Adequate retention is a basic requirement for the acceptance of complete denture. The aim of this study was to evaluate the retention quality of fluid denture base materials and compare it with conventional acrylic denture base materials Method: Sixteen edentulous male patients with an age 45-60 years participated in the study. For each patient two denture bases were constructed, one of them made from fluid denture base materials and the other made from hot acrylic denture base materials. A specially designed strain gauge measuring device was used to measure the force required to dislodge the two dentures from basal seats. Six measurements of retention of newly inserted denture base were recorded for each patient (three for maxillary acrylic denture base and three for maxillary fluid denture base). Results: The results of the retention test showed that the fluid denture base materials required more force in order to dislodge denture than the heat cure denture base materials, which means a significant improvement in retention quality obtained by fluid denture base materials. Conclusions: It has appeared that the fluid acrylic denture base materials produce denture base material with excellent retentive efficiency to the underlying tissue when compared to conventional denture base materials.
{"title":"The Comparison of Retention between Hot Curing and\u0000Fluid Denture Base Acrylic Resin\u0000(In Vivo)","authors":"Bestun Akram, R. Hasan","doi":"10.32441/kjps.02.02.p10","DOIUrl":"https://doi.org/10.32441/kjps.02.02.p10","url":null,"abstract":"Adequate retention is a basic requirement for the acceptance of complete denture. The aim of this study was to evaluate the retention quality of fluid denture base materials and compare it with conventional acrylic denture base materials Method: Sixteen edentulous male patients with an age 45-60 years participated in the study. For each patient two denture bases were constructed, one of them made from fluid denture base\u0000materials and the other made from hot acrylic denture base materials. A specially designed strain gauge measuring device was used to measure the force required to dislodge the two dentures from basal seats. Six measurements of retention of newly inserted denture base were recorded for each patient (three for maxillary acrylic denture base and three for maxillary fluid denture base). Results: The results of the retention test showed that the fluid denture base materials required more force in order to dislodge denture than the heat cure denture base materials, which means a significant improvement in retention quality obtained by fluid denture base materials. Conclusions: It has appeared that the fluid acrylic denture base materials produce denture base\u0000material with excellent retentive efficiency to the underlying tissue when compared to\u0000conventional denture base materials.","PeriodicalId":7451,"journal":{"name":"Al-Kitab Journal for Pure Sciences","volume":"76 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89141735","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}
Heat cure denture base is the most commonly used material for fabrication of removable prosthesis to the present day. However difficulties persist in fabrication of satisfactory prosthesis due to poor mechanical properties which have resulted in frequent repairs in dental practice. The present study is aimed to investigate the effect of Zirconium oxide nanoparticles (ZrO2NPs) on flexural strength and porosity of denture base and its correlation. X-ray diffraction (XRD) was used to check the purity of NPs. NPs was dispersed at 1%, 3% and 5% by weight to the monomer of methyl methacrylate with aid of probe sonicator. In addition, Scanning Electron Microscope (SEM) was used to observe agglomeration of particles within the acrylic. The results revealed significant flexural strength difference (p<0.05) between each concentration of ZrO2NPs. The analysis showed 17% and 11% reduction for 1% and 3% ZrO2NPs respectively while 5% caused a drastic reduction by 32% in reference to control. In regards to porosity, the results present no statistically significant difference among the concentrations in contrast to control. Pearson correlation showed strong and a negative relation (-0.83) between flexural strength and porosity. However, the results was not statistically significant (p=0.369). Within the limitations of this study, it can be concluded that the addition of ZrO2 caused reduction in flexural strength for all concentrations added. While it caused non-significant effect on porosity of acrylic. suitable additive to enhance the properties of PMMA.
