Electric Vehicle Power Transfer System Using a Three-phase Capable Coupler
This document covers the general physical, electrical, functional, testing, and performance requirements for conductive power transfer to an electric vehicle using a coupler capable of, but not limited to, transferring three-phase AC power. It defines a conductive power transfer method including the digital communication system. It also covers the functional and dimensional requirements for the vehicle inlet, supply equipment outlet, and mating housings and contacts.
Rationale: The existing SAE conductive charging standards do not cover a way for the vehicle to directly utilize three-phase AC power and existing IEC standards do not cover common North American voltages. Several manufactures provide this capability without a common standard in this areas hurting wide adoption. Three-phase power transfer is targeted at commercial and industrial locations or other areas where such power is available. Grid stability is enhanced by presenting a symmetric three phase load, especially at high power levels.