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 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 Influence of Control and Structure Parameters on the Starting Performance of a 12/8 Pole Switched Reluctance Motor

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3744
Author(s):  
Jichao Han ◽  
Baojun Ge ◽  
Kai Zhang ◽  
Yang Wang ◽  
Chao Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Switched Reluctance Motor ◽  
Structure Parameters ◽  
Two Phase ◽  
Switched Reluctance ◽  
Reluctance Motor ◽  
Calculation Results ◽  
Starting Torque ◽  
Element Method

To investigate the influence of control and structure parameters on the starting performance of a switched reluctance motor, a 12/8 pole switched reluctance motor is analyzed in this paper. The novel field-circuit coupled finite element method of switched reluctance motor is proposed in the paper. The influence of the controller on the switched reluctance motor is considered. The influence of rotor initial position angle, starting mode, starting current, and structure parameters on the starting performance of the switched reluctance motor is studied using the field-circuit coupled finite element method. The starting performance of the switched reluctance motor is obtained under the different control and structure parameters. The alternating starting mode of single- and two-phase winding can improve the starting torque of switched reluctance motor (SRM). As the stator pole arc coefficient increases, the starting torque of SRM increases. The appropriate reduction of the air gap length can improve the starting torque of SRM. Experimental results of the prototype are compared with the calculation results, which verifies the reliability of the calculation method and accuracy of the calculation results.

scholarly journals Torque ripple and noise control of switched reluctance motor using an adaptive fuzzy PI control with the aid of AR algorithm

2021 ◽  
Vol 12 (2) ◽  
pp. 1239
Author(s):  
Rekha P S ◽  
Vijayakumar T.
Keyword(s):  
Magnetic Force ◽  
Noise Control ◽  
Acoustic Noise ◽  
Switched Reluctance Motor ◽  
Torque Ripple ◽  
Maximum Efficiency ◽  
Switched Reluctance ◽  
Reluctance Motor ◽  
Radial Magnetic Force ◽  
Ripple Control

In recent days switched reluctance motor is widely used for numerous industrial applications due to its simple structure, minimum cost and maximum efficiency. Regardless of numerous exclusive benefits of the switched reluctance motor (SRM), acoustic noise of this motor is high and it is important to accomplish more analysis on the noise lessening, which is the primary goal of this paper. The major causes of acoustic noise in a SRM are torque ripple and radial magnetic force. Since radial magnetic force is highly influential by the design of motor, torque ripple control is analysed in this article for acoustic noise control. Torque ripple control of SRM is proposed using optimization in direct torque control (DTC) method. Nowadays, optimisation plays a crucial role in motor drives for enhanced control. In this paper, artificial raindrop algorithm is proposed in DTC of SRM to minimise torque ripple. Performance of proposed ARA based DTC of four-phase 8/6 SRM is analysed using Matlab and compared with the performance of fuzzy gain scheduling PI controller based DTC.

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