{"title":"Effect of Addition Of Zirconium Oxide Nanoparticles on\u0000Flexural Strength and Porosity of Heat Cure Acrylic\u0000Resin","authors":"Ranj A. Omer, Fahd S. Ikram","doi":"10.32441/kjps.02.02.p7","DOIUrl":"https://doi.org/10.32441/kjps.02.02.p7","url":null,"abstract":"Heat cure denture base is the most commonly used material for fabrication of removable prosthesis to the present day. However difficulties persist in fabrication of satisfactory prosthesis due to poor mechanical properties which have resulted in frequent repairs in dental practice. The present study is aimed to investigate the effect of Zirconium oxide nanoparticles (ZrO2NPs) on flexural strength and porosity of denture base and its correlation. X-ray diffraction (XRD) was used to check the purity of NPs. NPs was dispersed at 1%, 3% and 5% by weight to the monomer of methyl methacrylate with aid of probe sonicator. In addition, Scanning Electron Microscope (SEM) was used to observe agglomeration of particles within the acrylic. The results revealed significant flexural strength difference (p<0.05) between each concentration of ZrO2NPs. The analysis showed 17% and 11% reduction for 1% and 3% ZrO2NPs respectively while 5% caused a drastic reduction by 32% in reference to control. In regards to porosity, the results present no statistically significant difference among the concentrations in contrast to control. Pearson correlation showed strong and a negative relation (-0.83) between flexural strength and porosity. However, the results was not statistically significant (p=0.369). Within the limitations of this study, it can be concluded that the addition of ZrO2 caused reduction in flexural strength for all concentrations added. While it caused non-significant effect on porosity of acrylic. suitable additive to enhance the properties of PMMA.","PeriodicalId":7451,"journal":{"name":"Al-Kitab Journal for Pure Sciences","volume":"326 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77123165","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}
the Artificial Immune Network, was developed using the Adaptive Neuro Fuzzy Inference System (ANFIS) by using the Immune Memory, The immunological network as an input to ANFIS technology to increase the chance of training a model based on the pattern of simulation of data patterns, as the immune memory resulting from the immunological network makes copies of data with characteristics similar to the original data. The proposed algorithm proved to have better and more efficient results rack on the patterns compared with the usual artificial immune system.
{"title":"A Hybrid Algorithm Between the Artificial Immunological\u0000Network and the ANFIS Technique with Application","authors":"Omar S. Kasim, Israa Alkhayyat","doi":"10.32441/kjps.02.02.p22","DOIUrl":"https://doi.org/10.32441/kjps.02.02.p22","url":null,"abstract":"the Artificial Immune Network, was developed using the Adaptive Neuro Fuzzy\u0000Inference System (ANFIS) by using the Immune Memory, The immunological network as an\u0000input to ANFIS technology to increase the chance of training a model based on the pattern of simulation of data patterns, as the immune memory resulting from the immunological\u0000network makes copies of data with characteristics similar to the original data. The proposed algorithm proved to have better and more efficient results rack on the patterns compared with the usual artificial immune system.","PeriodicalId":7451,"journal":{"name":"Al-Kitab Journal for Pure Sciences","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74719641","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}
This study has been carried out in Erbil City -Iraq, 30 patients were diagnosis by flow cytometry as AML which they were admitted to Nanakaly Hospital for Blood Disease and submitted to chemotherapy. Number of adults/children 22 (73.3%) / 8 (26.7%), female / male 13 (43.3%) / 17(56.7%). Only 20 (66.7%) patients were smoker. The highest number was subtyping M4 10 (33.3%) patients, followed by M1 7(23.3%), M3 6(20%), M2 were 3(10%) patients. M5 and M6 were 2 (6.7%). Ten candida spp isolates before induction phase chemotherapy show 9(90%) C.albicans, 1(10%) C. lusitaniae, and from 32 isolates after induction phase chemotherapy, 17(53.1%) C.albicans, 7(21.9%) C. lusitaniae, and 8(25%) C.famata. According to the site of infection, before starting chemotherapy 8(88.9%) C. albicans isolates were in the oral cavity and 1(11.1%) on the skin, while C. lusitaniae was 1 (100%) in oral cavity only. While after chemotherapy 12(70.6%) C.albicans in the oral cavity and 5(29.4%) on the skin, C. lusitaniae was 2 (28.6%) in the oral cavity and 5(71.4%) on the skin, while all C. famata was 8 (100%) on the skin The immunophenotype shows that the number and percentage of patients which the myeloid cells expressed cyMPO was 27(90) with mean percentage of positivity 59.38, while all patients expressed CD33 and CD13 on their blast cell 30(100) with a mean percentage of positivity 59.81 and 30.83 respectively.
