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A Three-Phase Three-Switch Two-Level Rectifier Based on Zero-Voltage Soft Switching

A zero-voltage, soft-switching technology, applied in the field of three-phase three-switch two-level rectifiers, can solve the problems of switching power loss switching noise, cost reduction, etc., to reduce switching losses, prolong service life, and prevent secondary breakdown The effect of destruction

Active Publication Date: 2021-01-22
深圳市瀚仑达实业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem of the present invention is how to use soft switching technology to solve the problem of switching power loss and switching noise caused by traditional hard-switching three-phase active rectifiers when switching power devices operate, and at the same time reduce the cost of traditional three-phase active rectifiers

Method used

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  • A Three-Phase Three-Switch Two-Level Rectifier Based on Zero-Voltage Soft Switching
  • A Three-Phase Three-Switch Two-Level Rectifier Based on Zero-Voltage Soft Switching
  • A Three-Phase Three-Switch Two-Level Rectifier Based on Zero-Voltage Soft Switching

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Embodiment Construction

[0031] Such as figure 1 As shown, a three-phase three-switch two-level rectifier based on zero-voltage soft switching includes a three-phase two-level rectifier circuit, a resonant circuit, and a filter capacitor C. The three-phase two-level rectifier circuit includes a parallel first rectification bridge arm, second rectification bridge arm, third rectification bridge arm, the first rectification bridge arm includes diode D A1 ~D A6 , power switch tube S 1 , capacitance C 1 , Diode D A1 , Diode D A3 , Diode D A4 , Diode D A2 in series, the diode D A5 , Diode D A6 in series, diode D A5 Cathode and Diode D A3 Cathode connection, diode D A6 anode and diode D A4 Anode connection, power switch tube S 1 The drains are connected to the diode D A2 Cathode, capacitor C 1 Connected at one end, the power switch tube S 1 source respectively with diode D A1 anode, capacitor C 1 The other end is connected, the diode D A5 , Diode D A6 Wires are drawn from the connection ...

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Abstract

A three-phase three-switch two-level rectifier based on a zero-voltage soft switch includes a three-phase two-level rectification circuit, a resonance circuit and a filter capacitor C, wherein the three-phase two-level rectification circuit includes a first rectification bridge arm, a second rectification bridge arm, and a third rectification bridge arm that are connected in parallel. Compared with traditional three-phase two-level rectifiers, the three-phase three-switch two-level rectifier omits three full-control power devices and corresponding switch driving circuits, and a high power factor unidirectional rectifier has the advantages of reduced number of power switches, short circuit natural protection, small energy processing of an active switch and the like under the condition of not requiring bidirectional power flow; the two-level rectifier has a large advantage in the case of low output voltage; and in addition, compared with a traditional three-level active rectifier, midpoint voltage of a direct current bus does not need to be controlled, the phenomenon of unbalanced neutral point potential is completely eradicated, and the number of sensors and controllers is reduced.

Description

technical field [0001] The invention belongs to the field of rectifier control, and in particular relates to a soft switch-based three-phase three-switch two-level rectifier. Background technique [0002] With the introduction of the concept of Energy Internet, large-scale distributed power generation, such as the access of photovoltaic power generation and wind power generation systems, and a large number of rectification and inverter equipment have been put into use. The three-phase active rectifier is a power conversion device with high power factor on the grid side and bidirectional flow of energy. It is used in many occasions. However, the PWM rectifiers currently used are generally hard-switching rectifiers. Hard switching will cause switching noise and switching loss. Its extensive use in distributed power generation systems will cause a large amount of energy loss. The cooling equipment cools it down, which not only increases the cost but also reduces the efficiency...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/797H02M7/219H02M1/34
CPCY02B70/10
Inventor 周贤鹏马辉韩笑田鹏辉田宇
Owner 深圳市瀚仑达实业有限公司
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