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Reliability of DC-link capacitors in power electronic converters [PDF]
, 2015 DC-link capacitors are widely used in power electronic converters to balance the instantaneous power difference between the input source and output load and to minimize voltage variation in the DC-link. In some applications, they are also used to provide energy storage. Figure 3.1 shows some typical configurations of power electronic conversion systems
Huai Wang, Wang, Huai
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A VEN Condition Monitoring Method of DC-Link Capacitors for Power Converters
IEEE Transactions on Industrial Electronics, 2019The dc-link capacitors are important components that tend to be one of the weakest part of power converters. Thus, it is necessary to monitor the aging parameters of dc-link capacitors in valuable power electronic systems. This paper proposes a simple yet effective variable electrical network (VEN) condition monitoring method for dc-link capacitors in ...
Xiong Du, Yu Wu
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The impact of grid unbalances on the reliability of DC-link capacitors in a motor drive [PDF]
2017 IEEE Energy Conversion Congress and Exposition (ECCE), 2017 DC-link capacitor is one of the reliability-critical components in motor drive applications, which contributes to a considerable cost, size and failure. Its reliability performance depends on both inherent physical strength and external loading. The grid unbalances could alter the electro-thermal stresses of key components in a motor drive.
Wang, Huai +4 more
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Voltage Balancing of the DC-Link Capacitors in Three-Level T-Type Multiphase Inverters [PDF]
IEEE Transactions on Power Electronics, 2022 This paper illustrates an algorithm to balance the voltages across the DC-link capacitors of a three-level multiphase inverter feeding a star-connected load with an odd number of phases.
Luca Zarri +2 more
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An Overview of Condition Monitoring Techniques for Capacitors in DC-Link Applications [PDF]
IEEE Transactions on Power Electronics, 2021 Capacitors are widely used in dc links of power electronic converters to balance power, suppress voltage ripple, and store short-term energy. Condition monitoring (CM) of dc-link capacitors has great significance in enhancing thereliability of power ...
Frede Blaabjerg +2 more
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Design of Neutral-Point Voltage Controller of a Three-Level NPC Inverter With Small DC-Link Capacitors [PDF]
IEEE Transactions on Industrial Electronics, 2013 A neutral-point-clamped three-level inverter with small dc-link capacitors is presented in this paper. The inverter requires zero average neutral-point current for stable neutral–point voltage.
Stig Munk-Nielsen +2 more
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Maximum Virtual Inertia From DC-Link Capacitors Considering System Stability at Voltage Control Timescale [PDF]
IEEE Journal on Emerging and Selected Topics in Circuits and Systems, 2021 In power electronics-dominant systems (PEDSs), the declining-inertia issue is one of the most significant challenges to tackle. The inertia emulation from DC-link capacitors is one cost-effective and application-friendly solution to enhance the system ...
Frede Blaabjerg +2 more
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Lifetime Prediction of DC-Link Capacitors in Multiple Drives System Based on Simplified Analytical Modeling [PDF]
IEEE Transactions on Power Electronics, 2021 Lifetime prediction of dc-link capacitors in a single drive has been discussed before, which indicates that the capacitor in a standard drive meets serious reliability challenges and in a slim drive does not.
Xiangtian Deng +2 more
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A Transient-Modeling-Based Grey-Box Method for Online Monitoring of DC-Link Capacitors [PDF]
IEEE Transactions on Power Electronics, 2023 This article proposes a suitable grey-box method for online monitoring of dc-link capacitors. It is found that the transient behavior of dc-link voltage in ac/dc and dc/dc converters is similar to the zero-state response of a parallel resistor-inductor ...
Frede Blaabjerg +2 more
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A study on the effect of DC-link decoupling capacitors
IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society, 2017DC-link capacitors are usually utilized in voltage source converters to stabilize the DC-link voltage and suppress the transmission of current harmonics into the power grid. To guarantee the reliability of voltage source converters, in addition to select the DC-link capacitors with optimum capacitance, appropriate rated voltage and enough ripple ...
Lei Li +5 more
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