CN210469125U

CN210469125U - Improved AC voltage stabilizer for Cuk AC-AC chopper regulation

Info

Publication number: CN210469125U
Application number: CN201822279872.2U
Authority: CN
Inventors: 龚秋声
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-12-30
Filing date: 2018-12-30
Publication date: 2020-05-05
Anticipated expiration: 2028-12-30

Abstract

An improved AC voltage stabilizer for Cuk AC-AC chopper regulation is composed of 2 inductors L1 and L2, 1 capacitor C, 2 bidirectional switches S1 and S2 and their control circuits, 2 AC input terminals (A1, N), 2 voltage-stabilizing output terminals (A2, N), S1 composed of 2 triodes and 2 diodes, or 1 triode and 4 diodes, bidirectional switch S2 composed of 2 thyristors V3, V4, and the thyristor control poles in positive and negative half cycles of power supply respectively have DC trigger voltage, so long as the on-off ratio of bidirectional switch S1 is automatically regulated, AC voltage stabilization is realized. It has no transformer, small volume and light weight.

Description

Improved AC voltage stabilizer for Cuk AC-AC chopper regulation

Technical Field

The utility model relates to an alternating current voltage stabilizer that hand over goes up and down to chop and adjusts.

Background

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

The direct current chopping voltage regulating circuits in chapter 3 on the textbook of the power electronics branch technology are mainly six, the direct current chopping voltage regulating circuits are named by foreigners or surnames of the foreigners, and the improved single-tube non-isolated direct current converter for Buck/Boost proposed by Slobodan Cuk of the California institute of technology in the United states has inductors in input and output sections, can obviously reduce the pulsation of input and output currents, is an improvement on the Buck/Boost circuit, is named as a Cuk circuit, and is compiled on the textbook of the power electronics in the world. The six direct current chopper circuits are corresponding to topology circuits of six alternating current chopper voltage regulators at alternating current chopping, unidirectional switches and diode devices in the direct current circuits are changed into fully-controlled bidirectional switches, and the control modes of two fully-controlled switches are complementary control, so that the topology circuits are the existing alternating current chopping voltage regulation and have the defects of poor reliability, high cost and the like. The utility model discloses improve Cuk interchange chopper voltage regulator, be expected to go into to compile in the interchange chopper chapter of power electronic technology textbook.

Disclosure of Invention

The utility model aims at providing an alternating current voltage stabilizer who does not have the transformer.

In order to achieve the above object, an improved Cuk ac chopper regulated ac voltage regulator is provided, which comprises 2 inductors L1 and L2, 1 capacitor C, 2 bidirectional switches S1 and S2 and a control circuit thereof, and has 2 ac input terminals (a1, N), 2 regulated output terminals (a2, N), and S1 comprising 2 triodes and 2 diodes, and is characterized in that: s2 is composed of 2 thyristors, the trigger poles of the 2 thyristors have direct current voltage respectively in the positive half cycle and the negative half cycle of the power supply, alternating current voltage stabilization output can be realized by only feeding the voltage at the two ends of the voltage stabilization output to control the on-off ratio of the bidirectional switch S1, the first alternating current input (A1) is connected with one end of an inductor L1, the other end (4) of the inductor L1 is connected with one end of a bidirectional switch S1 and one end of a capacitor C, the other end (5) of the capacitor C is connected with one end of a bidirectional switch S2 and one end of an inductor L2, the first voltage stabilization output end (A2) is connected with the other end of the inductor L2, and the second alternating current input end (A1) is connected with the second voltage stabilization output end, the other end of the bidirectional.

Drawings

Fig. 1 is an ac voltage stabilizer designed by the utility model and adjusted by improved Cuk ac up-down chopping. Wherein: a1 is AC voltage input end, A2 is AC voltage-stabilizing output end, N is AC input and output public end, S1 is bidirectional full-control switch, which is composed of 2 triodes V1 and V2 and 2 diodes D1 and D2. S2 is a bidirectional half-controlled switch, which is composed of 2 thyristors V3 and V4. And C is capacitance. L1 and L2 are inductors.

