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Input and output common ground active switch capacitor Z-source boost chopper circuit

An active switch, input and output technology, applied in the direction of conversion of DC power input to DC power output, output power conversion device, electrical components, etc., can solve the problems of output voltage amplitude limitation, reduce switch voltage stress, etc., and achieve switch The effect of small stress, small switching duty cycle, and wide application prospects

Pending Publication Date: 2019-05-14
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, all of the above DC / DC converters based on single or multiple Z sources and quasi-Z sources have not significantly reduced the voltage stress of the switch, so the output voltage amplitude is still limited

Method used

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  • Input and output common ground active switch capacitor Z-source boost chopper circuit
  • Input and output common ground active switch capacitor Z-source boost chopper circuit
  • Input and output common ground active switch capacitor Z-source boost chopper circuit

Examples

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Embodiment Construction

[0013] Specific embodiments of the present invention are described below in conjunction with the accompanying drawings, but the implementation of the present invention is not limited thereto. It should be pointed out that if there are symbols or processes that are not specifically described in detail below, those skilled in the art can refer to the prior art realized or understood.

[0014] The basic topology of this example and the voltage and current reference directions of the main components are as follows: figure 1 shown.

[0015] An input and output common ground active switched capacitor Z source step-up chopper circuit, including DC input power V in , the first inductance L 1 , the second inductance L 2 , the first capacitance C 1 , the second capacitance C 2 , the third capacitor C 3 , the first diode D 1 , the second diode D 2 , the third diode D 3 , the fourth diode D 4 , the first switch tube S 1 , the second switch tube S 2 , output capacitance C out ...

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PUM

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Abstract

The invention provides an input and output common ground active switch capacitor Z-source boost chopper circuit, which comprises a direct-current input power supply Vin, a first inductor (L1), a second inductor (L2), a first capacitor (C1), a second capacitor (C2), a third capacitor (C3), a first diode (D1), a second diode (D2), a third diode (D3), a fourth diode (D4), a first switch tube (S1), asecond switch tube (S2), an output capacitor (Cout) and a load. Compared with a Boost converter, the traditional quasi-Z source converter and the like, the chopper circuit of the invention has relatively high voltage gain and relatively low capacitor, switch and diode voltage stress and input and output common ground, and is suitable for occasions of non-isolated high-gain direct-current voltage conversion.

Description

technical field [0001] The invention relates to the field of DC / DC converters, in particular to an input and output common-ground active switching capacitor Z-source step-up chopper circuit. Background technique [0002] In the dual-stage inverter of renewable energy power generation systems such as photovoltaic cells and fuel cells, a DC / DC converter with high voltage gain is required to obtain a higher DC voltage to drive the inverter. Due to the limitations of switch parasitic parameters and withstand voltage capability, it is difficult for traditional DC / DC boost converters to achieve high voltage gain and high output voltage. The voltage gain of the Boost circuit is 1 / (1-D) (D is the duty cycle). In order to obtain a higher voltage gain, the duty cycle needs to be close to 1, and the duty cycle is limited by the parasitic parameters of the switch; its diode and The voltage stress of the switch is equal to the output voltage, and the withstand voltage capability of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07H02M3/156
Inventor 张波陈垣黄子田
Owner SOUTH CHINA UNIV OF TECH
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