The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Fully Integrated Voltage Regulator (FIVR) has been introduced on Intel® Xeon® microprocessors which are switching power converters on die. The FIVR design includes air core inductor structures implemented on the package along with output capacitor, compensators, power transistors and control circuits implemented on-die. FIVR analysis has to comprehend and co-optimize both the package and the die....
The power losses of three-level neutral-point-clamped (NPC) converters and their AC-filters with iron and amorphous core inductors designed for a bipolar low voltage direct current (LVDC) distribution network are evaluated. The main objectives of the LVDC distribution network are improved energy efficiency, power quality and reliability and higher power transmission capacity and integration of ICT...
Bidirectional dc-dc converters are widely used in applications requiring bidirectional power flow. Control of these converters in a more suitable way and modeling and analyzing of them in a simpler method is still a research topic. In this paper different small signal modeling methods for bidirectional dc-dc converters are compared. Mathematical averaged small signal modeling and ac sweep tool on...
The double-line-frequency (2ω) power ripple of single-phase quasi-Z-source (qZS) Photovoltaic (PV) inverter highly affects the whole system's design and performance. In this paper, a comprehensive modeling for single-phase qZS PV inverter is proposed, where the 2ω-ripple models of qZS inverter system served by real PV source are established and discussed on cases of with and without PV terminal capacitor...
This paper proposes a buck type PFC which is based on a new bridgeless inverted buck-boost circuit. The circuit can achieve ZVS for the full range via triangular current mode (TCM) and unlike conventional buck PFC, the circuit can operate for the entire cycle. The bridgeless topology has fewer numbers of components in the conduction path than any other bridgeless boost PFC circuits. The ideal full...
In this paper, we provide the comparison of a feedback compensation control and an explicit model predictive control (MPC), which are the popular control algorithms for the DC-DC converter in industry. We develop a small-signal equivalent circuit model for forward DC-DC converters, with the model a feedback compensation controller is designed. Then based on a discrete-time hybrid model we propose...
Ripple-based controls are popular to achieve a fast dynamic response, but the design of these controls assuring robustness is not easy due to its intrinsic nonlinear nature. These techniques often rely on sensing networks heavily dependent on parasitic elements to estimate the inductor current or the capacitor current. Consequently, a modeling technique that takes into account these sensors and parasitic...
In order to reduce the response time and solve the problem of reactive power overcompensation of the magnetically controlled reactor (MCR), a novel compensation algorithm is proposed in this paper. The algorithm is based on the principles and algorithms of unbalanced load compensation and via modifying the compensation conditions of the Steinmetz principle. The general formula of the compensatory...
This paper presents the analysis of a bidirectional series resonant converter (SRC) for light loads working in a discontinuous mode. By using the discontinuous mode, the converter's efficiency is increased because zero current switching is possible at both the turn-on and turn-off process. However, an anomalous step-up behavior was found when the converter is attached to light loads. A comprehensive...
In this paper we present the design of a wireless power receiver fully integrated. The circuit was constrained to occupy a silicon area of 1.5 mm × 1.5 mm in a 0.18 µm RF-CMOS process. The main target was to optimize the part of the power transfer efficiency concerning only the receiver side. In that way, we optimized the quality factor of the integrated inductor, the impedance matching conditions...
Resonant power converters are widely used in domestic induction heating (IH) cooktops due to their advantages in terms of size, efficiency, and power density. The wide range of different induction loads (with different electrical equivalent) and the wide range of required output powers, lead to the load identification as a mandatory and specially challenging aspect. This identification is needed to...
Simulation of induction evaporator with magnetic field concentrator was done. Distribution of magnetic and thermal fields in it was obtained using numerical methods. IV characteristics and frequency dependence of evaporating surface temperature on evaporator design and modes of electric supply were derived.
As switching power converters are becoming widespread, the power quality of inverters and active rectifiers is becoming increasingly important. Effective dead time is a major cause of harmonics in the output current of voltage sourced PWM converters. The traditional dead-time compensation methods can only handle high current operating conditions well. Several methods capable of accurately compensating...
The development of a large scale high voltage direct current (HVDC) power grid requires a reliable, fast and low-loss circuit breaker. The load commutation switch (LCS) is an essential part of ABB's 1200 MW hybrid HVDC breaker concept which builds up a low-loss conducting path for the load current. The technical requirements for the LCS are expressed in this paper by studying the operation principle...
Utilizing strings of cascaded submodules for multilevel dc/ac conversion has become well known due to the widespread popularity of the modular multilevel converter (MMC). Recently, it has been shown that these submodule strings can be adapted to achieve single-stage dc/dc conversion. Although the modular string configurations for dc/ac versus dc/dc conversion are similar, the underlying power transfer...
The voltage regulation for stand-alone three-phase single-stage boost inverter (SSBI) is presented in this paper. In three-phase SSBI, the voltage regulation is achieved by adjusting the boost ratio. The SSBI has been simulated for a wide range of input dc voltages and load levels. Moreover, the performance a 2kW 208/230V laboratory-scale three phase boost inverter is presented for both linear and...
A new discrete time state feedback controller is presented, which allows high bandwidth voltage control of a buck converter for any load condition whether it operates in discontinuous conduction mode (DCM), continuous conduction mode (CCM) or in the boundary of these regions. This makes the buck converter applicable for a wide range of applications. For the control design process two large signal...
This paper reports on an investigation of power losses of converters and amorphous core AC-filter inductors for a bipolar 750 V low voltage direct current (LVDC) distribution network, using electrical and calorimetric measurements. The LVDC network is a promising solution, which brings new opportunities to electricity distribution development. High power quality, reliability and high cost efficiency...
This paper presents a time-efficient modeling and simulation strategy for aggregated microinverters in large-scale simulations, with a 20-panel system used as an example. As the microinverter configuration emerges to overcome reliability and loss mismatch issues in centralized PV inverters, a model that can be used for rapid prototyping is required. This model is also helpful in predicting behaviors...
The analysis and control of Double-input integrated dc-dc converter is presented in this paper. The integrated converter is essentially a combination of buck and buckboost converters. However, on account of integration only one inductor is sufficient enough for performing the power conversion. In order to have simple control strategy as well as simpler compensator design a single loop control scheme,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.