ISO 19363:2020 pdf download – Electrically propelled road vehicles – Magnetic field wireless power transfer – Safety and interoperability requirements
Requirements regarding system safety and system performance are relevant and applicable for safe operation of any MF-WPT system (including dedicated single-supplier solutions) while still assuring some base level of performance.
The interoperability requirements supplement the safety and performance requirements in order to allow for interoperability of a supply device and an EV device provided by independent suppliers.
Two compatibility classes have been specified to accommodate these design considerations:
— Compatibility class A: EV devices of this class are intended for interoperable application and are required to meet a set of safety and performance requirements. Cross-supplier interoperability is tested with the normative reference supply power circuits as specified in this document.
— Compatibility class B: EV devices of this class are not intended for interoperable application but still are required to meet the set of safety requirements; performance requirements may be different than those of compatibility class A. EV devices of this class are tested with supplier-specified supply power circuits.
7.1 General Unless otherwise specified the requirements in Clause 7 refer to EVPCs of both compatibility classes. Conformance to the requirements in 7.2 to 7.6 is tested according to 7.7, whereas EVPCs of compatibility class A are tested with the normative reference supply power circuits described in Annexes A and B, and EVPCs of compatibility class B are tested with supplier specific supply power circuits. The supplier shall specify the rated conditions of an EVPC according to Table 1.
7.2 Frequency
MF-WPT for EVs is allowed to operate in the frequency range of 79 – 90 kHz. The operating frequency during power transfer is set by the supply device based on negotiations with the EV device.
7.3 Geometrical operating space
An EVPC shall meet the requirements of 7.4 and 7.5 within its geometrical operating space defined by its secondary device ground clearance range and the alignment tolerance area according to Table 2.
The centre alignment points of supply power circuits are determined according to IEC 61980-3. The centre alignment point(s) of the EVPC shall be specified with respect to the centre alignment points provided by the supply power circuit. The requirements in this document apply to all centre alignment points specified for an EVPC. The vehicle manufacturer may specify only one centre alignment point for alignment with a primary device of a different topology. NOTE The selection of a single point can be due to a variety of reasons, for example the influence of the EV on the distribution of the magnetic field or the position of the EV within a parking spot.
7.5 Requirements for power transfer efficiency
Power transfer efficiency is the ratio of the output power of the EVPC (output of block #23 in Figure 1) divided by the input power of the supply power circuit (input to block #13 in Figure 1). An EVPC shall support the minimum power transfer efficiency according to Table 3 when operated at rated output power with a supply power circuit. An EVPC should support the minimum power transfer efficiency according to Table 3 when operated at power levels below the rated output power. Typical local supply network connections should be considered.