On Track: EV testing equipment
An annually increasing number of vehicles emit ever increasing amounts of CO2. One possible solution to this global problem is to reduce the number of vehicles burning fossil fuels. Electric vehicles could be part of this solution. E-mobility combined with emerging smart grid technologies make better use of existing and future energy generation technologies. Every household with an electric vehicle will need a charging facility and these need to be supplemented by high current fast chargers in public places. Slow chargers for home use tend to be AC and fast chargers for public use DC.
Any charging station connected to the public power supply has to be tested for EMC and safety at both the public main input and the output (AC or DC). Conformity assessment follows International Electrotechnical Commission (IEC) regulations. But the nature of the problem prompted the United Nations to issue standards with a global reach. High current DC connections with fast chargers can lead to problems when testing with standard IEC compliant test systems. Special high current CDNs and DC-DC damping circuits are designed to help reduce such issues. With voltages up to 1500Vdc and currents to 200A, future E-mobility is secure with EMC PARTNER test systems.
Standard requirements
In the latest ECE Regulation No. 10, burst and surge tests are mandatory for both vehicle and Electronic Subassemblies (ESAs). Burst test requirements are specified in subchapters 7.8 and 7.15, whereas requirements for surge test in subchapters 7.9 and 7.16 respectively. EMC PARTNER offers high-end, reliable and customisable test systems to perform mentioned tests.
IMU-MGS or IMU-MGE generators can output burst signals up to 4, 5, 6 or 7 kV and surge signals up to 4, 5, 6 or 8 kV depending on the selected model.
Coupling Decoupling Networks (CDNs)
A broad range of Coupling Decoupling Networks (CDNs) is available for three-phase AC EUTs or high power DC equipment. Testing EUTs with current up to 200 A and voltage up to 1500 V DC is now easier and safer than ever. CDN models have following characteristics:
- standard burst (IEC61000-4-4) & surge (IEC61000-4-5) capability, and optional ring wave (IEC61000-4-12) capability
- standard 3 phase 690 V AC voltage and 500 V DC, and optional voltage upgrades up to 1000 V DC or 1500 V DC
- different models available for 32 A, 63 A, 125 A or 200 A per phase or DC with the optional full-range option that allows full-compliance tests from 0 A up to selected CDN current.
The CDNs are delivered as standard with adapter for EFT calibration, as well as EUT and supply connectors that match CDN input. Furthermore, a broad range of options for testing EVs and charging station is available:
- EUT overcurrent automatic protections for both AC and DC applications
- Diode-resistor networks for all mentioned current ranges as per IEC61000-4-5 Amd. 1/2017. Such circuits prevent possible overvoltage due to resonance between power supply/charging station and decoupling part of a CDN
- ANSI coupling for both surge and ring wave.
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