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Introduction
This chapter presents three basic types of three-phase AC power converters: three-phase AC-to-DC rectifiers, DC-to-AC three-phase inverters, and three …
Giant energy storage and power density negative capacitance …
Dielectric electrostatic capacitors 1, because of their ultrafast charge–discharge, are desirable for high-power energy storage applications. Along with …
Evaluation of DC-link decoupling using electrolytic or polypropylene film capacitors in three-phase …
The life expectancy and long term reliability of grid-connected three-phase photovoltaic (PV) inverters can be increased by replacing the conventional electrolytic film capacitors by metallized polypropylene film capacitors. This paper presents a detailed evaluation of a three-phase grid-connected PV inverter performance when replacing the electrolytic …
Current fluctuations reduction strategy based on optimal three…
service‐life of the dc‐link electrolytic capacitors in two‐level three‐phase voltage‐source inverter (VSI) system. Differing from the typical SVPWM‐based method that employs two adjacent active voltage vectors and zero voltage vectors to synthesise the reference
Sinusoidal Input Current and Average Speed Control of a Single-Phase Supplied Three-Phase Inverter Drive Without Electrolytic Capacitor
Single-phase supplied variable speed drives are mostly realized as two-stage systems comprising a single-phase PFC rectifier and a three-phase inverter stage. The intrinsic power pulsation of single-phase converters with twice the grid frequency is typically buffered by a bulky electrolytic DC-link capacitor, which is a major drawback concerning converter …
Capacitors
This chapter introduces various capacitors used in three-phase AC converters, the capacitor selection problem relevant to converter and converter …
New three-phase on-board battery charger without electrolytic capacitor …
This paper describes a three-phase two-stage on-board charger for a plug-in hybrid electric vehicle (PHEV). The proposed charger is composed of three identical single-phase modules connected in parallel. Each module has a cascaded structure composed of a high frequency resonant converter with constant switching frequency and …
Advanced Dielectric Materials for Electrostatic Capacitors
2 Techniques for capacitor dielectrics characterization + Show details-Hide details p. 33 –69 (37) Electrostatic capacitors are indispensable components in high voltage pulsed power systems and power electronics. They are widely employed in applications such as ...
A three‐phase three‐level converter with shared flying capacitors
This three-phase topology reduces the stored energy by two-thirds compared with three-level flying capacitor (FC) while keeping the same characteristics. …
Performance Evaluation of Three-Phase Grid-Connected Photovoltaic Inverters Using Electrolytic or Polypropylene Film Capacitors
In grid-connected photovoltaic (PV) power stations, improving the life expectancy and long-term reliability of three-phase PV inverters is urgently needed to match the significantly higher lifetime of the PV modules. A key contribution toward such improvement is replacing the conventional electrolytic film capacitors by metallized …
Dual-Inverter Topology for Single-Phase Supplied Drive Systems without Electrolytic Capacitor
VSD systems often employ three-phase permanent magnet synchronous machines (PMSMs) due to their high torque, low weight, high efficiency, and compactness [6]. Therefore, a power electronic system is required to …
[PDF] Online capacitance estimation of DC-link electrolytic capacitors for three-phase …
A novel online capacitance estimation method for a DC-link capacitor in a three-phase AC/DC/AC PWM converter is prepared. At no load, a controlled AC current with a lower frequency than the line frequency is injected into the input side, which then causes AC voltage ripples at the DC output side. By extracting the AC voltage and …
A Single-Phase Three-Level Flying-Capacitor PFC Rectifier Without Electrolytic Capacitors …
A component-minimized and low-voltage-stress single-phase power factor correction rectifier without electrolytic capacitor is proposed in this paper. Component minimization is achieved by embedding an active pulsating-power-buffering (PPB) function within each switching period, such that typical add-on power electronic circuits for PPB …
DC-Link Electrolytic Capacitors Monitoring Techniques Based on Advanced Learning Intelligence Techniques for Three-Phase …
The reliability of the electronic converter is a vital concern in an industrialized area. Capacitors are critical in electronic converters and are more likely to fail than other electronic gears. Due to aging, the capacitor progressively loses its original quality and capacitance, and the equivalent series resistance escalates. Hence, condition …
A Novel Approach to Reduce Line Harmonic Current for a Three-phase Diode Rectifier-fed Electrolytic Capacitor-less Inverter …
The sizing of the DC link capacitor has become an important factor due to more stringent power density requirements [9][10][11]. In the recent years, three-phase diode rectifiers with SDLC ...
Three-Phase Electrolytic-Capacitor-Less LCC-S WPT System …
Three-Phase Electrolytic-Capacitor-Less LCC-S WPT System With Wide Operation Range Abstract: In order to improve the integration and life time of ac voltage input …
Single-Phase Input Variable-Speed AC Motor System Based on an Electrolytic Capacitor-Less Single-Stage Boost Three-Phase …
This paper presents a single-phase to three-phase adjustable-speed drive (ASD) system, which consists of a diode rectifier and a single-stage boost inverter without electrolytic capacitors (E-caps). The system has no shoot-through issues and gains high reliability due to the shoot-through zero-state regulation method. By using electrolytic capacitors-less …
[PDF] Single-Stage Isolated Electrolytic Capacitor-Less EV …
This converter eliminates the need to use the bulky electrolytic capacitor from the system and at the same time provides DC charging by employing the AC Power Decoupling waveform control method, effectively addressing the power density and reliability related issues commonly associated with the bulky Electrolytic capacitor. In this paper, a …
High power factor control of electrolytic capacitor less current-fed single-phase to three-phase …
A novel single-phase to three-phase power converter based on current-fed topology doesn''t require electrolytic capacitor and large inductance reactor, and output voltage waveforms of the proposed power converter have low PWM components. This paper proposes a novel single-phase to three-phase power converter, which based on current …
Capacitor
Capacitor-run induction motors have a permanently connected phase-shifting capacitor in series with a second winding. The motor is much like a two-phase induction motor. Motor-starting capacitors are typically non …
Energies | Free Full-Text | Control and Design of a Boost-Based Electrolytic Capacitor-Less Single-Phase …
Adjustable-speed drives with single-phase input require a power factor correction front-end, usually implemented by a boost converter, to reduce the current distortion from the uncontrolled rectifier; this stage is then followed by a three-phase inverter. Bulky electrolytic capacitors are used to limit the direct current voltage ripple …
High power factor control for single-phase to three-phase power converter without reactor and electrolytic capacitor
This paper proposes a novel control strategy for IPMSM drive system. The proposed single-phase to three-phase power converter does not require a reactor and an electrolytic capacitor at dc-link, and obtains unity input power factor. The proposed control method improves the source current waveform at any load conditions by using the feedback …
Single-Stage Three-Phase AC-DC Resonant Switched Capacitor LED Driver Without Electrolytic Capacitor and Reduced …
This article proposes a three-phase resonant driver based on the resonant switched capacitor (RSC) for the light emitting diode (LED). The employed LED is chip-on-board (COB) based technology, resulting in a high power density. As the driver provides low current ripple and low flicker, it is not necessary to use electrolytic capacitor. This …