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RISS 인기검색어
- 검색키워드
- 저자 : Balaji Mahadevan (검색결과 4 건)
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Surianarayanan Mahadevan,Balaji Dhandapani,Senthilkumar Sivaprakasam,Asit Baran Mandal 한국생물공학회 2010 Biotechnology and Bioprocess Engineering Vol.15 No.4
Biocalorimetry has proved to be an efficient tool for studying the energetics involved in several biochemical reactions. In this study, biocalorimetry was employed to simultaneously analyze biokinetics and bioenergetics involved during cultivation of a salt tolerant Pseudomonas aeruginosa for the production of alkaline protease. Batch experiments were performed in a bench scale biocalorimeter for alkaline protease production by P. aeruginosa using optimized process conditions. Tessier’s double substrate growth model was found to provide a good fit for the growth of P. aeruginosa in the biocalorimeter,and the biokinetic parameters were estimated. The heat flow profile resulting from metabolic activity of P. aeruginosa was shown to accurately depict both the kinetics of cell growth and protease production. Biokinetic and bioenergetic analysis on the growth of P. aeruginosa revealed that peptone is preferentially used as the substrate for its intracellular activities and glycerol acts as an energy source for its growth metabolism.
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Analysis of Electromagnetic and Vibration Characteristics of a Spoke Type PMBLDC Motor
Kurinjimalar Loganathan,Balaji Mahadevan,Prabhu Sundramoorthy,Umadevi Ramkumar 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.5
This paper investigates the electromagnetic and structural characteristics of a spoke type BLDC motor and provides a comparative study with respect to Interior Permanent Magnet motor (IPM).The electromagnetic analysis aims to determine the average torque and cogging torque of spoke type BLDC motor. The natural and induced vibration characteristics of the motor are evaluated by performing structural fi nite element analysis. The electromagnetic and vibration characteristics are assessed for diff erent slot/pole combination to provide an insight on their infl uence on the performance of the motor. In addition, thermal analysis is performed to predict the temperature distribution and a comprehensive analysis of spoke type BLDC motor is presented.
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Analysis and Implementation of Two Phase Flux Reversal Free Doubly Salient Machine
Prabhu Sundaramoorthy,Balaji Mahadevan 한국자기학회 2018 Journal of Magnetics Vol.23 No.3
The major factors that limit the application prospects of Switched Reluctance Motor (SRM) include torque ripple, noise and vibration. The main reason attributed to these drawbacks is the nature of flux linkage variation in accordance with rotor position. In this aspect this work analyses the effect of embedding permanent magnets in the stator and the impact of their orientation on the flux linkage characteristics and hence on the performance of the motor. In addition the effect of lamination material on the characteristics of the motor is analysed. The materials considered include M850-65A, M-19, M-43, Pure Soft Iron, and M800-50D. This paper proposes, the optimization of Permanent Magnet Flux Reversal Free Switched Reluctance Motor (PMFRFSRM) through the orientation of permanent magnets and choice of suitable laminating materials to improve the performance characteristics of the motor. The analysis is performed using Finite Element Analysis (FEA) based package MagNet and the results are validated with hardware prototype.
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Augustine Mathu Gnaniah,Balaji Mahadevan,Kamaraj Vijayarajan 한국자기학회 2020 Journal of Magnetics Vol.25 No.3
This work deals with the torque ripple minimization techniques of Segmented Rotor Switched Reluctance Motor (SSRM) for cooling fan application. Torque ripple, acoustic noise and vibration are factors resisting the segmented rotor SRM. To overcome this, stator and rotor pole modifications along with the effects of laminating steel material have been analyzed for the performance improvement of the machine. The performance of the machine with different laminating steel materials such as M19, M850-65A, M890-50d and M43 are compared with the conventional CR-10 steel material. With respect to pole shape modifications the analysis has been performed by considering stator pole taper, stator pole arc, rotor segement structure and rotor pole depth. The results highlight the influence of structural modifications and material properties on the performance of the motor. The results of electromagnetic analysis disclose that the segmented rotor configuration with M890- 50d material exhibits superior electromagnetic characteristics.
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