Judging the quality of high voltage resonant capacitors
In this paper, the working characteristics of the LC series resonant converter are studied. Based on a CCPS with charging voltage of 10kV and charging capacity of 25kVA, a constant current … - Download [PDF]
Research on LC series resonant high voltage capacitor charging …
In this paper, the working characteristics of the LC series resonant converter are studied. Based on a CCPS with charging voltage of 10kV and charging capacity of 25kVA, a constant current …
Design and analysis of series resonant high voltage capacitor …
A compact series resonant high voltage capacitor charging power supply with an average charging power of 12 kW is developed based on full bridge series resonant constant current charging technology to meet the repetitive charging requirement of a high power pulsed generator. The power supply uses supercapacitor pre-storage and full-bridge series resonant …
High Power Resonant Switched-Capacitor Step-Down Converter
High Power Resonant Switched-Capacitor Step-Down Converter Oliver Keiser*, Peter K. Steimer* and Johann W. Kolar** *ABB Switzerland Ltd., Turgi, Switzerland **Swiss Federal Institute of Technology, Zürich, Switzerland Abstract–This paper treats a new type of high power Switched-Capacitor-DC-DC-Converter (SCDDC), which is characterized by resonant …
Analysis and design of composite-structure resonant switched-capacitor ...
Existing voltage equalization topologies based on the switched-capacitor (SC) operate in the hard-switch state with large energy losses and slow balancing speeds. Therefore, a voltage equalization topology derived from a composite-structure resonant switched-capacitor is proposed in this paper. The proposed topology can achieve zero-current operation and …
Frequency response: Resonance, Bandwidth, Q factor
The bandwidth is the difference between the half power frequencies Bandwidth =B =ω2−ω1 (1.11) By multiplying Equation (1.9) with Equation (1.10) we can show that ω0 is the geometric mean of ω1 and ω2. ω0= ωω12 (1.12) As we see from the plot on Figure 2 the bandwidth increases with increasing R. Equivalently the sharpness of the resonance increases with decreasing R.
Half-Bridge LLC Resonant Converter Design Using …
The resonant network consists of a capacitor, leakage inductances, and the magnetizing inductance of the transformer. The resonant network filters the higher harmonic currents. …
Isolated Resonant Switched Capacitor Converter With Voltage …
This article proposes an isolated resonant switched capacitor converter (I-RSCC) for high-voltage applications. The dc capacitors'' voltages achieve self-balancing with the resonant switched capacitor units (RSCUs). The voltage stress of the switching devices is reduced. The isolated rectifier (IR) is used for galvanic isolation and energy transfer. The …
Capacitors: Functions, Types, Uses, and How to Choose the …
Generally, the voltage resistance value of capacitors should be higher than the highest voltage that may occur in the circuit. High-voltage ceramic capacitors have the highest safety, followed by polyester capacitors and high-voltage aluminum capacitors. The lowest voltage resistance is for polymer capacitors and niobium oxide capacitors. 6. Price
High-Q Resonator with Integrated Capacitance for Resonance …
the capacitor required in a typical LC resonant tank. Low-loss NiZn ferrite cores were used to straighten field lines to reduce lateral current crowding. Prototypes of both parallel and series …
Capacitor Solutions for Resonant Converter Applications
High-power resonance capacitors are an important component in magnetic resonance using wireless power transfer EV charging systems. This is because a high-accuracy resonance …
GE HIGH VOLTAGE
Our high voltage capacitors contain hermetically sealed bushings, which permit mounting of the capacitors in an upright position or on their side. GE supplies standard stress designs, and heavy duty designs for increased durability and tolerance of harmonics and transients. GE high voltage capacitors meet IEC ® 60871, IEEE 18 standards; CSA ratings available GE supplies high …
The Cascaded Resonant Converter: A Hybrid Switched-Capacitor …
To realize high efficiency and high power density for resonant switched capacitor (ReSC) converters, it is critical to have a thorough understanding of the soft-switching mechanism and design the ...
How can we measure the quality of a capacitor?
Knowing how to verify quality means you understand what can make them fail and how to measure MTBF. It means accelerated failures with operating near rated voltage, …
High power resonant Switched-Capacitor step-down converter
This paper treats a new type of high power switched-capacitor-DC-DC-converter (SCDDC), which is characterized by resonant switching transitions. This drastically reduces switching losses and opens up the possibility to employ thyristors instead of turn-off power semiconductors. At the same time a larger energy can be transferred per switching …
Constant frequency control of LLC resonant converter …
Introduction. The LLC resonant converter has been widely used for a DC–DC conversion stage of AC line applications because of its wide range of zero voltage switching (ZVS) capability, simple output configuration and …
Influence of standard capacitors on the quality of high voltage …
The parameters affecting the capacitance measurement of compressed gas capacitors which are used as high-voltage standards are investigated. The temperature coefficient of compressed gas ...
A Tunable Resonant Circuit Based on Graphene Quantum Capacitor
graphene, an LC resonant circuit based on graphene quantum capacitors is demonstrated, in which the resonant frequency can be electrically tuned from 1.45 to 1.73 MHz.
INFLUENCE OF STANDARD CAPACITORS ON THE QUALITY …
Pressurized gas capacitors can be used in high-voltage tests as: standards in bridge circuits for capacitance and loss factor measurement; part of potential dividers for high-voltage...
(PDF) Minimum Resonant Capacitor Design of High …
Here, a minimum resonant capacitor design approach is proposed for the insulated-gate bipolar transistor (IGBT)- based high-power LLC resonant converter to improve its comprehensive efficiency in ...
