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December 2014

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Power and Energy Systems Seminar

Date: 2/10/2014
Time: 4:00 pm - 5:00 pm
Location: Room 50, Everitt Lab
Event Type: Seminars
  ECE ILLINOIS graduate student Tutku Buyukdegirmenci and fellow Josiah McClurg will give the ECE 590 I Power and Energy Systems Seminar from 4-5 p.m. Monday, February 10, in 50 Everitt Lab. Buyukdegirmenci will present "Inverter Characterization for Intermittent and Peak Duty Motor Drives." Inverters have enabled the electrification of aggressive peak-duty applications such as aircraft landing gears, automotive traction, or electromagnetic launchers. These applications draw momentary peak power intermittently and induce significant thermal stresses on the drive train. System ratings under such operations depend on the thermal mass within the drive system components. Due to their substantial thermal mass, electric machines have significant time-limited overload capabilities. Inverters have much faster thermal dynamics than electric machines and may not survive severe short-term overloads. This presentation addresses inverter time ratings under peak duty and safe operating conditions, with modest-to-severe overloads and fault duty operations. McClurg will present, "A Series-Stacked Architecture for Highly-Efficiency Data Center Power Delivery." Differential power processing (DPP) is an advanced power distribution technique that has been successfully applied to a variety of high-power, low-voltage applications, which require extremely high energy efficiency. The applicability of DPP to high-power digital loads has been discussed in earlier work, but to-date has lacked a compelling proof-of-concept demonstration in the context of data centers. This presentation discusses an experimental emulation architecture, software considerations for operating a stacked cluster and measurements from an operational server cluster making use of DPP. The analysis of results from this experimental setup indicates upwards of a five times reduction in energy losses over the conventional power distribution architecture.