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Integrated switched reluctance motor drive as an electric vehicle battery charger is presented in this paper. The SRM, which is used as the traction power in the driving mode, is used in the charge circuit to improve the power factor of charging system. The charging circuit can share the power switches of the asymmetric converter and phase windings of SRM to charge the battery, and can reduce the...
Keeping position (KP), Zero torque (ZT) control and power factor correction (PFC) with DC battery charger integrated Switched Reluctance Motor (SRM) drive is presented in this paper. For the proper DC charging with SRM winding as an inductance element of the PFC Circuit, a simple novel current sharing function (CSF) is proposed as a current reference distributor of the charging controller. The proposed...
Nowadays, the technology of manufacturing electrical vehicles (EVs) and hybrid electrical vehicles (HEVs) is the most important issue for manufacturers and consumers thereof. The main parts of these cars are their motors and battery packages. Low cost, ruggedness and suitable torque/mass ratio are some of the switched reluctance (SR) machine features that make it superior to permanent magnet and induction...
To apply model predictive control (MPC) to autonomous vehicle, certain compromise has to be made. To avoid this, we propose a nonlinear MPC (NMPC) controller, controlling vehicle velocity and steering simultaneously. The optimization solver is based on genetic algorithms, which provides a flexible structure to design the cost function and constraints in a more accurate and straightforward way. On-field...
The realization of vehicle to grid technology requires the development of an appropriate bidirectional electric vehicle charger. This paper presents the development of a bidirectional vehicle to grid charger, which consists of a front-end bidirectional AC/DC converter and a back-end bidirectional buck-boost DC/DC converter, separated by DC-link capacitor. The developed charger enables bidirectional...
For hybrid AC&DC micro-grid, this paper proposes a new generating system based on dual stator-winding induction generator (DWIG). This generating system can realize bidirectional energy flow, reduce the number of converters and simplify the structure of micro-grid. To meet the requirement of supplying AC and DC power simultaneously, this paper proposes the control winding voltage oriented (CWVO)...
Battery state of health estimation is a very important issue related to electric vehicle operation. A knowledge of the progression of the battery state of health in an electric vehicle operation is highly desirable as a reduced battery state of health limits the practical and economic operation of the vehicle. The aim of this approach is the parametrization of a holistic battery aging model. The model...
Magnetic fields in healthy equipment generally assume a symmetrical distribution around the axis of their excitation. The change in symmetry of these fields during a fault condition is investigated. Asymmetry in the leakage flux around a transformer winding due to an inter-turn fault is studied under various fault severity levels. A fault detection technique using leakage flux is developed based on...
The economic viability of the incorporation of electric vehicles (EVs) into a vehicle fleet strongly depends on the lifetime of the EVs. In this paper a model including a nonlinear optimization algorithm is used to optimize the charging process of an EV fleet in terms of costs. The model takes the arising costs due to the calendaric ageing of the traction batteries and the electricity costs during...
The current publication introduces the flux barrier design method and the concrete design of the synchronous reluctance machine with the reduced torque pulsations. The reviewed method provides the accelerated approach for designing of rotor flux barriers, based on Fast Fourier transforms and simple mathematical expressions. The proposed method has been utilized in the rotor design of synchronous reluctance...
This paper presents a novel carrier based multilevel modulation for modified dual three-phase open-winding inverter applicable for low-voltage/high-current applications. A standard three-phase voltage source inverter (VSI) is connected across the open-winding of both ends of the motor. Each VSI incorporates an additional bi-directional switching device (MOSFET/IGBT) per phase and all three legs link...
In order to realize more optimized current stress of switches and soft switching in a wider range, this paper proposes a unified high-frequency AC buck/boost (UHFBB) control strategy for dual active-bridge bidirectional converter (DAB-BDC). The evolution of UHFBB theory is derived from buck and boost DC/DC converter operated in DCM. A multi-variable solving method is proposed to achieve the duty ratios...
To study the unevenness of the gas concentration along the fuel cell gas channel and validate the simulation results on gas concentration distribution in along-the-channel direction, a large electrochemical surface area single cell with multiple gas sample ports both in cathode and anode is designed. The sample ports are connected to micro solenoid valves and converged to gas chromatography (GC)....
this paper presents an embedded signal analyzer for AC impedance identification of the PEM fuel cell after a fluctuation signal of current is injected into the stack. The key part of the analyzer is the analog signal processing unit designed with special consideration. The analog signal processing unit has the capability of extracting small fluctuation signals of the current, voltages of the stack...
The long turn-on time of floating power switches in BMS (battery management system) employ charge pump circuits generally. It is powered from the batteries so that power losses analysis is very important, but not easy. In this paper, a charge pump circuit will be introduced, which can be easily employed for BMSs as well as its operating principle will be explain in detail with calculation of the power...
This paper work proposed a five-phase five-level open-/star-winding multilevel AC converter suitable for low-voltage/high-current applications. Modular converter consists of classical two-level five-phase voltage source inverter (VSI) with slight reconfiguration to serve as a multilevel converter for open-/star-winding loads. Elaborately, per phase of the VSI is built with one additional bi-directional...
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