Performance Analysis of Axial-Flux Induction Motor with Skewed Rotor

Abstract

In recent years, with developing technology in the field of electrical machines, more efficient and high power density electric motors have been produced. The use of high energy efficiency motors gains importance due to the increase in global energy demand. The main purpose of this study was to design an Axial Flux Induction Motor (AFIM) with the same efficiency class as the Radial Flux Induction Motor (RFIM) in premium efficiency (IE3) class which is used commonly in industrial applications. Various AFIMs are designed with different rotor slot numbers and performance analyses as efficiency and torque ripple changes are investigated. It is known that torque ripple is one of the key parameters in electrical machine design which should be kept as low as possible without decreasing efficiency and torque. Accordingly, AFIMs’ rotor slots are skewed considering the stator and rotor slot numbers. The use of a Soft Magnetic Composites (SMC) material in design is also investigated. As a result of the analyses, many premium efficiency classes for AFIMs are obtained. In addition, using SMC material and skewing the rotor slots provides that torque ripples be reduced.

Back EMF Waveform Comparison and Analysis of Two Kinds of Electrical Machines

“…However, compared with the straight slot of the rotor, the skewed slot of the rotor can improve the sinusoidal degree of back EMF waveforms. The detailed theoretical research of skewed-slot-type rotor can be seen in References [22][23][24]. In this section, the discrepancy between the straight-slot-type rotor and skewedslot-type rotor is discussed through simulation and harmonics analysis.…”

“…For the straight-slot-type rotor of the FSPM machine and VFMPM machine, if we divide the mechanical rotating degree  into N equal parts, and simultaneously calculate the straight-slot-type back EMF waveform with different mechanical rotating The detailed theoretical research of skewed-slot-type rotor can be seen in References [22][23][24]. In this section, the discrepancy between the straight-slot-type rotor and skewed-slot-type rotor is discussed through simulation and harmonics analysis.…”

Elektrikli Araçlar için Aynı Stator Gövdesine Sahip Asenkron Motor ile Gömülü Sürekli Mıknatıslı Senkron Motorun Karşılaştırılması ve Performans Analizi

“…In Equation ( 9), torque ripple (τ ripple ) in percent is presented which is defined as the ratio of difference between maximum (τ max ) and minimum torque (τ min ) values to average torque (τ avg ) (Keskin Arabul et al, 2020).…”

Studies on Energy Consumption of Electric Light Commercial Vehicle Powered by In-Wheel Drive Modules

“…Among the designs of electric drive systems, those with electric motors located directly in the wheel are evolving rapidly. The vast majority of these designs use synchronous motors with permanent magnets, such as outrunner radial flux [33][34][35][36][37][38][39][40], axial flux [41][42][43][44][45][46][47][48], reluctance [49,50] or induction [51,52]. There are also constructions that, in order to reduce exhaust emissions generated by heat engines, use drive modules that can be added to an existing internal combustion vehicle by replacing parts of the suspension components [53,54] or the entire axle [55].…”