Pub Date : 2014-07-24DOI: 10.1109/AICERA.2014.6908254
Abi Varghese, J. Jacob
Husking of coconut is among the most-difficult post-harvest operations relevant to coconut. It involves much human drudgery. At present, the husking is generally done manually using either a machete or a crowbar. Much skill, training, and endurance are required in this. Attempts made so far in developing husking tools have been only partially successful and not very effective. Considering the drawbacks of existing manual husking methods, a coconut husking tool was designed and fabricated. The machine conceived shall have an upright twin-wedge assembly; one wedge stationary and the other movable. In its idle state, both the wedges remain together as if juxtaposed. The coconut is impaled with both the hands on to the two juxtaposed wedge-like blades oriented upwards. On pulling the lever upwards by one hand, the movable wedge placed on the load arm of the lever swings away from the stationary wedge loosening a sector of the husk from the nut. By repeating twice or thrice the husk can be separated completely from the coconut. It took only about 7-15 seconds for husking a green nut depending upon the variety, maturity of nut and skill of operator. This was 9-18s for dry coconuts. It is light in weight (2.5 kg), and simple to use and handle.
{"title":"A study on the KAU coconut husking tool","authors":"Abi Varghese, J. Jacob","doi":"10.1109/AICERA.2014.6908254","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908254","url":null,"abstract":"Husking of coconut is among the most-difficult post-harvest operations relevant to coconut. It involves much human drudgery. At present, the husking is generally done manually using either a machete or a crowbar. Much skill, training, and endurance are required in this. Attempts made so far in developing husking tools have been only partially successful and not very effective. Considering the drawbacks of existing manual husking methods, a coconut husking tool was designed and fabricated. The machine conceived shall have an upright twin-wedge assembly; one wedge stationary and the other movable. In its idle state, both the wedges remain together as if juxtaposed. The coconut is impaled with both the hands on to the two juxtaposed wedge-like blades oriented upwards. On pulling the lever upwards by one hand, the movable wedge placed on the load arm of the lever swings away from the stationary wedge loosening a sector of the husk from the nut. By repeating twice or thrice the husk can be separated completely from the coconut. It took only about 7-15 seconds for husking a green nut depending upon the variety, maturity of nut and skill of operator. This was 9-18s for dry coconuts. It is light in weight (2.5 kg), and simple to use and handle.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116546955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-07-24DOI: 10.1109/AICERA.2014.6908230
Anju Abraham, A. Mathew
This paper presents a bridgeless Cuk rectifier fed Brushless Direct Current Motor (BLDC) drive, for power factor correction and efficiency optimization, which is useful for low power applications. Speed control with load variation is achieved by the closed loop control of BLDC motor. Bridgeless configuration of this PFC converter offers the elimination of Diode Bridge Rectifier and hence reduces the conduction losses associated with it. Power quality of input ac mains is improved by this Cuk rectifier topology. Total Harmonic Distortion (THD) of supply current is within lower limits according to IEC standards. Modeling and simulation of the proposed scheme is done in MATLABSimulink software, and obtained proper results.
{"title":"Implementation of a novel PFC Cuk rectifier fed brushless DC motor drive","authors":"Anju Abraham, A. Mathew","doi":"10.1109/AICERA.2014.6908230","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908230","url":null,"abstract":"This paper presents a bridgeless Cuk rectifier fed Brushless Direct Current Motor (BLDC) drive, for power factor correction and efficiency optimization, which is useful for low power applications. Speed control with load variation is achieved by the closed loop control of BLDC motor. Bridgeless configuration of this PFC converter offers the elimination of Diode Bridge Rectifier and hence reduces the conduction losses associated with it. Power quality of input ac mains is improved by this Cuk rectifier topology. Total Harmonic Distortion (THD) of supply current is within lower limits according to IEC standards. Modeling and simulation of the proposed scheme is done in MATLABSimulink software, and obtained proper results.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122587941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-07-24DOI: 10.1109/AICERA.2014.6908260
B. Champaty, P. Dubey, Saikat Sahoo, S. S. Ray, K. Pal, A. Anis
Electromyogram (EMG) - controlled devices are being explored for controlling the functioning of the rehabilitation devices. The main advantage of these devices is the hands-free operation with minimal need for assistance. The present study delineates the development of a wireless EMG control system. The proposed control system was tested using a miniaturized wheelchair model. The proposed control system eliminates the presently implemented complex wired control system. The developed control system may also be used for operating other rehabilitation aids (e.g. robotic arm).