{"title":"Candida spp Complications in Acute Myeloid Leukemia Patients in Erbil City","authors":"P. A. Hamsaeed, A. Muhammad","doi":"10.32441/kjps.02.02.p4","DOIUrl":"https://doi.org/10.32441/kjps.02.02.p4","url":null,"abstract":"This study has been carried out in Erbil City -Iraq, 30 patients were diagnosis by flow\u0000cytometry as AML which they were admitted to Nanakaly Hospital for Blood Disease and\u0000submitted to chemotherapy. Number of adults/children 22 (73.3%) / 8 (26.7%), female /\u0000male 13 (43.3%) / 17(56.7%). Only 20 (66.7%) patients were smoker. The highest number\u0000was subtyping M4 10 (33.3%) patients, followed by M1 7(23.3%), M3 6(20%), M2 were\u00003(10%) patients. M5 and M6 were 2 (6.7%). Ten candida spp isolates before induction phase\u0000chemotherapy show 9(90%) C.albicans, 1(10%) C. lusitaniae, and from 32 isolates after\u0000induction phase chemotherapy, 17(53.1%) C.albicans, 7(21.9%) C. lusitaniae, and 8(25%)\u0000C.famata. According to the site of infection, before starting chemotherapy 8(88.9%) C.\u0000albicans isolates were in the oral cavity and 1(11.1%) on the skin, while C. lusitaniae was 1 (100%) in oral cavity only. While after chemotherapy 12(70.6%) C.albicans in the oral\u0000cavity and 5(29.4%) on the skin, C. lusitaniae was 2 (28.6%) in the oral cavity and 5(71.4%) on the skin, while all C. famata was 8 (100%) on the skin\u0000The immunophenotype shows that the number and percentage of patients which the myeloid cells expressed cyMPO was 27(90) with mean percentage of positivity 59.38, while all patients expressed CD33 and CD13 on their blast cell 30(100) with a mean percentage of positivity 59.81 and 30.83 respectively.","PeriodicalId":7451,"journal":{"name":"Al-Kitab Journal for Pure Sciences","volume":"68 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85799173","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}
Cellular mobile communication technology has grown exponentially in the last decade resulting in large number of base stations in areas at which people are living or working. All over the world, the electromagnetic pollution produced from cellular base stations erected in residential areas and its effect on the environment and human body is a problem that has been concerning the society for many years. This paper, introduces the effects of electromagnetic energy emitted cellular base stations on the biological systems of the human body. The induced electromagnetic fields (EMF), and specific absorption rate (SAR) were calculated in close proximity to cellular mobile base stations. The calculated values of SAR were compared with the most commonly used international limits. The results show that the electromagnetic radiation (EMR) exposure levels at a distance of several meters from the base station towers can cause hazardous effects to the public.
{"title":"Environmental Pollution of Cellular Mobile Base Station\u0000in Populated Areas","authors":"Radhi Isa Sahan, Haider Easa, A. Sallomi","doi":"10.32441/kjps.02.02.p5","DOIUrl":"https://doi.org/10.32441/kjps.02.02.p5","url":null,"abstract":"Cellular mobile communication technology has grown exponentially in the last\u0000decade resulting in large number of base stations in areas at which people are living or\u0000working. All over the world, the electromagnetic pollution produced from cellular base\u0000stations erected in residential areas and its effect on the environment and human body is a problem that has been concerning the society for many years. This paper, introduces the effects of electromagnetic energy emitted cellular base stations on the biological systems of the human body. The induced electromagnetic fields (EMF), and specific absorption rate (SAR) were calculated in close proximity to cellular mobile base stations. The calculated values of SAR were compared with the most commonly used international limits. The results show that the electromagnetic radiation (EMR) exposure levels at a distance of several meters from the base station towers can cause hazardous effects to the public.","PeriodicalId":7451,"journal":{"name":"Al-Kitab Journal for Pure Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83018217","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}
{"title":"An Enhancement of Simultaneous Localization and Mapping Model Using Artificial Neural Networks","authors":"Musa A. Hameed","doi":"10.32441/kjps.02.02.p3","DOIUrl":"https://doi.org/10.32441/kjps.02.02.p3","url":null,"abstract":"","PeriodicalId":7451,"journal":{"name":"Al-Kitab Journal for Pure Sciences","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83955253","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}
Background and Objectives: Denture cleanser is the most widely used method by the patients to maintain clean and healthy dentures but the prolonged use of such cleansers may affect the properties of the denture. The present study was carried out to evaluate the effect of three prepared denture cleansers which were the 4% citric acid, 4% tartaric acid, and 4% oxalic acid in addition to the Protefix a commercially available denture cleansers, on some mechanical and physical properties (color stability, water sorption, and solubility) of acrylic resin (Stellon QC-20) and flexible nylon (Vaplast) denture base materials after immersion in tea solution. Methods: One hundred specimens (100) were prepared in two equal major groups: acrylic resin and Valplast. For each test of the physical and mechanical properties, 50 specimens were prepared, 25 from acrylic resin and 25 from Valplast. Later on, divided into five groups, one group used as a control and immersed in distilled water, and remaining 4 groups used as test groups; by immersing in one of the denture cleansers after staining in tea solutions for 10 days. The effect of denture cleansers on the properties was studied and compared with the control group. Results: Visual examination method showed no color changes for acrylic and slight color change for valplast specimens. Valplast specimens showed higher water sorption and solubility than acrylic. Conclusions: The findings showed that the 4 denture cleansers were equally effective, and did not cause significant alteration in the tested properties. Except acrylic specimens immersed in oxalic acid showed less color stability.
