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.
Integrated-magnetic interleaved-boost converters are under development for high-current, high-power applications ranging from automotive fuel cells to photovoltaics. This paper presents an investigation of the various continuous-current and discontinuous-current modes of operation of the integrated-magnetic interleaved two-phase boost converter. Experimental validation is presented from a low-power...
This paper presents the analysis of the mechanism of failure modes in bi-directional phase-shift full-bridge converters, composed of MOSFET, based on the circuit operation and parameters considering parasitic components of MOSFET. In addition, the relation between circuit operation and parameters are suggested through the experimental comparison. Using the relation, the suitable ranges of parameters...
Multi-port DC/DC converters have been widely employed in stand-alone renewable power systems to provide stable and continuous power to the electrical loads. A full-bridge three-port converter (FB-TPC) interfacing a renewable source, a storage battery, and a load is proposed. The proposed FB-TPC integrates two Buck-boost converters into the primary side of the full-bridge topology, and the magnetizing...
This paper shows an innovative improvement of the constant on time (COT) control of transition mode boost PFC. The proposed control method employs a minimum current comparator to improve the harmonic distortion and power factor of the converter while maintaining the same complexity of the constant on time control. An overview and the enhancements of this method are presented in comparison to the standard...
“Peak Current Mode Control” (CPM) is usually implemented in analogue and brings the advantage of cycle by cycle protection, higher bandwidth rejection of input voltage disturbance or equivalently increases a converter's input impedance. “Average Current Mode Control” (ACM) allows inductor current control to a “true average” and will facilitate an accurate current limit loop or Power Factor Correction...
This paper proposes a new topology for a pulse width modulation (PWM) rectifier which can achieves both sinusoidal input current on the ac side and ripple power decoupling on the DC side without additional switches. The AC inductor of the conventional H-bridge circuit is divided into two parts and only an auxiliary decoupling capacitor is added in the proposed circuit. Control scheme is also proposed...
Single-phase AC/DC or DC/AC systems inherently subject to harmonic disturbance which is caused by the well-known double line frequency ripple power. This issue can be eased through the installation of bulky electrolytic capacitors in the dc-link, but such passive filtering approach may inevitably lead to low power density and limited system lifetime. An alternative approach is to use active power...
This paper presents a guide on characterizing state-of-the-art silicon superjunction (SJ) devices in the 600V range for single phase power factor correction (PFC) applications. The characterization procedure is based on a minimally inductive double pulse tester (DPT) with a very low intrusive current measurement method, which enables reaching the switching speed limits of these devices. Due to the...
This paper presents the evaluation of high-voltage cascode gallium nitride (GaN) high-electron-mobility transistors (HEMT) in different packages. The high-voltage cascode GaN HEMT in traditional package has high turn-on loss in hard-switching turn-on condition, and severe internal parasitic ringing, which could possibly damage the gate of GaN HEMT, in hard-switching turn-off condition, due to package...
This paper presents a review of modulation strategies that can be applied to a novel large power voltage source converter arrangement. This arrangement has been used in a 47 MVAR SSSC demonstrator connected to the 220 kV Spanish transmission network, for power flow control purposes. It employs four standard 3-Level Neutral-Point Clamped (3L-NPC) Power Electronic Building Blocks (PEBB), of well-proven...
A new method to selectively control the amount of dc-link voltage ripple by processing the desired reactive power by a DC/DC converter in an isolated AC/DC or AC/DC/AC system is proposed. The concept can reduce the dc-link capacitors used for balancing the input and output power and thereby limiting the voltage ripple. It allows the use of a smaller dc-link capacitor and hence a longer lifetime and...
A traditional Voltage Source Inverter (VSI) has higher efficiency than a Current Voltage Source (CSI) due to the less conduction power loss. However, the reverse recovery of the free-wheeling diode limits the efficiency improvement for the silicon devices based hard-switching VSI. The traditional quasi-soft-switching inverter can alternate between VSI and CSI by using a proper control scheme and thereby...
In this paper is presented a shunt active power filter with a reduced number of inductors for harmonic and reactive power compensation in three-phase three-wire electrical systems. The proposed configuration is based on two single-phase shunt active power filters connected to a three-phase three-wire grid. The two single-phase cells can be achieved by a three-leg singlephase to single-phase ac-dc-ac...
Intel's® 4th generation Core™ microprocessors are powered by Fully Integrated Voltage Regulators (FIVR). These 140 MHz multi-phase buck regulators are integrated into the 22nm processor die, and feature up to 80 MHz unity gain bandwidth, non-magnetic package trace inductors and on-die MIM capacitors. FIVRs are highly configurable, allowing them to power a wide range of products from 3W fanless tablets...
This paper presents adaptive ripple-based constant on-time control architecture for buck converter ICs with wide duty ratio applications. An internal ramp compensation with emulating inductor current ripple is implemented to solve the ripple oscillation instability issue when using low-ESR output capacitors in buck converters. Therefore, no external compensation is required to simplify the system...
This paper presents the design, prototype development, operation and testing of a 1 kW, 800 V output all-SiC boost DC-DC converter using SiC MOSFET and SiC Shottky diode chips. The switching frequency is raised up to as high as 800 kHz and a 230 °C junction temperature has been reached by switching-loss dominant self-heating. High frequency switching characteristics of the proposed converter are evaluated...
This paper presents the design and optimization of MEMS-microfabricated toroidal inductors targeted for use in integrated power electronics. The process is based on MonteCarlo inductor synthesis, performance evaluation based on analytic inductor models and circuit simulation, and Pareto-optimal filtering. The models and simulation are verified through comparison with magnetic finite element analysis...
This paper introduces a concept of a switching cell that utilizes the reconfiguration of series and parallel connections in DC-DC converters. The switching occurs at high switching frequency and the switches can be integrated to be within the solar panels or in between the solar cells. The concept is generalized and applied to basic boost and buck topologies. Analysis and experiments for the reconfigurable...
A traditional half-bridge three-phase inverter topology can achieve zero voltage switching by implementing BCM operation which requires no additional power devices or magnetic components. In this paper a variable boundary dualmode current modulation method that combines ZVS and ZCS is proposed in order to improve the efficiency of the BCM current controlled micro-inverter. Decreasing output current...
The use of permanent magnets for bias magnetization is a known technique to increase the energy storage capability in DC inductors, resulting in a size reduction or increased current rating. This paper presents a brief introduction on the different permanent magnet inductor's configurations found in scientific literature. A new biasing configuration: The Saturation-Gap, will also be presented, simulated...
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.