Pub Date : 2004-11-29DOI: 10.1109/PECON.2004.1461630
L. Ling, N. A. Azli
A space vector modulation (SVM) based hysteresis current controller (HCC) technique for a three phase shunt active power filter is proposed. The switching control algorithms of the proposed SVM based HCC manage to generate compensated current according to the reference current harmonics extraction is based on the instantaneous active and reactive power theorem in time domain by calculating the power compensation. A closed loop control system is implemented and the error current is the difference between the reference current obtained from the power compensation and the actual current that needs to be injected back into the line. By implementing this control strategy, the active power filter (APF) manages to generate better compensated harmonics currents to the line.
{"title":"SVM based hysteresis current controller for a three phase active power filter","authors":"L. Ling, N. A. Azli","doi":"10.1109/PECON.2004.1461630","DOIUrl":"https://doi.org/10.1109/PECON.2004.1461630","url":null,"abstract":"A space vector modulation (SVM) based hysteresis current controller (HCC) technique for a three phase shunt active power filter is proposed. The switching control algorithms of the proposed SVM based HCC manage to generate compensated current according to the reference current harmonics extraction is based on the instantaneous active and reactive power theorem in time domain by calculating the power compensation. A closed loop control system is implemented and the error current is the difference between the reference current obtained from the power compensation and the actual current that needs to be injected back into the line. By implementing this control strategy, the active power filter (APF) manages to generate better compensated harmonics currents to the line.","PeriodicalId":375856,"journal":{"name":"PECon 2004. Proceedings. National Power and Energy Conference, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131308225","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 : 2004-11-29DOI: 10.1109/PECON.2004.1461614
R. Gobbi, N. Sahoo, M. A. Ahamed Khan
This paper deals with a fundamental control issue in switched reluctance motor (SRM) drives - the torque ripples. Normally, torque ripple minimization is achieved by using a look-up table, i.e., the look-up table uses stored magnetic characteristics to provide the reference current. A number of techniques for the generation of reference current profiles that minimize the torque ripples have been suggested. But because of highly nonlinear characteristics of the SRM, all these schemes are not fully successful. Our work deals with a novel algorithm for generation of current waveforms by iterative modulation of the reference current pattern by using a gain for minimizing the torque ripple. This gain is computed with the aid of fuzzy logic, which is well suited to compensate for the nonlinearities of the system. Simple two-phase-on current scheme is used for the study. Performance of the proposed strategy is verified by simulation.
{"title":"A fuzzy logic based current modulation for torque ripple minimization in switched reluctance motors","authors":"R. Gobbi, N. Sahoo, M. A. Ahamed Khan","doi":"10.1109/PECON.2004.1461614","DOIUrl":"https://doi.org/10.1109/PECON.2004.1461614","url":null,"abstract":"This paper deals with a fundamental control issue in switched reluctance motor (SRM) drives - the torque ripples. Normally, torque ripple minimization is achieved by using a look-up table, i.e., the look-up table uses stored magnetic characteristics to provide the reference current. A number of techniques for the generation of reference current profiles that minimize the torque ripples have been suggested. But because of highly nonlinear characteristics of the SRM, all these schemes are not fully successful. Our work deals with a novel algorithm for generation of current waveforms by iterative modulation of the reference current pattern by using a gain for minimizing the torque ripple. This gain is computed with the aid of fuzzy logic, which is well suited to compensate for the nonlinearities of the system. Simple two-phase-on current scheme is used for the study. Performance of the proposed strategy is verified by simulation.","PeriodicalId":375856,"journal":{"name":"PECon 2004. Proceedings. National Power and Energy Conference, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123926122","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 : 2004-11-29DOI: 10.1109/PECON.2004.1461631
M.N. Abdul Kadir, Z. Hussien
This paper proposes a base-three ratio for the selection of asymmetrical multilevel inverter voltage source. The advantage is the optimum output voltage quality for a particular power circuit configuration. The series H-bridges topology with four-cell per arm inverter has been investigated. This configuration conventionally forms a 9-level inverter when used in symmetrical multilevel inverter. However with the proposed voltage selection in asymmetrical multilevel inverter, the number of levels increases to 81. A lookup table-based controller has been designed and shown to provide high quality output voltage for a wide range of modulation index. Simulation has been conducted to show that the optimum output voltage quality has been produced. Examination of the switching signals reveals that the higher voltage cells operate at lower frequency. Investigation on the input currents of the inverter shows that the higher power H-bridge cells require unidirectional current if the load power factor is high enough.
