Machine Design Considerations for the Future Energy Challenge

Motors consume a significant fraction of electricity in the United States and in the world. As part of the International Future Energy Challenge, student teams are endeavoring to improve the efficiency of fractional-horsepower machines. The present work summarizes the motor design and construction process for a 500 W prototype induction machine targeting efficiency above 80%. Analytical and finite-element results are shown

Manipulating the alpha level cannot cure significance testing

We argue that making accept/reject decisions on scientific hypotheses, including a recent call for changing the canonical alpha level from p = 0.05 to p = 0.005, is deleterious for the finding of new discoveries and the progress of science. Given that blanket and variable alpha levels both are problematic, it is sensible to dispense with significance testing altogether. There are alternatives that address study design and sample size much more directly than significance testing does; but none of the statistical tools should be taken as the new magic method giving clear-cut mechanical answers. Inference should not be based on single studies at all, but on cumulative evidence from multiple independent studies. When evaluating the strength of the evidence, we should consider, for example, auxiliary assumptions, the strength of the experimental design, and implications for applications. To boil all this down to a binary decision based on a p-value threshold of 0.05, 0.01, 0.005, or anything else, is not acceptable

Rotor slot geometries for snall inverter dedicated induction machines.

Printout.Thesis (M.S.)--University of Illinois at Urbana-Champaign, 2003.Includes bibliographical references (leaves 139-141)U of I OnlyUIUC only access ETD

Induction Machine Performance Improvements: Design-Oriented Approaches

136 p.Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2007.Finally, an induction machine model featuring a variable permeance element mesh is introduced. Results for a 500 W motor are compared to measurements, analytical models, and FEA. This machine has limited nominal torque capabilities due to saturated stator and rotor teeth, discovered neither by the design software (analytically based) nor FEA. The 3-D MEC model, about a magnitude smaller in complexity and size than the FEA model, more accurately estimates the limited torque. All the results indicate that MEC, corrected for local saturation, is a promising option for a design tool.U of I OnlyRestricted to the U of I community idenfinitely during batch ingest of legacy ETD

Vehicle system and subsystem interactions with power electronics.

Includes bibliographical references

One Core Preservation System for All your Data. No Exceptions!

In this paper, we describe an OAIS aligned data model and architectural design that enables us to archive digital information with a single core preservation workflow. The data model allows for normalization of metadata from widely varied domains to ingest and manage the submitted information utilizing only one generalized toolchain and be able to create access platforms that are tailored to designated data consumer communities. The design of the preservation system is not dependent on its components to continue to exist over its lifetime, as we anticipate changes both of technology and environment. The initial implementation depends mainly on the open-source tools Archivematica, Fedora/Islandora, and iRODS

Modular inverter for advanced control applications.

Includes bibliographical references