{"title":"Development of wireless EMG control system for rehabilitation devices","authors":"B. Champaty, P. Dubey, Saikat Sahoo, S. S. Ray, K. Pal, A. Anis","doi":"10.1109/AICERA.2014.6908260","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908260","url":null,"abstract":"Electromyogram (EMG) - controlled devices are being explored for controlling the functioning of the rehabilitation devices. The main advantage of these devices is the hands-free operation with minimal need for assistance. The present study delineates the development of a wireless EMG control system. The proposed control system was tested using a miniaturized wheelchair model. The proposed control system eliminates the presently implemented complex wired control system. The developed control system may also be used for operating other rehabilitation aids (e.g. robotic arm).","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128221143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-07-24DOI: 10.1109/AICERA.2014.6908163
Daniel Matthews, Shuping Dang, Loucas Christodoulou, Han Chen, Yamen Hawit
The Embedded Systems Project is at the core of the second-year electrical and electronic engineering course at the University of Manchester. The objective is to construct a working buggy based on microcontroller, which is able to autonomously detect a white line from a black surface then navigate around a track via the white line. It must be able to tackle obstacles, including slopes, different break points on the track and corners and reach the end of the track successfully. In addition, not only the operation, but also the speed of the buggy should be taken into consideration; the faster, the better.
{"title":"Embedded systems project: Innovative autonomous line-following buggy design and implementation","authors":"Daniel Matthews, Shuping Dang, Loucas Christodoulou, Han Chen, Yamen Hawit","doi":"10.1109/AICERA.2014.6908163","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908163","url":null,"abstract":"The Embedded Systems Project is at the core of the second-year electrical and electronic engineering course at the University of Manchester. The objective is to construct a working buggy based on microcontroller, which is able to autonomously detect a white line from a black surface then navigate around a track via the white line. It must be able to tackle obstacles, including slopes, different break points on the track and corners and reach the end of the track successfully. In addition, not only the operation, but also the speed of the buggy should be taken into consideration; the faster, the better.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130528682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-07-24DOI: 10.1109/AICERA.2014.6908282
A. Thomas, S. Mathew
Demand for renewable energy resources are considerably increasing due to the decline of fossil fuels and various environmental issues. In remote areas, there is a wide availability of solar energy, when they are properly harnessed, they can be used to serve industrial as well as residential loads. Induction motors are the workhorses for industrial applications. MPPT algorithm is used to track the maximum power from the PV panel. A boost converter is used for MPPT applications due to high performance compared to other DC-DC converters. A novel single source five level inverter is used to converter the input DC voltage from renewable energy sources to AC voltage. Single source five level inverter reduces the THD, switching losses and improves the inverter efficiency. AC output from the single source five level inverter is used to drive the induction motor.
{"title":"Solar powered single phase induction motor using single source five level inverter","authors":"A. Thomas, S. Mathew","doi":"10.1109/AICERA.2014.6908282","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908282","url":null,"abstract":"Demand for renewable energy resources are considerably increasing due to the decline of fossil fuels and various environmental issues. In remote areas, there is a wide availability of solar energy, when they are properly harnessed, they can be used to serve industrial as well as residential loads. Induction motors are the workhorses for industrial applications. MPPT algorithm is used to track the maximum power from the PV panel. A boost converter is used for MPPT applications due to high performance compared to other DC-DC converters. A novel single source five level inverter is used to converter the input DC voltage from renewable energy sources to AC voltage. Single source five level inverter reduces the THD, switching losses and improves the inverter efficiency. AC output from the single source five level inverter is used to drive the induction motor.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121566767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-07-24DOI: 10.1109/AICERA.2014.6908279
Manjesh, A. Ananda
Most of the researchers working on power electronic converters and inverter system, in the present technology power electronic converters and inverters have many limitations in industrial applications. Industrial applications needs high torque, long life and high reliability power electronic systems. It is very difficult task of designing the power electronic system to meet the industrial demands, although many factors and parameters which are adversely contribute to minimize the efficiency and life time of the system. The major factors involved to obtain an efficient power transmission, are the dominant factor of harmonics that disturb the required voltage waveform. This work highlights the methods and analysis of harmonics and THD of the five Phase PWM drive, the reduction harmonics has been obtained by the PWM Inverter, this is done by studying THD with LC filter and DC level capacitor voltage balancing scheme using MATLAB programming. The harmonic distortion has been reduced and compared with normal PWM drive is presented in this paper.
