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This paper proposes a new driving method for a switched reluctance motor (SRM) by using a standard full bridge. The windings in the SRM are connected in series to build a ring structure, where a controllable DC source is inserted. Based on the new structure, the theoretical analysis and calculation are made to determine the control parameters. Besides three-phase SRM, the new idea can also be applied to the SRMs with four and five phases. The new driving method is compared with the conventional method by simulation. The results show that with the new method, the ripple of torque and speed in the SRM reduces. The influence of the proposed method on the power rating and losses is then analyzed. The validation is also made to verify the application of the new method and the difference between the conventional driving method and the proposed method. The measured results match the simulated results well.
Haitao Sun; Ali Farzan Moghaddam; Peter Sergeant; Alex Van Den Bossche. A Novel Driving Method for Switched Reluctance Motor With Standard Full Bridge Inverter. IEEE Transactions on Energy Conversion 2020, 35, 994 -1003.
AMA StyleHaitao Sun, Ali Farzan Moghaddam, Peter Sergeant, Alex Van Den Bossche. A Novel Driving Method for Switched Reluctance Motor With Standard Full Bridge Inverter. IEEE Transactions on Energy Conversion. 2020; 35 (2):994-1003.
Chicago/Turabian StyleHaitao Sun; Ali Farzan Moghaddam; Peter Sergeant; Alex Van Den Bossche. 2020. "A Novel Driving Method for Switched Reluctance Motor With Standard Full Bridge Inverter." IEEE Transactions on Energy Conversion 35, no. 2: 994-1003.
In this paper, a single-phase photovoltaic (PV) inverter fed by a boost converter to supply a freezer motor with variable DC input is investigated. The proposed circuit has two stages. Firstly, the DC output of the PV panel that varies between 150 and 300 V will be applied to the boost converter. The boost converter will boost the input voltage to a fixed 300 V DC. Next, this voltage is supplied to the single-phase full bridge inverter to obtain 230 V AC. In the end, The output of the inverter will feed a freezer motor. The PV panels can be stand-alone or grid-connected. The grid-connected PV is divided into two categories, such as with a transformer and without a transformer, a transformer type has galvanic isolation resulting in increasing the security and also provides no further DC current toward the grid, but it is expensive, heavy and bulky. The transformerless type holds high efficiency and it is cheaper, but it suffers from leakage current between PV and the grid. This paper proposes a stand-alone direct use of PV to supply a freezer; therefore, no grid connection will result in no leakage current between the PV and Grid. The proposed circuit has some features such as no filtering circuit at the output of the inverter, no battery in the system, DC-link instead of AC link that reduces no-loads, having a higher efficiency, and holding enough energy in the DC-link capacitor to get the motor started. The circuit uses no transformers, thus, it is cheaper and has a smaller size. In addition, the system does not require a complex pulse width modulation (PWM) technique, because the motor can operate with a pulsed waveform. The control strategy uses the PWM signal with the desired timing. With this type of square wave, the harmonics (5th and 7th) of the voltage are reduced. The experimental and simulation results are presented to verify the feasibility of the proposed strategy.
Ali Farzan Moghaddam; Alex Van Den Bossche. Direct Usage of Photovoltaic Solar Panels to Supply a Freezer Motor with Variable DC Input Voltage. Electronics 2020, 9, 167 .
AMA StyleAli Farzan Moghaddam, Alex Van Den Bossche. Direct Usage of Photovoltaic Solar Panels to Supply a Freezer Motor with Variable DC Input Voltage. Electronics. 2020; 9 (1):167.
Chicago/Turabian StyleAli Farzan Moghaddam; Alex Van Den Bossche. 2020. "Direct Usage of Photovoltaic Solar Panels to Supply a Freezer Motor with Variable DC Input Voltage." Electronics 9, no. 1: 167.
