A single‐stage bridgeless isolated positive output Cuk configuration‐based unidirectional onboard battery charger

• Published in: International journal of circuit theory and applications 2024-01, Vol.52 (1), p.396-419
• Main Authors: Sivaperumal, Narthana, Jothimani, Gnanavadivel
• Format: Article
• Language: English
• Subjects: Batteries; Battery chargers; bridgeless isolated positive output; constant current; constant voltage; diode bridge rectifier (DBR); Diode rectifiers; discontinuous conduction mode (DCM); Electric potential; Electric vehicle charging; Electric vehicles; light electric vehicles (LEV); Power factor; Stability analysis; Topology; Voltage; zero current switching
• ISSN: 0098-9886; 1097-007X
• DOI: 10.1002/cta.3757

Summary As power factor correction rectifiers play a key component of electric vehicle (EV) battery charger, the advancements in designing of improved power quality‐based EV charger become more significant in modern era. This article exposes a single‐stage bridgeless isolated positive output (BIPO) Cuk PFC converter with a noninverted output signal. The input diode rectifier present at the input is redeemed by the bridgeless topology that eliminates the serious power quality (PQ) issues and proffers the eminent charging solution for the light electric vehicles (LEV). Unlike the conventional Cuk converter, the noninverted outcome of the BIPO converter does not require a separate amplifier for converting negative to positive output voltage. The preferred charger utilizes a single voltage and current sensor to synchronize the battery charging control in the constant current (CC) and constant voltage (CV) phases of charging. Therefore, the converter encompasses intrinsic zero current switching (ZCS) and offers low‐cost solution to the charger with reduced control complexities. The extensive state space approach is executed to analyze the marginal stability of the presented system. Moreover, the detailed loss modeling is addressed to show the charger's efficacy curve at the standard conditions. A hardware prototype of 350 W, 60 V/4 A charger is implemented to validate its steady‐state and dynamic performance. This article exposes a single‐stage bridgeless isolated positive output (BIPO) Cuk PFC converter with a noninverted output voltage. The preferred charger provides intrinsic zero current switching (ZCS) of the devices and employs minimal number of sensors to synchronize the battery charging control in the constant current (CC) and constant voltage (CV) modes. It encompasses high‐frequency isolation with the effective magnetic utilization of the components and hence proffers low‐cost charging solution to the light electric vehicles (LEV). The proposed converter's stress and stability analysis, loss modeling, simulation, and experimental results have been presented.