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Advanced technique for induction motor performance improvement
Faculty
Engineering
Year:
2007
Type of Publication:
Theses
Pages:
181
Authors:
Sameh Ibrahim Selem Abdallah
BibID
10673117
Keywords :
Electric Motor
Abstract:
Three phase induction motors are the most used motors as they present80% among electric motors used in industrial application. That is becauseinduction motors enjoy various advantages like simplicity, ruggedness,low cost, reliability, compactness and ease of maintenance.Despite their benefits, induction motors have one major drawback,which is that their speed is determined by the frequency of the supply,and varies with torque variation. In some applications, it is required todrive the motor with constant speed. To overcome this problem, variousspeed control strategies have been formulated for the induction machine,depending upon how the voltage-to-frequency ratio is implemented.These methods work effectively within specific range of torque variation,and not work effectively elsewhere.To overcome this problem, Field Oriented Control, also calledvector control has been used in control of induction motor. It increasetorque per ampere ratio by maintaining the angle between stator field androtor field 900 at any load torque, which reduce the motor current andincrease efficiency and output power.Steady state characteristics of the motor under study have been presented. including:Steady state starting characteristics of the motor that showthe variation of motor characteristic with speed variationfrom starting to reach synchronous speed.
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Sameh Ibrahim Selem Abdallah, "Advanced technique for induction motor performance improvement", 2007
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