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Managing high-voltage line ripple rejection using high-bandwidth DC‑DC converters

Inverter switching can cause high voltage/current ripple of significant magnitude on the HV bus with frequency up to 20kHz. This ripple puts demanding requirement on main DC-DC converter that supplies the 12V bus. Special concern is on design of EMI filter, whose main task is to attenuate noise caused by converter. In order to keep converter stable, system reliable and 12V bus quite, EMI filter design can lead to oversized components, too much heat dissipation and even struggle with EMC compliance. Using power modules, leveraging the Vicor Sine Amplitude Converter (SAC™), design of the filter is simplified and 12V bus is kept quiet and reliable, thanks to high bandwidth controller that manages the voltage ripple caused by inverter switching.

Haris Muhedinovic

Automotive Principal Field Applications Engineer

Haris Muhedinovic works with OEMs and TIERs to design and develop highest performance power solutions for most demanding automotive applications. With his interest in power electronics and electronics systems, Haris is aware of new technologies and trends in industry, which allows him to implement power solutions to meet the most demanding specifications. Haris received his MSc from the University of Sarajevo and has 7 years of experience in power electronics in design and application engineering.

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Ranya Badawi

Power Converter Engineer, General Motors

Ranya Badawi is a power converter engineer at General Motors where she develops HV power converters for both on-board and off-board vehicle applications. Her interests are in power electronics, converter control and system level integration and stability. Ranya received her MEng from the University of Cincinnati and is currently pursuing her PhD in Electrical and Computer Engineering at Oakland University. She has 6+ years experience in the design and development of high voltage power converters.

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Steven Wybo

Technical Specialist in DC-DC Conversion, General Motors

Steven Wybo is a Technical Specialist in DC-DC Conversion at General Motors. He has 30 years of experience in power electronics, mostly focused on automotive electrification. While at General Motors, Steven has developed and launched automotive DC‑DC for several GM electric vehicles and hybrid vehicles. Prior to joining General Motors, Steven designed  automotive power electronics for Ford/Visteon. Steven earned a BSEE degree from the University of Michigan. He has completed graduate work in power electronics at the University of Colorado-Boulder.

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Originally presented at World Congress Expo on April 18, 2023