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Induction motors are, without any doubt, the most used in industry. Motor drive efficiency optimization is important for two reasons: economic saving and reduction of environmental pollution. In this paper, advantages of using fuzzy logic in steady-state efficiency optimization for induction motor drives are described. Experimental results of a fuzzy logic based optimum flux search controller are...
In this paper the effect of armature reaction and skewing on the performance of a 70 W, 24 V, 350-rpm surface mounted radial-flux permanent magnet brushless DC (PM BLDC) motor is presented. The net reduction in peak torque of the motor due the effect of armature reaction is only 2.8%. The rate of reduction in airgap flux density because of the armature reaction is 5.59 mT/A from no-load to full-load...
Accurate calculation of the core loss in a motor is essential for computing the actual efficiency. In a switched reluctance motor (SRM), the non-sinusoidal flux waveform with different frequencies of flux reversals in various parts of the motor makes the core loss calculation difficult. The conventional method for calculation of the core loss is based on the stator pole flux density variation in the...
In this paper, the performance analyses of the three phase induction motors have been done by finite element method (FEM) using time harmonic and transient with motion solvers. If there is no saturation in the ferrous portion of the mutual-flux path, the flux wave in the motor approaches a sine-wave shape, but some amount of saturation always exists in a typical three phase induction motor that has...
During the past few decades, the numerical computation of magnetic fields has gradually become a standard in electrical machine design. Finite element method (FEM) has the advantage over previous design calculation procedures in that geometric variations and irregularities, saturation and eddy current effects can be modeled with a high degree of accuracy. Besides these advantages, the method does...
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