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A Brief Discussion on the Topology and Leakage Current Requirements of Electric Vehicle On-Board Chargers (OBC)
1.Development Trends of On-Board Chargers (OBC) for Electric Vehicles China’s new energy vehicle (NEV) market has experienced rapid growth, with annual sales reaching 6.887 million units in 2022 (a 93.4% year-on-year increase), capturing 26% market share. According to the China Association of Automobile Manufacturers (CAAM), NEV sales are projected to exceed 9 million units in 2023, growing by 35% […]
Analysis and Modeling of Grid-Connection Impact Mechanisms in Inverters and RCMU Impact Withstand Test
1.Inverter Grid-Connection Impact Mechanism During the instant of grid synchronization in photovoltaic (PV) systems, grid-connected inverters frequently generate short-duration inrush currents. This phenomenon directly compromises grid stability and power quality, severely undermining inverter reliability. The core mechanism originates from transient deviations in output voltage versus grid voltage (amplitude, phase, or frequency) during synchronization, coupled with […]
Feasibility Analysis of IEC 60947-2 for Leakage Current Protection Standard Certification in EV Charging Equipment
1.Abstract European regions enforce stringent standards and certification requirements for EV charging equipment. This paper explores how to meet these standards—specifically addressing different IEC leakage current specifications—to reduce design complexity and costs. Through detailed analysis of mechanical coupling, electronic coupling, leakage current detection, and control circuitry within the standards, we propose a standards-compliant feasible solution. We invite readers to engage in discussion […]
Discussion on Requirements and Applicable Standards for Electric Vehicle On-Board Chargers (OBC)
The On-Board Charger (OBC) is an interface component of Electric Vehicles (EVs). It must interact externally through connections to either the public grid or dedicated EV supply equipment. These devices interface with the AC grid, and their ratings and requirements fall outside the manufacturer’s control. Consequently, any vehicle equipped with a built-in charger must comply […]
