Download A Computer-Based Approach Digital Signal Processing by Sanjit Mitra PDF

By Sanjit Mitra

«Digital sign Processing: A Computer-Based process» is meant for a two-semester path on electronic sign processing for seniors or first-year graduate scholars. in response to person suggestions, a couple of new issues were extra to the second one variation, whereas a few extra themes from the 1st variation were got rid of. the writer has taken nice care to prepare the chapters extra logically by way of reordering the sections inside chapters. extra worked-out examples have additionally been integrated. The ebook includes greater than 500 difficulties and one hundred fifty MATLAB routines.

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Example text

25 SPICE 2 syntax saturable core model under sine-wave excitation. 9) where E is the desired voltage, N is the number of turns, and ϕ is the flux of the core in Maxwell’s equation. 10) Then, from Eqs. 12) and where Bm is the flux density of the material in gauss, Ac is the effective core cross-sectional area in cm2 , and F is the design frequency. 11) is for sinusoidal conditions, while Eq. 12) is for a square-wave input. 14) The initial flux in the core is described by the parameter IVSEC. TRAN” statement.

17 gives an example of a four-winding mesh transformer that might be used in a polyphase power system. The reluctance modeling proceeds as shown previously and results in the model given in Fig. 17C. Note how different this model is from an equivalent four-winding junction transformer. Instead of cascaded parallel windings, the windings are in series. This is because mesh and junction transformers are topological duals. Integrated magnetic structures that incorporate transformers and inductors into a common structure are becoming more common.

Each element in the network is now multiplied by N, as shown in Fig. 11D. The resulting network is now in terms of the winding voltage and the permeances scaled by N 2 . From Eq. 8), we know that L = N 2 P, so that the scaled permeances can be replaced by inductances (as shown in Fig. 11E and F). We can now apply this process to a two-winding transformer like that shown in Fig. 12. The reluctance model, which is shown in Fig. 13 V1 L12 N1 V2 N2 (D) Reluctance model for a two-winding transformer.

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