CN209994281U

CN209994281U - Improved Sepic AC up-down chopper voltage regulator

Info

Publication number: CN209994281U
Application number: CN201822279875.6U
Authority: CN
Inventors: 龚秋声
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-12-30
Filing date: 2018-12-30
Publication date: 2020-01-24
Anticipated expiration: 2028-12-30

Abstract

Improved Sepic AC/AC lifting chopper voltage regulator, it is by AC power supply, load, 2 inductance, 2 electric capacity, 2 two-way switch S1 and S2 and its control circuit are formed, there are AC input end 2, AC output end 3, AC input output common port 1, S1 is by triode and diode composition, S2 is by 2 thyristors composition, 2 thyristor trigger poles have direct current voltage respectively in the positive and negative half cycle of power, as long as adjust the on-off ratio of two-way switch S1 just can adjust the output and go up and down the AC voltage, it compares with current Sepic AC/AC chopper voltage regulator circuit: the method has the advantages of good reliability and cost ratio.

Description

Improved Sepic AC up-down chopper voltage regulator

[ a ] the technical field

The utility model relates to a power electronic converter, especially hand over lift chopper voltage regulator.

[ II ] background Art

The direct current chopper voltage regulator mainly has 6 circuits: the voltage-reducing chopper voltage-regulating circuit, the voltage-increasing chopper voltage-regulating circuit and 4 voltage-increasing chopper voltage-regulating circuits which can increase and reduce voltage are named or invented by foreigners. For example: the improved Buck/Boost single-tube non-isolated direct-current converter provided by Slobodan Cuk of the California academy of engineering, USA has inductors in input and output sections, can obviously reduce the pulsation of input and output currents, and is named as a Cuk lifting direct-current chopping voltage regulator, and a circuit of the Cuk lifting direct-current chopping voltage regulator is compiled in a world textbook, and shows the contribution of the California academy of engineering and Americans to the world power electronic science.

The two bidirectional switches of the conventional Sepic AC up-down chopper voltage regulator are fully-controlled bidirectional switches with the same structure and are subjected to complementary control, the voltage regulation can be realized only by adjusting the on-off ratio of the two fully-controlled switches at the same time, and certain defects exist.

[ third ] summary of the invention

The purpose of this design is to provide a better than current Sepic AC up-down chopper voltage regulator reliability, with low costs improved generation Sepic AC chopper voltage regulator.

In order to achieve the above object, the utility model provides an improved generation Sepic AC and AC boost chopper modulator, it comprises alternating current power supply u, load RL, 2 inductance L1 and L2, 2 electric capacity C1 and C2, 2 two-way switch S1 and S2 and its control circuit, has 3 ends: alternating current input end 2, alternating current output end 3, alternating current input output common terminal 1, S1 comprises 2 triodes and 2 diodes, its characterized in that: the 2 bidirectional switches S1 and S2 are non-complementary control, S2 is composed of 2 thyristors V3 and V4, direct-current voltages are respectively arranged on the 2 thyristors V3 and V4 triggers in the positive half cycle and the negative half cycle of a power supply, the lifting alternating-current voltage can be output only by adjusting the on-off ratio of the bidirectional switch S1, the alternating-current input end 2 is connected with one end of an alternating-current power supply u and 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 C1, the other end 5 of the capacitor C1 is connected with one end of a bidirectional switch S2 and one end of an inductor L2, the alternating-current output end 3 is connected with the other end of the bidirectional switch S2, one end of a capacitor C2 and one end of a load RL, and the alternating-current input-output common end 1 is connected with the other end of.

[ IV ] description of the drawings

FIG. 1 is a main circuit of a Sepic AC-AC step-up-and-down chopper in the prior art. Figure 2 is the utility model provides an improved generation Sepic AC lifting chopper voltage regulator main circuit. Wherein: C1-C4 are capacitors, and L1 and L2 are inductors. S1 and S2 are bidirectional switches. D1-D4 are diodes, and V1-V4 are triodes or thyristors.

Detailed description of the preferred embodiments

The main circuit of the Sepic ac up-down chopper voltage regulator shown in the attached figure 1 is composed of 2 capacitors C1 and C2, 2 inductors L1 and L2, 2 bidirectional switches S1 and S2 and a control circuit thereof, and is characterized in that: 1) the bidirectional switch S1 is composed of 2 diodes D1, D2 and 2 triodes V1, V2. 2) The bidirectional switch S2 is composed of 2 diodes D3, D4 and 2 triodes V3, V4. 3) And the complementary control of S1 and S2 can realize the alternating current lifting chopping voltage regulation by simultaneously controlling 2 bidirectional switches.

Fig. 2 is the utility model provides an improved generation Sepic AC up-down chopper voltage regulator main circuit, it compares with fig. 1, and its innovation point lies in: in one aspect, the bidirectional switch S2 in fig. 2 is composed of 2 thyristors V3 and V4 instead of the bidirectional switch S2 composed of 2 diodes D3 and D4 and 2 transistors V3 and V4 in fig. 1. And the direct current voltage is respectively applied to the trigger electrodes of the thyristors V3 and V4 in the positive half period and the negative half period of the power supply. The reliability of the dry thyristor is far higher than that of a transistor, and the cost of the thyristor module is only one third of that of the transistor module, so that the improvement not only improves the reliability of the chopping voltage regulator, but also reduces the manufacturing cost of the chopping voltage regulator, and the dry thyristor is named as Gong's-Sepic AC boost chopping voltage regulator for difference. On the other hand, the control mode is changed from the complementary control of S1 and S2 in the figure 1 to the non-complementary control in the figure 2, and the magnitude of the lifting alternating current voltage of the alternating current output can be adjusted only by adjusting the on-off ratio of S1.

The utility model discloses an improved generation Sepic AC traffic lift chopper voltage regulator, 2 two way switch S1 and S2 are non-complementary control, as long as adjust 1 two way switch S1 break-make and compare just adjustable output lift AC chopper voltage size, because 2 thyristor V2 and V3' S cost far than 4 triodes and 4 diodes with low costs, the overload capacity is strong, the good reliability. Therefore, the utility model discloses an improved generation Sepic hand over goes up and down to press regulator is good than current Sepic hand over goes up and down to press regulator reliability, and is with low costs.

Claims

1. Improved Sepic AC up-down chopper voltage regulator, it is by AC power source u, load RL, 2 inductance L1 and L2, 2 electric capacity C1 and C2, 2 two-way switch S1 and S2 and its control circuit constitute, have 3 ends: alternating current input end 2, alternating current output end 3, alternating current input output common terminal 1, S1 comprises 2 triodes and 2 diodes, its characterized in that: s2 is composed of 2 thyristors V3 and V4, DC voltages are respectively provided on the 2 thyristors V3 and V4 triggers in the positive and negative half cycles of the power supply, the up-down AC voltage can be output by adjusting the on-off ratio of the bidirectional switch S1, the AC input end 2 is connected with one end of the AC power supply u and one end of the inductor L1, the other end 4 of the inductor L1 is connected with one end of the bidirectional switch S1 and one end of the capacitor C1, the other end 5 of the capacitor C1 is connected with one end of the bidirectional switch S2 and one end of the inductor L2, the AC output end 3 is connected with the other end of the bidirectional switch S2, one end of the capacitor C2 and one end of the load RL, the AC input common end 1 is connected with the other end of the AC power supply u, the other end of the load RL, the other end of.

2. The improved Sepic AC boost chopper voltage regulator of claim 1, wherein: the control modes of the 2 bidirectional switches S1 and S2 are non-complementary control.