A Peak Capacitor Current Pulse-Train Controlled Buck Converter with Fast Transient Response and a Wide Load Range Jin Sha, Duo Xu, Yiming Chen, Jianping Xu and Barry W. Williams S . 2 (a) + ± i L L D C R v o S v p v in i C i o R ESR i C V ref + ± Comparator v o D Q Q D flip-flop P H P L Control Pulse Selector Control Pulse G en rato I C,peak Clock (V ref 0 t v p (n+1)T (n+2)T
Looking at a practical example, consider the peak pulse current versus clamping voltage IV characteristic plots shown in Figure 4. In this example, three options for selecting a TVS diode (TVS 1, TVS 2 and TVS 3) are
Capacitors used in firing sets and other high discharge current applications are discharge tested to verify performance of the capacitor against the application requirements. Parameters such as capacitance, inductance, rise time, pulse width, peak current and current reversal must be
P Peak current The product of the capacitance and the dV/dt. 3.3.1 k 0 Pulse characteristic Characteristic factor of a pulse waveform, indicating its energy content. The maximum admissible k 0 defines the capability of a capacitor to withstand pulses of several current peaks; expressed in V2/μs. 3.3.2 R ins Insulation resistance
1 Input Pulse Current vs Duty Cycle stray inductance in the capacitor current path raises the impedance at the switching frequency to levels that negate their effectiveness. Large bulk capacitors do not reduce ripple voltage. The ESR of aluminum electrolytics and most tantalums are too high to allow for effective ripple reduction. Large input ripple voltage can cause large
This paper presents the reliability testing of film capacitors used within a pulsed electro-mechanical transducer system. Operation is characterised by fast energy transfer from the storage element to a load, leading to typical peak current levels in excess of 10 kA, with pulse widths of a few tens of μs and a nominal repetition frequency of 0.05 Hz.
The new electrolytic capacitors, designed for pulse discharge application, were tested in a low-inductance discharge circuit to evaluate the maximum current extractable, internal inductance of the capacitors (ESL), internal losses of the capacitor (ESR), and the potential lifetimes of the capacitors. The peak currents extracted ranged from 17
Constant capacitance values for large numbers of pulse discharges, even with short pulse rep-etition intervals, ensure constant pulse factors. Low leakage currents, even after long idle
Capacitors used in firing sets and other high discharge current applications are discharge tested to verify performance of the capacitor against the application requirements. Parameters such
Pulse power multilayer ceramic capacitors (pulse power-MLCC) are commonly used in complex composite environments with high overload and high voltage due to their large size and capacitance. In order to study the electromechanical coupling response characteristics of pulse power-MLCC in high-impact and high-voltage composite environments, a split Hopkinson
Pulsed capacitor discharge power converters - CERN
A Peak-Capacitor-Current Pulse-Train-Controlled Buck Converter With Fast Transient Response and a Wide Load Range Abstract: It is known that the ripple-based control of a switching dc–dc converter benefits from a faster transient response than a conventional pulse width modulation (PWM) control switching dc–dc converter. However, ripple-based control
This paper shows how to optimize a hybrid association of electrolytic capacitor and higher frequency technology (polyester for instance) by optimizing the number and the
DOI: 10.1109/TIE.2015.2494851 Corpus ID: 10880008; A Peak-Capacitor-Current Pulse-Train-Controlled Buck Converter With Fast Transient Response and a Wide Load Range @article{Sha2016APP, title={A Peak-Capacitor-Current Pulse-Train-Controlled Buck Converter With Fast Transient Response and a Wide Load Range}, author={Jin Sha and Duo
A high voltage magnetic pulse is designed by applying an electrical pulse to the coil. Capacitor banks are developed to generate the pulse current. Switching circuit consisting
The capacitor current is the current shown minus the power supply current. Listed below the charts are the indicated currents and voltage at the power supply. All results indicate good
In order to achieve fast transient response and ensure the stable operation of a switching dc–dc converter over a wide load range, based on a conventional pulse train (PT) control technique, a peak capacitor current PT (PCC
The new electrolytic capacitors, designed for pulse discharge application, were tested in a low-inductance discharge circuit to evaluate the maximum current extractable, internal inductance
Classically, electrolytic capacitors have been used for dc filter applications. However, the inherent advantages of ''electrolytics'' such as self-healing and high energy density make them an attractive candidate for pulse circuitry. To this end, a new type of electrolytic capacitor has been developed specifically for high peak current applications. Preliminary results of an ongoing research
In order to achieve fast transient response and ensure the stable operation of a switching dc–dc converter over a wide load range, based on a conventional pulse train (PT)
The new electrolytic capacitors, designed for pulse discharge application, were tested in a low-inductance discharge circuit to evaluate the maximum current extractable, internal inductance of the capacitors (equivalent series inductance), internal losses of the capacitor (equivalent series resistance), and the potential lifetimes of the
The capacitor current is the current shown minus the power supply current. Listed below the charts are the indicated currents and voltage at the power supply. All results indicate good performance for both capacitors.