A battery management system (BMS) plays an important role in electric vehicles (EVs) in order to achieve a reasonable-lasting lifetime. An equalizing method is essential in order to obtain the best performance. A monitoring system is required to check if any cell voltage is high or low. In this paper, an equalizing and monitoring system for an ultra-light electric vehicle is proposed. The monitoring system detects if one cell is fully charged or all cells are fully charged and the equalizing system tops each cell at the desired voltage. To solve this issue, a light-emitting diode (LED) band gap is used as a voltage reference to inform the user if any cell is at its high voltage. A smart monitoring displays on the liquid crystal display (LCD), if one cell is high or all cells are high. This detection also provides a signal to the microcontroller to turn on/off the charger if all cells are high. Also, a Bluetooth module was designed to command the microcontroller the charger to turn on/off via voice/text message by using a smartphone. Additionally, a new smart monitoring system based on the Bluetooth model (HC05) and mobile app has been made in order to monitor individual cell voltage. A major feature of the system is to draw a very-low current, so that the system does not contribute significantly to the self-discharge of the battery and the circuit does not need sophisticated control. Manufacturers of large electric vehicles may have more intelligent systems that may require a permanent connection to the grid and allow high standby losses, where more state of charge (SOC) may be lost per day. The paper is rather focused on reducing the standby losses, and to activate the equalizer only when charging and/or driving. The experimental results are performed in order to verify the feasibility of the proposed circuit.
Ali Farzan Moghaddam; Alex Van Den Bossche. A Smart High-Voltage Cell Detecting and Equalizing Circuit for LiFePO4 Batteries in Electric Vehicles. Applied Sciences 2019, 9, 5391 .
AMA StyleAli Farzan Moghaddam, Alex Van Den Bossche. A Smart High-Voltage Cell Detecting and Equalizing Circuit for LiFePO4 Batteries in Electric Vehicles. Applied Sciences. 2019; 9 (24):5391.
Chicago/Turabian StyleAli Farzan Moghaddam; Alex Van Den Bossche. 2019. "A Smart High-Voltage Cell Detecting and Equalizing Circuit for LiFePO4 Batteries in Electric Vehicles." Applied Sciences 9, no. 24: 5391.
In this paper, the concept of active cell-balancing technique, by using a multiple-outputs double-forward converter for lithium-ion (Li-ion) batteries, is investigated. It controls two times more cells than secondaries, and it equalizes eight cells in a series. In this method, four secondaries can reasonably be wound with the same back electromotive force (EMF). This means a low pin count on the transformer and a low bill of materials (BOM). The bridge uses four N-channel MOSFETs as switches, which means two times fewer transistors than cells, resulting in fewer switching losses. This scheme is applied for controlling the minimum voltage among the cells of the lithium-ion battery. It uses a multi-winding transformer based on a forward double converter structure. Conventional schemes using a multi-winding transformer for electric vehicles (EVs) require an equal number of secondaries per cell. This scheme requires one secondary for two adjacent cells, thus the number of secondaries is reduced by a factor of two. Also, the redistribution of charge from a high cell to a low cell does not require many switching components and little intelligence to determine low cell voltage detection. The basic principle of this method is to use the overall battery pack voltage as a reference to supply individual cells, using a forward converter containing a transformer with a well-chosen winding ratio. The experimental and simulation results are performed to verify the feasibility of the proposed system.
Ali Farzan Moghaddam; Alex Van Den Bossche. A Single Transformer for Active Cell Equalization Method of Lithium-Ion Batteries with Two Times Fewer Secondaries than Cells. Electronics 2019, 8, 951 .
AMA StyleAli Farzan Moghaddam, Alex Van Den Bossche. A Single Transformer for Active Cell Equalization Method of Lithium-Ion Batteries with Two Times Fewer Secondaries than Cells. Electronics. 2019; 8 (9):951.
Chicago/Turabian StyleAli Farzan Moghaddam; Alex Van Den Bossche. 2019. "A Single Transformer for Active Cell Equalization Method of Lithium-Ion Batteries with Two Times Fewer Secondaries than Cells." Electronics 8, no. 9: 951.
