Optimization of a High-Speed Synchronous Reluctance Machine's Rotor Topology

Abstract

Currently, due to the growing use of renewable energy technologies and hydrogen energy technologies, highspeed electric machines are of particular interest. High-speed electric machines have proven themselves well in compressor units and can improve the overall efficiency of the entire unit by eliminating the gearbox. However, the design and operation of these electric machines are accompanied by several difficulties, such as the resulting increased centrifugal forces, leading to increased mechanical stresses in the structure of the rotor. In this paper, a high-speed synchronous reluctance motor is considered as the object under study. The aim is to investigate the possibility of reducing mechanical stresses in the rotor steel by optimizing its topology while maintaining the output electromagnetic power.

Carbon Fiber Homogenization for Modelling Sleeve of High-Speed Electrical Machines

“…A bolted connection at high speeds (above 20,000 rpm) shows its complete inoperability, as it creates excessive mechanical stresses at the point of contact. A carbon fiber sleeve would better solve the rotor assembly problem, but modelling carbon fib research object is an electric machine with an axially laminated rotor, a rotation speed of 31500 rpm, and dimensions indicated in [1] and er as a composite material can be tricky. In particular, on the websites of carbon fiber manufacturers, you can find the values of Young's modulus and tensile strength only for a unidirectional sheet of carbon filaments of a certain thickness.…”

“…The research object is an electric machine with an axially laminated rotor, a rotation speed of 31500 rpm, and dimensions indicated in [1] and Table 1. Thus, this article aims to study the application of a carbon fiber sleeve as an assembly element of an axially laminated rotor of a synchronous reluctance machine.…”