Kristof Engelen's research while affiliated with KU Leuven and other places
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Publications (14)
The aim of this paper is to investigate the impact of the current ripple, originating from the dc-dc converter of e.g. a PHEV powertrain, on the ageing of Li-ion batteries. Most research concerning batteries focuses on very low (fxHz) to low (Hz) frequencies and low current ripples to create very accurate battery models which can determine e.g. the...
This study investigates the impact of the dead-time of the semiconductor switches on the operation of a dc-dc converter used in a bidirectional storage system for a hybrid electric vehicle. The dead-time of the switches of the dc-dc converter under investigation is exaggerated to clearly illustrate the effects of the non-linear dependency of the cu...
This paper calculates the electric and magnetic fields and the Poynting
vector around two infinitely long parallel cylindrical conductors,
carrying a DC current. Also the charges on the surface of the wire are
calculated, and their distribution is visualized. The wire is assumed to
be perfectly electrically conducting. Furthermore, the Hall effect...
To adjust the light spectrum of a flash lamp, the current flowing through the flash lamp has to be controlled. An optimal design of a switched resistor bank circuit following a predefined current profile is presented. The optimal values of the switched resistors are calculated using multi-objective optimization with genetic algorithms.
This paper presents a laboratory platform used in a problem solving and design course for first year engineering master students at the KU Leuven. The platform implements three power electronic systems that are found in electric vehicles: a field oriented controlled motor drive capable of regenerative braking, a bidirectional DC-DC converter and a...
![Fig. 1: Public transport map for the Avenue de l'Opéra [13].](profile/Sven-De-Breucker/publication/254026780/figure/fig1/AS:668967182012418@1536505613438/Public-transport-map-for-the-Avenue-de-lOpera-13_Q320.jpg)
![Fig. 2: Time-based percentage of truck traffic for a 24-hour period [14].](profile/Sven-De-Breucker/publication/254026780/figure/fig3/AS:668967182032901@1536505613519/Time-based-percentage-of-truck-traffic-for-a-24-hour-period-14_Q320.jpg)
![Fig. 3: New York City Cycle Driving Cycle [17].](profile/Sven-De-Breucker/publication/254026780/figure/fig2/AS:668967182008329@1536505613497/New-York-City-Cycle-Driving-Cycle-17_Q320.jpg)
This paper investigates the impact of electrification of trucks and buses in an urban environment. The vehicles are charged while driving on electrified roads (continuous charging), and battery powered on the non-electrified roads. A power management algorithm is proposed for driving on the electrified roads. Simulations covering a 24-hour time fra...
This paper discusses an adaptive control scheme for a bidirectional boost converter used in a hybrid gasoline-electric vehicle. The converter transforms the voltage of the low-voltage battery, approximately 96 V, to 400 V on the DC-link of the motor inverter. The switching frequency of the inverter is 80 kHz, which enables the usage of rather compa...
The students enrolled in the Energy Master's program at the K.U.Leuven are expected to study and develop a series hybrid electric go-kart during their first Master year. Their main goal is to develop control algorithms in Matlab/Simulink for the different power electronic modules present on the kart. This allows students to work in small sub-groups...
A hybrid electric Kart is built as a didactical project for the students of the Master of Engineering: Energy of the K.U.Leuven. In order to cope with the growing number of students, a modular hybrid electric kart is conceived. The hybrid configuration allows to diversify between several tasks that have to be addressed by the students. The tasks in...
This paper describes the design procedure of a phase-locked loop (PLL) preceded by a Kalman estimator-based filter. It provides a highly accurate and fast estimate of the grid frequency and phase angle in grid-connected power electronic applications. Moreover, it enables the transformation to the rotational dq frame for various control purposes. Cl...
The application of DC distribution of electrical power has been suggested as an efficient method of power delivery. This concept is inspired by the absence of reactive power, the possibility of efficient integration of small distributed generation units and the fact that, internally, many appliances operate using a DC voltage. A suitable choice of...
Citations
... The standard driving cycle represents the dependence of the vehicle speed on time V(t) and includes all modes (acceleration, movement at a constant speed, braking, stopping) selected for the most complete driving characteristics in the conditions of normal traffic flow of a large city. Consider four common motion cycles [30]. ...
... Aside from that, the average values are all within the specifications. The influences of current ripples to a cell were investigated in [22][23][24][25]. All of them doubt that current ripples influence cell aging, as long as they stay within the cell specifications. ...
... In [9], the performance of a low voltage direct current (LVDC) and 230V AC systems has been analyzed by considering line losses, devices internal losses, new wire cost and energy consumption cost. In [10], three 20V, 230V and 325V DC voltage level has been analyzed for residential buildings by considering the public utility as a main power source. Additional benefits of DC microgrids are that they produce less heat inside the building envelope so theses are more efficient. ...
... In the former group are references [8] and [9], where hardware platforms are presented which allow for the study of many topologies of two-level power converters. In [10] a test bench oriented to the implementation of domestic induction heating applications is proposed, while in [11] the authors present a hardware platform for electric vehicle applications including motor drive, DC-DC converter and battery charger. In most cases the hardware platforms are controlled by digital signal processors (DSP) in addition of field programmable gate arrays (FPGA). ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/278750546677769-1443470717411_Q64/Niels-Leemput-2.jpg)
... When charging the battery, this converter working as a buck converter, it operates in voltage step-down mode during the battery discharging its working as a boost converter; it operates in voltage step-up mode. The bidirectional dc-dc converter is placed in between high-voltage and low-voltage sources to allow energy transfer [5]. This kind of power converters use in many applications like in hybrid vehicles, in aerospace etc. ...
... mm, much smaller compared to the cylinder diameter of 9.6 mm), this effect on the field on the axis of symmetry is small. This has been verified by comparing the electric field halfway between two metal cylinders (without dielectrics) calculated for the same cylinders diameter and effective gap, (a) from the superposition principle and (b) from exact solution of the Laplace equation [23]. The difference between the two results is approximately 2%. ...
... The history of Electric Vehicle (EV) can be dated back to as early as the beginning of 20th Century [50], and it start to attract substantial public attentions recently due to the urgent call of the transition of energy structure from the high-pollution, non-renewable fossil fuels to the environmental-friendly, renewable energies such as electricity. Some of the most prevailing EV-related technologies being studied, tested, and implemented include battery optimizations [51,52], power management [53][54][55], charging technologies [56,57], charging strategies [58,59], and charging infrastructure deployment [60][61][62]. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/278729298333709-1443465651649_Q64/Juan-Van-Roy.jpg)
... In addition, methods such as Discrete Fourier Transform (DFT) [21] , Hilbert Transform [22] , Kalman Filtering [23] , and Double Complex Coefficient Filtering [24] have also been used for voltage signal orthogonal component construction. However, these methods have various issues, such as requiring a large amount of controller memory or experiencing significant phase locking errors and low-frequency oscillations in complex power grid environments. ...
... DC distribution technologies and standards continue to increase power limits and support more types of building systems (e.g., LED lighting). Traditional AC distribution requires AC/DC converters for building equipment and MELs (e.g., phone chargers, laptop chargers, LED drivers), often leading to power losses [10,[13][14][15]. A single AC to DC conversion stage can exhibit losses ranging from 4% to 15% of the input power [3]. ...
... The following paragraphs discuss the specific tasks and teaching methods associated with each component. More technical details about these power electronic modules can be found in [5]. ...
