scholarly journals A Current Sharing Using Switched-Capacitor ZVS Driver for Power LEDs

2012 ◽  
pp. 811-816
Author(s):  
P.H.A. Miranda ◽  
E.M. Sá Jr. ◽  
F.L.M. Antunes
Keyword(s):  
Switched Capacitor ◽  
Current Sharing ◽  
A Current

scholarly journals Enhanced Circular Chain Control for Parallel Operation of Inverters in UPS Systems

2020 ◽  
Vol 12 (19) ◽  
pp. 8062 ◽  
Author(s):  
Mahdi Shahparasti ◽  
Mehdi Savaghebi ◽  
Majid Hosseinpour ◽  
Navid Rasekh
Keyword(s):  
Control Structure ◽  
Parallel Operation ◽  
Nonlinear Loads ◽  
Uninterruptible Power Supply ◽  
Loop Control ◽  
Current Sharing ◽  
Circular Structure ◽  
Uninterruptible Power ◽  
Equal Power ◽  
A Current

In this paper, a current sharing method based on the circular chain control (3C) method is proposed for controlling parallel inverters of unequal ratings in uninterruptible power supply (UPS) applications. Due to its circular structure, 3C is one of the most convenient methods which can be used in UPS as well as microgrid systems. However, the conventional 3C control strategy is only applicable to inverters of equal power ratings. The proposed method not only retains the circular structure of the 3C method, but also provides adaptability for the parallel operation of inverters with different power ratings. Moreover, this method adds hot-swap capability to the parallel inverter. A two-loop control structure is used to control the inverters. For proper current sharing, currents of inverters are conveyed in a circular structure with appropriate gains through control links. Simulation and experimental results for linear and nonlinear loads verify the effectiveness of the proposed strategy.

A Current-Sharing Interface Circuit With New Current-Sharing Technique

2005 ◽  
Vol 20 (1) ◽  
pp. 35-43 ◽  
Author(s):  
D.K.-W. Cheng ◽  
Y.-S. Lee ◽  
Y. Chen
Keyword(s):  
Interface Circuit ◽  
Current Sharing ◽  
A Current

scholarly journals Vertical Stacked LEGO-PoL CPU Voltage Regulator

2021 ◽  
Author(s):  
Minjie Chen
Keyword(s):  
Output Voltage ◽  
Input Voltage ◽  
Voltage Regulator ◽  
Switched Capacitor ◽  
Switched Capacitor Circuits ◽  
Coupled Inductors ◽  
Current Sharing ◽  
Charging Current ◽  
In Series ◽  
Switched Capacitor Converter

<div>This paper presents a 48 V–1 V merged-two-stage hybrid-switched-capacitor converter with a Linear Extendable Group Operated Point-of-Load (LEGO-PoL) architecture for ultra-high-current microprocessors, featuring 3-D stacked packaging and coupled inductors for miniaturized size and vertical power delivery. The architecture is highly modular and scalable. The switched capacitor circuits are connected in series on the input side to split the high input voltage into multiple stacked voltage domains. The multiphase buck circuits are connected in parallel to distribute the high output current into multiple parallel current paths. It leverages the advantages of switched capacitor circuits and multiphase buck circuits to achieve soft charging, current sharing, and voltage balancing. The inductors of the multiphase buck converters are used as current sources to soft-charge and soft-switch the switched-capacitor circuits, and the switched-capacitor circuits are utilized to ensure current sharing among the multiphase buck circuits. A 780 A vertical stacked CPU voltage regulator with a peak efficiency of 91.1% and a full load efficiency of 79.2% at an output voltage of 1 V with liquid cooling is built and tested. This is the first demonstration of a 48 V–1 V CPU voltage regulator to achieve over 1 A/mm2 current density and the first to achieve 1,000 W/in3 power density. It regulates output voltage between 0.8 V and 1.5 V through the entire 780 A current range.</div>

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