{"title":"The Effect of Denture Cleansers on Color Stability, Water Sorption and Solubility of Stained Denture Base Materials","authors":"Mahabad Saleh, S. Salem","doi":"10.32441/kjps.02.02.p11","DOIUrl":"https://doi.org/10.32441/kjps.02.02.p11","url":null,"abstract":"Background and Objectives: Denture cleanser is the most widely used method by the patients to maintain clean and healthy dentures but the prolonged use of such cleansers may affect the properties of the denture. The present study was carried out to evaluate the effect of three prepared denture cleansers which were the 4% citric acid, 4% tartaric acid, and 4% oxalic acid in addition to the Protefix a commercially available denture cleansers, on some mechanical and physical properties (color stability, water sorption, and solubility) of acrylic resin (Stellon QC-20) and flexible nylon (Vaplast) denture base materials after immersion in tea solution. Methods: One hundred specimens (100) were prepared in two equal major groups: acrylic resin and Valplast. For each test of the physical and mechanical properties, 50 specimens were prepared, 25 from acrylic resin and 25 from Valplast. Later on, divided into five groups, one group used as a control and immersed in distilled water, and remaining 4 groups used as test groups; by immersing in one of the denture cleansers after staining in tea solutions for 10 days. The effect of denture cleansers on the properties was studied and compared with the control group. Results: Visual examination method showed no color changes for acrylic and slight color change for valplast specimens. Valplast specimens showed higher water sorption and solubility than acrylic. Conclusions: The findings showed that the 4 denture cleansers were equally effective, and did not cause significant alteration in the tested properties. Except acrylic specimens immersed in oxalic acid showed less color stability.","PeriodicalId":7451,"journal":{"name":"Al-Kitab Journal for Pure Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88993350","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}
The necessity for stable DC voltage in both removable and non-removable systems has been considerably desired recently. These systems have to be implemented efficiently in order to be responding rapidly based voltage variations. Under this act, the efficient power can extend the lifetime of the employed batteries in such systems. The presented efficiency can be realized with respect to buck and boost components that were implemented to generate what is called positive Buck-Boost converter circuits. The main functions of the positive Buck-Boost converter are identified by announcing the unchanged situation of output voltage polarity and indicating the level of the voltage rationally between the input and the output. It is worth mention, the positive Buck-Boost converter circuit was simulated based Proteus software, and the hardware components were connected in reality. Finally, the microcontroller type that employed in the proposed system is PIC_16F877A, which realizes the input voltage sensitively to generate Pulse Width Modulation (PWM) signals in order to feed the employed MOSFET element.
{"title":"Efficient Performance Technical Selection of Positive\u0000Buck-Boost Converter","authors":"A. Abbas, Abadal-Salam Hussain","doi":"10.32441/kjps.02.02.p2","DOIUrl":"https://doi.org/10.32441/kjps.02.02.p2","url":null,"abstract":"The necessity for stable DC voltage in both removable and non-removable systems has been considerably desired recently. These systems have to be implemented efficiently in order to be responding rapidly based voltage variations. Under this act, the efficient power can extend the lifetime of the employed batteries in such systems. The presented efficiency can be realized with respect to buck and boost components that were implemented to generate what is called positive Buck-Boost converter circuits. The main functions of the positive Buck-Boost converter are identified by announcing the unchanged situation of output voltage polarity and indicating the level of the voltage rationally between the input and the output. It is worth mention, the positive Buck-Boost converter circuit was simulated based Proteus software, and the hardware components were connected in reality. Finally, the microcontroller type that employed in the proposed system is PIC_16F877A, which realizes the input voltage sensitively to generate Pulse Width Modulation (PWM) signals in order to feed the employed MOSFET element.","PeriodicalId":7451,"journal":{"name":"Al-Kitab Journal for Pure Sciences","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81193006","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}
The present work focuses on the upper Cretaceous (Cenomanian-early Campanian) carbonate successions in selected wells from northwestern Iraq. These successions are represented by Gir Bir (Cenomanian-early Turonian), Wajna (late Santonian) and Mushorah (early Campanian) Formations. The succession has affected by early burial near-surface, unconformity-related and deep burial diagenesis represented by cementation, neomorphism, dolomitization, dedolomitization, silicification, authigenesis of glauconite and pyrite, compaction, micritization, solution and porosity formation. The common porosity types are intergranular, fenestral, intercrystalline, moldic, vuggy, channel and fracture. Three porosity zones (I, II, and III) are identified depending on variation in gamma ray which reflects their shale content. The upper part of zone (II) is highly porous and regarded on the main reservoir unit in the middle and upper parts of the Gir Bir Formation. Fracture and moldic and vuggy dissolution features in addition to karstic and fissure features are responsible for the porosity increase in the fractured reservoir unit.