Detailed Description

As can be seen from FIG. 1: the utility model discloses a two-way full control switch S2 among the Cuk AC & AC lifting chopper voltage regulator circuit changes 2 one-way thyristor V3 into two-way half control switch that V4 anti-parallel, and V3 triggers utmost point and adds the direct current in the positive half cycle of power, does not add voltage in the negative half cycle, and V4 triggers utmost point and adds the direct current in the negative half cycle otherwise, does not add voltage in the negative half cycle. The trigger electrodes of 2 thyristors V3 and V4 in the positive half cycle and the negative half cycle of the power supply respectively have direct current voltages, so that regulation is not needed, V3 and V4 are equivalent to diodes in a direct current chopper circuit, and therefore, the following results are obtained:

in the positive half cycle of the power supply, the power supply comprises 1 Cuk direct current up-down chopping voltage regulation circuit with positive voltage, wherein the Cuk direct current up-down chopping voltage regulation circuit comprises inductors L1 and L2, a capacitor C, a triode V1, a diode D2, a thyristor V3 and a control circuit thereof.

When the power supply is in a negative half cycle, the Cuk direct current buck-boost chopper voltage regulator circuit with another 1 negative power supply voltage consists of inductors L1 and L2, a capacitor C, a triode V2, a diode D1, a thyristor V4 and a control circuit thereof.

The 2 Cuk direct-current lifting chopping voltage-regulating circuits form 1 improved Cuk alternating-current lifting chopping voltage-regulating circuit. The alternating voltage at two output ends (A2 and N) can be adjusted by only adjusting the on-off ratio of 1 bidirectional full control switch S1. The skilled person knows that continuous stepless regulation can be realized by only controlling the on-off ratio of 2 triodes V1 and V2 on 1 bidirectional full-control switch S1 by the voltage feedback at the two output ends (A2 and N), the voltage of 2 AC voltage output ends (A2 and N) is stabilized to achieve the purpose of AC voltage stabilization, and the working principle of the circuit is similar to that of a Cuk circuit.

The utility model is characterized in that: the S2 is composed of 2 thyristors V3 and V4, the DC voltage of the trigger electrodes of the 2 thyristors is not required to be adjusted in the positive and negative half cycles of the power supply, and the voltage at the two ends of the voltage stabilizing output is fed back to control the on-off ratio of the bidirectional switch S1 so as to realize the voltage stabilizing output.

The utility model discloses the biggest characteristic of alternating current voltage stabilizer is not to have the transformer, has advantages continuous, stepless, day contact, small, light in weight.

Claims

1. Improved generation Cuk is AC voltage regulator of crossing chopper regulation, it comprises 2 inductance L1 and L2, 1 electric capacity C, 2 bilateral switch S1 and S2 and its control circuit, has 2 alternating current input ends (A1, N1), 2 steady voltage output ends (A2, N2), S1 comprises 2 triode and 2 diodes, or 1 triode and 4 diodes, its characterized in that: s2 is composed of 2 thyristors, 2 thyristor trigger poles have direct-current voltage in positive and negative half cycles of a power supply, voltage feedback at two ends of the voltage stabilization output is only required to control the on-off ratio of the bidirectional switch S1 to realize voltage stabilization output, a first alternating-current input (A1) is connected with one end of an inductor L1, the other end (4) of the inductor L1 is connected with one end of a bidirectional switch S1 and one end of a capacitor C, the other end (5) of the capacitor C is connected with one end of a bidirectional switch S2 and one end of an inductor L2, a first voltage stabilization output end (A2) is connected with the other end of the inductor L2, and a second alternating-current input end (N1) is connected with a second voltage stabilization output end, the other end of the bidirectional switch S1 and the.

2. The improved Cuk AC chopper regulated AC voltage regulator of claim 1, further comprising; the bidirectional switch S2 is composed of 2 thyristors V3 and V4 in anti-parallel connection.