.../methodology/approach Fast Fourier transform is used to obtain fault sideband amplitudes under varying number of BRBs and load torque for 5.5 kW, 7.5 kW, 10 kW, three-phase, 415 V, 50 Hz SCIMs in MATLAB/Simulink. The nature of variation is decided by an appropriate curve fitting technique for comprehending...

.... Findings The extraction of the leading term in the Fourier–Bessel series requires the solution of a differential equation by means of a Fourier transform. This yields a natural way to de-convolute the measured distribution of the multipole content. The author has shown that the measurement technique...

... domain is assembled based on Fourier transforms of the Jacobian matrix in the time domain. A three-phase transformer is simulated to verify this method and to examine the multi-harmonic coupling. Findings A fast method to calculate the linearization of non-trivial material models in the frequency...

... frequency bandwidth, avoiding confusions with other components and false interpretations. Dr Rosario Miceli can be contacted at: rosario.miceli@unipa.it © Emerald Group Publishing Limited 2014 Electrical machines Fault analysis Condition monitoring Fourier transforms Rotating machines...

... ordinary calculus in proving fundamental signal theoretic results. On that basis, concepts of limit, Fourier transform and derivative are revisited in the spirit of functional analysis. A new useful formula for weak limit computation is proved. Originality/value Functional analysis is efficiently used...

...‐eighth of the whole domain due to the symmetry. Eddy currents Fourier transforms Numerical analysis A method has been presented in Koczka et al. (2009a, b) , Außerhofer et al. (2007) and Ciric and Hantila (2007) for solving non‐linear eddy current problems under...

... Flux Fourier transforms Neural nets Electric machines For the highly dynamical behavior of the induction machine operated under any kind of field‐oriented control (FOC), a position sensor (encoder) is needed. Research was placed on omitting this sensor using fundamental machine models...

... Y_i=DF_i(x_k^{(s)), DF(i}=0,1, … ,n−1). is the i‐th term in the discrete Fourier transform, namely: Equation 13 The convergence speed of both procedures depends on the contraction number q, which is estimated in Koczka...

... fourier transform (STFT) and S‐transform algorithms were applied to analyze non‐stationary signals originating from switching of capacitor banks in a power system. Findings The S‐transform showed possibilities of sharp localization of the basic component, and allowed improvement of tracking dynamism...

... (PBG) structures in stratified medium Design/methodology/approach A nu‐PSTD method is proposed in solving the Maxwell's equations numerically. It expands the temporal derivatives using the finite differences, while it adopts the Fourier transform (FT) properties to expand the spatial derivatives...

...‐dimensional (2D) finite element model and decomposed into the double Fourier series through the 2D fast Fourier transform (FFT). The real trigonometric form of the Fourier series is used for the purpose to identify those space and time harmonics of magnetic flux density whose involvement in the cogging torque...