A dc-link capacitor is an important device and the vulnerable electronic part of the train converter. The capacitance decline of the dc-link capacitor is accelerated because of the influence of voltage, current, charge–discharge frequency, temperature, and other factors. This will lead to circuit performance degradation and even capacitor failures. Therefore, …
T1 - Comparative evaluation of DC-link capacitors for electric vehicle application AU - Wen, H. AU - Xiao, W. AU - Wen, Xuhui PY - 2012 Y1 - 2012 N2 - In electric vehicle (EV) drive systems, sizing and selection of DC link capacitors involve tradeoffs among This ...
This paper presents a comprehensive analysis and evaluation of dc-link capacitors in EV inverter systems to improve the power density. The analysis starts with ESR models of both
When sizing a DC link capacitor for inverter applications, the ripple current requirement typically ends up being the limiting factor [1] [2] and drives which capacitor is selected. Ripple current, in this context, is referring to the AC current the capacitor must supply to the power bridges and the motor.
In this article, a method to evaluate the dc-link capacitor rms current of a switched reluctance motor (SRM) drive under different operating conditions is presented. Square current reference in both hard and soft chopping modes of pulsewidth-modulated current control is considered. By approximating the current controller response and using a …
This paper proposes the lifetime extension of DC-link capacitors in three-level inverters based on the neutral-point (NP) current. High-capacity inverters require large-size capacitors to maintain robust DC-link voltage. The proposed method suppresses the ripple current of the DC-link capacitors by replacing the switching states, which are …
DC-link capacitor is one of the significant parts of traction converters. Due to the impact of electrical stress, high temperature and humidity, its capacitance degrades faster than expected. Accurate capacitance estimation is critical to the condition monitoring of DC-link capacitors, which is also the basis of online capacitor life prediction. …
This paper presents a comprehensive method for the analysis and comparative evaluation of dc-link capacitor applications to minimize the volume, mass, …
paper also includes evaluation of DC capacitor voltage ripple as indicated earlier. 2. Derivation of analytical expression for capacitor RMS current Analytical closed-form expressions are derived for the capacitor RMS current pertaining to a single-phase half
Reliability of DC-link capacitor in pulsed power supply for accelerator magnet∗ Jie Wang,1,2,3 Da-Qing Gao,1,3 Wan-Zeng Shen,1 Hong-Bin Yan,1,3, †and Li-Jun Mao1,3 1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China 2School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, …
Capacitors are widely used in power electronic converters to buffer the pulsation power, filter the harmonics and support voltage for stable operation. For these applications where single capacitor can not fulfill the voltage rating or capacitance requirements, capacitor bank is always used as the energy buffer by connecting several …
This paper presents a comprehensive method for the analysis and comparative evaluation of dc-link capaci-tor applications to minimize the volume, mass, and capacitance. Models of equivalent series resistance that are valid over a range of frequency and operating …
This paper focuses on analysisand evaluation of dc -link capacitors in EV inverter systems to improve the power density. The analysis starts with ESR models of both electrolytic …
Evaluation of DC-link voltage ripple in five-phase PWM voltage source inverters eISSN 2051-3305 Received on 22nd June 2018 Accepted on 1st August 2018 E-First on 30th April 2019 doi: 10.1049/joe.2018.8102 ...
Power electronic converters used in electric vehicles (plug-in, hybrid or battery) require a DC-link capacitor to: (i) stabilise DC bus voltage, (ii) reduce commutation loop …
The proposed design scheme using film in places of electrolytic capacitors significantly reduces the capacitor size and improves drive system power density from 2.99kW/L to 13.3kW/, without sacrificing system performance. In electric vehicle (EV) drive systems, sizing and selection of DC link capacitors involve tradeoffs among system performance …
In the railway traction drive system, the reliability of DC-link capacitor banks faces enormous challenges due to the multioperation conditions, the complex physical structures, and the safe operation requirements. Considering these issues, this article proposes a reliability evaluation method of the DC-link capacitors banks to provide a guideline for …
Multi-Timescale Reliability Evaluation of DC-link Capacitor Banks in Metro Traction Drive System.pdf Content uploaded by Wang Huimin Author content All content in this area was uploaded by …
As shown in Fig. 37(a), the DC-Link capacitor occupies almost 50% of the volume of the traction inverter in the 1st Gen Toyota Prius [155] and Tesla Model 3 [156] electric vehicles. The capacitors ...
In this paper a method to evaluate the DC-link capacitor RMS current of a switched reluctance motor (SRM) drive under different operating conditions is presented. Square current ...
DOI: 10.1109/TTE.2020.2974182 Corpus ID: 214064855 Multitimescale Reliability Evaluation of DC-Link Capacitor Banks in Metro Traction Drive System @article{Yao2020MultitimescaleRE, title={Multitimescale Reliability Evaluation of DC-Link Capacitor Banks in Metro Traction Drive System}, author={Bo Yao and Xinglai Ge and …
In this paper a method to evaluate the DC-link capacitor RMS current of a switched reluctance machine (SRM) drive under different operating conditions is presented. Square current reference is considered. Methods are developed for both soft chopping and hard chopping method of current control. A newly proposed simplified flux linkage model is …
A comprehensive method for the analysis and comparative evaluation of dc-link capacitor applications to minimize the volume, mass, and capacitance is presented and an 80-kW permanent-magnet motor drive system is evaluated. In electric vehicle (EV) inverter systems, direct-current-link capacitors, which are bulky, heavy, and susceptible …
This work investigates the comparative assessment of DC-link current ripples in perspective of reduced common mode voltage (RCMV) PWM schemes. The anticipated simultaneous reduction of ripple current on DC-link capacitor and common mode voltage compared to traditional PWM approach is seen to exist in certain regions of operation. This may result …
This paper contributes a comprehensive and comparative study on the DC-link capacitor applications and evaluations to meet the above requirements. The …
In electric vehicle (EV) drive systems, sizing and selection of DC link capacitors involve tradeoffs among system performance including lifetime, reliability, cost, and power density. This paper contributes a comprehensive and comparative study on the DC-link capacitor applications and evaluations to meet the above requirements. The research starts with …
Request PDF | Analytical evaluation of DC capacitor RMS current and voltage ripple in neutral-point clamped inverters | The sizing of the DC-link capacitor in a three-level inverter is ...
DC-link capacitor are a weak component of wind power converters which are proven to have high fault rate in wind turbines. Therefore, correct reliability evaluation of dc-link capacitor is crucial for the reliability improvement and also for cost reduction of wind power technology. Unfortunately, the exiting reliability evaluation methods for power electronic …
In hybrid electric vehicles (HEV), a battery-powered three-phase inverter is used to drive the traction motor. Due to the switching behavior of this inverter, significant harmonic currents are present on the DC side of the inverter. Traditionally, a bulky capacitor is used to filter these harmonics. In this paper, an active filtering method is evaluated to substitute for the …
the dc-link capacitors, which is critical to predict capacitor lifetime. This paper focuses on analysisand evaluation of dc -link capacitors in EV inverter systems to improve the power density.