{"title":"Asymmetrical multilevel inverter using ratio-three based sources","authors":"M.N. Abdul Kadir, Z. Hussien","doi":"10.1109/PECON.2004.1461631","DOIUrl":"https://doi.org/10.1109/PECON.2004.1461631","url":null,"abstract":"This paper proposes a base-three ratio for the selection of asymmetrical multilevel inverter voltage source. The advantage is the optimum output voltage quality for a particular power circuit configuration. The series H-bridges topology with four-cell per arm inverter has been investigated. This configuration conventionally forms a 9-level inverter when used in symmetrical multilevel inverter. However with the proposed voltage selection in asymmetrical multilevel inverter, the number of levels increases to 81. A lookup table-based controller has been designed and shown to provide high quality output voltage for a wide range of modulation index. Simulation has been conducted to show that the optimum output voltage quality has been produced. Examination of the switching signals reveals that the higher voltage cells operate at lower frequency. Investigation on the input currents of the inverter shows that the higher power H-bridge cells require unidirectional current if the load power factor is high enough.","PeriodicalId":375856,"journal":{"name":"PECon 2004. Proceedings. National Power and Energy Conference, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124175024","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 : 2004-11-29DOI: 10.1109/PECON.2004.1461624
M. Norhisam, A.N. Azita, J. Wong, J.I. Syed, N. Mariun
In recent years, researcher has developed many actuators with different configurations depending on application required. Linear actuator has become one of the most popular actuator used in industry especially in office automation and factory automation. Linear motor, which have a compact and simple structure are easy to control compare to rotational motor [Technical committee of IEEJ on small precision motor, 1991]. The advantages of linear actuator are small size, low power and high thrust. The thrust of linear motor can be applied on to the load without any mechanical loss as rotation motor. This paper presents on the basic principle of a linear DC actuator (LDA), the structure and the thrust generation. The derivation of thrust expression and calculation of thrust are discussed in detail. The reluctance of linkage flux is considered to achieve a good accuracy of calculation. The calculation result and the measurement are compared. As a result the calculation and measurement are in the good accuracy of calculation result.
{"title":"Calculation of static thrust on a linear DC actuator","authors":"M. Norhisam, A.N. Azita, J. Wong, J.I. Syed, N. Mariun","doi":"10.1109/PECON.2004.1461624","DOIUrl":"https://doi.org/10.1109/PECON.2004.1461624","url":null,"abstract":"In recent years, researcher has developed many actuators with different configurations depending on application required. Linear actuator has become one of the most popular actuator used in industry especially in office automation and factory automation. Linear motor, which have a compact and simple structure are easy to control compare to rotational motor [Technical committee of IEEJ on small precision motor, 1991]. The advantages of linear actuator are small size, low power and high thrust. The thrust of linear motor can be applied on to the load without any mechanical loss as rotation motor. This paper presents on the basic principle of a linear DC actuator (LDA), the structure and the thrust generation. The derivation of thrust expression and calculation of thrust are discussed in detail. The reluctance of linkage flux is considered to achieve a good accuracy of calculation. The calculation result and the measurement are compared. As a result the calculation and measurement are in the good accuracy of calculation result.","PeriodicalId":375856,"journal":{"name":"PECon 2004. Proceedings. National Power and Energy Conference, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115840657","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 : 2004-11-29DOI: 10.1109/PECON.2004.1461655
C.S. Hoong, S. Taib, C. M. Hadzer, M. Syafrudin
The main aim of this paper is to presents the development of low cost design for 35 W transformer less halogen lamp step down converter from 240 VAC to 12 VAC in stable output. This paper presents the methodology of solving the critical problem and circuit design of a halogen dimmer without utilizing the isolation transformer. This approach increased the efficiency and minimizes the power losses through transformer. The design focused on low power losses, low cost design and stable output voltage included environment factor such as dirty AC lines, surge current and harmonics. It is found the power loss is 3 W through step down resistor for firing circuit and NTC.
