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

N-output single-phase N+1-switch-group MMC inverter and control method of N-output single-phase N+1-switch-group MMC inverter

A switch group and inverter technology, which is applied in the direction of output power conversion device, AC power input conversion to DC power output, electrical components, etc., can solve the problems of increasing engineering costs, and achieve voltage equalization problems, quality improvement, The effect of reducing engineering cost

Active Publication Date: 2014-05-07
SOUTH CHINA UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when N AC lines with different frequencies are connected, 2N MMC converters are required, which greatly increases the engineering cost

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
  • N-output single-phase N+1-switch-group MMC inverter and control method of N-output single-phase N+1-switch-group MMC inverter
  • N-output single-phase N+1-switch-group MMC inverter and control method of N-output single-phase N+1-switch-group MMC inverter
  • N-output single-phase N+1-switch-group MMC inverter and control method of N-output single-phase N+1-switch-group MMC inverter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] In order to further illustrate the content and characteristics of the present invention, the specific implementation of the present invention will be described below in conjunction with the accompanying drawings, but the implementation and protection of the present invention are not limited thereto.

[0020] refer to figure 1 , the N-output single-phase N+1 switch group MMC inverter of the present invention includes a DC power supply U dc , a capacitor bridge arm, a switch bridge arm and N loads; the capacitor bridge arm consists of N+1 capacitors (C 1 、C 2 ,...,C N+1 ) in series, and the switch bridge arm consists of N+1 switch groups (B 1 , B 2 ,...,B N+1 ), the first inductance L 1 and the second inductance L 2 formed in series; the i-th switch group B of the switch bridge arm i consists of n power switching units (SM Bi1 , SM Bi2 ,...,SM Bin ) in series, where the value of i is 1 to N+1; one end of the kth load is connected to the k+1th capacitor C of the...

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 provides an N-output single-phase N+1-switch-group MMC inverter and a control method of the N-output single-phase N+1-switch-group MMC inverter. The inverter comprises a direct current power source, a capacitor bridge arm, a switch bridge arm and N loads. The capacitor bridge arm is formed by N+1 capacitors in a series connection mode, and the switch bridge arm is formed by N+1 switch groups, a first inductor and a second inductor in a series connection mode. The ith switch group of the switch bridge arm is formed by n power switch units in a series connection mode, wherein the i ranges from 1 to N+1. One end of the kth load is connected to the positive pole of the k+1th capacitor of the capacitor bridge arm, and the other end of the kth load is connected to the upper end of the k+1th switch group of the switch bridge arm, wherein the k ranges from 1 to N-1. One end of the Nth load is connected to the positive pole of the N+1th capacitor of the capacitor bridge arm, and the other end of the Nth load is connected to the lower end of the N+1th switch group of the switch bridge arm. According to the inverter, carrier phase-shifting PWM control is adopted, and N n+1-level alternating voltages can be output.

Description

technical field [0001] The invention relates to the field of module combined multilevel (MMC) converters, in particular to an N-output single-phase N+1 switch group MMC inverter and a control method thereof. Background technique [0002] At present, power converters are developing in the direction of miniaturization, high reliability and low loss. Under this trend, there are two directions for improving the converter: reducing passive components or improving the topology of the converter to reduce active components. New progress in the direction of source devices. Compared with the traditional 2N switching converter, the single-phase N+1 switching converter reduces N-1 switches and corresponding driving circuits, and has certain advantages in applications considering cost and volume. However, the two single-phase outputs of the N+1 switching converter are both two-level, and the output AC waveform is relatively poor. In addition, the voltage stress of each switch in the N+...

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): H02M7/483H02M7/5387
Inventor 张波付坚丘东元
Owner SOUTH CHINA UNIV OF TECH
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