Z43 is part of the EMPIR-funded joint project “Metrology for inductive charging of electric vehicles” (MICEV). The aim of MICEV, headed by Dr. Mauro Zucca of Italy’s Istituto Nazionale di Ricerca Metrologica (INRiM), is to advance inductive power transfer (IPT) for EV charging by developing metrology techniques for measuring IPT efficiency, transmitted power and reliable demonstration of compliance with existing safety standards for human exposure to magnetic fields. The kick-off meeting was held on 21 and 22 September at INRiM in Torino, Italy, where parners from federal and academic research institutions as well as SMEs in Italy, France, Germany, Sweden, Spain, the Netherlands, the UK and Switzerland came together to discuss how these challenging goals can be achieved.
Inductive charging is a promising charging technology that will be deployed by manufacturers of electric vehicles in the near future. This technology offers many advantages, such as the possibility of charging along the road while driving, small batteries and high-efficiency power transmission, as well as a reduction in CO2 emissions and oil consumption. Reliable, accurate and traceable electric power measurements are needed for IPT applications, including electric vehicle manufacturers, as they are subject to strict international requirements concerning accuracy, safety and, in the near future, energy billing. MICEV focuses on simultaneously and accurately measuring the efficiency of the IPT and the actual transferred power to the vehicle and also provides the means to sound and reliably demonstrate compliance with existing safety standards for human exposure.
The project is composed of 6 Work Packages (WP):
The aim of this work package is to setup a reference measurement chain able to accurately measure the DC power and the AC power due to the ripple induced by the AC/DC power conversion. The output of the WP1 will be: (i) a measurement system for on-site measurements (MU) (ii) a new calibration facility, (iii) improved measurements capabilities for National Metrological Institutes, (iv) the estimation of the uncertainty associated with the on-board measured power, (v) the calibration of the MU in the system (ii) and its improvement to obtain the PwMU.
The aim of this work package is to measure the efficiency of the static IPT taking into account the parameters of influence, particularly airgap and misalignment between the coupled coils, and working condition. The WP will focus on the development of a simplified software specifically developed for the measurements.
The aim of this work package is to define the metrological requirements for a power measurement unit for dynamic IPT, including waveform bandwidths, distortion, transmitted power and estimated efficiency, as a function of a number of parameters (eg different speeds of the vehicle, vehicle trajectories when approaching the charging spot, number of vehicles recharged at the same stations).
This WP aims to provide detailed guidance and on how to assess human exposure to the EMF generated by electric vehicle IPT systems. Both computational methods and measurement survey techniques are considered, and the methods for traceability, uncertainty analysis and verification established. This work will provide the framework for future EMF safety standards for electric vehicle IPT systems.
SPEAG will provide prototypes of its novel handheld gradient field probe to the partners, develop a calibration facility and a 3D scanning system based on optical tracking. The IT’IS Foundation will contribute with its expertise in numerical assessment of exposure to IPTs. Human anatomical models (ViP) in specific postures and new electric vehicles models will be provided as well to simulate critical exposure of real-case scenarios.
The project is funded by EURAMET in the framework of the European Metrology Programm for Innovation and Research (EMPIR) for a duration of 36 months.
For more information contact Ilaria Liorni at email@example.com.