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This paper presents a time-delayed model predictive control for power converters used in vehicle to grid and grid to vehicle systems. Finite-based model predictive control has proven to be an alternate digital control method for power converters. However, there are some real-time implementation issues, including specifically time delay, that have to be addressed in order to achieve the system reliability...
This paper deals with the implementation of a Maximum Constant Boost Control (MCBC) for a 9-Switch z-source power inverter supplying two induction motors. This topology allows greatly reducing the number of power switches, the switching-losses, the volume, and therefore the system cost. In Electric Vehicle (EV) application, a 9-switch power inverter requires a DC-DC converter to boost batteries output...
In recent years, the wireless EV chargers have been spotlighted as convenient, safe, and clean apparatus. In this paper, proposed has been a newly developed large-gap wireless power transfer EV charger which can communicate control signal to a power feeding unit from a power receiving unit without any additional communication equipment. The wireless power transfer (WPT) system with a single-ended...
This paper presents work on the hysteresis band control for output current regulation in a direct matrix converter in order to drive an induction motor. The hysteresis band controller offers excellent dynamic performance. It has been extensively researched for the voltage source inverter and inverter based drive systems, but it has not been investigated within the context of a matrix converter or...
This paper is focused on the analysis of voltage source inverter (VSI) loss model for automotive applications. The converter is generally integrated in a thermally challenging environment and requires therefore a reliable, modular and accurate model for their evaluation. This work analyses first the current methods for the evaluation and the calculation of the losses and then present different solutions...
State-of-the-art modulation techniques, such as space-vector modulation for the generation of three-phase alternating current, result in strong peaks in the output spectrum at the switching frequency and its harmonics. We present a space-vector implementation of a novel control scheme and modulator for commercial electric vehicle inverters, that freely shapes the spectrum of the switching distortion...
MOSFET devices have a body diode that allows reverse conduction, additionally, when a negative drain-source voltage is present, the MOSFET channel conduction can also be controlled by applying a gate-source voltage above the threshold voltage level. In a three phase inverter this results in parallel conduction of the diode and MOSFET when voltage and current differ in sign. This paper analyzes the...
This article focuses on Inductive Power Transfer to implement dynamic charging for electric vehicles. The system proposed is composed of adjacent 50-cm-side square coils set on the road, with only the coil under the vehicle activated for power transfer. It relies on a symmetrical circuit coupled to a symmetrical control using ZPA regulation to operate frequency-varying inverters, using soft switching...
In this paper, we clarify the problem of power supply characteristics when the secondary coil of the PS resonance type DWPT system, and have proposed a technology that enables high efficiency and stable power supply at the time of moving the secondary coil and revealed its effectiveness.
Energy saving is arguably the most important factor in issues regarding energy and carbon emission. For electric vehicles in particular, saving energy extends the driving range. This can be achieved with a highly efficient variable-speed drive that can cover a wide speed range, and changing the number of poles is one way of realizing such a drive. In addition, electric vehicles must be fault tolerant...
The presented paper evaluates measurement results and reports about further development from the vehicle to grid system presented in [1] and [12]. It uses a number of mass-production electric vehicles in sink and source mode to balance the load of an industrial plant by cutting off its peak loads. The actual load is detected and the balancing power is calculated by a predictive algorithm which keeps...
The requirement of energy storage via battery/EV is highly anticipated in occurrence of power outages. Other benefits include saving the money in buying peak time electricity and support the grid when grid power is deficit against the load demand. In this paper, optimum size of energy storage in a grid connected photovoltaic (PV) system is proposed. The methodology of energy flow decision is developed...
A complete test for conducted EMI from the direct current fed (DC-fed) alternating current (AC) motor drive system in an electric vehicle (EV) under load conditions is set up to analyze the conducted voltage and current of high voltage DC cables in a frequency range of 150 kHz–108 MHz at 500rpm and 2500rpm with 50Nm load torque of the EV motor with space vector pulse width-modulation (SVPWM) control...
A DC-DC converter for high-power battery chargers with the power-capacity over 6.6-kW for electric vehicle (EV) is proposed in this paper. Due to a new architecture, the proposed converter achieves the reduction of conduction loss at the primary-side by as much as 50% and has many benefits such as reduced circulating current, less duty-cycle loss, and lower secondary-voltage stress. In addition, its...
Compared with single-side cooling inverter, double-side cooling inverter is more advantageous for the application of electric vehicle in terms of efficient cooling performance, mechanical robustness and high power density. IGBT short-circuit fault is one of the detrimental factors to cause the whole inverter failure. From the perspective of inverter, this paper analyzed the fault condition of single...
Recently, the wireless EV chargers have been spotlighted because of safe, and easy use apparatus. Proposed has been a newly developed large-gap wireless power transfer EV charger which can communicate control signal to a power feeding from a secondary side with no communication equipment. The SEPP inverter WPT apparatus is designed for large-gap loose-coupling condition by characteristic-impedance...
This paper presents the results of research into the application of an active battery switching system in the drivetrain of a prototype electric vehicle. The system's purpose is to increase the drivetrain's electrical efficiency especially in the partial-load range. Efficiency is increased using a switching unit that allows the vehicle's traction-battery circuitry to be changed during operation and...
It is known that energy source used in car today comes from fuel, which generates pollution to the environment. The scientists have forecasted that the amount of oil will be decreasing in the future. In the present, scientists and engineers seek for new energy sources to reimburse oil. Causing no harm to the environment is the first priority. To overcome this problem, the electric vehicle is the popular...
Although great effort has been devoted with various approaches on the improvement in energy efficiency of electric vehicles, much of the focus has been on the design of electric devices and power electronic systems and of energy storage systems with energy management strategies. This paper proposes a bus voltage control method that actively and dynamically controls the bus voltage applied to the inverter...
High energy density lithium ion battery (LiB) is utilized to power the electric vehicles (EVs). However, there are several problems such as low power density, high cost and cycle lifetime with LiB. A hybrid power source three level inverter was proposed to assist battery power by electrical double layer capacitor (EDLC) to cut the peak power of LiB. Extending battery life is expected by reducing maximum...
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