Optimal split ratio for high speed induction machines

Abstract

The split ratio of several types of electrical machines has been identified as an important optimisation parameter. While the optimisation of split ratio in high-speed permanent magnet, switched reluctance and flux-switching machines has been researched, this parameter has often been neglected in the design of high-speed induction machines. In this paper, using a described multi-domain design environment which puts equal weight on the electromagnetic, mechanical and thermal aspects, the rotor split ratio together with the rotor slot shape and electric and magnetic loadings are identified as important and sensitive parameters in the design of high speed, high power density laminated-rotor induction machines. This is shown using a design case study which involves improving the power density of an existing 10kW, 75kpm laminated rotor induction machine.

Multidisciplinary Design Automation of Electric Motors—Systematic Literature Review and Methodological Framework

“…The term in-the-loop MDA, however, pertains to process frameworks that assess designs across multiple engineering domains for each design variant. This approach empowers engineers to make design choices by considering properties from multiple domains and facilitates more frequent iterations, thereby facilitating the identification of optimal designs within the solution space [6,7]. The review papers were analyzed regarding the following engineering domains considered in the in-the-loop MDA: electromagnetic, thermal, mechanic, manufacturing and economic domains.…”

“…This often results in lengthy iteration cycles, increased project risks and prevents the inclusion of aspects from different domains in decision making. Various authors claim this to be a key factor for future electric motor development to meet rising efficiency standards [6][7][8][9]. For this reason, new design methods are suggested in the literature, which will be summarized under the term multidisciplinary design automation (MDDA) in this work.…”

Development of rotor flux control laws for high-speed asynchronous electric drive

“…Применение электродвигателей с повышенной частотой вращения является наиболее эффективным способом улучшения удельных мощностных показателей электроприводов (ЭП). Стремление облегчить и удешевить промышленное изделие за счёт повышения оборотов электрической машины [1] характерно для широкого спектра промышленных применений: электроприводы металлорежущих станков [2], маховиковые накопители энергии [3], турбокомпрессорные агрегаты [4] и т.д. Сравнительно высокой механической прочностью ротора, необходимой для работы при больших угловых скоростях, обладает асинхронная машина (АМ) с так называемым массивным ротором [5].…”