Application Guide for High Power resonant Capacitors
V= Applied RMS voltage Xc= Capacitive reactance =1/(2πfC) C= capacitance in μF f= Operating frequency in kHz Select a capacitance that is equal to or greater than the calculated value. Cooling Power Capacitors High power resonant capacitors are designed to handle large voltages and currents in a small compact package size. As a result of their small size these …
HIGH-PERFORMANCE CAPACITORS TO MEET THE NEEDS …
Energy Storage: MLCCs can be used as resonant capacitors for energy storage that can provide short, but high, bursts of energy when needed. This can be particularly important for high voltage applications. Filtering: MLCCs can be used to filter out unwanted noise and other high-frequency signals that can interfere with the operation of power electronics components. …
Switched-Capacitor LLC Resonant DC-DC Converter with Switch …
A DC-DC hybrid switched-capacitor LLC resonant converter integrating a ladder cell at the input of the LLC resonant converter using frequency modulation is proposed in this paper.
Application Guide for High Power resonant Capacitors
High power resonant capacitors are designed to handle large voltages and currents in a small compact package size. As a result of their small size these capacitors need to be cooled. …
Minimum resonant capacitor design of high‐power LLC resonant …
Minimum resonant capacitor design of high-power LLC resonant converter for comprehensive efficiency improvement in battery charging application. Zhenxing Zhao, Zhenxing Zhao. College of Electrical and Information Engineering, Hunan University, Changsha, Hunan Province, People''s Republic of China . Search for more papers by this author. Qianming Xu, …
Design of series resonant high voltage capacitor charging power …
The high-frequency resonant converter has the advantages of constant charging current and strong anti-load short-circuit capability when used for capacitor …
Looking Closer at Resonant Capacitors in Electric Vehicles
As seen in Figure 2, this resonant tank consists of a resonant capacitor C r, resonant inductor L r, and the transformer''s magnetizing inductance L m – all connected in series. The LLC circuit is responsible for filtering out any higher order harmonics by selectively absorbing maximum power at the specific resonant frequency of the square wave and …
High Q Capacitors – Roles and Specifications
Q factor, or quality factor, ... Resonant Circuits – Critical components in resonant circuits like LC (inductor-capacitor) oscillators and crystal oscillators where high selectivity and frequency stability are required. Knowles Precision Devices has the Right High Q MLCC for You . Knowles Precision Devices offers a range of High Q MLCCs that have a low …
Multi-Ratio Resonant Switched-Capacitor Converters
Multi-phase time-interleaving is a widely used technique in SC converters [1,2,3], which reduces the amount of input current ripple and output voltage ripple .Thus, the output buffer capacitor can be reduced or even removed [] conventional SC converters, a segmentation of the flying capacitors for time-interleaved operation is possible without …
Benefits of MLCC vs Film Capacitors in Resonant …
Voltage & Current Waveforms Applied to the Resonant Capacitor. Figure 2. shows the voltage and current applied to the resonant capacitor. It can be observed that the voltage and current waveforms applied …
Designing an LLC Resonant Half-Bridge Power Converter
output capacitor smooths the rectified voltage and current. The rectifier network can be implemented as a full-wave bridge or center-tapped configuration, with a capacitive output filter. The rectifiers can also be implemented with MOSFETs forming synchronous rectification to reduce conduction losses, especially beneficial in low-voltage and high-current applications. …
Robust Tunability and Newly Emerged Q Resonance of …
The complex resonance of dielectric quality factor Q, combined with a capacitance tunability n higher than 3:1 without any dispersion, was achieved in the voltage …
Resonant switched capacitor voltage multiplier with interleaving ...
If the aforementioned circuits were simply switched capacitor circuits (not resonant) the current peak could be V diff over the resistance in the loop given by the R dson of the switches and the equivalent series resistance (ESR) of the capacitors [21]; however in resonant switched capacitors circuits, it is straightforward to notice that the resonant inductor …
Experimental Evaluation of Capacitors for High Power Resonant …
The resonant capacitor is one of the most important parts of the system due to high effective current that it has to conduct. This paper presents experimental results obtained during the selection of the most adequate capacitor technology for the resonant capacitor. 1. Introduction.
Optimization of High-Efficiency Half-bridge LLC Resonant Converter ...
By means of the circuit normalization of DC gain, resonant current and zero-voltage-switching condition was theoretically analyzed, and the converter key parameters including quality factor, magnetic inductor, resonant inductor and resonant capacitor were optimized. Finally, a prototype 200W LLC converter was designed and built up using the optimization method. The …
The Study of High Voltage AC Generation Using A Series Resonant …
We describe a low voltage open loop control for high voltage capacitor charging circuits. The control is achieved by counting the number of halfcycles from the line supply that are allowed to ...
Design of a Half-bridge (HB) LLC Resonant Converter
The resonant capacitor must be of high voltage type (over 600V). The rectifier circuit produces DC voltage by rectifying alternating current with diodes and capacitive output filter. Instead of diodes, for higher efficiency the synchronous rectifiers are used (power switches Q 3 and Q 4 as shown in Figure 1). The rectifier circuit is usually used in center taped configuration with two …
Design and development of a rapid, high voltage capacitor …
A rapid, high voltage capacitor charging power supply (CCPS) based on a third order resonant converter topology has been proposed, analyzed, and simulated using the PSpice software, and as a proof of concept, a prototype of the 6.0 kV, 6.0 A …
Dry Film Capacitors for High-Frequency Power Electronics
Multiple leads per capacitor termination, hollow bushings, tubes, flat foils, or tab conductors are typical methods. All ECI capacitors intended for high-frequency operation like resonant capacitors, snubbers, feed-through capacitors, and EMI filters employ these increased surface area conductors for terminals and internal construction.