Next Article in Journal
Study on Powder Coke Combustion and Pollution Emission Characteristics of Fluidized Bed Boilers
Previous Article in Journal
Feasibility of Continuous Pretreatment of Corn Stover: A Comparison of Three Commercially Available Continuous Pulverizing Devices
Article Menu

Export Article

Open AccessArticle
Energies 2019, 12(8), 1423; https://doi.org/10.3390/en12081423

A Current Reconstruction Strategy Following the Operation Area in a 1-Shunt Inverter System

1
Department of Electrical and Computer Engineering, Pusan National University; Busan 46241, Korea
2
LG Electronics, Changwon 51544, Korea
3
Department of Mechanical Facility Control Engineering, Korea University of Technology and Education, Cheonan, Chungnam 31253, Korea
*
Author to whom correspondence should be addressed.
Received: 15 March 2019 / Revised: 8 April 2019 / Accepted: 11 April 2019 / Published: 13 April 2019
  |  
PDF [9900 KB, uploaded 13 April 2019]
  |  

Abstract

To reduce the cost of the inverter system in home appliances, a method using a shunt resistor at the DC-link can be substituted for a method using two current sensors at the inverter output. However, the minimum time of the active vector is required to sample the accurate current using a 1-shunt resistor. Therefore, many studies have been conducted investigating current reconstruction methods in the unmeasurable region of the current. The conventional methods using voltage injection have some problems such as high THD (Total Harmonic Distortion) and acoustic noise, because the PWM pattern is shifted. In addition, the current reconstruction is inaccurate in a low modulation region. In this paper, the cause of the noise in conventional methods is analyzed and a simple current reconstruction method based on an average current estimation and a current reference is utilized for reducing acoustic noise. In an immeasurable area, especially a low modulation region, an intermittent PWM shift method is proposed to enhance the accuracy of the reconstructed current. Therefore, a control strategy that combines all of the mentioned methods is implemented for the entire operating range. The effectiveness of the proposed methods is verified through the experimental results and the results of sound measurement in an anechoic chamber are included to compare with the acoustic noise. View Full-Text
Keywords: AC motor drive; acoustic noise; current estimation; current reconstruction; intermittent PWM shift; low modulation region; shunt resistor; SVPWM; three-phase inverter AC motor drive; acoustic noise; current estimation; current reconstruction; intermittent PWM shift; low modulation region; shunt resistor; SVPWM; three-phase inverter
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Park, C.-H.; Kim, D.-Y.; Yeom, H.-B.; Son, Y.-D.; Kim, J.-M. A Current Reconstruction Strategy Following the Operation Area in a 1-Shunt Inverter System. Energies 2019, 12, 1423.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top