BAE hybrid bus powertrains, wireless EV charging, hybrid/EV power electronics

Departments - Electric drive

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March 27, 2020

Alexander Dennis Ltd. (ADL) and the Republic of Ireland’s National Transport Authority (NTA) have ordered up to 600 electric power and propulsion systems from BAE Systems for a new fleet of buses in Ireland. The selection includes an initial order for 100 systems.

“The Series-ER system is highly reliable and an important step to full electrification for Ireland,” says Steve Trichka, vice president and general manager of Power & Propulsion Solutions at BAE Systems. “This technology gets Ireland closer to zero-emission operations.”

Hybrid-electric Series-ER-equipped buses will be able to drive in designated low- and zero-emission zones using global positioning software to ensure full electric mode in these zones. Series-ER technology powers more than 200 buses across the globe, including Boston, Massachusetts, and San Francisco, California.

BAE Systems https://gettozero.com

Wireless EV charging/parking

Wireless charging technology developer Momentum Dynamics Corp. and CEVT, subsidiary of Zhejiang Geely (owner of Volvo and Lotus cars), have autonomously parked a passenger electric vehicle (EV) to charge its battery. The car moved to a space with wireless charging capabilities, carefully positioning itself over the charge pad to maximize power transfer.

The demonstration car charged at 40kW, and the system is scalable to 65kW. Eliminating plugs and attendants could enable autonomous vehicles (AVs) that could charge themselves while not being driven without requiring human or robotic hands to plug in chargers.

“Automatic wireless charging is the inevitable future of EV charging. No other system can match the efficiency, cost effectiveness, and convenience,” says Momentum Dynamics CEO Andrew Daga.

CEVT https://www.cevt.se

Momentum Dynamics Corp. https://momentumdynamics.com

Digital isolator

The ISO7741E-Q1 digital isolator is qualified to the Grade 0 ambient operating temperature specification of the Automotive Electronics Council (AEC)-Q100 standard. The isolater features 1.5kV root-mean square (RMS) working voltage and supports temperatures up to the Grade 0 maximum of 150°C. The isolator better protects low-voltage circuitry from high-voltage events in hybrid electric vehicle (HEV) and electric vehicle (EV) systems, eliminating the need for cooling systems to reduce temperatures to less than 125°C – the maximum temperature Grade 1-qualified integrated circuits (ICs) can support.

When implementing controller area network flexible data rate (CAN FD) communications, engineers can increase in-vehicle network (IVN) signal protection and reach by using the ISO7741E-Q1 with the TCAN1044EV-Q1 Grade 0 CAN FD transceiver.

Grade 0-qualified ICs meet AEC-Q100's -40°C to 150°C temperature range and simplify HEV/EV system designs for harsh environments, such as 48V HEVs where the co-existence of internal combustion engines and battery systems can heat the air around ICs to more than 125°C.

Texas Instruments http://www.ti.com