{"title":"Transformer less halogen lamp step-down converter","authors":"C.S. Hoong, S. Taib, C. M. Hadzer, M. Syafrudin","doi":"10.1109/PECON.2004.1461655","DOIUrl":"https://doi.org/10.1109/PECON.2004.1461655","url":null,"abstract":"The main aim of this paper is to presents the development of low cost design for 35 W transformer less halogen lamp step down converter from 240 VAC to 12 VAC in stable output. This paper presents the methodology of solving the critical problem and circuit design of a halogen dimmer without utilizing the isolation transformer. This approach increased the efficiency and minimizes the power losses through transformer. The design focused on low power losses, low cost design and stable output voltage included environment factor such as dirty AC lines, surge current and harmonics. It is found the power loss is 3 W through step down resistor for firing circuit and NTC.","PeriodicalId":375856,"journal":{"name":"PECon 2004. Proceedings. National Power and Energy Conference, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133037502","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 : 2004-11-29DOI: 10.1109/PECON.2004.1461615
Mohibullah, N. A. Abdul Wahab, M.S.B. Mohammad Othman
Fuses have been produced over hundred of years and are in use throughout the world in large numbers. They are the common protective device for the over current protection. They perform the vital role of protecting electrical equipments and networks and ensure that the faults are removed in minimum time and the continuity of supply is maintained to consumers at high level. The fuses are also used to prevent the power electronic devices and circuit from damage. This paper experimentally determines the different fuse characteristics of a rewirable fuse in the saline water. Solder wire has been tested for fuse protection. The experimental setup has been designed to carry testing of fuse in different quenching media with different lengths of wires. The experimental results show that semiconductor devices can be protected with an ordinary rewirable solder wire fuse. The joule integral (I/sup 2/t) heating of solder wire is faster compared to costly semiconductor fuse with better fuse characteristics. The experimental results show, based on the I/sup 2/t of the device, that the solder wire with particular length and diameter can be used to replace the fast acting semiconductor fuse with negligible cost. These fuses can be used for experimental work where it could be easily replaced but for commercial use special casing can be designed to handle the problem of replacement after the fuse is blown. The new method of fuse design is suggested where a simple rewirable fuse with almost negligible cost that can protect the semiconductor devices. This project is to determine experimentally the different fuse characteristics of a rewirable fuse in the saline water, distilled water and oil. Three different diameters of fuse wire have been tested for fuse protection. The experimental setup has been designed to carry testing of fuse in different quenching media.
{"title":"The solder wire fuse protection for power electronic devices","authors":"Mohibullah, N. A. Abdul Wahab, M.S.B. Mohammad Othman","doi":"10.1109/PECON.2004.1461615","DOIUrl":"https://doi.org/10.1109/PECON.2004.1461615","url":null,"abstract":"Fuses have been produced over hundred of years and are in use throughout the world in large numbers. They are the common protective device for the over current protection. They perform the vital role of protecting electrical equipments and networks and ensure that the faults are removed in minimum time and the continuity of supply is maintained to consumers at high level. The fuses are also used to prevent the power electronic devices and circuit from damage. This paper experimentally determines the different fuse characteristics of a rewirable fuse in the saline water. Solder wire has been tested for fuse protection. The experimental setup has been designed to carry testing of fuse in different quenching media with different lengths of wires. The experimental results show that semiconductor devices can be protected with an ordinary rewirable solder wire fuse. The joule integral (I/sup 2/t) heating of solder wire is faster compared to costly semiconductor fuse with better fuse characteristics. The experimental results show, based on the I/sup 2/t of the device, that the solder wire with particular length and diameter can be used to replace the fast acting semiconductor fuse with negligible cost. These fuses can be used for experimental work where it could be easily replaced but for commercial use special casing can be designed to handle the problem of replacement after the fuse is blown. The new method of fuse design is suggested where a simple rewirable fuse with almost negligible cost that can protect the semiconductor devices. This project is to determine experimentally the different fuse characteristics of a rewirable fuse in the saline water, distilled water and oil. Three different diameters of fuse wire have been tested for fuse protection. The experimental setup has been designed to carry testing of fuse in different quenching media.","PeriodicalId":375856,"journal":{"name":"PECon 2004. Proceedings. National Power and Energy Conference, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125131792","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 : 2004-11-29DOI: 10.1109/PECON.2004.1461621
A. Yatim, W. M. Utomo
One of the methods used to increase energy savings in air conditioning system is by varying the speed of the motor compressor. A neural network control based on scalar control model for variable speed induction motor compressor is proposed. The controller is used to generate the signals of the voltage and frequency reference control. This system can be used to minimize the input power required to the motor drive in steady state and transient change conditions. The proposed method is tested by MATLAB simulation.
{"title":"On line optimal control of variable speed compressor motor drive system using neural control model","authors":"A. Yatim, W. M. Utomo","doi":"10.1109/PECON.2004.1461621","DOIUrl":"https://doi.org/10.1109/PECON.2004.1461621","url":null,"abstract":"One of the methods used to increase energy savings in air conditioning system is by varying the speed of the motor compressor. A neural network control based on scalar control model for variable speed induction motor compressor is proposed. The controller is used to generate the signals of the voltage and frequency reference control. This system can be used to minimize the input power required to the motor drive in steady state and transient change conditions. The proposed method is tested by MATLAB simulation.","PeriodicalId":375856,"journal":{"name":"PECon 2004. Proceedings. National Power and Energy Conference, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127421212","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 : 2004-11-29DOI: 10.1109/PECON.2004.1461608
S. Jamaan, M. Majid, M. Mustaffa, H. Abdul Rahman
A micro-computer based Pl and fuzzy logic automatic voltage regulator is applied to a micro-alternator system. This paper describes the design and implementation of PI and fuzzy logic automatic voltage regulator of a micro-alternator. A comparative study of Pl and fuzzy logic AVR Is analyzed and results show that the fuzzy logic improves the system damping subject to disturbances. Borland Delphi is used to develop the software algorithm for the controller.
