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Expandable gain unit type high-capacity DC/DC converter

A high-capacity, converter technology, applied in the field of converters, can solve the problem that the gain unit cannot effectively expand the capacity, and achieve the effect of low voltage and current stress of active devices and high boost capability.

Pending Publication Date: 2020-04-10
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the gain unit of the existing converter cannot be effectively expanded and the capacity is small, the present invention provides an expandable gain unit type large-capacity DC / DC converter

Method used

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  • Expandable gain unit type high-capacity DC/DC converter
  • Expandable gain unit type high-capacity DC/DC converter
  • Expandable gain unit type high-capacity DC/DC converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 As shown, a large-capacity DC / DC converter with an expandable gain unit includes an input module and a gain module, the input module includes a number of input ports, and the gain module includes a number of gain units; the output of the input module The terminal is electrically connected with the input terminal of the gain module, and adapts to different voltage and current stresses by adjusting the number of different input ports and the number of gain units.

[0031] The input module includes an input power supply U in , m power switches S 1 , S 2 ... S m , m inductors L 1 , L 2 ...... L m ;in:

[0032] The input power U in positive and the inductor L 1 One end is electrically connected, the inductance L 1 the other end and the power switch S 1 The drains are respectively electrically connected to the input ends of the gain modules, and the power switch S 1 source to ground, the input supply U in The negative electrode is electrically co...

Embodiment 2

[0045] Such as figure 2 As shown, a large-capacity DC / DC converter with an expandable gain unit includes an input module and a gain module, the input module includes a number of input ports, and the gain module includes a number of gain units; the output of the input module The terminal is electrically connected with the input terminal of the gain module, and adapts to different voltage and current stresses by adjusting the number of different input ports and the number of gain units.

[0046] The input module includes an input power supply U in , power switch S 1 , S 2 , S 3 and S 4 , inductance L 1 , L 2 , L 3 and L 4 ;in:

[0047] The input power U in positive and the inductor L 1 One end is electrically connected, the inductance L 1 the other end and the power switch S 1 The drains are respectively electrically connected to the input ends of the gain modules, and the power switch S 1 source to ground, the input supply U in The negative electrode is electric...

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PUM

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Abstract

The invention relates to an expandable gain unit type high-capacity DC / DC converter, which comprises an input module and a gain module, and is characterized in that the input module comprises a plurality of input end ports, and the gain module comprises a plurality of gain units; the output end of the input module is electrically connected with the input end of the gain module, and different numbers of input end ports and gain units are adjusted to adapt to different voltage and current stresses. The invention provides an expandable gain unit type high-capacity DC / DC converter. High boosting capacity is realized by the aid of the voltage-multiplying unit capacitor with gradually increased voltage, basic gain can be increased by more than multiple times on the original basis when one inputphase number or one gain unit number is increased, and lower voltage and current stress of the active device is obtained by adjusting the input phase number and the gain unit number.

Description

technical field [0001] The invention relates to the field of converters, in particular to an expandable gain unit type large-capacity DC / DC converter. Background technique [0002] In the prior art, there are few studies on DC / DC converters used in large-scale boost applications, and most of the converters have fixed input and output gains and poor scalability. At the same time, they have complex control strategies and low energy transmission efficiency. High disadvantages make it limited in applications such as offshore wind power; there are mainly three types of converters for this problem: one is to use the switched resonant capacitor to achieve high gain through resonance, and at the same time reduce the voltage stress of the power device, but this The method has poor expansibility, complex structure, more switching devices required, high system loss and low energy transmission efficiency. The second is to use coupled inductors to achieve high gain, but the use of coupl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158
CPCH02M3/1584H02M3/1586
Inventor 刘崧武利会曾庆辉刘少辉陈贤熙范心明唐琪黎小龙梁年柏李浩
Owner GUANGDONG POWER GRID CO LTD
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