{"title":"Cenomanian-Early Campanian Carbonate Reservoir\u0000Rocks of Northwestern Iraq: Diagenesis and Porosity\u0000Development","authors":"M. Al-Haj, A. Al‐Juboury, A. Al-hadidy, D. Hassan","doi":"10.32441/kjps.02.02.p1","DOIUrl":"https://doi.org/10.32441/kjps.02.02.p1","url":null,"abstract":"The present work focuses on the upper Cretaceous (Cenomanian-early Campanian)\u0000carbonate successions in selected wells from northwestern Iraq. These successions are\u0000represented by Gir Bir (Cenomanian-early Turonian), Wajna (late Santonian) and Mushorah (early Campanian) Formations. The succession has affected by early burial near-surface, unconformity-related and deep burial diagenesis represented by cementation, neomorphism, dolomitization, dedolomitization, silicification, authigenesis of glauconite and pyrite, compaction, micritization, solution and porosity formation. The common porosity types are intergranular, fenestral, intercrystalline, moldic, vuggy, channel and fracture. Three porosity zones (I, II, and III) are identified depending on variation in gamma ray which reflects their shale content. The upper part of zone (II) is highly porous and regarded on the main reservoir unit in the middle and upper parts of the Gir Bir Formation. Fracture and moldic and vuggy dissolution features in addition to karstic and fissure features are responsible for the porosity increase in the fractured reservoir unit.","PeriodicalId":7451,"journal":{"name":"Al-Kitab Journal for Pure Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84785198","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}
Single phase bridge controlled rectifier, nonlinear load,, produces harmonics that effects on power quality of the AC power system. These distortions cause different problems that need to be solved. Therefore, reducing harmonics is very important issue. In this paper, line injection technique is used to reduce harmonics on the ac side of the single-phase bridge controlled and uncontrolled rectifier. This method depending on injecting harmonic components of the dc converter current with an opposite phase to its ac side lines at a particular frequency to get sinusoidal wave as possible and improving the power factor. Two injection circuits are used. The simulation results of the modified suggested circuits have been compared in order to show the advantages and disadvantages of each type. Parameters of the injection circuits are chosen depending on derived mathematical equations. The system is modeled implemented by Matlab/Simulink. Simulation results show that THD of the AC current reduced about 81% with power factor around unity.
{"title":"Modified Method for Minimizing Current Distortion of A Single Phase Bridge Rectifier Based on Current Injection","authors":"Aasef Saleh Al-hyali, Hussien Zynal, A. Mahmood","doi":"10.32441/KJPS.V2I1.141","DOIUrl":"https://doi.org/10.32441/KJPS.V2I1.141","url":null,"abstract":"Single phase bridge controlled rectifier, nonlinear load,, produces harmonics that effects on power quality of the AC power system. These distortions cause different problems that need to be solved. Therefore, reducing harmonics is very important issue. In this paper, line injection technique is used to reduce harmonics on the ac side of the single-phase bridge controlled and uncontrolled rectifier. This method depending on injecting harmonic components of the dc converter current with an opposite phase to its ac side lines at a particular frequency to get sinusoidal wave as possible and improving the power factor. Two injection circuits are used. The simulation results of the modified suggested circuits have been compared in order to show the advantages and disadvantages of each type. Parameters of the injection circuits are chosen depending on derived mathematical equations. The system is modeled implemented by Matlab/Simulink. Simulation results show that THD of the AC current reduced about 81% with power factor around unity.","PeriodicalId":7451,"journal":{"name":"Al-Kitab Journal for Pure Sciences","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75254034","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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