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in this paper, a new single-stage isolated bi-directional AC-DC converter with the appropriate controller for Electric Vehicle application is proposed. The topology uses only 6 active switches. Single-stage power conversion reduces the cost and volume. Instead of using an Electrolytic capacitor with limited life-time, it uses a film capacitor. This increases the reliability of the system. The low...
An isolated single-stage bi-directional AC-DC converter with no electrolytic capacitor for electric vehicle battery charger application is proposed. The topology utilizes a single-stage series resonant dual Half-bridge AC-DC converter to transfer the power and an active-shunt filter on the DC-side to absorb the 100/120Hz current ripple and prevent it from going to the battery. Diverting the low frequency...
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...
In this paper, to achieve a compact and efficient bidirectional AC-DC converter for an electric vehicle, a single-stage topology with 6 switches is used. The topology utilizes two half-bridge circuits and a series resonant LC circuit. The topology reduces the cost and its volume by having a low number of switches. A control method utilizing the duty-cycle of two half-bridge circuits and the phase-shift...
High reliability and ever increasing cost-effectiveness of power electronics components and digital processors have resulted in high interests in inductive power transfer techniques. The interest is directed mostly at electric and hybrid passenger car battery charging, although the first solutions have already been conceptualized and turned into homologated products for much higher power levels for...
Frequency modulation is often used in series resonant converters to gain output voltage regulation. Variable frequency however brings challenges for EMI filter and switch driver design and the desirable zero voltage switching cannot be maintained at light load conditions. This paper presents a fixed-frequency series resonant converter with phase shift modulation and an adaptive passive auxiliary circuit...
This paper proposes a family of single-phase single-stage step-up/down ZVS inverters derived from adding an LC series resonant circuit to the conventional differential inverters and controlling them in such a way that ZVS happens for individual switches. Differential inverters are single-stage step-up/down inverters. Applying the ZVS technique to them enables them to operate under a higher switching...
In this paper DC-AC differential inverters, which are capable of stepping-up the DC voltage in a single-stage, are studied. Due to the reduced number of devices, they are compact, efficient and low cost. Due to their unique characteristics, they can be used in many applications such as PV, UPS and fuel-cell. This paper introduces a new control method which utilizes a different set of voltage references...
In this paper, recent topologies for bi-directional AC-DC converters are reviewed. The reviewed topologies are efficient, isolated and compact and can be used as an on-board battery charger for EV or HEV. It is assumed that each converter is made up of a set of building blocks and choice of these building blocks results in different topologies. The topologies are divided into two families: single-stage...
This paper proposes a new ZVS technique for full-bridge single-phase inverters that has several applications such as PV ac modules. The technique uses smaller passive filter between inverter and grid which results in a simple control, simpler design and a more compact and more efficient topology. The proposed topology uses a passive LC small auxiliary circuit which operates under fixed frequency and...
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