Titel Deelnemers
"Controlling a switched reluctance motor with a conventional three phase bridge instead of asymmetric H-bridges" "Haitao Sun, Ali Farzan Moghaddam, Abdalla Hussein Rashad Mohamed, Mohamed Ibrahim, Peter Sergeant, Alex Van den Bossche"
"Theoretical and experimental investigation of switching ripple in the DC-link voltage of single-phase H-bridge PWM inverters" "Amirreza Naderipour, Zulkurnain Abdul-Malek, Mohammad Reza Miveh, Mohammad Jafar Hadidian Moghaddam, Akhtar Kalam, Foad Heidari Gandoman" "Direct current (DC)-link voltage ripple analysis is essential for determining harmonic noise and for DC-link capacitor design and selection in single-phase pulse-width modulation (PWM) inverters. This paper provides an extensive theoretical analysis of DC-link voltage ripple for full-bridge (H-bridge) inverters, with simulation and experimental verifications, considering a DC source impedance (non-ideal DC voltage source). The DC voltage ripple amplitude is theoretically estimated as a function of the output current, both amplitude and phase angle, and the modulation index. It consists of a switching frequency component and a double-fundamental frequency component (i.e., 100 Hz), thereby both components are considered in the analysis. In particular, the peak-to-peak distribution, maximum amplitude, and root mean square (RMS) values of the voltage switching ripple over the fundamental period are obtained. Based on the DC voltage requirements, simple and effective guidelines for designing DC-link capacitors are obtained."
"Simple time domain analysis of a five-level H-bridge Flying Capacitor converter voltage balancing" "Steven Thielemans, Alex Ruderman, Boris Reznikov, Jan Melkebeek" "Flying Capacitor (FC) multilevel Pulse Width Modulated (PWM) converters are an attractive choice due to the natural balancing property of the capacitor voltages. The balancing can be studied in the time domain, which results in easy to interpret expressions regarding parameter influence. Time domain analysis is normally done by time averaging of the system model over a PWM-period. In this paper a new method is presented starting from the U+201Cvoltage unbalanceU+201D excessive energy which has to be dissipated in the converter load by switching harmonics in the load current. This is applied on a five-level H-bridge converter, which has dynamics of a high order and is normally hard to describe in the dime domain. The proposed method results in time domain parameters exactly describing the behaviour and the balancing of the capacitor voltages of the five-level H-bridge converter."
"Battery voltage equalisation using single-phase cascaded H-bridge converters" "Ashkan Pirooz, Yousef Firouz, Maitane Berecibar, Joeri Van Mierlo" "This research demonstrates modular battery storage systems’ voltage balancing using cascaded H-bridge (CHB) converters. The main principle is to maintain AC-side high-quality power absorption or injection, while on the DC-side independent battery units’ voltages get balanced. The CHB converter operates in inversion or rectification modes to discharge the storage system to an AC load/grid, or to charge it from an AC source, respectively. To achieve this goal, several challenges as high-differential mode dv/dtdv/dt, and dealing with semiconductors voltage drop also arise which should get tackled through feasible controller design. Model predictive control (MPC), as a flexible technique capable of multi-parameter controlling, is used to achieve the beforementioned system objectives in a simple, efficient, and scalable manner. The proposed MPC-based algorithm is an AC current controller, which handles DC-side voltage equalisation and introduces adjacent CHB voltage levels to reduce dv/dtdv/dt and performs switches voltage loss modelling all in a single control block. An additional linear controller based on multi-carrier pulse width modulation is also implemented for comparison with the MPC-based design. Experimental prototyping and simulation results validate the feasibility of this approach."
"Highly efficient ultra-compact isolated DC-DC converter with fully integrated active clamping H-bridge and synchronous rectifier" "Jan Doutreloigne" "An isolated forward DC-DC converter with monolithically integrated electronics at both sides of the pulse transformer is presented. It converts a 48V DC input voltage into a 12V DC output voltage at 7A load current with a 90.8% overall power efficiency, employing an 800kHz switching frequency, and it occupies a physical volume of 55mm x 35mm x 10mm only. The primary winding of the planar pulse transformer is driven by a new 4-transistor active clamping H-bridge circuit topology that significantly reduces the voltage requirements for the DMOS power devices, thereby enabling monolithic integration of the primary-side electronics in an 80V 0.35U+F06Dm junction-isolated smart-power IC technology. The switching signal at the secondary winding of the planar pulse transformer is converted into a stable DC output voltage by means of a new synchronous rectifier circuit topology that employs an additional DC-DC buck converter and drastically reduces the dynamic switching losses in the DMOS power devices, thereby boosting the power efficiency and enabling monolithic integration of the secondary-side electronics in an 80V 0.35U+F06Dm junction-isolated smart-power IC technology."
"Monolithic integration of an active clamping H-bridge for isolated forward DC-DC converters" "Jan Doutreloigne, Ann Monté, Benoit Bakeroot, Jindrich Windels" "Conventional active clamping circuits for driving the pulse transformer in isolated forward DC-DC converters put considerable voltage stress on the DMOS power devices at high duty ratio. This is not so much an issue for an implementation based on discrete DMOS components, but monolithic integration becomes nearly impossible. This paper presents a new 4-transistor active clamping H-bridge topology that significantly reduces the voltage requirements and allows integration in a junction-isolated smart-power IC technology."
"An active clamping H-bridge for isolated forward DC-DC converters, integrated in a high-voltage smart-power IC technology" "Jan Doutreloigne, Herbert De Pauw" "Conventional active clamping circuits for driving the pulse transformer in isolated forward DC-DC converters put considerable voltage stress on the DMOS power devices at high duty ratio. This is not so much an issue for an implementation based on discrete DMOS components, but monolithic integration becomes nearly impossible. This paper presents a new 4-transistor active clamping H-bridge topology that significantly reduces the voltage requirements and allows integration in a junction-isolated smart-power IC technology."
"A bachelor-student project: buck-boost operation of an integrated H-bridge for variable-speed energy storage systems using measurement coils in the stator of a DC-machine" "Frederik De Belie, Araz Darba, Jan Melkebeek"
"Five-level H-bridge flying capacitor converter voltage balance dynamics analysis" "Steven Thielemans, Alex Ruderman, Boris Reznikov, Jan Melkebeek"
"Simple time domain analysis of a 4-level H-bridge flying capacitor converter voltage balancing" "Steven Thielemans, Alex Ruderman, Boris Reznikov, Jan Melkebeek"