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In this paper, a new analytical methodology is proposed to estimate core losses in line-start and inverter-fed induction motors under rotor broken bars. This methodology can be utilized for different supply and load conditions. Core losses are precisely calculated taking into account the effects of nonsinusoidal distribution of the magnetic flux density due to bars breakage. Furthermore, increase...
This paper presents no-load core loss analysis of 3-phase energy-saving small size induction motor supplied by sinusoidal voltage. In field-circuit part the distribution and changes of magnetic flux densities of the motor are computed by using time-stepping FEM. Discrete Fourier Transform is used to analyze the magnetic flux density waveforms in each element of the motor model. Rotational aspect of...
Taking core loss into account has import effect to improving the torque performance of direct field oriented control for induction motors. In this paper, the transient mathematical model of induction motor with core loss is proposed. The method is presented to minimize the loss in a variable speed and torque at the rotating coordinate, and simulated results show that the efficiency is improved evidently...
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