• • • ELECTRICAL EQUIPMENT• • •
production processes. This is particularly important in modern industrial systems where computerised and digital control and monitoring systems are more susceptible to EMI than previous generations of control equipment. Wireless systems or radio-frequency identification (RFID) tags are especially sensitive to EMI. Although EMC standards for industry are not as high as those set for consumer electronics, the growing use of digital communications in industrial facilities has highlighted the need for filters used in industrial settings to meet the requirements of the IEC standard for audio/video, information and communication technology equipment. Filters for industrial automation need to be robust, offer high-performance, function at high voltages and remain operational at high temperatures.
charging infrastructure is developed will the EV market truly take off.
Drivers will want these charging stations to charge their vehicles rapidly while also delivering enough power to provide maximum range between charges. Current EVCSs provide a single phase or three phase supply with a mains voltage at 230V or 400V.
The extremely high energy levels in rapid- charging EV systems demands EMC/EMI products and solutions that can protect power electronics, onboard chargers, batteries and keyless authentication systems of the EV, as well as the power grid.
Standards such as IEC/EN 61851-23 for EV conductive charging systems and the UL 2202 standard for EV charging system equipment have been introduced to protect users, the EV and the power grid.
Finding a filter that also satisfies the safety standards essential to ensure EMC compliant currents can significantly reduce development time for companies developing EVCSs - a filter capable of effectively ‘cleaning’ the power that feeds into the car ensures a safe charging experience with industry-specific charging voltages up to 1000 VDC.
The growth in automation Industry is increasingly relying on automation to achieve a number of business goals, including the ability to meet the demand for customised products, much greater energy and cost efficiencies, more flexible production, higher quality and to mitigate the skilled labour shortages faced by many industries. In turn, automation requires a reliable source of energy in order to minimise disruptions to
By using mains input filters for all three phases and the neutral line, the immunity of an entire installation can be boosted. Although space constraints for filters in industrial settings remain a challenge, there are compact solutions that deliver excellent saturation resistance and can give good attenuation performance from 150 kHz to 30 MHz.
These challenges are made easier through using expert advice. While trends such as increased use of automated systems, wider adoption of e-mobility through electric vehicles or the ambition of society to make use of more renewable energy are welcome developments, electromagnetic interference will always be present. As such, it will need to be dealt with if these technologies are to fulfil their promise while also providing maximum efficiency and safety.
It’s vital to be on top of these technological advances, and even ahead of them, if the innovation promised in these sectors is to come to fruition.
electricalengineeringmagazine.co.uk
ELECTRICAL ENGINEERING • FEBRUARY 2023 47
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