 Home
 Products
 Integration
 Tutorial
 Barcode FAQ
 Purchase
 Company
barcode reader in asp.net codeproject (Wbturns) Coenergy Field energy Wm W'm in Software
(Wbturns) Coenergy Field energy Wm W'm Scan QR In None Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications. QR Drawer In None Using Barcode creator for Software Control to generate, create Denso QR Bar Code image in Software applications. i (A) Recognizing Denso QR Bar Code In None Using Barcode decoder for Software Control to read, scan read, scan image in Software applications. Painting QR Code ISO/IEC18004 In C#.NET Using Barcode encoder for Visual Studio .NET Control to generate, create QR Code image in VS .NET applications. However, in this case, the voltage corresponds to the induced emf, according to Faraday s law: e= d d =N dt dt (1616) Making QR Code JIS X 0510 In .NET Using Barcode creation for ASP.NET Control to generate, create QR image in ASP.NET applications. Making QR In .NET Using Barcode drawer for VS .NET Control to generate, create QR image in Visual Studio .NET applications. Figure 168 Relationship between ux linkage, current, energy, and coenergy
Encoding QR In VB.NET Using Barcode generator for VS .NET Control to generate, create QR image in Visual Studio .NET applications. Make GS1  13 In None Using Barcode creator for Software Control to generate, create GS1  13 image in Software applications. 16
GTIN  128 Encoder In None Using Barcode encoder for Software Control to generate, create USS128 image in Software applications. Code 128 Code Set A Generation In None Using Barcode encoder for Software Control to generate, create Code128 image in Software applications. Principles of Electromechanics
Generating Bar Code In None Using Barcode generator for Software Control to generate, create barcode image in Software applications. Making Bar Code In None Using Barcode encoder for Software Control to generate, create barcode image in Software applications. and is therefore related to the rate of change of the magnetic ux The energy stored in the magnetic eld could therefore be expressed in terms of the current by the integral Wm = ei dt = d i dt = dt i d (1617) Print Identcode In None Using Barcode creation for Software Control to generate, create Identcode image in Software applications. Generate Linear In .NET Framework Using Barcode creator for ASP.NET Control to generate, create 1D Barcode image in ASP.NET applications. It should be straightforward to recognize that this energy is equal to the area above the i curve of Figure 168 From the same gure, it is also possible to de ne a ctitious (but sometimes useful) quantity called coenergy, equal to the area under the curve and identi ed by the symbol Wm From the gure, it is also possible to see that the coenergy can be expressed in terms of the stored energy by means of the following relationship: Wm = i Wm (1618) Make UPC Code In Visual Basic .NET Using Barcode creation for Visual Studio .NET Control to generate, create UCC  12 image in Visual Studio .NET applications. GS1 DataBar Stacked Creation In Visual Studio .NET Using Barcode drawer for .NET Control to generate, create GS1 DataBar14 image in Visual Studio .NET applications. Example 161 illustrates the calculation of energy, coenergy, and induced voltage using the concepts developed in these paragraphs The calculation of the energy stored in the magnetic eld around a magnetic structure will be particularly useful later in the chapter, when the discussion turns to practical electromechanical transducers and it will be necessary to actually compute the forces generated in magnetic structures Encode Code 3 Of 9 In Java Using Barcode creation for Android Control to generate, create Code 3/9 image in Android applications. Barcode Generator In None Using Barcode creation for Font Control to generate, create bar code image in Font applications. EXAMPLE 161 Energy and CoEnergy Calculation for an Inductor
Printing Data Matrix ECC200 In Java Using Barcode maker for Android Control to generate, create Data Matrix 2d barcode image in Android applications. Decode EAN 13 In .NET Using Barcode reader for .NET Control to read, scan read, scan image in .NET framework applications. Problem
Compute the energy, coenergy, and incremental linear inductance for an iron core inductor with a given i relationship Also compute the voltage across the terminals given the current through the coil Solution
Known Quantities: i relationship; nominal value of ; coil resistance; coil current Find: Wm ; Wm ; L ; v Schematics, Diagrams, Circuits, and Given Data: i = + 05 2 ; 0 = 05 V s; ; i(t) = 0625 + 001 sin(400t) Assumptions: Assume that the magnetic equation can be linearized and use the linear model in all circuit calculations Analysis: Calculation of energy and coenergy From equation 1617, we calculate the energy as follows
Wm =
i( )d =
3 2 + 2 6 The above expression is valid in general; in our case, the inductor is operating at a nominal ux linkage 0 = 05 Vs and we can therefore evaluate the energy to be: Wm ( = 0 ) = 3 2 + 2 6 = 01458 J =05 Part III
Electromechanics
Thus, after equation 1618, the coenergy is given by: Wm = i Wm where i = + 05 2 = 0625 A and Wm = i Wm = (0625)(05) (01458) = 01667 J 2 Calculation of incremental inductance If we know the nominal value of ux linkage (ie, the operating point), we can calculate a linear inductance L , valid around values of close to the operating point 0 : L = d di = = 0 1 1+ = 0667 H =05 The above expressions can be used to analyze the circuit behavior of the inductor when the ux linkage is around 05 V s, or, equivalently, when the current through the inductor is around 0625 A Circuit analysis using linearized model of inductor We can use the incremental linear inductance calculated above to compute the voltage across the inductor in the presence of a current i(t) = 0625 + 001 sin(400t) Using the basic circuit de nition of an inductor with series resistance R, the voltage across the inductor is given by: v = iR + L di = [0625 + 001 sin(400t)] 1 + 0667 4 cos(400t) dt = 0625 + 001 sin(400t) + 2668 cos(400t) = 0625 + 2668 sin(400t + 898 ) Comments: The linear approximation in this case is not a bad one: the small sinusoidal
current is oscillating around a much larger average current In this type of situation, it is reasonable to assume that the inductor behaves linearly This example explains why the linear inductor model introduced in 4 is an acceptable approximation in most circuit analysis problems ` Ampere s Law As explained in the previous section, Faraday s law is one of two fundamental laws relating electricity to magnetism The second relationship, which forms a counterpart to Faraday s law, is Amp` re s law Qualitatively, Amp` re s law states e e that the magnetic eld intensity, H, in the vicinity of a conductor is related to the current carried by the conductor; thus Amp` re s law establishes a dual relationship e with Faraday s law In the previous section, we described the magnetic eld in terms of its ux density, B, and ux To explain Amp` re s law and the behavior of magnetic e materials, we need to de ne a relationship between the magnetic eld intensity, H, and the ux density, B These quantities are related by: B = H = r 0 H Wb/m2 or T (1619) where the parameter is a scalar constant for a particular physical medium (at least, for the applications we consider here) and is called the permeability of the medium The permeability of a material can be factored as the product of the

