CN209913713U

CN209913713U - Transformer-free chopped wave AC voltage stabilizer

Info

Publication number: CN209913713U
Application number: CN201822279860.XU
Authority: CN
Inventors: 龚秋声
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-12-30
Filing date: 2018-12-30
Publication date: 2020-01-07
Anticipated expiration: 2028-12-30

Abstract

Transformerless chopper AC voltage stabilizer, it is by 1 inductance L, 1 electric capacity C, 2 bilateral switch S1, S2 and its control circuit constitute, there are 2 AC input end (2, 1), 2 AC output end (3, 1), bilateral switch S1 comprises 2 triodes and 2 diodes, or 1 triode and 4 diodes, bilateral switch S2 comprises 2 thyristors, 2 thyristor trigger poles have direct current voltage respectively in the positive and negative half cycle of power, therefore, as long as the alternating current voltage on 2 AC output end (3, 1) goes 1 bilateral switch S1 on-off ratio of automatic control and realizes transformerless chopper AC voltage stabilization. It has no transformer, small volume and light weight.

Description

Transformer-free chopped wave AC voltage stabilizer

Technical Field

The present design relates to a transformerless chopped ac voltage regulator.

Background

The ac voltage stabilizer is required to raise the ac voltage when the input voltage is lowered and to raise the ac voltage when the input voltage is raised.

Disclosure of Invention

The purpose of this design is to provide a chopper ac regulator without a transformer.

In order to achieve the purpose, the designed transformer-free chopping alternating current voltage stabilizer consists of 1 inductor L, 1 capacitor C, 2 bidirectional switches S1 and S2 and a control circuit thereof, and is characterized in that the transformer-free chopping alternating current voltage stabilizer is provided with 2 alternating current input ends (2 and 1) and 2 alternating current output ends (3 and 5); the S1 is composed of 2 triodes and 2 diodes, or 1 triode and 4 diodes, S2 is composed of 2 thyristors, direct current touch signals are respectively arranged on the 2 thyristor triggers in the positive half period and the negative half period of an input power supply, alternating current voltage stabilization can be realized only by outputting and negatively feeding 2 alternating current voltages to control the on-off ratio of the bidirectional switch S1, the first alternating current input end (2) is connected with one end of the bidirectional switch S1, the other end (4) of the bidirectional switch S1 is connected with one end of an inductor L and one end of a bidirectional switch S2, the first alternating current output end (3) is connected with one end of a capacitor C and the other end of a bidirectional switch S2, and the second alternating current input end (1) is connected with the second alternating current output end, the other end of the inductor L and the other end of the.

Drawings

Fig. 1 is a main circuit of a transformerless ac voltage regulator. Fig. 2 is another main circuit of a transformerless ac voltage regulator. S1 and S2 are bidirectional switches. V1-V4 are triodes or thyristors. D1-D4 are diodes. And C is capacitance. L is inductance.

Detailed Description

In the technical scheme of the design, S1 and S2 are non-complementary control, and direct currents are respectively added to 2 thyristor control trigger electrodes in S2 in the positive half cycle and the negative half cycle of an input power supply, so that 2 thyristors in S2 are equivalent to 2 diodes in 2 Buck/Boost direct current chopper circuits in the positive half cycle and the negative half cycle of the power supply, and triodes in S1 are equivalent to 2 switching triodes in 2 Buck/Boost direct current chopper circuits in the negative half cycle of the input voltage source. The principle of the alternating current-alternating current up-down chopper voltage regulator circuit is similar to that of Buck/Boost direct current chopping voltage regulation.

As can be seen from FIG. 1: the S1 is composed of 2 triodes V1 and V2 and 2 diodes D1 and D2. The S2 is composed of 2 thyristors V3 and V4. The working principle is as follows:

1) a Buck/Boost lifting direct-current chopper voltage regulator circuit of the positive half cycle of an alternating-current power supply is formed by an inductor L, a capacitor C, a triode V1, a diode D2 and a thyristor V3, and positive half cycle lifting wave voltage regulation of the power supply is realized at 2 output ends (3 and 5).

