Resonant capacitor short circuit
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8.3: Parallel Resonance
Comparison of Short-Circuit Current Control of Resonant …
Short-circuit fault is one of the serious challenges of resonant switched-capacitor converters (RSCC). By comparing the frequency control and duty ratio control, a …
Short-circuit protection of LLC resonant converter …
This paper has presented two solutions for measuring resonant tank current and short-circuit protection of LLC resonant …
Short-circuit protection of LLC resonant converter using voltages …
This paper describes two methods for the short-circuit protection of the LLC resonant converter. One of them uses the voltage across the capacitor and the …
A Tunable Resonant Circuit Based on Graphene Quantum Capacitor
Here, taking advantage of the gate-tunable physical properties of 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. At the same time, a
Short-circuit protection of LLC resonant converter using voltages across resonant …
the capacitor and the other uses the voltage across the inductor of the resonant tank. These voltages can be processed (integrated or differen- tiated) to recover the resonant tank current.
Short-circuit protection of LLC resonant converter using voltages across resonant …
The methods also allow measuring resonant tank current without breaking high-current paths and connecting the measuring circuit in parallel with the inductor or capacitor of the resonant tank. Practical implementations of these indirect current measurements have been experimentally tested for the short-circuit protection of the …
Short‐circuit protection of LLC resonant converter using voltages …
The short-circuit protection is one of the important issues for the reliability of LLC resonant converter. Many techniques have been presented to protect the LLC converter against …
A Lumped, Resonant Switched Capacitor Converter
Abstract: This paper considers the output short-circuit protection of a Series-Parallel (S-P), switched capacitor converter for interfacing high-power PV farms and/or MV DC micro-grids. A so-called active interrupter can be used to isolate the converter from the fault; however, the inductor associated with this interrupter can used as the resonant inductor …
Ferroresonance evaluation on capacitor voltage transformers
Ferroresonance has been a widely studied area in the last few decades due to the nonlinear behavior and power quality problems it presents. Some power quality problems related to the ferroresonance phenomenon are sustained overvoltage and overcurrent and maintained levels of waveform distortions. The phenomenon can lead to …
Resonance and Tuning Methods
what is known as a parallel-resonant circuit, since the coil and capacitor are in parallel. At B of Fig. 2, the same parts are arranged in a series-resonant circuit. In both in- stances, the reactances must cancel one another for the circuit to resonate. Tuning capacitors take a host of forms. Some are adjusted by means of screwdrivers or ...
Why is a capacitor considered a short circuit at start up?
You are mixing up two different operating regimes for the capacitor. In the case where a constant AC sinusoidal waveform is put across a capacitor the impedance = 1/2.pi.f.C. In the case where a DC voltage is applied to a …
Designing an LLC Resonant Half-Bridge Power Converter
Texas Instruments 3 SLUP263 3-3 Topic 3 A. Configuration Fig. 3a shows a typical topology of an LLC resonant half-bridge converter. This circuit is very similar to that in Fig. 2b. For convenience, Fig. 2b is copied as Fig. 3b with the series elements interchanged, so
Tank circuit design for an LLC resonant converter
Since the resonant capacitance is the easiest to finely tune, assembling the resonant capacitor is the final step in the resonant tank circuit design process. In this example, a 110 nF capacitor bank was made with 5 nF legs such that the resonant frequency is approximately 100 kHz, while ensuring the current in each capacitor is …
Frequency response: Resonance, Bandwidth, Q factor
Sinusoidal Steady State Response of Linear Circuits
Capacitor Bank
Size/status of other capacitors • Short-circuit capacity at the substation/at the cap bank ... For example, at a customer entry point of an industrial installation where the fault level is 2.5 MVA with a 100-kVAr capacitor bank, parallel resonance will take place at 250 ...
LC Circuit: Basics, Formula, Circuit Diagram, and Applications
LC Circuit: Basics, Formula, Circuit Diagram, and ...
