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

Method for optimizing light load efficiency of inverter based on inductive current critical continuous control strategy

A critical continuous and inductive current technology, applied in the direction of converting AC power input to DC power output, electrical components, output power conversion devices, etc., can solve the problems of low light load efficiency and inverter efficiency reduction, and achieve improved efficiency , the effect of improving efficiency

Active Publication Date: 2016-11-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF3 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the figure that the lighter the load, the higher the switching frequency of the switch tube in the entire power frequency cycle. Based on the critical continuous control strategy of the inductor current, the switch tube can be turned on at zero voltage, and there is basically no turn-on loss, but the turn-off loss cannot be avoided. The higher the frequency, the greater the turn-off loss, resulting in lower efficiency at light load
attached Figure 4 This is the measured efficiency curve of the inverter based on the inductor current critical continuous control strategy. It can be seen from the efficiency curve that the efficiency of the inverter is reduced by 3.5% under 10% light load compared with full load

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
  • Method for optimizing light load efficiency of inverter based on inductive current critical continuous control strategy
  • Method for optimizing light load efficiency of inverter based on inductive current critical continuous control strategy
  • Method for optimizing light load efficiency of inverter based on inductive current critical continuous control strategy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] attached image 3 As shown, it is the switching frequency change diagram of the high-frequency switching tube within half the power frequency cycle range under different output powers. The lighter the load, the higher the switching frequency, so the greater the turn-off loss, resulting in lower efficiency at light load , with Figure 4 As shown, it is the efficiency of the whole load range of the inverter. It can be seen that under light load, the efficiency decreases obviously. For the critical continuous control strategy of the inductor current, reducing the input bus voltage value can reduce the switching frequency, thereby reducing the turn-off loss and improving the light-load efficiency of the inverter. attached Figure 5 It is the efficiency test curve of the input voltage lowered from 380V to 330V under light load and resistive load of...

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 method for optimizing light load efficiency of an inverter based on an inductive current critical continuous control strategy and belongs to the technical field of power electronic converters. Soft switching-on of an inverter switching element is realized through the inductive current critical continuous control strategy; and a switching frequency of an inverter is directly related to output power and input voltage. Under the condition of a constant input voltage, the switching frequency of the inverter increases with reduction of a load, the switching-off loss is increased, and the light load efficiency of the inverter is reduced. In order to improve the light load conversion efficiency, the switching frequency is reduced and the switching loss is decreased through a method of reducing the input voltage under the condition of a light load, and thus the light load conversion efficiency is improved.

Description

technical field [0001] The invention relates to an inverter light-load efficiency optimization method based on an inductor current critical continuous control strategy, and belongs to the technical field of power electronic converters. Background technique [0002] Grid-connected inverters have broad application prospects in new energy power generation and distributed power generation. Increasing the switching frequency of the inverter is an important trend in the design of grid-connected inverters. A high switching frequency can reduce the size of passive components, which in turn can increase the power density of the grid-connected inverter. However, increasing the switching frequency will not only increase the switching loss, but also bring greater EMI interference. [0003] Soft switching technology can increase the switching frequency while ensuring higher efficiency and lower EMI interference. At present, soft switching technology mainly includes passive soft switchi...

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
IPC IPC(8): H02M7/5387H02M7/5395H02J3/38
CPCH02J3/38H02M7/53873H02M7/5395
Inventor 胡海兵赵阳于波许亚坡
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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