{"title":"A comparative study of PI and fuzzy logic automatic voltage regulator of a micro-alternator system","authors":"S. Jamaan, M. Majid, M. Mustaffa, H. Abdul Rahman","doi":"10.1109/PECON.2004.1461608","DOIUrl":"https://doi.org/10.1109/PECON.2004.1461608","url":null,"abstract":"A micro-computer based Pl and fuzzy logic automatic voltage regulator is applied to a micro-alternator system. This paper describes the design and implementation of PI and fuzzy logic automatic voltage regulator of a micro-alternator. A comparative study of Pl and fuzzy logic AVR Is analyzed and results show that the fuzzy logic improves the system damping subject to disturbances. Borland Delphi is used to develop the software algorithm for the controller.","PeriodicalId":375856,"journal":{"name":"PECon 2004. Proceedings. National Power and Energy Conference, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124972678","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 : 2004-11-29DOI: 10.1109/PECON.2004.1461649
S.N.A.L. Yousif, M. Wanik, A. Mohamed
This paper presents different passive filter designs to mitigate harmonics in an industrial distribution system. The passive filters considered are the single tuned and double tuned harmonic filters. In the design of the filters, the passive elements of the filters are derived. Studies are made to investigate the effectiveness of using single and double tuned filters in reducing harmonic distortions and also to determine the optimal location of installing the filters. The effects of power factor correction capacitor and load parameters variation on harmonic distortion are also investigated. Simulation results show that the double tuned filter is more effective in reducing harmonics as compared to single tuned filters. The study also proves that both filters give better performance in reducing harmonics when they are placed close to the harmonic producing loads.
{"title":"Implementation of different passive filter designs for harmonic mitigation","authors":"S.N.A.L. Yousif, M. Wanik, A. Mohamed","doi":"10.1109/PECON.2004.1461649","DOIUrl":"https://doi.org/10.1109/PECON.2004.1461649","url":null,"abstract":"This paper presents different passive filter designs to mitigate harmonics in an industrial distribution system. The passive filters considered are the single tuned and double tuned harmonic filters. In the design of the filters, the passive elements of the filters are derived. Studies are made to investigate the effectiveness of using single and double tuned filters in reducing harmonic distortions and also to determine the optimal location of installing the filters. The effects of power factor correction capacitor and load parameters variation on harmonic distortion are also investigated. Simulation results show that the double tuned filter is more effective in reducing harmonics as compared to single tuned filters. The study also proves that both filters give better performance in reducing harmonics when they are placed close to the harmonic producing loads.","PeriodicalId":375856,"journal":{"name":"PECon 2004. Proceedings. National Power and Energy Conference, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114508786","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 : 2004-11-29DOI: 10.1109/PECON.2004.1461634
V. Meksarik, Syafrudin Masri, Soib Taib, C. M. Hadzer
In this paper, a development of high efficiency boost converter for photovoltaic application is presented. The design aimed to create a completely self-contained unit capable of converting light energy from the sun into electrical energy. The initial goal was to build a device that could provide a stable 24 V/sub dc/ output, from a fluctuating direct current-linked input voltage from the photovoltaic array. The typical application of this boost converter is to provide a DC power supply for inverter either for grid connected or standalone system. To perform the optimum operation for the design topology the simulation software PESIM was utilised. The chip UA3843A was used in order to get the specification target. The 120 W converter has been developed with 1.2% of maximum output voltage ripple and the capability of efficiency is achieved more than 85%.
{"title":"Development of high efficiency boost converter for photovoltaic application","authors":"V. Meksarik, Syafrudin Masri, Soib Taib, C. M. Hadzer","doi":"10.1109/PECON.2004.1461634","DOIUrl":"https://doi.org/10.1109/PECON.2004.1461634","url":null,"abstract":"In this paper, a development of high efficiency boost converter for photovoltaic application is presented. The design aimed to create a completely self-contained unit capable of converting light energy from the sun into electrical energy. The initial goal was to build a device that could provide a stable 24 V/sub dc/ output, from a fluctuating direct current-linked input voltage from the photovoltaic array. The typical application of this boost converter is to provide a DC power supply for inverter either for grid connected or standalone system. To perform the optimum operation for the design topology the simulation software PESIM was utilised. The chip UA3843A was used in order to get the specification target. The 120 W converter has been developed with 1.2% of maximum output voltage ripple and the capability of efficiency is achieved more than 85%.","PeriodicalId":375856,"journal":{"name":"PECon 2004. Proceedings. National Power and Energy Conference, 2004.","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2004-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133556578","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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