In this paper, a c´uk converter balancing method by using a coupled inductor for lithium based batteries is investigated. The proposed circuit is an active balancing circuit that will equalize eight battery cells in a series. In electrical vehicles (EV), a battery management system (BMS) is a vital task to achieve the best performance of the batteries and longer lifetime. The problem of voltage difference in a battery pack is an important issue to be improved. To overcome the voltage differences in battery string, an equalizing method is mandatory. The conventional c´uk converter requires 2(n − 1) switches to balance n cells, while the proposed circuit requires only n switches for n cells in series. In addition, the proposed developed topology uses coupled inductors instead of un-coupled inductors, unlike the traditional c´uk converter balancing method. Since the c´uk balancing transfers the energy among two adjacent cells, it requires a proportionately long equalization time particularly for long string battery packs, but the coupled inductor c´uk converter type overcomes this problem. The switches are N-channel metal-oxide field-effect transistor (MOSFET) to achieve lower drain-source on-resistance, RDS(on), and less voltage drop as compared to the P-channels. The switches are triggered by complementary signals. The coupled inductor is made in such a way to hold the same magnetizing inductance. It can be done by using five wires in one hand. The circuit contains five inductors, one magnetic core, with five winding for eight cells, and one capacitor for two cells. Therefore, the overall circuitry and complexity of the circuit are reduced, resulting in a more cost-effective and easy to implement circuit. The system also does not demand complicated control for battery equalizing. The experimental circuit was implemented and simulation results were obtained to confirm the validity of the proposed system.
Ali Farzan Moghaddam; Alex Van Den Bossche. A Ćuk Converter Cell Balancing Technique by Using Coupled Inductors for Lithium-Based Batteries. Energies 2019, 12, 2881 .
AMA StyleAli Farzan Moghaddam, Alex Van Den Bossche. A Ćuk Converter Cell Balancing Technique by Using Coupled Inductors for Lithium-Based Batteries. Energies. 2019; 12 (15):2881.
Chicago/Turabian StyleAli Farzan Moghaddam; Alex Van Den Bossche. 2019. "A Ćuk Converter Cell Balancing Technique by Using Coupled Inductors for Lithium-Based Batteries." Energies 12, no. 15: 2881.
A new structure of a linear switched reluctance motor is proposed in this paper. With the permanent magnet inserted in the movers, the performance of the original motor is improved. An electromagnetic analysis is done by using the finite element analysis. The influence of the permanent magnets in different positions of the movers on the electromagnetic force is investigated. Furthermore, a theoretical analysis is made, based on the Schwarz–Christoffel transformation and the Maxwell stress tensor method. The mathematic model is also made with the consideration of the end effect and the cogging effect. The theoretical result of the electromagnetic force is compared with the simulation result. The comparison shows that the error is limited. The analysis of the flux, the magnetic field, and the inductance is then made. The results confirm that the new structure makes the motor more linearized. The new structure of linear switched reluctance motor can contribute to reducing the ripple in the electromagnetic force.
Haitao Sun; Yan Chen; Chunyan Ma; Ali Farzan Moghaddam; Peter Sergeant; Alex Van Den Bossche. A novel design and electromagnetic analysis for a linear switched reluctance motor. Electrical Engineering 2019, 101, 609 -618.
AMA StyleHaitao Sun, Yan Chen, Chunyan Ma, Ali Farzan Moghaddam, Peter Sergeant, Alex Van Den Bossche. A novel design and electromagnetic analysis for a linear switched reluctance motor. Electrical Engineering. 2019; 101 (2):609-618.
Chicago/Turabian StyleHaitao Sun; Yan Chen; Chunyan Ma; Ali Farzan Moghaddam; Peter Sergeant; Alex Van Den Bossche. 2019. "A novel design and electromagnetic analysis for a linear switched reluctance motor." Electrical Engineering 101, no. 2: 609-618.
In this paper, the concept of a forward balancing technique fed by a buck converter for lithium-based batteries in Electrical Vehicle (EV) applications is investigated. The proposed active topology equalizes eight cells in a series in a battery pack, by using a forward converter for each battery pack and the whole battery packs, using a buck converter. The battery bank consists of four battery packs, which are in series. Therefore, the proposed system will equalize 32 cells in series. In this paper, the proposed circuit employs a single transistor used in a Zero Voltage Switch (ZVS) for the forward converter. In practice, this means a capacitor in parallel with the switch at the same time a demagnetizing of the transformer is obtained. The circuit realizes a low Electromagnetic Interference (EMI) and reduces ringing. To overcome the problem of many pins on a coil former, the transformer secondary windings are made by using hairpin winding, on a ring core. It permits, e.g., having eight secondaries and uniform output voltages. Each secondary winding is made by two hairpin turns using two zero-Ohm resistors in series. The proposed topology has less components and circuitry, and it can equalize multiple battery packs by using a single buck converter and several forward converters for each battery pack. Experimental and simulation results are performed to verify the viability of the proposed topology.
