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Principle of Operation of the Switched Reluctance Motor
Published in R. Krishnan, Switched Reluctance Motor Drives, 2017
The rotor is aligned whenever diametrically opposite stator poles are excited. In a magnetic circuit, the rotating member prefers to come to the minimum reluctance position at the instance of excitation. While two rotor poles are aligned to the two stator poles, another set of rotor poles is out of alignment with respect to a different set of stator poles. Then, this set of stator poles is excited to bring the rotor poles into alignment. Likewise, by sequentially switching the currents into the stator windings, the rotor is rotated. The movement of the rotor, hence the production of torque and power, involves switching of currents into stator windings when there is a variation of reluctance; therefore, this variable speed motor drive is referred to as a switched reluctance motor drive.
Electric Motors
Published in Ranjan Vepa, Electric Aircraft Dynamics, 2020
The switched reluctance motor produces torque using a different mechanism from the motors previously described. The rotor has saliency and interspersed regions of high and low reluctance. In this case, control is provided by an uncommon form of power converter, known as an asymmetric half-bridge converter. The switched reluctance motor is a particular type of synchronous machine that has the wound field coils of a DC motor for its stator windings and has no coils or magnets on its rotor. In this machine, both the stator and rotor have salient poles. Hence, the machine is a doubly salient machine. One of the applications of a switched reluctance motor is in the construction of a stepper motor. Further details about stepper motors may be found in Athani [8].
Electric Machines
Published in Iqbal Husain, Electric and Hybrid Vehicles, 2021
Another candidate for traction motors is the switched reluctance (SR) motors. These motors have excellent fault tolerance characteristics and their construction is fairly simple. The SR motors have no windings, magnets or cages on the rotor, which helps increase the torque/inertia ratio and allows higher rotor operating temperature. The constant power speed range is the widest possible in SR motors compared to other technologies, which makes it ideally suitable for traction applications. The two problems associated with switched reluctance motors are acoustic noise and torque ripple. There are well-developed techniques to address both; moreover, for several traction applications noise and torque ripple is not a big concern.
SR Motor T-I Characteristics Performance Simulation Validation through Experimental Results
Published in Cybernetics and Systems, 2023
Switched reluctance motor (SRM) has a simple construction, high fault tolerance capability, high reliability, and low cost because, SRM do not have permanent magnet or winding on rotor and work on the principle of reluctance. SRM with different pole configurations are 8/6, 6/4, and 12/8 available. It is applicable for various industry applications (Vijayakumar et al. 2008; Sasmal and Mula 2015; Thakare and Patil 2019; Wei et al. 2021). Modeling, simulation analysis of 6/4 SRM is presented in MATLAB SIMULINK environment (Schulz and Rahman 2003). Digital proportional integral (PI) current regulators applicable for nonlinear SRM control. This control is suitable for EV applications (Sun et al. 2020). Author described new driving method for SRM using standard full bridge inverter, ripple in torque and speed are reduced (Pahariya, Saxena, and Singh 2005). Author proposed a new concept of SRM variable speed drive for different applications (Yu et al. 2019). Two step commutation methods are combined with pulse width modulation for noise reduction. Method to determine turn on angle, turn off angle is also suggested (Panda and Ramanarayanan 2007). Author analyzed effect of mutual coupling on SRM drive, verified results through simulation and experimentation, by considering even and odd number of phases (Pahariya, Saxena, and Singh 2014). Author presented various applications of SRM drive and necessary control methods along with torque speed characteristics (Saxena, Singh, and Pahariya 2010).
Modelling and simulation of dual sourced front-end converter for hybrid electric vehicles
Published in International Journal of Ambient Energy, 2022
A. S. Veerendra, M. R. Mohamed, M. H. Sulaiman, K. Sudhakar, K. Peddakapu
Without permanent magnets and rotor windings in the rotor circuit, switched reluctance motors have a less difficult and more robust construction. They provide a good working response and a more reliable option for motor driving compared to permanent magnet synchronous motors (Chiba et al. 2015). In addition to additional benefits like increased efficiency, high starting torque and high consistency, good fault tolerance, SRMs are considered a good motor drive for electric vehicles or hybrid electric vehicle applications. In order to increase the consistency of the SRM system, fault tolerance schemes and position sensing control methods are introduced for some applications. To reduce the torque fluctuations of the switched reluctance motors, innovative direct torque control schemes were planned to address this issue (Kiyota, Kakishima, and Chiba 2014). In addition, some innovative technologies are projected to increase machine efficiency and reduce vehicle vibration. Until now, there has been no development of integrated converter topology with SRM for hybrid electric vehicle applications (Ye, Bilgin, and Emadi 2015a).
Performance investigation on ANFIS and FFNN assisted direct and indirect PV-fed switched reluctance motor water pumping system
Published in International Journal of Modelling and Simulation, 2022
Vijay Babu Koreboina, Narasimharaju B L, Vinod Kumar D M
Water resources play a major role in various sectors like agriculture, domestic needs, etc. Likewise, economic growth mainly depends on the agriculture sector. Most of the off-grid rural areas need portable alternative clean energy to drive the water pumps. Extending the grid to those remote areas would be capital-intensive and also inefficient due to transmission and distribution losses. In addition, carbon emission and thermal fuel extinction call for clean alternative energy sources (AES) such as biomass, solar, wind, and hybrid. At present, these resources contribute to electricity generation by about 19% [1]. Therefore, small-scale AES are an ideal choice to reduce the burden on the grid, and to produce clean energy for water pumping systems. In the present scenario, conventional electrical motors (induction motors, synchronous motors, permanent magnet synchronous motors, and permanent magnet DC motors) are employed for PV-fed water pumping and household power generation. Switched reluctance motor (SRM) is an alternative candidate which is promising, cost-effective, and highly efficient in contrast to the conventional motors for small-scale applications. With its wider advantages, SRM has emerged in research importance for variable speed drive applications. With the absence of carbon brushes, slip rings, commutators, and cage bars, SRM has emerged in its suitability for wide applications such as hand fork, train air conditioner, and aerospace [2].