Electric-Vehicle Power Converters Model-Based Design-for-Reliability

Soldati, Alessandro; Pietrini, Giorgio; Dalboni, Matteo; Concari, Carlo

doi:10.24295/cpsstpea.2018.00010

Cited by 21 publications

(11 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, many mission-profile-based reliability assessment procedures, which incorporate the DfR method and PoF understandings of power electronics, have been proposed and successfully applied for various applications (e.g., wind power converters [84], grid-connected PV inverters [85], variable frequency drives [86], or more electric aircraft [87]). For EV/HEV applications, the main focus has been placed on the reliability evaluation methodology of the power module used within the electrical drive train inverter [88]- [90]. Moreover, a thorough six-step mission-profile-based lifetime estimation procedure, which assesses the reliability of power electronics, both at the component level and the system level, has been proposed in [76].…”

Section: R E L I a B I L I T Y-o R I E N T E D D E S I G N O F P mentioning

confidence: 99%

“…This is achieved through the vehicle's mathematical models that take into account its mechanical parameters (e.g., mass, gear radio, wheel radius, and drag coefficient). The mechanical equations introduced in [90] (and their corresponding coefficients) have been employed, and the resulting speed and torque requirements of the PMSM are presented in Fig. 9.…”

Section: And 5 Respectivelymentioning

confidence: 99%

See 1 more Smart Citation

Reliability of Power Electronic Systems for EV/HEV Applications

et al. 2021

View full text Add to dashboard Cite

The electrification of the transportation sector is moving on at a fast pace. All car manufacturers have strong programs to electrify their car fleet to fulfill the demands of society and customers by offering carbon-neutral technologies to bring goods and persons from one location to another. Power electronics technology is, in this evolution, essential and also in a rapid development technology-wise. Some of the introduced technologies are quite mature, and the systems designed must have high reliability as they can be quite complicated from an electrical perspective. Therefore, this article focuses on the reliability of the used power electronic systems applied in electric vehicles (EVs) and hybrid EVs (HEVs). It introduces the reliability requirements and challenges given for the power electronics applied in EV/HEV applications. Then, the advances in power electronic components to address the reliability challenges are introduced as they individually contribute to the overall system reliability. The reliability-oriented design methodology is also discussed, including two examples: an EV onboard charger and the drive train inverter. Finally, an outlook in terms of research opportunities in power electronics reliability related to EV/HEVs is provided. It can be concluded that many topics are already well handled in terms of reliability, but issues related to complete new technology introduction are important to keep the focus on.

show abstract

Section: R E L I a B I L I T Y-o R I E N T E D D E S I G N O F P mentioning

confidence: 99%

Section: And 5 Respectivelymentioning

confidence: 99%

Reliability of Power Electronic Systems for EV/HEV Applications

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The original idea has been applied to the reliability prediction of PV inverters in [16], and the same approach has been followed by the others [17]- [22]. This method has also been extended to the power converters used in wind turbines [23], motor drives [24], [25], power supplies [26]- [28], and electric aircraft [29] applications. However, the previous research fails to provide a guideline to select an appropriate number of simulations when applying the Monte Carlo method to the reliability assessment of power electronic systems.…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo-Based Reliability Estimation Methods for Power Devices in Power Electronics Systems

Novak¹,

Sangwongwanich²,

Blaabjerg³

2021

IEEE Open J. Power Electron.

View full text Add to dashboard Cite

Monte Carlo simulation has been widely used for reliability assessment of power electronic systems. In this approach, multiple simulations are carried out during the lifetime estimation of the components in power converter, e.g., power devices, where the parameter variations are considered. In the previous mission-profile based reliability assessment methods, the dynamic thermal stress profiles are usually converted into a set of static parameters. However, this simplification may introduce a certain uncertainty during the reliability assessment, since the static parameters may not be able to accurately represent the thermal stress under highly dynamic conditions. Moreover, the previous research did not take into account the correlation between the method of introducing the parameter variation and the required number of Monte Carlo simulations. This can significantly affect both the accuracy and computation burden of the Monte Carlo simulation. To address this issue, an indepth analysis of Monte Carlo simulation applied to reliability assessment of power devices in power electronic systems is provided in this paper. Two additional Monte Carlo simulation approaches based on semi-dynamic and dynamic parameters are proposed, and their reliability evaluation results are compared with the traditional static parameter method. It is demonstrated in a case study of photovoltaic (PV) inverter application that the reliability of power converter can be overestimated up to 30% when using the static parameters.

show abstract

“…Moreover, an increment of 10 • C in the operation mean temperature of a power semiconductor can double its failure-ratio [25]; consequently, special care of inverter thermal management must be taken. Such failures are a consecuence of the mismatches between the coefficients of thermal expansion of the materials that constitute power modules, which suffer from significant thermo-mechanical fatigue during thermal or power cycling [26].…”

Section: Introductionmentioning

confidence: 99%

Novel Thermal Management Strategy for Improved Inverter Reliability in Electric Vehicles

et al. 2020

View full text Add to dashboard Cite

Requirements for electric vehicle (EV) propulsion systems—i.e., power density, switching frequency and cost—are becoming more stringent, while high reliability also needs to be ensured to maximize a vehicle’s life-cycle. Thus, the incorporation of a thermal management strategy is convenient, as most power inverter failure mechanisms are related to excessive semiconductor junction temperatures. This paper proposes a novel thermal management strategy which smartly varies the switching frequency to keep the semiconductors’ junction temperatures low enough and consequently extend the EV life-cycle. Thanks to the proposal, the drivetrain can operate safely at maximum attainable performance limits. The proposal is validated through simulation in an advanced digital platform, considering a 75-kW in-wheel Interior Permanent Magnet Synchronous Machine (IPMSM) drive fed by an automotive Silicon Carbide (SiC) power converter.

show abstract

Electric-Vehicle Power Converters Model-Based Design-for-Reliability

Cited by 21 publications

References 17 publications

Reliability of Power Electronic Systems for EV/HEV Applications

Reliability of Power Electronic Systems for EV/HEV Applications

Monte Carlo-Based Reliability Estimation Methods for Power Devices in Power Electronics Systems

Novel Thermal Management Strategy for Improved Inverter Reliability in Electric Vehicles

Contact Info

Product

Resources

About