'n Ondersoek na die elektromagnetiese verbetering van die induksiesmelting van metale
- Authors: Dorland, Pieter
- Date: 2014-05-29
- Subjects: Induction heating , Induction furnaces , Electromagnetic induction , Electromagnetism
- Type: Thesis
- Identifier: uj:11247 , http://hdl.handle.net/10210/10840
- Description: M.Ing. (Electrical And Electronic Engineering) , The metals manufacturing industry is the link between the mining industry, where the ore is mined, and the manufacturing industries, where metals are utilized to create a wide range of products. Melting processes.are used in the manufacturing of metals from the ore, of which induction melting is one of the possible melting processes. In this study the improvement of induction melting of metals is investigated. A new topology for an induction melting furnace is proposed, and this topology is thoroughly investigated. The induction melting process is influenced by certain user-controlled variables as well as the electromagnetic layout of the furnace. In this study, the influence of these variables on the performance of the furnace are investigated through finite element simulations and insight is also gained into the influence of the electromagnetic layout of the system. An experimental induction melting furnace is described in this study, investigated and compared to the predictions from the simulations. Improvements from structural, thermal and measuring viewpoints are also investigated and implemented.
- Full Text:
- Authors: Dorland, Pieter
- Date: 2014-05-29
- Subjects: Induction heating , Induction furnaces , Electromagnetic induction , Electromagnetism
- Type: Thesis
- Identifier: uj:11247 , http://hdl.handle.net/10210/10840
- Description: M.Ing. (Electrical And Electronic Engineering) , The metals manufacturing industry is the link between the mining industry, where the ore is mined, and the manufacturing industries, where metals are utilized to create a wide range of products. Melting processes.are used in the manufacturing of metals from the ore, of which induction melting is one of the possible melting processes. In this study the improvement of induction melting of metals is investigated. A new topology for an induction melting furnace is proposed, and this topology is thoroughly investigated. The induction melting process is influenced by certain user-controlled variables as well as the electromagnetic layout of the furnace. In this study, the influence of these variables on the performance of the furnace are investigated through finite element simulations and insight is also gained into the influence of the electromagnetic layout of the system. An experimental induction melting furnace is described in this study, investigated and compared to the predictions from the simulations. Improvements from structural, thermal and measuring viewpoints are also investigated and implemented.
- Full Text:
Controlled capacitance injection into a three-phase induction motor through a single-phase auxiliary stator winding
- Jimoh, A. A., Nicolae, Dan-Valentin
- Authors: Jimoh, A. A. , Nicolae, Dan-Valentin
- Date: 2007
- Subjects: Fusion power plants , Electromagnetic induction , Reactor fuel reprocessing
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/18755 , uj:16039 , Citation: Jimoh, A.A. & Nicolae, D.V. 2007. Controlled capacitance injection into a three-phase induction motor through a single-phase auxiliary stator winding.IEEE International Electric Machines and Drives Conference, Antalya, Turkey, May 03-05, 2007:1183-1188. DOI:10.1109/IEMDC.2007.383598
- Description: Abstact: In this paper a controlled static switched capacitor three-phase auxiliary winding fed by a three-phase PWM with single-phase auxiliary winding, which is only magnetically inverter is proposed with some positive results. This solution coupled to the stator main winding, is explored for improving the is, however, complex and there are some doubts about the starting and operating power factor of a three-phase induction controller presented. Other solution presented in [7, 8] is motor. The scheme improves the power factor of the motor applicable only to a wound rotor machine, as the rotor is without compromising significantly on other performances. Important advantages of the scheme include preventing required to be connected to an external circuit. harmonics in the line current, and eliminating regeneration In this paper a single-phase stator auxiliary winding that is possibility as well as preventing high inrush currents at starting
- Full Text:
- Authors: Jimoh, A. A. , Nicolae, Dan-Valentin
- Date: 2007
- Subjects: Fusion power plants , Electromagnetic induction , Reactor fuel reprocessing
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/18755 , uj:16039 , Citation: Jimoh, A.A. & Nicolae, D.V. 2007. Controlled capacitance injection into a three-phase induction motor through a single-phase auxiliary stator winding.IEEE International Electric Machines and Drives Conference, Antalya, Turkey, May 03-05, 2007:1183-1188. DOI:10.1109/IEMDC.2007.383598
- Description: Abstact: In this paper a controlled static switched capacitor three-phase auxiliary winding fed by a three-phase PWM with single-phase auxiliary winding, which is only magnetically inverter is proposed with some positive results. This solution coupled to the stator main winding, is explored for improving the is, however, complex and there are some doubts about the starting and operating power factor of a three-phase induction controller presented. Other solution presented in [7, 8] is motor. The scheme improves the power factor of the motor applicable only to a wound rotor machine, as the rotor is without compromising significantly on other performances. Important advantages of the scheme include preventing required to be connected to an external circuit. harmonics in the line current, and eliminating regeneration In this paper a single-phase stator auxiliary winding that is possibility as well as preventing high inrush currents at starting
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