet. In the Gong's half-bridge and full-bridge bidirectional regulation principle published in the ' Power Collection ' of the same inventor in the 1 st stage of 2018, the invented half-bridge two-switch bidirectional voltage regulator needs 2 series AC power supplies or a power frequency autotransformer with a center tap to realize the voltage regulation of output bidirectional voltage, and the voltage regulation range is only half of the input voltage.

Thirdly, the invention aims to reduce 1 bidirectional switch and design a bidirectional output voltage regulator which can adjust the bidirectional output voltage by only one bidirectional switch and is named as a goer's single-switch alternating current chopping coupling bidirectional voltage regulator.

In order to realize the above-mentioned purpose, the utility model discloses single switch AC chopper coupling inductance two-way voltage regulator, it is by 1 high frequency transformer T that steps up, 1 two-way switch S, 3 electric capacity C1 ~ C3, 1 inductance coupling inductance Z, 1 inductance L3 and control circuit constitute, S comprises 4 diodes and 1 triode, W2, W2 is T first, secondary winding, two-way voltage regulator circuit has 1 AC input pressure regulating output common terminal (1), 1 AC input end (2), 1 individual pressure regulating output end (3), its characterized in that: z is composed of 2 inductors L1 and L2 wound on the same magnetic core, capacitors C1 and C2 are connected with inductors L1 and L2 in a cross mode, an alternating current input and voltage regulation output common end (1) is connected with one end of a bidirectional switch S, the other end (4) of the bidirectional switch S is connected with one end of an inductor L1 and one end of a capacitor C2, the other end (5) of an inductor L1 is connected with one end of a winding W1 and one end of a capacitor C1, the other end (6) of the winding W1 is connected with the other end of the capacitor C2 and one end of the inductor L2, an alternating current input end (2) is connected with the other end of the inductor L2, the other end of the capacitor C1, one end of the capacitor C3 and one end of the winding W2, the other end (7) of the winding W2 is connected with one end of the inductor. The number of winding turns of W2 is more than that of winding turns of W1.

Figure 1 shows a single-switch ac chopper coupled inductor bidirectional voltage regulator of the present invention. Wherein: s is a bidirectional chopping switch, D1-D4 are diodes, V is a triode, T is a high-frequency boosting transformer, W1 and W2 are primary and secondary windings of T, Z is a coupling inductor, L1 and L2 are inductors of two windings of the coupling inductor Z, L3 is an inductor, C1-C3 are capacitors, 2 is 1 alternating current input end, 3 is 1 voltage regulating output end, and 1 is 1 alternating current input and voltage regulating output common end.

The detailed implementation mode can be known from the attached figure 1: s is composed of 4 diodes D1-D4 and 1 triode V. L1 and L2 are 2 inductors formed by 2 windings of the same winding of Z, and W1 and W2 are the primary winding and the secondary winding of T.

Let W2 have 3 times the number of turns of W1. The working principle is as follows:

a) when S1 is not conducted, the voltage at the 3 end of the voltage-regulating output is equal to the voltage at the 2 end, and the voltage at the two ends (3, 1) of the voltage-regulating output is equal to the voltage at the two ends (2, 1) of the AC input.

b) When the on-off ratio of S1 is equal to 1: 3, since the step-up ratio of the high frequency step-up transformer is 1: 3, the voltages at the two output terminals (3, 2) of the single switch chopper regulator are equal to the voltages at the two input terminals (2, 1), and the two output terminals (3, 1) of the voltage regulation are equal to zero.

c) When the on-off ratio of S1 is equal to 2: 3, since the step-up ratio of the high frequency step-up transformer is 1: 3, the output terminals (3, 2) of the single switch chopper regulator are 2 times of the voltage of the input terminals (2, 1), and the output terminals (3, 1) of the voltage regulation are equal to the voltage of the input terminals (2, 1).

From the above, it can be seen that: when the boosting ratio of the high-frequency boosting transformer is three times, the voltage at two ends (3 and 1) of the voltage regulation output can be regulated bidirectionally only by continuously and steplessly regulating the on-off ratio of the bidirectional switch S from zero to 2/3, and the voltage regulation range is the voltage at two ends of the positive and negative alternating current input.

From the above, it can be seen that: the utility model discloses compare with the goer's half-bridge bidirectional voltage regulator of same inventor's invention, not only saved 1 two-way electronic switch to still make two-way regulation scope increase 2 times, still replace the power frequency phase inversion autotransformer in the goer's half-bridge bidirectional voltage regulator with high frequency transformer, the utility model discloses have that switch quantity is minimum, the loss is low, with low costs, light in weight and advantages such as small, can extensively be used for equipment that needs to adjust two-way voltage such as alternating current chopping voltage regulation compensation formula alternating current stabilized voltage power supply and UPS power, it is the basic voltage regulator of the two-way pressure regulating of power electronics, its circuit is expected to receive and list power electronics textbook and alternating current stabilized voltage power supply textbook, has great social and economic benefits.

Claims

1. Single switch AC chopper coupling inductance two-way voltage regulator, it is by 1 high frequency transformer T that steps up, 1 two-way switch S, 3 electric capacity C1 ~ C3, 1 inductance coupling inductance Z, 1 inductance L3 and control circuit constitute, S comprises 4 diodes and 1 triode, W2, W2 is T' S the beginning, secondary winding, two-way voltage regulator circuit has 1 AC input voltage regulation output common port (1), 1 AC input end (2), 1 voltage regulation output (3), its characterized in that: z is composed of 2 inductors L1 and L2 wound on the same magnetic core, capacitors C1 and C2 are connected with inductors L1 and L2 in a cross mode, an alternating current input and voltage regulation output common end (1) is connected with one end of a bidirectional switch S, the other end (4) of the bidirectional switch S is connected with one end of an inductor L1 and one end of a capacitor C2, the other end (5) of an inductor L1 is connected with one end of a winding W1 and one end of a capacitor C1, the other end (6) of the winding W1 is connected with the other end of the capacitor C2 and one end of the inductor L2, an alternating current input end (2) is connected with the other end of the inductor L2, the other end of the capacitor C1, one end of the capacitor C3 and one end of the winding W2, the other end (7) of the winding W2 is connected with one end of the inductor.

2. The single-switch ac chopper coupled inductor bi-directional voltage regulator of claim 1, wherein: the number of turns of the secondary winding W2 of the high-frequency transformer T is 3 times that of the secondary winding W1.