{"title":"Analysis and study of total harmonic distortion in five phase PWM inverter using LC filter with neutral point DC link capacitor voltage balancing scheme","authors":"Manjesh, A. Ananda","doi":"10.1109/AICERA.2014.6908279","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908279","url":null,"abstract":"Most of the researchers working on power electronic converters and inverter system, in the present technology power electronic converters and inverters have many limitations in industrial applications. Industrial applications needs high torque, long life and high reliability power electronic systems. It is very difficult task of designing the power electronic system to meet the industrial demands, although many factors and parameters which are adversely contribute to minimize the efficiency and life time of the system. The major factors involved to obtain an efficient power transmission, are the dominant factor of harmonics that disturb the required voltage waveform. This work highlights the methods and analysis of harmonics and THD of the five Phase PWM drive, the reduction harmonics has been obtained by the PWM Inverter, this is done by studying THD with LC filter and DC level capacitor voltage balancing scheme using MATLAB programming. The harmonic distortion has been reduced and compared with normal PWM drive is presented in this paper.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"22 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124452958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-07-24DOI: 10.1109/AICERA.2014.6908283
Aju S. Nair, S. Kini
New developmentsin solid state lighting allows us to use energy efficient LEDs in general lighting. Solid state lighting provides both energy and environmental benefits. One of the main specialties of LEDs over conventional light source is the controllability of its color temperature. This paper illustrates dynamic color temperature tuning of the multi colored LEDs to get different shades of white color using FPGA. The color tuning allows the user to control the human performance. The principle of additive color mixing algorithm is adopted for getting the desired white color from a set of multicolored LEDs. The control of intensity and color temperature is achieved by 4 channel current controlled buck converter by adjusting the PWM of each. The output current compensation for the LED is given by a type 2 PI controller. The proposed design and control algorithm assure very small color temperature variations and allows the user a full control over the luminance.
{"title":"FPGA based buck controller for LED white light tuning","authors":"Aju S. Nair, S. Kini","doi":"10.1109/AICERA.2014.6908283","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908283","url":null,"abstract":"New developmentsin solid state lighting allows us to use energy efficient LEDs in general lighting. Solid state lighting provides both energy and environmental benefits. One of the main specialties of LEDs over conventional light source is the controllability of its color temperature. This paper illustrates dynamic color temperature tuning of the multi colored LEDs to get different shades of white color using FPGA. The color tuning allows the user to control the human performance. The principle of additive color mixing algorithm is adopted for getting the desired white color from a set of multicolored LEDs. The control of intensity and color temperature is achieved by 4 channel current controlled buck converter by adjusting the PWM of each. The output current compensation for the LED is given by a type 2 PI controller. The proposed design and control algorithm assure very small color temperature variations and allows the user a full control over the luminance.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124073790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-07-24DOI: 10.1109/AICERA.2014.6908200
Rosemin Parackal, Rinu Alice Koshy
The limited energy resources in the world promotes the increased utilization of renewable sources like solar energy. This could be harnessed using photovoltaic panels, which require Maximum power point tracking (MPPT) techniques to have the maximum usage of the panel output power. Among the algorithms for tracking the proposed method uses Perturb and Observe (P&O) MPPT. The P&O controller controls the duty cycle of the zeta converter, which finally controls the brushless DC (BLDC) motor. Speed of the motor can be controlled by adjusting the voltage at the dc link of the inverter that feeds the motor. Thus a PV powered Zeta converter fed BLDC drive model is proposed. The effectiveness of the model is verified using simulation done in PSIM.
