Novel Sepic AC-AC chopping voltage regulation circuit and application thereof

An AC chopper and circuit technology, which is applied in the field of AC up-down chopper and voltage regulation circuit, can solve the problems of high cost and poor reliability.

Pending Publication Date: 2019-03-26
龚秋声
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AI-Extracted Technical Summary

Problems solved by technology

These six topological circuits replace the unidirectional switch and diode in the DC circuit with two fully-controlled bidirectional switches. The control mode of the...
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Method used

Accompanying drawing 3 is a kind of compensation formula AC stabilized voltage power supply of the present invention, and it uses Sepic hand in hand to exchange lifting chopper voltage regulation circ...
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Abstract

The invention relates to a novel Sepic AC-AC chopping voltage regulation circuit comprising an AC power supply, a load, two inductors, two capacitors, two bidirectional switches S1 and S2 and a control circuit. Two AC input terminals (2 and 1) and two AC output terminals (3 and 1) are arranged. The S1 includes a triode and a diode and the S2 is formed by two thyristors. Trigger electrodes of the two thyristors within positive and negative half cycles of the power supply have direct-current voltages; and the output lifting AC voltages can be adjusted by adjusting the break-make ratio of the bidirectional switch S1. Compared with the existing Sepic AC-AC chopping voltage regulation circuit, the novel Sepic AC-AC chopping voltage regulation circuit has advantages of high reliability and low cost. The novel Sepic AC-AC chopping voltage regulation circuit is named as a Gong's-Sepic AC-AC boosting chopping voltage regulation circuit for distinguishing. The novel circuit is expected to becomea circuit represented on the textbook of the power electronics technology to witness the contribution of the Chinese people's inventions to the world's AC-AC chopping control science. The novel SepicAC-AC chopping voltage regulation circuit is used for designing products like a compensation type AC voltage-stabilizing power supply.

Application Domain

Ac-ac conversion

Technology Topic

AC powerCapacitance +15

Image

  • Novel Sepic AC-AC chopping voltage regulation circuit and application thereof
  • Novel Sepic AC-AC chopping voltage regulation circuit and application thereof
  • Novel Sepic AC-AC chopping voltage regulation circuit and application thereof

Examples

  • Experimental program(1)

Example Embodiment

[0007] attached figure 1 It shows the existing Sepic AC up-down chopper voltage regulator circuit, which is composed of 2 capacitors C1 and C2, 2 inductors L1 and L2, 2 bidirectional switches S1 and S2 and their control circuits. Its characteristics are: 1) bidirectional switch S1 It consists of 2 diodes D1, D2 and 2 transistors V1, V2. 2) The bidirectional switch S2 is composed of 2 diodes D3, D4 and 2 triodes V3, V4. 3) Complementary control of S1 and S2, it is necessary to control two bidirectional switches at the same time to realize AC, AC, lift, chopping and voltage regulation.
[0008] attached figure 2 It is an innovative circuit of a Sepic AC lifting chopper voltage regulating circuit of the present invention, which is also composed of 2 capacitors C1 and C2, 2 inductors L1 and L2, 2 bidirectional switches S1 and S2 and their control circuits. In: on the one hand, with figure 2 The two-way switch S2 in the circuit is replaced by two thyristors V3 and V4 figure 1 Two diodes D3, D4 and two transistors V3, V4 in the two-way switch S2. And in the positive and negative half cycles of the power supply, DC voltages are respectively applied to the trigger poles of the thyristors V3 and V4. The reliability of the dry thyristor is much greater than that of the transistor, and the cost of the thyristor module is only one-third of the cost of the transistor module. Therefore, this innovation not only greatly improves the reliability of the Sepic AC lifting chopper voltage regulator circuit, but also greatly reduces The circuit is used for the manufacturing cost of the product, and it is named Gong's-Sepic AC boost chopper voltage regulator circuit to show the difference. On the other hand, the control method is also controlled by the attached figure 1 The S1 and S2 complementary controls are changed to the attached figure 2 The non-complementary control of the non-complementary control, as long as the on-off ratio of S1 can be adjusted to adjust the magnitude of the AC voltage at both ends of the AC output (3, 1).
[0009] attached image 3 It is a kind of compensation type AC stabilized voltage power supply of the present invention, it uses the innovative circuit of Sepic AC lifting chopper voltage regulating circuit to adjust the compensation voltage, and it uses 2 output terminals (A2, N) voltage feedback to control the on-off ratio of the bidirectional switch S1 to stabilize the output voltage.
[0010] In the innovative circuit of the Sepic AC lifting chopper voltage regulating circuit in the present invention, the bidirectional switches S1 and S2 are non-complementary control, as long as the on-off ratio of one bidirectional switch S1 is adjusted, the output lifting AC chopping voltage can be adjusted, because the two thyristors V2 And the cost of V3 is far lower than the cost of 4 triodes and 4 diodes, with strong overload capability and good reliability. Therefore, the innovative circuit of the Sepic alternating current step-up voltage regulation circuit of the present invention, each named as Gong's-Sepic alternating step-up voltage regulation circuit, is expected to be included in the textbook of power electronics technology, which records the Chinese people's understanding of the AC chopping voltage regulation circuit. scientific contributions.
[0011] The Gong's-Sepic AC step-up chopper voltage regulation circuit of the present invention can be widely used in occasions requiring direct step-up and step-down voltage regulation, compensating AC voltage stabilizers and other products.

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