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The purpose of this paper is to study the design opportunities in high-speed toothless toroidal winding surface permanent magnet machine enabled by the implementation of silicon carbide-based power electronic inverters. High-speed machines designed with toothless toroidal winding configuration are beneficial to eliminating the cogging torque due to the absence of stator teeth, but the airgap flux...
Mechanical design of the rotor is an important part of the design process for high-speed electric machines. This paper proposes an analytical method for finding an approximate rotor length and diameter for a surface permanent magnet machine rotor early in the design process. Specifically, the method can be used to find approximate rotor length and diameter dimensions that will balance the need for...
High-speed electric machines are becoming increasingly important and utilized in many applications. This paper addresses the considerations and challenges of the rotor design of high-speed surface permanent magnet machines. The paper focuses particularly on mechanical aspects of the design. Special attention is given to the rotor sleeve design including thickness and material. Permanent magnet design...
The purpose of this paper is to investigate high-speed machine design enabled through the use of silicon-carbide based power electronic inverters. Silicon carbide based switching devices have superior properties compared to silicon based devices, and they are able to change the paradigm for high-speed machine design. High-speed machines with a higher number of poles are shown to reduce the machine...
Due to their inherent high power density, high-speed multi-megawatt electric machines are becoming increasingly more popular in many applications including industrial, petro-chemical, mining, and marine. In this paper, state-of-the-art high-speed multi-megawatt electric machines are reviewed. The power range, speed range, and specific power of different high-speed multi-megawatt electric machine topologies,...
The purpose of this paper is to introduce a novel dual-stator six stator slots four rotor poles flux switching permanent magnet machine that is viable for operation. The conventional six slots four poles topology suffers from asymmetrical flux linkage and severely unbalanced back-EMF, which makes it unfeasible. The proposed dual-stator structure utilizes windings in the second stator to produce a...
Silicon carbide (SiC) based power switching devices have been extensively studied by researchers and engineers in recent years because of their superior physical properties compared to silicon. However, the benefits of using SiC devices have yet to be fully explored, especially for high-speed or high-fundamental frequency motor drive applications. Hence, this paper contributes to the understanding...
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