ELECTRONICS TESTING: AUTOMOTIVE
modules. It also provides for enhanced management of design databases containing complex multi-technology structures enabling correct simulation set- up and traceability of designs and simulation data. Python and Microsoft Visual Studio scripting, debugging, automation, processing, utilisation and visualisation of complex simulation and measurement data is included, providing the integration and insights needed to achieve optimal designs that meet multiple performance specifications.
MULTI-PHYSICS SIMULATION TECHNOLOGIES Error vector magnitude (EVM) distortion specification is the new requirement when designing for digitally modulated signals in RF and microwave applications. PathWave ADS incorporates Keysight
instrumentation algorithms for compact test signal generation and rapid EVM distortion calculations to deliver EVM simulation support for any modulated signals at the circuit level, enabling design tuning and optimisation. Multi-physics simulation enhancements enable designers to accurately identify transient temperature rises to create reliable high-power RF components when deployed in the field to avoid costly premature failures.
It also enables designers to ensure power
amplifier stability under all operating conditions. When used with RFPro EM visualisation, designers can identify the physical locations and frequencies at which instability occurs to fix them before building hardware.
Designers can also compress what would normally require five days on a single machine into one day with cloud-based high-performance computing to perform thorough simulation and optimisation that results in higher yield and reduced time to market.
According to Dr Xu Zhu, director of technology at Menlo Micro, PathWave ADS and RFPro provides an end-to-end design and simulation solution for MEMS module workflows. “We rely on the PathWave ADS workflow to automate the development of our MEMS products from device wafer level to module integration with other components, as well as PCB design including MEMS device or module plus RF connectors. SmartMount makes integration of different technologies, such as flip-chip or wire bond, onto the module substrate and the PCB board as simple as stacking LEGO blocks,” says Zhu. T&TH
Conversion technology gives power on demand
DC-DC converters for diesel-powered commercial vehicles can power accessories such as antilock brakes and lighting
P
ower management company Eaton has introduced a family of 48-volt DC-DC converters for diesel- powered commercial vehicles that can be used to power accessories such as antilock brakes and lighting. Unlike other similar converters, Eaton’s are operational in ambient temperatures up to 85˚C and boast 97 per cent design efficiency. Commercial vehicles are increasingly moving to 48-volt architectures for reasons including the potential for the mild hybridisation of drive systems. Additionally, the higher power systems can be used to quickly heat a vehicle’s after-treatment catalyst to help reduce emissions. According to Ben Karrer, director of technology development at Eaton’s eMobility business, DC-DC converters are an essential part of the company’s product portfolio, being used in a variety of vehicle applications. Many manufacturers are moving to 48V architecture as the ability to efficiently convert power from high to low voltage is becoming critical.
specific duty cycles using its advanced digital control architecture, enabling flexible control modes through firmware adaptation. The converter can be used for light delivery vehicles, utility vehicles or heavier transport applications.
HIGH POWER CONNECTIVITY The DC-DC converter also features high- power lock box (HPLB) power connectors. These are designed by manufacturer of high-precision electrical connectivity components Royal Power Solutions, which was acquired by Eaton earlier this year. The DC-DC power converter’s HPLB terminals provide superior efficiency and reliability as well as protection against the elements, so the system can withstand the harsh environmental conditions
❱❱ The 48V DC-DC converter withstands the harsh environment of commercial vehicle applications
VOLTAGE REDUCTION Eaton’s DC-DC converter takes power from a 48V system and reduces it to 24V. This is then further reduced to 12V for use in low- voltage systems and charges a 12V battery, should a fault occur in the main supply. Eaton’s family of DC-DC converters adhere to Automotive Safety Integrity Level B functional requirements and can be optimised to work seamlessly with a manufacturer’s alternator specifications. Recognising the wide variety of diesel- powered commercial vehicles operating today, the converters can also be tuned to
encountered in commercial vehicle applications. Plus, the HPLB terminals are waterproof up to 1m and strong enough to withstand high-pressure water spray. Eaton’s DC-DC converter
includes noise reduction and rejection technologies, so it is unaffected by and does not interfere with vehicle electronics. And unlike some similar available technologies, the design efficiency of Eaton’s air-cooled DC-DC converters, which features heat-sink fins, reduces power loss over a wide operating range. Karrer explains that the converter is
rugged and robust, sealed against environmental factors such as salt spray and water and has high vibration resilience. “This unit is the ideal product for manufacturers that require a dependable method to manage the higher power loads found in modern commercial vehicles.” T&TH
October 2022 /// Testing & Test Houses /// 29
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