Constant capacitance values for large numbers of pulse discharges, even with short pulse rep-etition intervals, ensure constant pulse factors. Low leakage currents, even after long idle periods, guarantee a large number of pulses per bat-tery charge and enable their use in equipment that is powered by batteries only.
This paper has proposed a methodology, a technology review and preliminary results about the reliability of film capacitors in repetitive high peak current pulsed applications
Pulse capacitors are defined as polypropylene film capacitors for applications that use the stable low dissipation factors required to handle high dV/dt and high ripple currents in power conversion applications. The construction of the pulse capacitor have the following advantages: Single Metalized Film. High energy density
This paper has proposed a methodology, a technology review and preliminary results about the reliability of film capacitors in repetitive high peak current pulsed applications in an application environment characterised by low operational temperatures. It also serves to provide insight and useful design guidelines for future built-in
This paper shows how to optimize a hybrid association of electrolytic capacitor and higher frequency technology (polyester for instance) by optimizing the number and the values of components for both capacitor technologies.
A high voltage magnetic pulse is designed by applying an electrical pulse to the coil. Capacitor banks are developed to generate the pulse current. Switching circuit consisting of Double Pole Double Throw (DPDT) switches, thyristor, and triggering circuit is developed and tested. The coil current is measured using a Hall-effect current sensor
Classically, electrolytic capacitors have been used for dc filter applications. However, the inherent advantages of ''electrolytics'' such as self-healing and high energy density make them an
Capacitor banks are developed to generate the pulse current. Switching circuit consisting of Double Pole Double Throw (DPDT) switches, thyristor, and triggering circuit is developed and tested. The coil current is measured using a Hall-effect current sensor. The magnetic pulse generated is measured and tabulated in a graph.
The magnetic pulse generated is measured and tabulated in a graph. Simulation using Finite Element Method Magnetics (FEMM) is done to compare the results obtained between experiment and simulation. Results show that increasing the capacitance of the capacitor bank will increase the output voltage.
If pulse capacitors are to be used in applications where they are subject to permanent volt-age, this must be taken into consideration in capacitor design. The DC capacitance is the decisive factor for the energy yield. This characteristic is approximately 1.2 times the AC capacitance.
Abstract: A new type of electrolytic capacitor has been developed specifically for high-peak-current applications. Preliminary results of an ongoing research effort to determine the operational characteristics of this new type of electrolytic capacitor are reported.
Generally, the design of pulse capacitors can be optimized to customer demands. There-fore, actual values can differ greatly from the typical values listed above. Depending on customer requirements, capacitor designs with improved individual values are available on request.
Conclusions High voltage magnetic pulse has been developed by applying high voltage capacitor bank. The pulse current rise and fall time is dependent on the values of R, L and C in the circuit. The coil current is proportional to the applied voltage and capacitance. 6. Recommendation
We are deeply committed to excellence in all our endeavors.
Since we maintain control over our products, our customers can be assured of nothing but the best quality at all times.