Cascaded boost DC-DC converter

A DC-DC, step-up technology, used in output power conversion devices, DC power input into DC power output, instruments, etc. The effect of continuous and consistent polarity with the output current, easy to expand

Inactive Publication Date: 2019-02-26
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the problem of current discontinuity inside the combination of Boost or Speic and Zeta in the existing step-up DC-DC converter cascading scheme of "the input and output currents are continuous and the input and output voltages are of the same polarity" and the problems of Cuk and The combination of Cuk has the problem that the input and output do not share the same ground. The present invention provides a cascaded step-up DC-DC converter, which can realize the continuous current between the stages and the common ground of the input and output, so as to expand the DC-DC Types of cascaded converters

Method used

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  • Cascaded boost DC-DC converter

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] refer to Figure 1 ~ Figure 4 , a cascaded step-up DC-DC converter, including a capacitor energy storage module 1 to a capacitor energy storage module n, an inductor L1 to an inductor Ln+1, and a capacitor Co, and the capacitor energy storage module j has a port Vij+, a port Voj+ and the port Gndj, one end of the inductor L1 is connected to the positive end of the DC power supply Vi, the other end of the inductor L1 is connected to the port Vi1+ of the capacitor energy storage module 1, the port Vo1+ of the capacitor energy storage module 1 is connected to one end of the inductor L2, and the inductor L2 The other end of the inductor Ln is connected to the port Vi2+ of the capacitor energy storage module 2, and so on. The other end of the inductor Ln is connected to the port Vin+ of the capacitor energy storage module n, and the port Von+ of the capacitor energy ...

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Abstract

A cascaded boost DC-DC converter includes capacitive energy storage modules 1 to n, inductors L1 to Ln+1, and a capacitor Co. The capacitive energy storage module j further comprises a diode Dj_1, a capacitor Cj_1, a diode Dj_2 and an electronic switch Sj. The electronic switch Sj comprises a diode Dj_3, an N-type MOS transistor Mj_1 and a controller j, the value range of j being 1 to n. The converter has the following working characteristics: simple circuit structure, easy expansion, various applicable control methods, high efficiency, continuous input and output currents, common ground and consistent polarity of output and input voltages, and output voltage Vo greater than or equal to DC power supply voltage Vi.

Description

technical field [0001] The invention relates to a direct current-direct current (DC-DC) converter, in particular to a cascaded step-up DC-DC converter with continuous input and output currents and the same polarity of input and output voltages, which can be used as a high boost Compared with the basic unit to build a multi-input and multi-output DC power system, such as: DC power module parallel system, LED array drive system, distributed photovoltaic power generation system, etc. Background technique [0002] The existing basic DC-DC converters with boost function include Boost converter, Buck-Boost converter, Cuk converter, Sepic converter and Zeta converter. As listed in Table 1, without considering the output capacitor, none of the above five basic DC-DC converters with a step-up function satisfies the requirement of "both input and output currents are continuous and input and output voltages have the same polarity". Require. [0003] [0004] Table 1 [0005] Casc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155
CPCH02M3/155H02M1/007
Inventor 陈怡
Owner ZHEJIANG UNIV OF TECH
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