Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Single-switch high-gain direct current boost converter

A DC boost, high-gain technology, used in conversion equipment without intermediate conversion to AC, photovoltaic power generation, etc., can solve the problems of small output voltage gain, reduced converter efficiency, and large voltage stress of power switch tubes.

Inactive Publication Date: 2012-09-19
ANHUI UNIVERSITY OF TECHNOLOGY
View PDF1 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to obtain the DC bus voltage required by the grid-connected inverter, the photovoltaic or fuel cell arrays are usually connected in series, and then boosted by a BOOST or two-phase interleaved parallel BOOST circuit. The boost ratio of the two structural converters is equal , the output voltage gain is small. When the input voltage is low, in order to achieve a high output voltage, the switch conduction duty cycle will be close to 1, and the voltage stress of the power switch tube is relatively large, which will reduce the conversion on the one hand. The efficiency of the device, and the switching frequency is not easy to further increase

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Single-switch high-gain direct current boost converter
  • Single-switch high-gain direct current boost converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0007] The invention relates to a single-switch high-gain direct-current step-up converter. Such as figure 1 As shown, it includes a DC input power supply (Vin), a power switch tube (T), a boost inductor (L1), a coupled inductor with two windings (L21, L22), five unidirectional rectifier diodes ( D1, D2, D3, D4, D5), three intermediate energy storage capacitors (C1, C2, C3), and one output filter capacitor (C4). The circuit structure is as follows: the positive pole of the DC input power supply (Vin) is connected to one end of the boost inductor (L1), the other end of the boost inductor (L1) is connected to the anode of the unidirectional rectifier diode (D1), and the unidirectional rectifier diode The cathode of (D1) is connected to the end of the same name of a winding (L21) of the coupled inductor, the other end of the winding (L21) of the coupled inductor is connected to the anode of the unidirectional rectifier diode (D3), and the anode of the unidirectional rectifier di...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a single-switch high-gain direct current boost converter, comprising one direct current input power supply source, one power switch tube, one boost inductor, one coupling inductor with two windings, five one-way rectifier diodes, three middle storage capacitors and one output filter capacitor. Compared with the existing direct current boost converter, the single-switch high-gain direct current boost converter has the characteristics of a larger boost transformation ratio under the condition of the same duty ratio, small input current ripple waves, the low voltage stress of the switch tube, a simple structure, convenient control and flexibility and the like, thereby being quite applicable for power generation systems of renewable energy source such as photovoltaic cells or fuel cells, with good application and popularization prospect.

Description

technical field [0001] The invention relates to a DC-DC converter in the field of power electronics, in particular to a single-switch high-gain DC step-up converter. technical background [0002] Due to the influence of environment, temperature and other factors, the output voltage of renewable energy usually fluctuates greatly, and the output voltage level of the monomer is low, while the grid-connected power generation system requires a higher DC bus voltage. In order to obtain the DC bus voltage required by the grid-connected inverter, the photovoltaic or fuel cell arrays are usually connected in series, and then boosted by a BOOST or two-phase interleaved parallel BOOST circuit. The boost ratio of the two structural converters is equal , the output voltage gain is small. When the input voltage is low, in order to achieve a high output voltage, the switch conduction duty cycle will be close to 1, and the voltage stress of the power switch tube is relatively large, which w...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07
CPCY02E10/56
Inventor 胡雪峰李艳
Owner ANHUI UNIVERSITY OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com