Ali Farzan Moghaddam; Alex Van Den Bossche. Forward Converter Current Fed Equalizer for Lithium Based Batteries in Ultralight Electrical Vehicles. Electronics 2019, 8, 408 .
AMA StyleAli Farzan Moghaddam, Alex Van Den Bossche. Forward Converter Current Fed Equalizer for Lithium Based Batteries in Ultralight Electrical Vehicles. Electronics. 2019; 8 (4):408.
Chicago/Turabian StyleAli Farzan Moghaddam; Alex Van Den Bossche. 2019. "Forward Converter Current Fed Equalizer for Lithium Based Batteries in Ultralight Electrical Vehicles." Electronics 8, no. 4: 408.
: Modular multilevel converters (MMCs) are quickly emerging as a suitable technology for a voltage-source converter-based high-voltage direct-current (VSC-HVDC) transmission systems due to its numerous advantages as reported in literature. However, for a large DC-network, MMCs require large numbers of sub-modules (SMs) and switches, which makes its modeling very challenging and computationally complex using electromagnetic transient (EMT) programs. Average Value Model (AVM) provides a relatively better solution to model MMCs by combining cells as an arm equivalent circuit. Circulating current is an important issue related to the performance and stability of MMCs. Due to circulating currents, power loss in a converter increases as root mean square (RMS) values of the arm current increases. The traditional method for inserting SMs in each arm is based on direct modulation, which does not compensate for the arm voltage oscillations, and generates circulating current in each leg of a three-phase MMC. This paper presents a new method for reducing the circulating current by adding 2nd and 4thharmonics in the upper and lower arm currents of an MMC. Less capacitor energy variations reobtained by the proposed method compared to traditional direct modulation methods. The proposed method is tested on a common symmetrical monopole (point-to-point) MMC-HVDC system using vector current control strategy in PSCAD/EMTDC software. Analytical and simulation results show the effectiveness of the new method in minimizing the circulating current and arm voltage oscillation reductions as compared to the direct modulation approach.
Kamran Hafeez; Shahid A. Khan; Alex Van Den Bossche; Qadeer Ul Hasan. Circulating Current Reduction in MMC-HVDC System Using Average Model. Applied Sciences 2019, 9, 1383 .
AMA StyleKamran Hafeez, Shahid A. Khan, Alex Van Den Bossche, Qadeer Ul Hasan. Circulating Current Reduction in MMC-HVDC System Using Average Model. Applied Sciences. 2019; 9 (7):1383.
Chicago/Turabian StyleKamran Hafeez; Shahid A. Khan; Alex Van Den Bossche; Qadeer Ul Hasan. 2019. "Circulating Current Reduction in MMC-HVDC System Using Average Model." Applied Sciences 9, no. 7: 1383.
This article developed a coupled inductor balancing method to overcome cell voltage variation among cells in series, for Lithium Ion (Li-ion) batteries in Electrical Vehicles (EV). For an "eight cells in series" example, the developed balance circuit has four inductors, one magnetic circuit with one winding per two cells, and one control switch per cell, as compared to the traditional inductor-based equalizer that needs N-1 inductors and magnetic circuits for N number of cells and more switches. Therefore, ultimately, a more efficient, cost-effective circuit and low bill of materials (BOM) will be built up. All switches are logic-level N-Channel metal-oxide-semiconductor field-effect transistors (MOSFETs) and they are controlled by a pair of complementary signals in a synchronous trigger pattern. In the proposed topology, less components and fast equalization are achieved compared to the conventional battery management system (BMS) technique for electrical vehicles based on the inductor balancing method. This scheme is suitable for fast equalization due to the inductor-based balancing method. The inductors are made with a well-chosen winding ratio and all are coupled with one magnetic core with an air gap. Theoretical derivation of the proposed circuit was well-presented, and numerical simulation relevant to the electrochemical storage devices was conducted to show the validity of the proposed balance circuit. A complete balance circuit was built to verify that the proposed circuit could resolve imbalance problems which existed inside battery modules.
Ali Farzan Moghaddam; Alex Van Den Bossche. An Efficient Equalizing Method for Lithium-Ion Batteries Based on Coupled Inductor Balancing. Electronics 2019, 8, 136 .
