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This paper presents a new single inductor Dual Input-Dual Output dc-dc converter for a standalone hybrid energy system. The converter has two unidirectional ports, one bidirectional port for storage element and one output port. The converter operates in dual input-dual output mode, dual input-single output mode and single input-single output mode. Both the input sources can power up the load individually...
Full Energy Booster injectors for Storage rings are complex systems and somewhat reduced versions of the ring itself. They provide accelerated electrons that usually have the same energy of the storage ring accumulated beam. Power converters used to deflect, focus and defocus the electron beam in the booster must carefully follow a waveform both in time and in current values, as it is mandatory to...
Current source modular multilevel converter (CSMMC) is a potential topology for the high-power applications with low-voltage and high-current requirements. One of the most challenging issues associated with the CSMMC is the submodule inductor currents imbalance if it is not properly controlled. This paper presents a control method for submodule inductor currents balancing in a CSMMC. The control method...
This paper presents design and implementation of a Integrated boost-flyback converter (IBFC). Operation of the IBFC is described and its key voltage and current equations are given. The practical design of a 96W, 12V-to-48V, IBFC is demonstrated. Experiment on the prototype IBFC shows that it operates with good output voltage regulation and achieves the highest efficiency of 87%.
The shape of an inductor for pre-heating and/or post-heating metal parts is optimized with the aim to reach the prescribed pattern of temperature along the place to be consequently welded by laser beam. The task represents a nonlinear inverse multi-parametric problem that is solved for a given range of field current frequencies. While the direct part of the problem is solved by a fully adaptive higher-order...
A new step-up basic switching cell formed by four passive elements and two diodes is proposed. It is inserted in a boost converter in order to obtain a new hybrid PWM non-isolated converter able to provide a large DC gain, as required as front-end to electrical grids supplied by solar or fuel cells. A family of converters can be created by inserting the defined switching structure in any step-up converter...
In this paper, the ripple free operating method of two-stage boost type dc-dc converter is proposed which is suitable for PV and fuel cell systems. The ripple free two-stage boost type dc-dc converter (RFTSBC) is composed of a conventional interleaved boost converter and a cascade boost type chopper. The primary stage is driven at a fixed duty ratio to make the input current ripple of the RFTSBC close...
This paper presents the circuit design of current-fed push-pull resonant inverters for cold cathode fluorescent lamps (CCFL). The current-fed push-pull resonant inverter acts as a sinusoidal current source to drive the nonlinear CCFL loads. The sinusoidal current source may be implemented with a center-tapped transformer and an inductor, or with a general transformer and two inductors. Both designs...
State-space average value modeling of dc-dc converters in continuous and discontinuous modes have been conferred remarkable recognition in the literature. This paper presents different aspects of averaged value modeling of flyback converter operating in discontinuous conduction mode (DCM). Moreover, a second order sliding mode controller is designed and analyzed for flyback converter. The advantages...
Mathematical model of laser heating with induction pre- and/or post-heating is presented and solved. The purpose of this combined way of heat treatment is to reduce residual mechanical stresses in the surface layers of the processed material produced by high temperature gradients at the spots heated by the laser beam. The 3D model takes into account all important nonlinearities including the temperature...
In many applications such as power converters for fuel cells or distributed generating (DG) systems there is a need to increase the DC voltage before being inverted to AC grid or load with a higher voltage. The standard approach is to use a DC-DC converter to boost the input voltage followed by a buck inverter to converter the increased DC voltage into AC. Having two stages of conversion results in...
This paper presents a sliding mode control for a three-phase grid-connected voltage source inverter with vector operation. The design of closed-loop system is based on the sliding-mode theory, and it is carried out with the help of a converter large-signal dynamic model. The closed-loop system improves the transient response and minimizes the steady-state error. Essentially, the contribution of this...
Thermoelectric Generators (TEG) can harvest a part of the thermal energy otherwise lost in the exhaust gases of vehicles and are combined with Maximum Power Point Tracking (MPPT) schemes to maximize the power output. This paper proposes a novel TEG MPPT scheme named High Frequency Injection (HFI) method. The method injects a high frequency voltage to the TEG and yields a power with a high frequency...
This paper presents a new DC-DC converter that is designed to provided selected polarities at desired voltage levels. With the new switching converter topology, the converter can boost and buck the input voltage and theoretically achieve infinite levels for either positive or negative polarities. This converter can provide a wide range of output voltage and use only one switch to perform the power...
To cope with power from large-scale renewable systems, more and more power electronic converters are used in parallel. Typically, carrier interleaving is used, thus leading to a decrease in filtering requirements. However, this causes additional circulating current to flow between the modules of the converter. The modules of the parallel converters are Voltage Source Converters (VSC). Usually, a coupled...
In this paper, the efficiency of the induction system composed of 4 small coils with a given connection among them for cooking applications is analyzed. The 4-coil configuration has several advantages with respect to the single-coil induction system, for instance, higher flexibility and better heat distribution in the pan. Different configurations can be arranged according to series or parallel connections...
The topology of modular multilevel converters (MMC) is investigated in this paper. First, single phase half bridge inverter with split wound coupled inductors was studied, it was found that more voltage levels can be generated by using split wound coupled inductors. Therefore, new MMC topology was proposed by the analysis result, therein, two more diodes were used for each arm, and split wound coupled...
The design of power converters that have both high efficiency and high power density performance while maintaining the lowest possible cost and highest possible reliability is a challenge for power electronics engineers. Therefore, optimization techniques are often used to obtain the optimal solution for a given set of specified objectives. As a result, engineers must devise the correct methodology...
The operation of a distributed maximum power point tracking (DMPPT) photovoltaic (PV) system with a current source inverter (CSI) is confirmed. We proposed a current-linked distributed PV system instead of a voltage-linked one. All the previous studies of DMPPT PV systems use a voltage source inverter (VSI). Moreover, all commercial power optimizers that are provided by Solar Edge, Solar Magic, Tigo...
High voltage pulse generators can be used effectively in water treatment applications, as applying a pulsed electric field on the infected sample guarantees killing of harmful germs and bacteria. In this paper, a new high voltage pulse generator with closed loop control on its output voltage is proposed. The proposed generator is based on DC-to-DC boost converter in conjunction with capacitor-diode...
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