2) A Buck/Boost lifting direct-current chopping voltage regulating circuit of the negative half cycle of an alternating-current power supply is formed by an inductor L, a capacitor C, a triode V2, a diode D1 and a thyristor V4, and the lifting chopping voltage regulating of the negative half cycle of the power supply is realized at 2 output ends (3 and 5).

The two Buck/Boost lifting direct-current chopping voltage-regulating circuits form 1 alternating-current lifting alternating-current chopping voltage-regulating circuit capable of increasing and decreasing output alternating-current voltage.

As can be seen from fig. 2: the S1 is composed of a triode V1 and 4 diodes D1-D4. The S2 is composed of 2 thyristors V3 and V4. The circuit comprises 2 Buck/Boost direct current chopper circuits:

1) a Buck/Boost lifting direct current chopping voltage regulating circuit of the positive half cycle of an alternating current power supply is formed by an inductor L, a capacitor C, a triode V1, diodes D1-D4 and a thyristor V3, and positive half cycle lifting wave voltage regulation of the power supply is realized at 2 output ends (3 and 5).

2) The Buck/Boost lifting direct-current chopping voltage regulating circuit of the negative half cycle of the alternating-current power supply is composed of an inductor L, a capacitor C, a triode V1, diodes D1-D4 and a thyristor V4, and the lifting chopping voltage regulating of the negative half cycle of the power supply is realized at 2 output ends (3 and 5).

The two Buck/Boost lifting direct-current chopping voltage-regulating circuits form another 1 alternating-current lifting alternating-current chopping voltage-regulating circuit capable of outputting an alternating-current power supply to rise and fall.

In the 2 thyristors V3 and V4 shown in fig. 1 and fig. 2, the dc trigger signal is applied to V3 in the positive half cycle of the power supply and the dc trigger signal is applied to V4 in the negative half cycle of the power supply, so that the rising and falling ac voltage at the 2 output terminals (3, 5) can be regulated by regulating the on-off ratio of the bidirectional switch S1. There are the following three output voltages:

1) when the on-off ratio of the bidirectional switch S1 is equal, the ac voltage at the input terminals is equal to the ac voltage at the output terminals:

2) when the on-off ratio is larger than 1, boosting, namely the alternating voltage at the two input ends is lower than the alternating voltage at the two output ends;

3) when the on-off ratio is less than 1, the voltage is reduced, namely the alternating voltage at the two input ends is higher than the alternating voltage at the two output ends;

therefore, the alternating-current voltage-stabilized output voltage can be realized by only controlling the on-off ratio of the bidirectional switch S1 through the alternating-current voltage feedback of 2 output ends (3 and 5) in the figures 1 and 2.

The utility model discloses do not have the transformer in the no transformer chopper AC voltage stabilizer, have advantages such as small, light in weight.

Claims

1. The transformer-free chopper AC voltage stabilizer is composed of 1 inductor L, 1 capacitor C, 2 two-way switches S1, S2 and a control circuit thereof, and is provided with 2 AC input ends (2, 1) and 2 AC output ends (3, 5), and is characterized in that; the S1 is composed of 2 triodes and 2 diodes, or 1 triode and 4 diodes, S2 is composed of 2 thyristors, direct current touch signals are respectively arranged on the 2 thyristor triggers in the positive half period and the negative half period of an input power supply, alternating current voltage stabilization can be realized only by outputting and negatively feeding 2 alternating current voltages to control the on-off ratio of the bidirectional switch S1, the first alternating current input end (2) is connected with one end of the bidirectional switch S1, the other end (4) of the bidirectional switch S1 is connected with one end of an inductor L and one end of a bidirectional switch S2, the first alternating current output end (3) is connected with one end of a capacitor C and the other end of a bidirectional switch S2, and the second alternating current input end (1) is connected with the second alternating current output end, the other end of the inductor L and the other end of the.

2. The transformerless chopped AC voltage regulator of claim 1, wherein; the bidirectional switch S2 is composed of 2 thyristors V3 and V4 in anti-parallel connection.