AMA StyleAli Farzan Moghaddam, Alex Van Den Bossche. An Efficient Equalizing Method for Lithium-Ion Batteries Based on Coupled Inductor Balancing. Electronics. 2019; 8 (2):136.
Chicago/Turabian StyleAli Farzan Moghaddam; Alex Van Den Bossche. 2019. "An Efficient Equalizing Method for Lithium-Ion Batteries Based on Coupled Inductor Balancing." Electronics 8, no. 2: 136.
A proportional integral derivative (PID) controller is the most commonly used in integrating process, where the time delay is inevitable. In order to tune a PID controller, several factors should be taken into account such as time delay, mathematic model and the feedback signals. Some existed tuning methods failed to obtain the correct parameters with all the factors. The proposed tuning method presents some formulas, which considers all the factors. The proposed tuning method is also tested by practical circuit, which proved that the method can be applied for several cases, especially for the inductor current control.
Haitao Sun; Mohannad Jabbar Mnati; Mohamed N. Ibrahim; Alex Van Den Bossche. A Tuning Method for PID Controller for an Integrating System with Time Delay. MATEC Web of Conferences 2018, 249, 03007 .
AMA StyleHaitao Sun, Mohannad Jabbar Mnati, Mohamed N. Ibrahim, Alex Van Den Bossche. A Tuning Method for PID Controller for an Integrating System with Time Delay. MATEC Web of Conferences. 2018; 249 ():03007.
Chicago/Turabian StyleHaitao Sun; Mohannad Jabbar Mnati; Mohamed N. Ibrahim; Alex Van Den Bossche. 2018. "A Tuning Method for PID Controller for an Integrating System with Time Delay." MATEC Web of Conferences 249, no. : 03007.
Sophisticated techniques are required for getting accuracy in high frequency power losses of magnetic. This paper presents a high frequency power loss measurement platform (full bridge) that provides accurate assessing of losses in magnetic components. This is obtained by a construction of a thermal shunt with radiator to measure the losses of the bridge. An aluminum strip is used as a “thermal resistor”. Two NTC resistors measure the temperature drop across the aluminum strip. The magnetic device loss equals the DC input power of the platform minus the bridge loss. The copper loss can be estimated while using litz wire. Using litz wire windings with sufficiently low diameter of the strands allows neglecting eddy current losses, thus measuring only DC resistance is enough for calculating of copper losses. It can be checked by an RLC meter if the assumption is reasonable. The proposed approach and platform are verified by realization and experiments with a full bridge converter based on SiC switches and operating in frequency range of 50 kHz to 1 MHz. The proposed platform can be used for obtaining the frequency dependence of core losses of magnetic materials, as well as the dependence on duty ratio of the power converter.
Vencislav Cekov Valchev; Alex Van Den Bossche; Plamen Valentinov Yankov. High frequency power loss measurement platform. International Journal of Electronics Letters 2018, 8, 28 -37.
AMA StyleVencislav Cekov Valchev, Alex Van Den Bossche, Plamen Valentinov Yankov. High frequency power loss measurement platform. International Journal of Electronics Letters. 2018; 8 (1):28-37.
Chicago/Turabian StyleVencislav Cekov Valchev; Alex Van Den Bossche; Plamen Valentinov Yankov. 2018. "High frequency power loss measurement platform." International Journal of Electronics Letters 8, no. 1: 28-37.
This paper proposes a new driving method for switched reluctance motors (SRMs) using the standard full-bridge inverter. In spite of changing the internal structure of an SRM, the proposed method uses an extra ring structure circuit to make it possible for the inverter to drive the SRM. Next to the standard converter, a controllable DC source is needed. With theoretical analysis and calculation, the reference value of the circulating current in the ring structure was determined and the new method was proven via simulation. A comparison was made with the conventional method for driving an SRM: the asymmetric H-bridges. Also, the current studies were then made to confirm that the SRM could be controlled without lowering the performance of the machine. Experimental verification was also made under different conditions, as well as comparison with the simulation results.
Haitao Sun; Ali Farzan Moghaddam; Abdalla Hussein Mohamed; Mohamed Nabil Ibrahim; Peter Sergeant; Alex Van Den Bossche. Controlling a Switched Reluctance Motor with a Conventional Three-Phase Bridge Instead of Asymmetric H-Bridges. Energies 2018, 11, 3242 .
