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Series-connected bridge-type impedance network power converter

A technology of power converter and impedance network, which is applied in the direction of converting AC power input into AC power output, output power conversion device, electrical components, etc. At the same time, problems such as soft switching operation can be realized to improve system input performance, reduce volume and weight, and reduce electrical stress.

Active Publication Date: 2011-08-17
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to overcome the disadvantages that the existing power converters cannot have the function of step-up or step-down at the same time, and cannot realize the soft switching operation at the same time. type impedance network for power converters

Method used

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  • Series-connected bridge-type impedance network power converter
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  • Series-connected bridge-type impedance network power converter

Examples

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Embodiment Construction

[0039] Figure 7 It is a schematic diagram of the bridge-type impedance network circuit of the present invention. Such as Figure 7 As shown, the bridge-type impedance network circuit is composed of the first inductance L1, the first capacitor C1, the second inductor L2 and the second capacitor C2 connected in series end to end to form an impedance network, and the network has four connection points: A, P1, B, P2, and the bidirectional switch 33 are diagonally connected to the two connection points A and B of the impedance network to form a bridge-type impedance network circuit. The other two connection points P1 and P2 of the bridge-type impedance network circuit are an input node and an output node, wherein P1 is an input node and P2 is an output node.

[0040] Figure 8 It is a schematic diagram of the structure of the series bridge impedance network power converter. Such as Figure 8 As shown, the series bridge impedance network power converter is composed of a power ...

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Abstract

The invention discloses a series-connected bridge-type impedance network power converter. The series-connected bridge-type impedance network power converter is formed by connecting a first inductor (L1), a first capacitor (C1), a second inductor (L2) and a second capacitor (C2) in series from end to end in turn. A two-way switch (33) is diagonally connected to two connecting points (A and B) of a bridge-type impedance network (12); the input node (P1) of the bridge-type impedance network (12) is connected with the positive electrode of an input side power converter (11); the output node (P2) is connected with the positive electrode of an output side power converter (22); and the negative electrode of the input side power converter (11) is connected with the negative electrode of the output side power converter (22). A load (20) is connected with the middle point of a bridge arm of the output side power converter (22); and a power supply (10) is connected with the middle point of the bridge arm of the input side power converter (11). Different conversion aims can be realized by controlling the topology structure of a bridge through the two-way switch (33).

Description

technical field [0001] The invention relates to a series bridge type impedance network power converter, in particular to a series bridge type impedance network power converter including a bridge type impedance network circuit. Background technique [0002] Power conversion processing such as AC-DC-AC is required in the fields of motor drive, new energy power generation and electric vehicles. Commonly used power conversion technologies include: AC-DC rectification technology and DC-AC inverter technology. The traditional power conversion system uses diode uncontrolled rectification in the AC-DC conversion stage, which will inject harmonics into the power grid and affect the power quality, and the energy can only flow in one direction, from the power supply side to the load side. In order to realize green power conversion, reduce power grid pollution, and improve power utilization efficiency, a power conversion system with high power factor and bidirectional flow of energy is ...

Claims

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Application Information

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IPC IPC(8): H02M1/44H02M5/458
Inventor 许海平
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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