Abstract
High-speed permanent magnet synchronous machines (PMSMs) have attracted much attention due to their high power density, high efficiency, and compact size for direct-drive applications. However, the consequent power loss density is high, and hence heat dissipation is a major technical challenge. This is particularly the case for high-speed operation. In this paper, a MW level high-speed PMSM is designed and its electromagnetic and mechanical power losses comprehensively investigated using finite element analysis. The transient machine demagnetization performance is studied, and a composite rotor structure is proposed to improve machine antidemagnetization capability. The temperature distribution of the proposed high-speed PMSM is also analyzed using a fluid-thermal coupling method with calculated power loss. Experiments conducted on a prototype of the high-speed PMSM demonstrate the effectiveness of the numerical models developed and validate the results obtained.
Highlights
HIGH speed permanent magnet synchronous machines (PMSMs) are increasingly popular owing to their excellent performance in industrial applications such as gas compressors, distributed power generation, electrical turbocharging, turbines and flywheel energy storage system [1]-[3]
Rotor eddy current loss is critical in high speed PMSMs as it can only be removed through the air gap
As the stator slot number has a critical impact on the machine magnetic field harmonics, a multi-slot stator structure is preferred for high speed PMSM design to reduce rotor eddy current loss effectively
Summary
HIGH speed permanent magnet synchronous machines (PMSMs) are increasingly popular owing to their excellent performance in industrial applications such as gas compressors, distributed power generation, electrical turbocharging, turbines and flywheel energy storage system [1]-[3]. These machines can be characterized by their high power density, compact size, high reliability and their suitability for direct-drive applications without gearboxes. The machine stator structure and rotor sleeve are investigated and studied using FEM to decrease rotor eddy current loss. The temperature distribution for the high speed machine is evaluated based on power loss and fluid-thermal coupling analysis. The high speed PMSM is prototyped and experimentally tested for validation purposes
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