Short-Circuit Protection for Resonant Switched-Capacitor …
Short-circuit protection is critical and indispensable for resonant switched-capacitor converter (RSCC) to improve the reliability. Based on comparison of frequency control, duty ratio control and traditional variable frequency variable duty ration control (VFVDC-I), a novel variable frequency variable duty ratio control (VFVDC-II) is …
Adjustable Frequency Quasi-Resonant InverterCircuits Having Short-Circuit SwitchAcross Resonant Capacitor …
First, an equivalently variable resonant capacitor having a short-circuit switch in parallel is described for varying output frequency of the quasi-resonant inverter. Then, two types of adjustable ...
Short-Circuit Protection for Resonant Switched-Capacitor …
Short-circuit protection is critical and indispensable for resonant switched-capacitor converter (RSCC) to improve the reliability. Based on comparison of frequency control, …
An introduction to LLC resonant half-bridge converter
In many applications, such as flat panel TVs, 85+ ATX PCs or small form factor PCs, where the requirements on efficiency and power density of their SMPS are getting tougher and …
A new quasi-resonant inverter with two-way short-circuit switch …
The authors propose a new quasi-resonant inverter that has a two-way short-circuit switch across the resonant capacitor. The proposed inverter has features that its operating …
Q Factor and Bandwidth of a Resonant Circuit
Q Factor and Bandwidth of a Resonant Circuit
New Quasi-Resonant Inverter with Short-circuit Switches across …
Two frequencies are often used in induction heating, that is, a lower frequency f L for preheating and a higher frequency f H for main heating in order to decrease thermal stress. In this case, each of f L and f H is generated by the di ff erent inverter, and f H approximately equals several times to ten times of f L . Then we propose a new quasi …
Parallel Resonance and Parallel RLC Resonant …
Parallel Resonance Circuit Parallel resonance occurs when the supply frequency creates zero phase difference between the supply voltage and current producing a resistive circuit In many ways a parallel resonance …
Short-circuit protection of LLC resonant converter using voltages …
This paper describes two methods for the short-circuit protection of the LLC resonant converter. One of them uses the voltage across the capacitor and the other …
Short-circuit protection of LLC resonant converter using voltages across resonant tank elements …
Short-circuit protection is critical and indispensable for resonant switched-capacitor converter (RSCC) to improve the reliability. Based on comparison of frequency control, duty ...
Short-Circuit Protection for Resonant Switched-Capacitor Converter
Short-circuit protection is critical and indispensable for resonant switched-capacitor converter (RSCC) to improve the reliability. Based on comparison of frequency control, duty ratio control and traditional variable frequency variable duty ration control (VFVDC-I), a novel variable frequency variable duty ratio control (VFVDC-II) is …
Ferroresonance evaluation on capacitor voltage transformers
Therefore, the worst-case scenario of the short-circuit application was verified. Results demonstrate that there is a most critical situation during short-circuits at the CVT''s secondary terminals. ... On the other hand, whereas a circuit comprising a linear inductor and a capacitor is able to present the resonance phenomenon, another type of ...
A new quasi-resonant inverter with two-way short-circuit switch across a resonant capacitor …
First, an equivalently variable resonant capacitor having a short-circuit switch in parallel is described for varying output frequency of the quasi-resonant inverter. Then, two types of adjustable ...
8.3: Parallel Resonance
If the parallel resonant circuit is driven by a current source, then the voltage produced across the resonant circuit (sometimes referred to as a tank circuit) will echo the shape of the impedance magnitude. ... at this frequency, the latter indicating perfect cancellation between the inductor and capacitor (i.e., the circuit impedance is ...
Short-circuit protection of LLC resonant converter using voltages across resonant …
UCC25600). When the voltage on this pin is above 1 V the gate signals turn off. Experimental datafor the capacitor sensing method arepresented in Fig. 6. Experimental data for the inductor sensing ...
Why does a real world capacitor behave like an inductor at …
The self-resonant frequency occurs at the resonant frequency of the ideal cap and series inductor (which form a tank circuit with near zero impedance at resonance). Once you go above resonance frequency, the series inductor dominates the impedance of the component, and the capacitor impedance is so low as to be negligible.