AMA StyleHaitao Sun, Ali Farzan Moghaddam, Abdalla Hussein Mohamed, Mohamed Nabil Ibrahim, Peter Sergeant, Alex Van Den Bossche. Controlling a Switched Reluctance Motor with a Conventional Three-Phase Bridge Instead of Asymmetric H-Bridges. Energies. 2018; 11 (12):3242.
Chicago/Turabian StyleHaitao Sun; Ali Farzan Moghaddam; Abdalla Hussein Mohamed; Mohamed Nabil Ibrahim; Peter Sergeant; Alex Van Den Bossche. 2018. "Controlling a Switched Reluctance Motor with a Conventional Three-Phase Bridge Instead of Asymmetric H-Bridges." Energies 11, no. 12: 3242.
The use of renewable energy such as wind power is one of the most affordable solutions to meet the basic demand for electricity because it is the cleanest and most efficient resource. In Algeria, the highland region has considerable wind potential. However, the electrical power system located is this region is generally not powerful enough to solve the problems of voltage instability during grid fault conditions. These problems can make the connection with the eventual installation of a wind farm very difficult and inefficient. Therefore, a wind farm project in this region may require dynamic compensation devices, such as a distributed-flexible AC transmission system (D-FACTS) to improve its fault ride through (FRT) capability. This paper investigates the implementation of shunt D-FACTS, under grid fault conditions, considering the grid requirements over FRT performance and the voltage stability issue for a wind farm connected to the distribution network in the Algerian highland region. Two types of D-FACTSs considered in this paper are the distribution static VAr compensator (D-SVC) and the distribution static synchronous compensator (D-STATCOM). Some simulation results show a comparative study between the D-SVC and D-STATCOM devices connected at the point of common coupling (PCC) to support a wind farm based on a doubly fed induction generator (DFIG) under grid fault conditions. Finally, an appropriate solution to this problem is presented by sizing and giving the suitable choice of D-FACTS, while offering a feasibility study of this wind farm project by economic analysis.
Lina Wang; Kamel Djamel Eddine Kerrouche; Abdelkader Mezouar; Alex Van Den Bossche; Azzedine Draou; Larbi Boumediene. Feasibility Study of Wind Farm Grid-Connected Project in Algeria under Grid Fault Conditions Using D-Facts Devices. Applied Sciences 2018, 8, 2250 .
AMA StyleLina Wang, Kamel Djamel Eddine Kerrouche, Abdelkader Mezouar, Alex Van Den Bossche, Azzedine Draou, Larbi Boumediene. Feasibility Study of Wind Farm Grid-Connected Project in Algeria under Grid Fault Conditions Using D-Facts Devices. Applied Sciences. 2018; 8 (11):2250.
Chicago/Turabian StyleLina Wang; Kamel Djamel Eddine Kerrouche; Abdelkader Mezouar; Alex Van Den Bossche; Azzedine Draou; Larbi Boumediene. 2018. "Feasibility Study of Wind Farm Grid-Connected Project in Algeria under Grid Fault Conditions Using D-Facts Devices." Applied Sciences 8, no. 11: 2250.
It is known that in order to drive a switched reluctance motor (SRM), the power converter is required, which makes it different from other common type of motors such as brushless direct current motor (BLDC). As a result, the cost of the control system for SRM is higher than the conventional inverter structure of control system for BLDC. A new control strategy for SRM is proposed in this paper, with an extra DC power supply, SRM can be driven by a general inverter without changing the structure of the motor itself, the cost for driving SRM can be reduced drastically. The new control method is also tested with simulation and validation, which prove that the new method can work in the practical application.
Haitao Sun; Ali Farzan Moghaddam; Mohannad Mnati; Abdalla Hussein Mohamed; Mohamed Nabil Ibrahim; Peter Sergeant; Alex Van Den Bossche. A Control Method with Ring Structure for Switched Reluctance Motor. 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC) 2018, 1 -5.
AMA StyleHaitao Sun, Ali Farzan Moghaddam, Mohannad Mnati, Abdalla Hussein Mohamed, Mohamed Nabil Ibrahim, Peter Sergeant, Alex Van Den Bossche. A Control Method with Ring Structure for Switched Reluctance Motor. 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC). 2018; ():1-5.
