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Current path reconstruction type single-phase five-level rectifier

A current path and rectifier technology, which is applied in the direction of high-efficiency power electronic conversion, AC power input conversion to DC power output, electrical components, etc., can solve the problems of poor reliability of circuit structure, large voltage and current stress of switch tube, etc., to achieve reliable power supply, The effect of reducing difficulty and small size

Pending Publication Date: 2020-07-14
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems that the current five-level topology requires a large number of switching tubes, poor reliability of the circuit structure, and large voltage and current stress of the switching tubes, etc.

Method used

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  • Current path reconstruction type single-phase five-level rectifier
  • Current path reconstruction type single-phase five-level rectifier
  • Current path reconstruction type single-phase five-level rectifier

Examples

Experimental program
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Embodiment Construction

[0039] Such as figure 1 As shown, a current path reconstructed single-phase five-level rectifier, including AC power V S , inductance L, switch tube S 1 , S 2 , S 3 , Diode D 1 -D 8 , capacitance C 1 、C 2 ;

[0040] 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;

[0041] 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 terminal a;

[0042] Diode D 4 cathode, diode D 3 The anodes are all connected to terminal a;

[0043] Switch tube S 1 Drain, Diode D 1 cathode, diode D 7 cathode, diode D 5 Anode, connected to form terminal c;

[0044]Switch tube S 1 source, diode D 2 anode, diode D 8 anode, diode D 6 a cathode, connected to form a terminal d;

[0045] Switch tube S 3 Source, switch tube S 2 Drain connection terminal n;

[0046] Diode D 5 Cathode connection capacitance C 1 Positiv...

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Abstract

The invention relates to a current path reconstruction type single-phase five-level rectifier. The rectifier comprises an alternating current power source VS, an inductor L, switching tubes S1, S2 andS3, diodes D1-D8, capacitors C1 and C2 and a load RL. According to the current path reconstruction type single-phase five-level rectifier of the invention, a plug-in diode uncontrolled rectifier bridge rectifying unit exists in the topological structure of the rectifier, the number of needed switches can be increased or decreased to a certain extent, switching tubes are applied to power factor correction, and therefore, on one hand, a circuit structure is simpler, and on the other hand, circuit control difficulty can be reduced. The rectifier can be widely applied to the field of single-phasesmall and medium-power rectifiers.

Description

technical field [0001] The invention relates to the technical field of multi-level electric energy conversion, in particular to a current path reconstruction type single-phase five-level rectifier. Background technique [0002] With the wide application of power electronics in power systems and daily life, we need to have power electronic devices suitable for different applications. As a commonly used converter type, rectifiers are used in industrial applications according to statistics. Rectifiers account for more than 70% of the actual applications, which requires us to propose circuit structures with high reliability, high power density, and low cost for different applications. The traditional uncontrolled rectification converter structure has high harmonic content in the rectified output current, and the input side filter inductor has a large volume. In order to meet industrial production standards, power factor correction must be performed after rectification. On the o...

Claims

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Application Information

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IPC IPC(8): H02M7/217H02M7/155H02M1/42
CPCH02M7/217H02M7/155H02M1/4208H02M1/0048Y02B70/10
Inventor 马辉鲁海鹏郑凯通
Owner CHINA THREE GORGES UNIV
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