Single-phase two-transistor five-level rectifier based on hybrid h-bridge

A five-level rectifier technology, applied in the direction of irreversible AC power input conversion to DC power output, electrical components, high-efficiency power electronics conversion, etc., can solve the problem of low output voltage level, large number of switch tubes, small harmonic content, etc. problem, to achieve the effect of reducing switching loss, improving work reliability, and increasing power density

CN111030440BActive Publication Date: 2021-05-04CHINA THREE GORGES UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-05-04

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Abstract

A single-phase two-tube five-level rectifier based on a hybrid H-bridge, including a switching tube Q 1 , switch tube Q 2 , one side of the AC power supply Vs is respectively connected to the diode D 1 anode, diode D 2 Cathode, the connection node constitutes the terminal b; the other end of the inductor L and the diode D 3 、D 4 、D 5 、D 6 The connection node of constitutes the terminal a; the switching tube Q 1 Drain and Diode D 1 、D 3 、D 7 The connecting node constitutes the terminal c; the switching tube Q 1 source and diode D 2 、D 4 、D 8 The connection node of constitutes the terminal d; the diode D 8 Anode connection capacitor C 2 The negative electrode constitutes the terminal m; the diode D 11 anode, diode D 12 Cathode, capacitor C 2 The positive electrode is connected to the capacitor C 1 The negative electrode constitutes the terminal n; the diode D 7 Cathode connection capacitance C 1 The positive pole constitutes the terminal p. Endpoint a, endpoint c, endpoint d, and endpoint n constitute four ports of the hybrid H-bridge. The rectifier of the present invention has the advantages of high output direct current voltage, low harmonic content, low switch tube stress, relatively simple control and the like.
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Description

technical field

[0001] The invention relates to a five-level rectifier, in particular to a single-phase two-tube five-level rectifier based on a hybrid H bridge. Background technique

[0002] With the development of power electronics technology, the research and application of multi-level power factor correction circuit has been widely concerned, and the five-level high power factor boost converter is one of the most popular research aspects at present. Using a multi-level converter can reduce the voltage stress of the switching tube on the one hand, thereby reducing the harmonic content, and on the other hand, can increase the operating voltage of the system. For high-power power electronic converters, diode-clamped multilevel converters are widely used, mainly because diode-clamped multi-level converters retain the advantages of two-level converters while reducing switching tube The voltage at both ends further reduces the harmonic content and increases the rectified volt...

Examples

Embodiment Construction

[0049] Such as figure 1 As shown, a single-phase two-tube five-level rectifier based on a hybrid H-bridge, including an inductor L and a switch tube Q 1 , switch tube Q 2 , Diode D 1 ~D 12 , capacitance C 1 , capacitance C 2 . Diode D is connected to one side of the AC power supply Vs 1 anode, diode D 2 a cathode, the connection node forming terminal b;

[0050] The other side of the AC power supply Vs is connected to one end of the inductor L, and the other end of the inductor L is connected to the diode D 3 anode, diode D 4 cathode, diode D 5 anode, diode D 6 Cathode; the other end of the inductor L and the diode D 3 、D 4 、D 5 、D 6 The connected nodes of constitute the endpoint a;

[0051] Switch tube Q 1 The drains are connected to the diode D 1 cathode, diode D 3 cathode, diode D 7 anode; switch tube Q 1 Drain and Diode D 1 、D 3 、D 7 The connected nodes of constitute the endpoint c;

[0052] Switch tube Q 1 The source is connected to the diode D r...