The common mode (CM) voltage generated by a switching power converter yields unwanted currents to circulate in the ground paths, tripping ground faults relays, accelerating motor bearing aging, and producing electromagnetic interference (EMI). Typical differential mode (DM) models of power converters do not account for CM paths and currents, so models including parasitic components and CM voltages must be used to predict CM EMI. In this presentation CM modeling and analysis will be highlighted and popular CM EMI mitigation methods, including passive filters, active filters, and novel power converter topologies will be briefly summarized. The second part of the presentation will focus on novel CM voltage elimination methods based on a game-changing shift from pulse width modulation (PWM) to pulse density modulation (PDM) for grid-forming and grid-following inverters. Rapid prototyping of three-phase four-leg inverters, built with wide bandgap devices (WBG), will also be presented to demonstrate the elimination of the CM voltage at the switching frequency and significantly reducing the size of the CM passive filters required to meet the conducted emission limits in MIL-STD-461G. Speaker(s): Dr. Giovanna Oriti, Virtual: https://events.vtools.ieee.org/m/329518

Sponsored by the (https://vtsociety.org/chapter/santa-clara-valley-joint-section-chapter) (https://us02web.zoom.us/webinar/register/WN_D7J6sY6pRzusWcCWp7EbyA) When: Dec 8, 2022 06:00 -7.00 PM Pacific Time (US and Canada) The IEEE P2851 standardization initiative was started to define a dependability lifecycle as well as methods and formats for exchange/interoperability of data across all steps of the lifecycle in a consistent way. Additionally, the work products of this standardization initiative will help enable interoperability between tools. The goal of this work is to provide structures and directions to allow a seamless exchange of information and interoperability between activities at the same or different level of abstraction, as well as activities across lifecycles related to different dependability attributes across application domains such as automotive, industrial, medical and avionics safety critical systems. Co-sponsored by: Buenaventura Section Chapter Speaker(s): Jyotika Athavale, Virtual: https://events.vtools.ieee.org/m/335845

Sponsored by the (https://vtsociety.org/chapter/santa-clara-valley-joint-section-chapter) (https://us02web.zoom.us/webinar/register/WN_D7J6sY6pRzusWcCWp7EbyA) When: Dec 8, 2022 06:00 -7.00 PM Pacific Time (US and Canada) The IEEE P2851 standardization initiative was started to define a dependability lifecycle as well as methods and formats for exchange/interoperability of data across all steps of the lifecycle in a consistent way. Additionally, the work products of this standardization initiative will help enable interoperability between tools. The goal of this work is to provide structures and directions to allow a seamless exchange of information and interoperability between activities at the same or different level of abstraction, as well as activities across lifecycles related to different dependability attributes across application domains such as automotive, industrial, medical and avionics safety critical systems. Co-sponsored by: Buenaventura Section Chapter Speaker(s): Jyotika Athavale, Virtual: https://events.vtools.ieee.org/m/335845