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Showing 1 to 20 of 25 for “"Dc-link Capacitor"”.
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A Brushless DC Motor Drive Without a DC Link Capacitor
… context of industrial motor drives, Brushless DC (BLDC) and Permanent Magnet Synchronous (PMS) motors have become popular as energy efficient and reliable alternatives for induction motors. Both BLDC and permanent magnet synchronous motors are electronically commutated based on the position of …
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A MAXIMUM POWER POINT TRACKING TECHNIQUE FOR SINGLE-PHASE PHOTOVOLTAIC SYSTEMS WITH REDUCED DC-LINK CAPACITOR
Electrolytic capacitors used in photovoltaic (PV) power conditioning units (PCU) for power decoupling purposes are less reliable in nature. Film capacitors can be adopted instead of electrolytic capacitors if the energy storage requirement of the PCU is reduced, since they offer better reliability …
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Back to Back Active Power Filter for Multi-Generator Power Architecture with Reduced dc-link Capacitor
… dependency is improved. The number of required dc-link capacitors is reduced by half by introducing a back to back configuration and the capacitor size is reduced by adjusting the phase angle difference of genset to cancel out the most significant voltage harmonics in the shared dc-link bus. The …
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A Virtual Space Vectors based Model Predictive Control for Three-Level Converters
… of a term dedicated specifically to control the dc-link capacitor voltages such that the neutral-point voltage (NP-V) oscillations are minimized, must be designed. Nevertheless, selecting proper weighting factors for the multiple control objectives is difficult and time consuming. Additionally, …
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Design of an Arbitrary Waveform Generator for Power System Perturbation
… energy from the system under test stored in a DC link capacitor. Sinusoidal, square (pulse), and chirp perturbation waveforms are explored. Results from a constructed realization of the design are presented, and the limits of the device characterized. The maximum achievable perturbation power …
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Integration of Filter Elements in Electric Drives
… thereby reduce the filter requirements of the dc-link capacitor. This is shown in permanent magnet synchronous machine drive simulation.
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Novel Voltage Control Methods for quasi-Z-source Network Converters with Focus on Fixed DC-Link Voltage, Constant- Frequency and Soft-Switching Operation
… central challenge, however, is the intermediate DClink capacitor: its voltage varies with operating conditions. Low DC-link voltage drives high full-bridge current, elevating conduction and turn-off losses; high DC-link voltage raises switch stress and device cost. These fluctuations complicate …
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Direct Torque Control for Silicon Carbide Motor Drives
… response as the conventional DTC. The unbalanced DC-link is an intrinsic issue of the T-type inverter, which may also lead to higher torque ripple. To address this issue, a novel DTC algorithm, which only utilizes the real voltage space vectors and the virtual space vectors (VSVs) that do not …
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Correcting Current Imbalances in Three-Phase Four-Wire Distribution Systems
… H-bridge inverters that all share the same dc-link capacitor. Each of these inverters performs independently using a single-phase rotating reference frame controller. Each either draws or injects current onto the distribution system lines to balance the active currents and performs power …
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Design and Optimization of a High Power Density Silicon Carbide Traction Inverter
… a 3-phase silicon carbide based 150-kW 25 kW/L DC-AC power conversion unit capable of operation with coolant temperatures up to 90°C. The project goals were met and exceeded by first analyzing the established inverter topologies to find which one would yield the highest power density while still …
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GaN-Based High-Efficiency, High-Density, High-Frequency Battery Charger for Plug-in Hybrid Electric Vehicle
… and shrink passive components. An innovative DC link reduction technique is proposed and several practical design issues are solved. A multi-chip-module (MCM) approach is used to integrate multiple GaN transistors into a package that enables fast, reliable, and efficient switching. The …
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Indirect Matrix Converter as Standard Power Electronic Interface
… the energy storage component in the way of a dc-link capacitor for the energy conversion process. This contributes to reduce size and weight, and potentially, increase reliability of the power electronic interface. Two main new contributions are presented. First, a new power electronic …
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Dynamic Aggregation of Grid-tied Inverters
… power point tracking (MPPT) algorithm, and a dc-link capacitor are incorporated into the three-phase inverter model. Furthermore, a network-cognizant aggregation approach for distribution networks comprising grid-tied inverters is developed. Inverters are clustered based on effective …
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Ac-dc Bus-interface Bi-directional Converters in Renewable Energy Systems
… covers several issues related to the ac-dc bus-interface bi-directional converters in renewable energy systems. The dissertation explores a dc-electronic distribution system for residential and commercial applications with a focus on the design of an ac-dc bi-directional converter for …
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Variable speed constant frequency power conversion with permanent magnet synchronous and switched reluctance generators
… are measures such as mechanical and electrical links for such purposes. Electrical link systems are chosen in this study due to their fast responses and high reliabilities. The power conversion stage may be a dc link with a line-commutated converter, a dc link with a self-commutated inverter, or …
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Space Vector Modulation and Control of Multilevel Converters
… system that can match slowly varying dc voltage and dc current on the super conductive magnet side with the ac voltages and ac currents on the utility side. At the same time the power conditioning system was required to provide a bi-directional power flow to the superconductive magnet. …
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Comparison and Design of High Efficiency Microinverters for Photovoltaic Applications
… harvesting efficiency. Since PV sources are DC sources power conversion stages have to be used in order to interface this power to the existing electrical utility system. The structure of large scale PV systems usually consists of several PV panels connected in series to achieve a high input …
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Design of a grid-tied inverter and LCL filter for photovoltaic application
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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Grid current control methods for MV wind energy conversion systems
… and an essential task at first. Including the DC-link capacitor, grid converter, LCL filter and PCC voltage, the modelling of these parts is built in chapter 3. Besides, one scaled experiment low voltage system setup is designed and introduced as well, which will be used for experimental …
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Soft Switching Control and Loss Analysis for High Frequency Power Converters
… due to the need for bulky filter inductors and capacitors. Wide bandgap (WBG) power semiconductor devices are considered game-changing devices to overcome the limitation posed by traditional Si counterparts, enabling us with much higher switching speed and lower switching loss. However, when the …
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