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This paper proposes a parallel energy-sharing configuration of energy management control for fuel cell hybrid vehicles (FCHVs) application. The hybrid energy source consists of fuel cells (FCs) and energy storage units (ESUs) made up of battery pack and ultracapacitor (UC) module. The aim of the control is to regulate the DC link voltage, which is connected to the traction DC motor via the h-bridge...
This paper investigates the feasibility of using an alternator as means of harvesting energy from a stationary exercise bicycle. A switch mode converter was designed to regulate the current in the alternator rotor winding, thus regulating the power required to pedal, and consequently the power output of the bike. The complete controller design consists of this power stage, a control circuit, a startup...
This paper presents an high frequency link topology based three phase double conversion uninterruptible power supply (UPS) system. A three winding high frequency transformer is designed as the central power exchange node between the input, output and battery. The different voltage levels of the grid, load and battery are interfaced through a compact and inexpensive isolation transformer and the presence...
The performance of three-phase Self-Excited Induction Generator (SEIG) with Static Synchronous Series Compensator (SSSC) is investigated to feed various static loads. The employed SSSC is a three-phase, Insulated Gate Bipolar Transistor (IGBT) based, PWM operated, Current-Control Voltage source converter (CC-VSC). The reference current to generate the gating signals is obtained by employing only one...
A new high voltage gain dc-dc converter is proposed on this work as a viable solution to step-up a low battery voltage into a high voltage dc link. This converter is suitable for non-isolated on-line UPS systems with common neutral connection, that improves bypass circuit installation. Furthermore, smaller size, higher efficiency, and increased reliability are features that spread the transformerless...
A novel power converter for battery used in the Plug-in Hybrid Electric Vehicle (PHEV) is proposed, which could charge and discharge the battery effectively. The system is composed of two parts: a three phase full bridge PWM rectifier and a DC/DC converter. The PWM rectifier is utilized to rectify the three phase AC to DC voltage, which should be higher than the battery terminal voltage. The DC/DC...
This paper presents a study related to a more efficient energy management between battery and Supercapacitors (SC) for Hybrid Electric Vehicle (HEV) applications. This idea is due to the present trend in the field, knowing that the major drawback of the HEV is the autonomy problem. Thus, using supercapacitors and battery with a good energy management strategy improves the HEV performances. The originality...
In this paper, a new concept of bi-directional battery charger for PHEV/EV with photovoltaic generation system and operation algorithm of battery charger system is proposed. A novel battery charger system with photovoltaic generation is designed to have function of photovoltaic power conversion and battery charging/discharging. Also, considering sensitive photovoltaic source according to in the environment...
This paper presents a efficient stand-alone battery photovoltaic (PV) lighting system which can provide functional illumination based on power light-emitting diodes (PLEDs). PLED with specific features of small size, long life and high-brightness light will be choices of future light sources. The PLEDs are feed using a lead acid battery that is charged with a PV panel. This paper presents an interface...
Battery equalization, aiming at keeping the state of charge of inside cells in the same level, is of great importance to maximize the capacity of whole battery pack and keep cells away from overcharge and overdischarge damage. In this paper, based on the analysis of bi-directional Cuk converter, we have proposed a fuzzy controller to adaptively tune the equalizing current. The inputs of fuzzy controller...
With the application of renewable energy, the distributed energy network is researched and developed widely. This paper designed the distributed stand-alone PV generating system with battery backup. The coordinated MPPT control of several parallel modules is designed to increase PV utilizing efficiency. The multi-variable multi-loop controller is designed to control the currents of each module, the...
A new non-isolated boost converter with high voltage gain is proposed in this work. This converter is suitable for nonisolated on-line UPS systems, with common neutral connection, that improves bypass circuit installation. The adopted control strategy uses a hybrid control that implements both analog and digital controllers, that implements the average current mode control. It presents characteristics...
Requirements of the battery charger circuit for plug-in hybrid electric vehicle applications are defined and a PWM boost rectifier cascaded with a bidirectional DC/DC converter has been proposed in this paper. Operation of the circuit has been analyzed and its mathematical model has been derived to investigate the design consideration of the circuit parameters. Feedback controller requirements to...
In this paper, a two-stage-cascaded scheme is presented to charge two Li batteries. The first stage consists of a boost converter which is used to step up the input voltage to some value and takes voltage-mode control, whereas the second stage is comprised of two paralleled buck converters which are used to charge two Li batteries under voltage-mode control and constant current control. Above all,...
In this paper, a cell balancing circuit for the Lithium-ion battery string based on the Flyback topology is proposed. The proposed circuit draws the charge out of the high voltage cell and recovers it to the overall battery pack. With the selectivity of the target cell, the proposed circuit uses the minimized power path to simplify the circuit and optimize the balancing efficiency. The circuit also...
Recently, a smart grid has been attracted attention from the background of the introduction promotion of natural energy. At present, a smart grid based on AC grid has been proposed. However, no paper or article has been presented or published on a smart grid based on DC grid. This paper presents a AC/DC hybrid power system. The system has advantages on both DC and AC grid. The power system consists...
A real-time model of a current controlled plug-in electric vehicle (PEV) parking lot (SmartPark) has been presented in this paper. The controller of the SmartPark is designed in such a way that the active and reactive power transaction with the grid can be controlled independently. Also, the controller limits the current going out of the vehicle during grid faults for batter protection. The realtime...
This paper presents a lithium-ion battery recharging circuit with an improved charger system topology for portable devices and handheld gadgets. The proposed charger topology uses an operational amplifier with NMOS input for a smooth transition between current control loop and voltage control loop and to control a power pass element device. Using the above-mentioned abilities, a complete charging...
This paper presents a prototype of a Proton Exchange Membrane (PEM) fuel cell hybrid system with a battery bank and all the power electronics and control needed to manage the system. The hybrid system has been built to supply DC loads. Voltage and current levels established on electrical interconnection points are achieved with several power conditioning stages controlled by Pulse Width Modulation...
In this paper, we propose a model predictive control of current and voltage of a three-phase voltage-source AC/DC converter. A Li-Ion battery is connected to the AC/DC converter through a DC/DC converter. The AC/DC converter is composed of an inner-loop current controller and an outer-loop voltage controller. The voltage controller feedbacks the dc-link voltage and outputs a current reference to the...
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