scholarly journals Investigation of Torque Performance and Flux Reversal Reduction of a Three-Phase 12/8 Switched Reluctance Motor Based on Winding Arrangement

Energies ◽  
2022 ◽  
Vol 15 (1) ◽  
pp. 284
Author(s):  
Ruchao Pupadubsin ◽  
Seubsuang Kachapornkul ◽  
Prapon Jitkreeyarn ◽  
Pakasit Somsiri ◽  
Kanokvate Tungpimolrut
Keyword(s):  
Magnetic Flux ◽  
Core Loss ◽  
Weight Ratio ◽  
Switched Reluctance Motor ◽  
Maximum Efficiency ◽  
Stator Core ◽  
Switched Reluctance ◽  
Three Phase ◽  
Reluctance Motor ◽  
Flux Path

The goal of this paper is to present a comparative analysis of two types of winding arrangements for a three-phase 12/8 switched reluctance motor (SRM), where short- and fully-pitched winding arrangements under unipolar operation are considered. From the analytical results, the short-pitched winding has the best torque per copper weight ratio. The core loss based on counting the number of flux reversals in the stator yoke for each winding arrangement is also proposed and mentioned. To reduce the magnetic flux reversals in the stator core, changing the direction of the magnetic flux path by modifying the winding polarities of the short-pitched winding could reduce 10–13% of core loss compared to the conventional winding. A 1 kW, 12/8 SRM prototype for the ventilation fan application is constructed and tested in order to verify the design consideration of winding configuration. At the rated condition, a maximum efficiency around 82.5% could be achieved.

scholarly journals Investigating the Magnetic Characteristics of 12/8 Switched Reluctance Motor for Enhanced Starting Torque

2021 ◽  
Vol 18 (1) ◽  
pp. 70-75
Author(s):  
E.C. Abunike ◽  
G.D. Umoh ◽  
I.E. Nkan ◽  
O.I. Okoro
Keyword(s):  
Magnetic Flux ◽  
Switched Reluctance Motor ◽  
Maximum Efficiency ◽  
Magnetic Characteristics ◽  
Field Energy ◽  
Switched Reluctance ◽  
Flux Lines ◽  
Magnetic Flux Lines ◽  
Reluctance Motor ◽  
Starting Torque

The switched reluctance motor (SRM) is among the special purpose electric machine family. It is simple in construction and avoids use of magnet so it is cheap to manufacture. The magnetic characteristics and simulation of three phase 12/8 switched reluctance motor (SRM) for enhanced starting torque is presented. The motor was analyzed using finite element technique (FET) and it was improved by focusing on the impact of important geometrical parameters on torque and efficiency. From the simulated results, the motor attained maximum efficiency of 91.7% at a speed of 1648.6 rpm and recorded a maximum torque of 321.1 Nm at a speed of 34.4 rpm. The magnetic flux lines and densities were also recorded. The maximum and minimum magnetic flux lines of the motor as observed were 1.2x10-3 Wb/m and -8.5x10-4 Wb/m respectively while the respective values of the maximum and minimum magnetic flux density of the motor were 3.8x10-1 T and 2.11x10-9 T. The results show that most of the field energy is confined within the motor and also concentrated in the air gap region of the motor. Dynamic analysis of the motor was performed for 0.02 s at a damping coefficient of 0.71 μNms/rad. The results showed that the motor has lower torque ripple. The preference to use this type of motor where high speed operation and better starting torque are needed has been highlighted in this study. Keywords:  Switched reluctance motor, static characteristics, transient analysis, torque, magnetic flux

scholarly journals A novel power inverter for switched reluctance motor drives

2005 ◽  
Vol 18 (3) ◽  
pp. 453-465 ◽  
Author(s):  
Zeljko Grbo ◽  
Slobodan Vukosavic ◽  
Emil Levi
Keyword(s):  
Switched Reluctance Motor ◽  
Voltage Source ◽  
Power Electronic ◽  
Switched Reluctance ◽  
Three Phase ◽  
Reluctance Motor ◽  
Converter Topology ◽  
Dc Bus ◽  
Bus Voltage ◽  
Power Electronic Converter

Although apparently simpler, the SRM drives are nowadays more expensive than their conventional AC drive counterparts. This is to a great extent caused by the lack of a standardised power electronic converter for SRM drives, which would be available on the market as a single module. A number of attempts were therefore made in recent times to develop novel power electronic converter structures for SRM drives, based on the utilization of a three-phase voltage source inverter (VSI), which is readily available as a single module. This paper follows this line of thought and presents a novel power electronic converter topology for SRM drives, which is entirely based on utilization of standard inverter legs. One of its most important feature is that both magnetizing and demagnetizing voltage may reach the DC-bus voltage level while being contemporarily applied during the conduction overlap in the SRM adjacent phases. At the same time, the voltage stress across the power switches equals the DC-bus voltage. The topology is functional in all operating regimes of the drive. Principle of operation is explained in detail for a three-phase SRM drive and experimental results obtained with a 6/4 switched reluctance motor, are included. Four inverter legs are required in this case. Some considerations, justifying the proposed converter topology from the point of view of the cost, are included.

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