Chicago/Turabian StyleHaitao Sun; Ali Farzan Moghaddam; Mohannad Mnati; Abdalla Hussein Mohamed; Mohamed Nabil Ibrahim; Peter Sergeant; Alex Van Den Bossche. 2018. "A Control Method with Ring Structure for Switched Reluctance Motor." 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC) , no. : 1-5.
Kamel Djamel Eddine Kerrouche; Lina Wang; Alex Van Den Bossche; Azzedine Draou; Abdelkader Mezouar; Larbi Boumediene. Dual Robust Control of Grid-Connected DFIGs-Based Wind- Turbine-Systems under Unbalanced Grid Voltage Conditions. Stability Control and Reliable Performance of Wind Turbines 2018, 1 .
AMA StyleKamel Djamel Eddine Kerrouche, Lina Wang, Alex Van Den Bossche, Azzedine Draou, Abdelkader Mezouar, Larbi Boumediene. Dual Robust Control of Grid-Connected DFIGs-Based Wind- Turbine-Systems under Unbalanced Grid Voltage Conditions. Stability Control and Reliable Performance of Wind Turbines. 2018; ():1.
Chicago/Turabian StyleKamel Djamel Eddine Kerrouche; Lina Wang; Alex Van Den Bossche; Azzedine Draou; Abdelkader Mezouar; Larbi Boumediene. 2018. "Dual Robust Control of Grid-Connected DFIGs-Based Wind- Turbine-Systems under Unbalanced Grid Voltage Conditions." Stability Control and Reliable Performance of Wind Turbines , no. : 1.
Vencislav Cekov Valchev; Alex Van Den Bossche. Inductors and Transformers for Power Electronics. Inductors and Transformers for Power Electronics 2018, 1 .
AMA StyleVencislav Cekov Valchev, Alex Van Den Bossche. Inductors and Transformers for Power Electronics. Inductors and Transformers for Power Electronics. 2018; ():1.
Chicago/Turabian StyleVencislav Cekov Valchev; Alex Van Den Bossche. 2018. "Inductors and Transformers for Power Electronics." Inductors and Transformers for Power Electronics , no. : 1.
The concept of active cell equalizing method based on multi-winding transformer balancing for Lithium Ion (Li-ion) batteries is presented in this paper. In a battery pack, voltage differences exist between cells due to charging and discharging process thus, a battery management system (BMS) is required to ensure that all battery cells are equally charged or discharged. An equalizing method is essential to achieve the best performance. A number of cell balancing method have been presented. Among them multi-winding transformer balancing method has fast equalization time, and is easy to control. As compared to the conventional multi-winding transformer (Fly back structure) that uses diodes and requires air gap, this method (Forward) uses MOSFETs as a switch in the output and uses single phase inverter in the input. Fast equalization, easy to control, high efficiency and easy isolation are some of its features. The simulation results are accomplished to demonstrate the viability of the system.
Ali Farzan Moghaddam; Alex Van Den Bossche. Multi-Winding Equalization Technique for Lithium Ion Batteries for Electrical Vehicles. 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA) 2018, 139 -143.
AMA StyleAli Farzan Moghaddam, Alex Van Den Bossche. Multi-Winding Equalization Technique for Lithium Ion Batteries for Electrical Vehicles. 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA). 2018; ():139-143.
Chicago/Turabian StyleAli Farzan Moghaddam; Alex Van Den Bossche. 2018. "Multi-Winding Equalization Technique for Lithium Ion Batteries for Electrical Vehicles." 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA) , no. : 139-143.
The constantly decreasing prices of the battery storage systems make them a very attractive solution for mitigating over voltages and voltage unbalance in low voltage grids with high penetration of renewable energy resources. A centralised storage device, connected at the end of the feeder can be a very effective solution for dealing with over voltages. The classical positive-sequence control strategy is usually employed in these devices to ensure a power exchange between the grid and the battery and vice versa. Nevertheless, the voltage unbalance cannot be mitigated by the classical control strategies. In this article, a modified three-phase damping control strategy is used to discharge and charge the battery storage system. This control strategy has an improved resistive behavior towards the zero- and negative-sequence components which mitigates the voltage unbalance by injecting or drawing asymmetrical phase currents. Thus both power quality problems are mitigated.
