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[9000469.] رقم البحث : 9000469 - |
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Fault Tolerant Of Three-Phase Inverter Fed Speed Sensorless Induction Motor Drive System / |
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قطاع الدراسات الهندسية / الهندسه الكهربائيه |
| تخصص البحث : الهندسه الكهربائيه |
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Engineering Research Journal \ / Vol. 36, No. 3 - July 2013 |
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زكى محمد البربرى |
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Induction motor drive, Current control Voltage source inverter (CCVSI), Fault tolerant, four-switch three phase inverter (FSTPI).Insulated Gate Bipolar Transistor (IGBT).; |
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This paper proposes an algorithm for fault tolerance of three-phase inverter fed speed sensorless control of three- phase induction motor drive system. The fault tolerance of inverter when one switch is open or one leg of six-switch inverter is lost is considered. The control of the drive system is based on indirect rotor field oriented control theory. Also, the speed estimator is based on model reference adaptive system (using stator current and rotor flux as state variables for estimating the speed). The fault tolerant algorithm is able to adaptively change-over from six switch inverter to four switch inverter topologies when the fault is occurred; also, it makes a smooth transition of the motor speed, torque and current when changing over from faulty condition to new healthy status which is (Four-Switch Three-Phase Inverter (FSTPI) topology), thus, the Six Switch Three-Phase Inverter (SSTPI) topology (pre-fault status) almostly retained. The proposed algorithm is simulated by using the MATLAB/SIMULINK package. The obtained results from the simulation model demonstrate the performance enhancement and good validity of the fault-tolerance control for speed sensorless induction motor drive system. |
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