DC Capacitor Evaluation

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 …

Evaluation of a current source active power filter to reduce the dc bus capacitor in a hybrid electric vehicle traction drive …

Inverter DC Link Capacitor Selection

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.

Evaluation of DC-link Capacitor RMS Current in Switched …

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 Capacitance Estimation Method for DC-Link Capacitors Based …

A Capacitance Estimation Method for DC-Link Capacitors Based on Pre-Charging Model and Noise Evaluation. Abstract: DC-link capacitor is one of the …

Analysis and Evaluation of DC-Link Capacitors for High-Power …

This paper presents a comprehensive method for the analysis and comparative evaluation of dc-link capacitor applications to minimize the volume, mass, …

Reliability Evaluation and Optimization of Capacitor Bank

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 …

Evaluation of DC-Link Capacitor RMS Current in Switched Reluctance Motor Drive …

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 …

Comparative evaluation of DC-link capacitors for electric vehicle …

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 …

Analytical evaluation of DC capacitor RMS current and voltage …

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 ...

Analytical evaluation of DC capacitor RMS current and voltage …

The sizing of the DC-link capacitor in a three-level inverter is based on the RMS current flowing through it. This paper analyses the DC-link capacitor RMS current …

Analysis and Evaluation of DC-Link Capacitors for High-Power …

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 …

Analysis and Evaluation of DC-Link Capacitors for High-Power-Density Electric Vehicle Drive Systems

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 …

Multitimescale Reliability Evaluation of DC-Link Capacitor Banks …

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 …

Comparative Evaluation of DC-link Capacitor RMS Current Stress …

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 …

Analysis and Evaluation of DC-Link Capacitors for High Power

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

Electrothermal Stress Analysis and Lifetime Evaluation of DC-Link Capacitor …

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 …

Online Monitoring of DC-Link Capacitor in Accelerator Pulsed …

There are three types of capacitors in DC side link applications: aluminum electrolytic capacitors, metalized polypropylene film capacitors, and multi-layer ceramic capacitors. Research has shown that capacitors have the highest failure rate in power electronic devices, with a failure rate of up to 30% [ 1, 2 ].

Comparative evaluation of DC-link capacitors for electric vehicle …

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 ...

A Capacitance Estimation Method for DC-Link Capacitors Based on Pre-Charging Model and Noise Evaluation

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. …

Evaluation of DC-link Capacitor RMS Current in Switched Reluctance Motor Drive …

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 ...

Reliability of DC-link capacitor in pulsed power supply for …

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, …

Evaluation of DC‐link voltage ripple in five‐phase PWM voltage …

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 ...

Comparative evaluation of DC-link capacitors for electric vehicle …

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 …

Transient pulse-based impedance characterisation of DC-link …

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 …

21.6: DC Circuits Containing Resistors and Capacitors

When you use a flash camera, it takes a few seconds to charge the capacitor that powers the flash. The light flash discharges the capacitor in a tiny fraction of a second. Why does charging take … Exercise (PageIndex{1}) When is the potential difference across

Comparative evaluation of DC-link capacitors for electric vehicle …

Abstract: In electric vehicle (EV) drive systems, sizing and selection of DC link capacitors involve tradeoffs among system performance including lifetime, reliability, cost, and power …

Comparative evaluation of DC-link capacitors for electric vehicle application …

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 ...

8.2: Capacitance and Capacitors

This observation will be key to understanding the operation of capacitors in DC circuits. References 1 Inductors are the subject of the next chapter. This page titled 8.2: Capacitance and Capacitors is shared under a CC …

Reliability evaluation for the DC-link capacitor considering mission profiles in …

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 …

Analytical evaluation of DC capacitor RMS current and voltage …

Further, the 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-bridge NPC inverter figure 1 a, single-phase full-bridge NPC inverter …

(PDF) Analysis and Evaluation of DC-Link Capacitors …

This paper presents a comprehensive method for the analysis and comparative evaluation of dc-link capacitor applications to …

Analytical evaluation of DC capacitor RMS current and voltage …

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

Evaluation of DC voltage ripple in three-phase PWM voltage source inverters …

PDF | On Jun 1, 2017, M. Vujacic and others published Evaluation of DC voltage ripple in three-phase PWM voltage source inverters | Find, read and cite all the research you need

Analysis and Evaluation of DC-Link Capacitors for High Power …

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 …

Analysis and Evaluation of DC-Link Capacitors for High Power …

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.

Multitimescale Reliability Evaluation of DC-Link …

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 …

Analysis and Evaluation of DC-Link Capacitors for High Power

6 III.Electrolytic capacitor Electrolytic capacitors are commonly used as the dc-link capacitors due to their large capacitance per unit volume. The ESR model of an electrolytic capacitor is illustrated in Fig. 2 [38], where the resistance R0 accounts for the sum of resistances of foil, tabs, and terminals, R1 ...

Lifetime Extension of DC-Link Capacitors in Three-Level Inverters …

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 …