Dimitar V. Bozalakov; Mohannad Jabbar Mnati; Joannes Laveyne; Alex Van Den Bossche; Lieven Vandevelde. Voltage Unbalance and Overvoltage Mitigation by Using the Three-phase Damping Control Strategy in Battery Storage Applications. 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA) 2018, 753 -759.
AMA StyleDimitar V. Bozalakov, Mohannad Jabbar Mnati, Joannes Laveyne, Alex Van Den Bossche, Lieven Vandevelde. Voltage Unbalance and Overvoltage Mitigation by Using the Three-phase Damping Control Strategy in Battery Storage Applications. 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA). 2018; ():753-759.
Chicago/Turabian StyleDimitar V. Bozalakov; Mohannad Jabbar Mnati; Joannes Laveyne; Alex Van Den Bossche; Lieven Vandevelde. 2018. "Voltage Unbalance and Overvoltage Mitigation by Using the Three-phase Damping Control Strategy in Battery Storage Applications." 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA) , no. : 753-759.
This paper presents the concept of charging of Lithium Iron Phosphate (LFP) battery cells in an Electric vehicle (EV). Charger topologies play an important role in EVs to increase the performance of the batteries. The batteries should be charged and discharged to achieve the best performance and long lifetime. In this paper, the design of a charger with four battery packs, that consist of eight cells in a series is investigated. Two battery chargers are performed in order to feed the whole battery packs. A current driver is proposed to limit the current from the charger and the operational principle is based on a MOSFET constant current driver. The battery should only be connected when the car needs to drive in order to avoid unnecessary losses. Also a resistor is needed to avoid high starting currents, thus the startup system is required and designed to overcome this problem. The operational principle of the proposed circuit is explained in details and the experimental result are performed to verify the feasibility of the proposed system.
Ali Farzan Moghaddam; Mohannad Jabbar Mnati; Haitao Sun; Alex Van Den Bossche. Electric Vehicles Charging Concepts for Lithium Based Batteries. 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA) 2018, 397 -401.
AMA StyleAli Farzan Moghaddam, Mohannad Jabbar Mnati, Haitao Sun, Alex Van Den Bossche. Electric Vehicles Charging Concepts for Lithium Based Batteries. 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA). 2018; ():397-401.
Chicago/Turabian StyleAli Farzan Moghaddam; Mohannad Jabbar Mnati; Haitao Sun; Alex Van Den Bossche. 2018. "Electric Vehicles Charging Concepts for Lithium Based Batteries." 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA) , no. : 397-401.
Nowadays, most three-phase, “off the shelf” inverters use electrolytic capacitors at the DC bus to provide short term energy storage. However, this has a direct impact on inverter lifetime and the total cost of the photovoltaic system. This article proposes a novel control strategy called a 120° bus clamped PWM (120BCM). The 120BCM modulates the DC bus and uses a smaller DC bus capacitor value, which is typical for film capacitors. Hence, the inverter lifetime can be increased up to the operational lifetime of the photovoltaic panels. Thus, the total cost of ownership of the PV system will decrease significantly. Furthermore, the proposed 120BCM control strategy modulates only one phase current at a time by using only one leg to perform the modulation. As a result, switching losses are significantly reduced. The full system setup is designed and presented in this paper with some practical results.
Mohannad Jabbar Mnati; Dimitar V. Bozalakov; Alex Van Den Bossche. New Pulse Width Modulation Technique to Reduce Losses for Three-Phase Photovoltaic Inverters. Active and Passive Electronic Components 2018, 2018, 1 -10.
AMA StyleMohannad Jabbar Mnati, Dimitar V. Bozalakov, Alex Van Den Bossche. New Pulse Width Modulation Technique to Reduce Losses for Three-Phase Photovoltaic Inverters. Active and Passive Electronic Components. 2018; 2018 ():1-10.
Chicago/Turabian StyleMohannad Jabbar Mnati; Dimitar V. Bozalakov; Alex Van Den Bossche. 2018. "New Pulse Width Modulation Technique to Reduce Losses for Three-Phase Photovoltaic Inverters." Active and Passive Electronic Components 2018, no. : 1-10.