Hydraulic models of sewer systems are commonly used to predict the risk of urban looding. However, suitable calibration datasets in lood conditions are scarce. The quantiication of energy losses within manhole structures is a current source of uncertainty within such models. To address this gap, a scaled physical manhole model is used to quantify hydraulic energy losses during surcharging and n...

Permanent magnet (PM) machines with tooth coil windings are designed and analyzed. We study how the slot wedge material affects the behavior of PM losses when using tooth coil windings, which generate a significant air gap flux density harmonic content. The losses and cogging torques of a surface permanent magnet rotor and an interior permanent magnet rotor are compared in no-load and load situ...

The present-day and potential benefits of highly integrated miniaturized applications like wireless micro-sensors and biomedical implants in military, space, medical, and commercial markets fuel the demand for self-sustaining micro-electronic systems. Extending operational life to practical levels in such volume-constrained environments is difficult because space limits energy and power. Althou...

We study the use of topology optimization in design low-loss ferromagnetic core structures for additively manufactured electrical machines. The test case was a simple toroid with primary and secondary winding. A 2D axisymmetric finite element method model implemented toroid, optimized minimum losses maximum flux linkage. then modified additive manufacturing, samples were built via laser powder ...

This paper presents an analytical modeling method of optimal control variables to maximize output power for switched reluctance generators (SRGs) in single pulse mode operation. This method extends the basic theory of the Stiebler model and utilizes the flux linkage function to express the inductance model of SRG. In this paper, the optimal phase current shape of SRG for maximum output power is...