The key intermediate for the oxidative dearomatization of phenols by phenyliodine(iii) diacetate (PIDA) was found to be a dearomatized phenolate species.
SUMMARYIn the present paper, a core loss model for switched reluctance motor (SRM) is developed using ANSYS finite element package. In this model, the flux waveform in one part of the magnetic circuit of the motor is predicted by analysis of the motor with finite element method (FEM), and then the flux waveforms in other sections of the motor are determined using this predicted flux waveform. To validate the obtained flux waveforms, they are compared with those predicted solely by analysis of the motor with FEM. Since the flux waveforms are completely non-sinusoidal, three different methods based on the Steinmetz equation are utilized to estimate the core loss, and the estimated loss are compared with measured data. For the measurement, an experimental set-up is introduced and various aspects of the core loss measurement of SRM are discussed.
Because of similar structure and operation principles, the linear switched reluctance motor (LSRM) has all advantages of rotary switched reluctance motor. Also, segmental translator LSRM (STLSRM) has the capability to produce higher output power/weight when it is compared with the conventional LSRM. Due to the high advantages of the STLSRM, electromagnetic modelling of this motor is considered in this study. By the direct solution of the field equations, an analytical model is introduced for the STLSRM by which the static characteristic of flux-linkage with a phase for various phase currents and different translator positions is determined. Having this static characteristic, dynamic analysis of the motor is then carried out based on the phase voltage equation to predict the phase current and instantaneous thrust waveforms. Due to the high speed of the developed model, it can be utilised appropriately for the initial sizing of the machine where accuracy can be traded with time-saving. Applying the proposed analytical model to a typical three-phase STLSRM, simulation results are presented and they are validated using the finite element (FE) calculations.
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