Results 221 to 230 of about 1,602 (246)

Investigation of performance of UPFC without DC link capacitor

Electric Power Systems Research, 2008
This paper presents an analysis of the dynamic operation of unified power flow controller without DC link capacitor. In this scheme of UPFC the shunt converter present in the static synchronous compensator is operated as a current source rectifier, which maintains a fixed DC voltage and DC current on the DC link without capacitor.
B. Geethalakshmi, P. Dananjayan
openaire   +1 more source

Verification of frequency converter with small DC-link capacitor

2005 European Conference on Power Electronics and Applications, 2005
Traditionally, large DC-link capacitors have been used in voltage source inverters. By using MPPF-type capacitor the line current harmonic content is improved and the unreliable electrolytic capacitor can be omitted. In this paper, the dynamic behavior of an inverter with small DC-link capacitor has been studied by simulations and laboratory tests.
H. Saren, O. Pyrhonen, J. Luukko, O. Laakkonen, K. Rauma   +4 more
openaire   +1 more source

Line harmonics on systems using reduced DC-link capacitors

IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013
As in all industrial sectors, drives for AC motors are constantly pushed for improvement. Drives using a reduced capacitance for DC-link filtering have gather attention in recent years as a way not only to increase the drives life-time but also to improve the line harmonics while, due to the increased computing capabilities, maintaining a reasonably ...
Delpino, Hernan Miranda, Kumar, Dinesh
openaire   +2 more sources

Single phase VSI with reduced-size DC-link capacitor

4th International Conference on Power Engineering, Energy and Electrical Drives, 2013
This paper presents a voltage source inverter in a single phase system for photovoltaic applications. The singlephase H-Bridge is augmented by an additional leg from which greater degree of freedom has been achieved in terms of modulation strategy. This new topology demonstrates the feasibility to avoid the double line frequency ripple, which commonly ...
Bingsen Wang, United States, Yantao Song
openaire   +1 more source

DC link capacitor optimization for integrated modular motor drives

2017 IEEE 26th International Symposium on Industrial Electronics (ISIE), 2017
In this paper, selection of optimum DC link capacitor for Integrated Modular Motor Drives (IMMD) is presented. First, a review of IMMD technologies is given and current research and future prospects are studied. Inverter topologies and gate drive techniques are evaluated in terms of DC link performance.
Mesut Ugur, Ozan Keysan
openaire   +1 more source

Condition Monitoring of DC Link Electrolytic Capacitors in Adjustable Speed Drives

2007 IEEE Industry Applications Annual Meeting, 2007
A new preventive maintenance strategy for the sensorless condition monitoring of inverter dc-link aluminum electrolytic capacitors based on equivalent series resistance (ESR) and capacitance C estimation is proposed. The main concept of the proposed method is to estimate the ESR and C of the capacitor, using the inverter whenever the motor is stopped ...
null Kwang-Woon Lee, null Myungchul Kim, null Jangho Yoon, null Sang Bin Lee, null Ji-Yoon Yoo   +4 more
openaire   +1 more source

Regulated DC link voltage with smaller DC link capacitor in Peng's generalized theory of instantaneous reactive power

2011 IEEE Trondheim PowerTech, 2011
This paper investigates Peng's control strategy in harmonics compensation with the aim to reduce the size of DC link capacitor. A simple design is proposed to achieve the goal, i.e. implementing a DC voltage regulator to estimate the power loss of the converter and feedback that losses into the original Peng's control strategy. A three-phase, four-wire
C. L. Toh, M. Molinas, L. E. Norum
openaire   +1 more source

Single-Phase Grid-Connected Motor Drive System With DC-Link Shunt Compensator and Small DC-Link Capacitor

IEEE Transactions on Power Electronics, 2017
The single-phase diode rectifier system with small dc-link capacitor shows wide diode conduction time and it improves the grid current harmonics. By shaping the output power, the system meets the grid current harmonics regulation without any power factor corrector or grid filter inductor.
Hojoon Shin, Young-Ho Chae, Yeongrack Son, Jung-Ik Ha   +3 more
openaire   +1 more source

Early diagnosis in DC-link capacitors: electrolytic and films

2018
This chapter presents an RUL prediction algorithm based on accelerated life test data and derived physics models for electrolytic capacitors. The main elements are (1) development of the first principles based degradation models; (2) the implementation of a Bayesian-based health state tracking and RUL prediction algorithm based on the Kalman filtering ...
Chetan Kulkarni, José Celaya, Kai Goebel   +2 more
openaire   +1 more source

DC Link Capacitor Active Discharge by IGBT Weak Short Circuit

SAE International Journal of Advances and Current Practices in Mobility, 2019
<div class="section abstract"><div class="htmlview paragraph">DC link active discharge is mandatory in new energy vehicles. This paper first analyzes the necessity of active discharge in automotive inverters and then introduces the commonly used discharge methods.
Zhihong Wu, Xiezu Su, Yuan Zhu, Mingkang Xiao   +3 more
openaire   +1 more source