{"title":"PV powered zeta converter fed BLDC drive","authors":"Rosemin Parackal, Rinu Alice Koshy","doi":"10.1109/AICERA.2014.6908200","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908200","url":null,"abstract":"The limited energy resources in the world promotes the increased utilization of renewable sources like solar energy. This could be harnessed using photovoltaic panels, which require Maximum power point tracking (MPPT) techniques to have the maximum usage of the panel output power. Among the algorithms for tracking the proposed method uses Perturb and Observe (P&O) MPPT. The P&O controller controls the duty cycle of the zeta converter, which finally controls the brushless DC (BLDC) motor. Speed of the motor can be controlled by adjusting the voltage at the dc link of the inverter that feeds the motor. Thus a PV powered Zeta converter fed BLDC drive model is proposed. The effectiveness of the model is verified using simulation done in PSIM.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127707776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-07-24DOI: 10.1109/AICERA.2014.6908234
M. Kumbhar, R. Bindu, Abhilash Walavalkar
This paper presents electric release brake which is mainly used for safety purpose where emergency stop is required in automation or process industry. Brake is in engage condition when power cut occurs intentionally or accidently. For the given brake, coil is designed to get the required magnetic force. Due to friction between armature plate and body, the air gap between them increases. Magnetostatic analysis is carried out to see the effect of variable air gap and to get sufficient magnetic force upto 1 mm gap. During normal working condition brake is in disengage condition but brake coil is energized. Optimum utilization of brake coil is obtained using PWM method and power consumption is reduced. Also brake engagement time is reduced using simple circuit with zener diode.
{"title":"Magnetostatic analysis and power optimization of electric release brake","authors":"M. Kumbhar, R. Bindu, Abhilash Walavalkar","doi":"10.1109/AICERA.2014.6908234","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908234","url":null,"abstract":"This paper presents electric release brake which is mainly used for safety purpose where emergency stop is required in automation or process industry. Brake is in engage condition when power cut occurs intentionally or accidently. For the given brake, coil is designed to get the required magnetic force. Due to friction between armature plate and body, the air gap between them increases. Magnetostatic analysis is carried out to see the effect of variable air gap and to get sufficient magnetic force upto 1 mm gap. During normal working condition brake is in disengage condition but brake coil is energized. Optimum utilization of brake coil is obtained using PWM method and power consumption is reduced. Also brake engagement time is reduced using simple circuit with zener diode.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"226 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115745298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-07-24DOI: 10.1109/AICERA.2014.6908268
Titu Mary Ignatius, Jobin K. Antony, Silpa Rose Mary
Dynamic Flash ADC has lot of applications in real time systems and mixed signal systems, where analog signals are converted to digital signals and then processed. In the present work, a new high performance dynamic Flash ADC is designed, which employs fast thermometer encoder and low power open loop comparator. Subsequently, a dynamic Flash ADC using standard cells such as NAND, NOR and INVERTER is also designed and implemented. Various parameters of the new dynamic Flash ADCs are analysed and it is found that these designs are best suited for low power applications. These dynamic Flash ADCs are designed in 180nm technology and post layout simulation is performed using Cadence Spectre tool.
{"title":"Implementation of high performance dynamic flash ADC","authors":"Titu Mary Ignatius, Jobin K. Antony, Silpa Rose Mary","doi":"10.1109/AICERA.2014.6908268","DOIUrl":"https://doi.org/10.1109/AICERA.2014.6908268","url":null,"abstract":"Dynamic Flash ADC has lot of applications in real time systems and mixed signal systems, where analog signals are converted to digital signals and then processed. In the present work, a new high performance dynamic Flash ADC is designed, which employs fast thermometer encoder and low power open loop comparator. Subsequently, a dynamic Flash ADC using standard cells such as NAND, NOR and INVERTER is also designed and implemented. Various parameters of the new dynamic Flash ADCs are analysed and it is found that these designs are best suited for low power applications. These dynamic Flash ADCs are designed in 180nm technology and post layout simulation is performed using Cadence Spectre tool.","PeriodicalId":425226,"journal":{"name":"2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115939511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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