A Dual-Edge Pulsewidth Modulator for Fast Dynamic Response DC–DC Converters

Ripamonti, Giacomo; Saggini, S.; Corradini, Luca; Rizzolatti, Roberto; Faccio, F.; Michelis, S.; Koukab, Adil; Kayal, Maher

doi:10.1109/tpel.2018.2836385

Cited by 15 publications

(11 citation statements)

References 13 publications

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“…The large block (U1) on the right represents the DC-DC converter. The equivalent circuit model of the DC-DC converter is provided by its designers [8].…”

Section: Effect Of the Common Return Line In Power Transmission Cablementioning

confidence: 99%

Nature of transient currents and voltages in the power chain for a Highly Segmented Fast Detector run by Low Voltage Power Supply

Rahaman,

Thakur,

Maity

et al. 2023

J. Inst.

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Supplying power at low voltage to the front-end electronics of very fast and highly segmented detectors, typical in the experiments at the Large Hadron Collider, involves several issues, including transient currents and voltages. This study investigates a power chain that involves long cables, DC-DC converters, and input filters. Due to the presence of a common ground close to the input of the DC-DC converter, the power chain can run with a lower value of the input supply. It is seen that the capacitor in the input filter plays a significant role in the process of voltage growth at the input of the DC-DC converter. The effects of the ramp during turning ON and OFF the input supply have been studied thoroughly. It is observed that the voltage/current spikes are reduced due to the application of the ramp. It is also observed that the current/voltage, both at the input and the output of the DC-DC converter, goes through some intermediate oscillations due to the existence of threshold voltage for the converters. The choice of the ramp is critical in reducing spikes and should be incorporated into the power supply.

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“…The large block (U1) on the right represents the DC-DC converter. The equivalent circuit model of the DC-DC converter is provided by its designers [8].…”

Section: Effect Of the Common Return Line In Power Transmission Cablementioning

confidence: 99%

Nature of transient currents and voltages in the power chain for a Highly Segmented Fast Detector run by Low Voltage Power Supply

Rahaman,

Thakur,

Maity

et al. 2023

J. Inst.

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“…A naturally sampled PWM (NS-PWM) based on the asymmetric dual-edge carrier is introduced in [32]. An application based on a similar carrier comes from [33].…”

Section: Asymmetric Dual-edge Digital Pulse-width Modulatormentioning

confidence: 99%

High Frequency Passivity Properties of Grid-Connected Admittance With Double-Sampling Asymmetric Dual-Edge Modulator

Cvetanovic

Bonanno

Comacchio

et al. 2022

IEEE Open J. Power Electron.

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Small-signal stability and dynamic interactions among power electronic converters (PECs) and electrical grids are widely analyzed using the impedance-based approach. To reduce such interactions, a desirable feature of PECs is that their admittance exhibits dissipative behavior. Due to control delays, the PEC admittance usually exhibits non-dissipative zones around and above the crossover frequency of the inner control loop, possibly reducing the stability margins of the contemporary electrical grids. This paper proposes the double-sampling asymmetric dual-edge digital pulse-width modulator (ADE-DPWM) as an effective way to improve the passivity properties of the PEC admittance. Even in the digital implementation, the ADE-DPWM features zero delay and almost unity magnitude up to half of the switching frequency. Moreover, this paper examines the influence of ADE-DPWM on the PEC admittance even at higher frequencies, where destabilization of poorly damped grid resonances may be influenced by sampling and pulse-width modulation sidebands. Due to an operating point dependent ADE-DPWM small-signal model, the high-frequency passivity properties highly depend on the steady-state operating point. The analytical predictions are shown to be in excellent agreement with the experimental admittance measurements up to twice the switching frequency for all tested steady-state operating points.INDEX TERMS Admittance, asymmetric dual-edge digital pulse-width modulator (ADE-DPWM), passivity properties, power-electronic converters (PECs), sidebands.

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“…Five VFEs are connected to a single FE card that collects data from the VFEs and transmits to the off-detector electronics using the lpGBT [4] optical transmission system. Also connected to the FE is a low voltage regulator board (LVR), a radiation-hard voltage regulator card based on the bPOL12 DC-DC converter [5]. Off-detector, the Barrel Calorimeter Processor (BCP) card will use high-end FPGAs to form the L1 trigger decision and read out the detector.…”

Section: The Upgraded Ecal Front-end Electronicsmentioning

confidence: 99%

The CMS ECAL upgrade for precision timing measurements at the High-Luminosity LHC

Argiro'¹

2022

Proceedings of 41st International Conference on High Energy Physics — PoS(ICHEP2022)

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The High Luminosity upgrade of the LHC (HL-LHC) at CERN will provide unprecedented instantaneous and integrated luminosities of around 5 x 10 34 cm −2 s −1 and 3000 fb −1 , respectively. An average of 140 to 200 collisions per bunch-crossing (pileup) is expected. In the barrel region of the Compact Muon Solenoid (CMS) electromagnetic calorimeter (ECAL), the lead tungstate crystals and avalanche photodiodes (APDs) will continue to perform well, while the entire readout and trigger electronics will be replaced. The noise increase in the APDs, due to radiation-induced dark current, will be mitigated by reducing the ECAL operating temperature. The trigger decision will be moved off-detector and performed by powerful and flexible FPGA processors. The upgraded ECAL will greatly improve the time resolution for photons and electrons with energies above 10 GeV. Together with the introduction of a new timing detector designed to perform measurements with a resolution of a few tens of picoseconds for minimum ionizing particles, the CMS detector will be able to precisely reconstruct the primary interaction vertex under the described pileup conditions. We present the status of the ECAL barrel upgrade, including time resolution results from beam tests conducted during 2018 and 2021 at the CERN SPS.

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A Dual-Edge Pulsewidth Modulator for Fast Dynamic Response DC–DC Converters

Cited by 15 publications

References 13 publications

Nature of transient currents and voltages in the power chain for a Highly Segmented Fast Detector run by Low Voltage Power Supply

Nature of transient currents and voltages in the power chain for a Highly Segmented Fast Detector run by Low Voltage Power Supply

High Frequency Passivity Properties of Grid-Connected Admittance With Double-Sampling Asymmetric Dual-Edge Modulator

The CMS ECAL upgrade for precision timing measurements at the High-Luminosity LHC

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