The high adoption of light electric vehicles (LEVs) indicates that compact, efficient, and reliable battery charging systems are required. The traditional two-step chargers using diode bridge rectifiers have high conducting losses, large DC-link capacitors, and reduced life cycle, which limits their performance and reduces heat. To counter this problem, there is a proposal of a new bridgeless single-converter battery charger, with the aims of enhancing energy efficiency, reducing stress on components and improving overall reliability. The system avoids the use of diode bridge and minimizes the power loss as well as uses bi-directional DC-DC converter to allow regenerative braking and energy recovery. Proportional-integral controller guarantees the stable work and the best use of charging capacity and the opportunity to cooperate with the renewable energy sources allows considering the given system as an environmentally friendly variant of transport in the future. Its unique feature is the combination of small size, greater efficiency, regenerative, and real-time flexibility, and thus is a giant leap in the LEV charging technology.

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Efficiency Optimization of Light Electric Vehicles via a Bridgeless Converter-Based Battery Charging System

  • S. Joyal Isac,
  • Shaik Ibrahim,
  • Kewin Immanuel Alwin

摘要

The high adoption of light electric vehicles (LEVs) indicates that compact, efficient, and reliable battery charging systems are required. The traditional two-step chargers using diode bridge rectifiers have high conducting losses, large DC-link capacitors, and reduced life cycle, which limits their performance and reduces heat. To counter this problem, there is a proposal of a new bridgeless single-converter battery charger, with the aims of enhancing energy efficiency, reducing stress on components and improving overall reliability. The system avoids the use of diode bridge and minimizes the power loss as well as uses bi-directional DC-DC converter to allow regenerative braking and energy recovery. Proportional-integral controller guarantees the stable work and the best use of charging capacity and the opportunity to cooperate with the renewable energy sources allows considering the given system as an environmentally friendly variant of transport in the future. Its unique feature is the combination of small size, greater efficiency, regenerative, and real-time flexibility, and thus is a giant leap in the LEV charging technology.