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qr code vb.net library Magnetic Coupling. Transformers in .NET framework
CHAPTER 10 Magnetic Coupling. Transformers Decoding ANSI/AIM Code 128 In .NET Framework Using Barcode Control SDK for VS .NET Control to generate, create, read, scan barcode image in .NET framework applications. Code 128 Code Set B Drawer In VS .NET Using Barcode maker for .NET Control to generate, create Code 128B image in Visual Studio .NET applications. Fig. 242
Code 128C Reader In Visual Studio .NET Using Barcode decoder for .NET Control to read, scan read, scan image in .NET applications. Painting Bar Code In .NET Using Barcode generator for .NET Control to generate, create bar code image in .NET applications. Fig. 243. Schematic symbol for Fig. 242.
Bar Code Recognizer In Visual Studio .NET Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications. Code 128A Encoder In Visual C# Using Barcode printer for .NET framework Control to generate, create Code 128 image in .NET applications. With these points in mind, the IDEAL IRONCORE TRANSFORMER is de ned as a theoretical transformer having the following characteristics. ZERO ENERGY LOSSES, which means that the primary and secondary coils have zero resistance, and no energy loss in the iron core. (b) UNITY p p COEFFICIENT OF COUPLING, that is, k 1; hence, M k L1 L2 L1 L2 . (c) The inductive reactances X1 and X2 of the primary and secondary coils are in nitely great in value, but, for any given transformer, the RATIO of X1 to X2 is a constant nite number a; thus a X1 =X2 " Now let a nite load impedance of ZL R jX ohms be connected to the output terminals of an ideal transformer, as in Fig. 244. (a) Code 128 Code Set A Drawer In .NET Using Barcode generation for ASP.NET Control to generate, create Code 128B image in ASP.NET applications. Code 128 Code Set C Printer In VB.NET Using Barcode creation for .NET Control to generate, create Code128 image in .NET framework applications. Fig. 244
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Barcode Drawer In Java Using Barcode generation for Java Control to generate, create bar code image in Java applications. Encoding Code 3 Of 9 In None Using Barcode creation for Office Word Control to generate, create Code39 image in Word applications. CHAPTER 10 Magnetic Coupling. Transformers
EAN13 Generator In .NET Framework Using Barcode printer for ASP.NET Control to generate, create EAN13 image in ASP.NET applications. Recognize Bar Code In Java Using Barcode Control SDK for Eclipse BIRT Control to generate, create, read, scan barcode image in Eclipse BIRT applications. Now, upon rationalizing and collecting like terms, you should nd that the above relationship becomes " # " # 2 2 X2 R2 X2 XX2 X 2 X2 " Zin aR ja 416 R2 X2 X 2 R2 X2 X 2 Now, in accordance with condition (C), we allow X2 to become in nitely great in value. Doing this, and holding everything else constant, notice that both the real and imaginary parts of eq. (416) take the form in nity over in nity, 1=1. Since in nitely great is not a speci c value, 1=1 is said to be an indeterminant form. This, however, does not mean that a de nite, speci c answer can never be found in such a case. If an answer does exist, it can sometimes be found by rst merely changing the form of the given expression and then allowing the variable to become in nitely great. This is true for the case of eq. (416) as follows. 2 First divide the numerators and denominators in both of the fractions by X2 . Doing this, and noting that, algebraically, Decoding Barcode In Java Using Barcode Control SDK for Java Control to generate, create, read, scan barcode image in Java applications. GS1 128 Drawer In Java Using Barcode generation for Java Control to generate, create GTIN  128 image in Java applications. 2 X2 X 2 =X2 1 X=X2 2
Generating Data Matrix 2d Barcode In None Using Barcode creation for Software Control to generate, create Data Matrix 2d barcode image in Software applications. Making Code 39 Extended In Java Using Barcode creator for Eclipse BIRT Control to generate, create Code39 image in Eclipse BIRT applications. eq. (416) becomes
" Zin aR
2 R2 =X2 1 X=X2 2
# ja
R2 =X2 X X 2 =X2
2 R2 =X2 1 X=X2 2
Now let X2 become in nitely great, X2 ! 1. When this happens, note that 1=X2 approaches the value zero, that is, when X2 ! 1; then 1=X2 ! 0 and therefore (remembering that R and X, in Fig. 244, have only nite values) we see that, " for the IDEAL CASE of in nitely great X2 , Zin becomes equal to " " Zin a R jX aZL 417 Since a is a real number, eq. (417) shows that the ideal transformer is an impedancematching device that changes only the MAGNITUDE of the load impedance; that is, the " " phase angle of Zin is the same as the phase angle of ZL . While it s impossible, of course, to build a true ideal transformer, a welldesigned ironcore transformer will come very close to being ideal at low frequencies. For example, a highquality audio transformer, designed for use in the ampli er of a high delity sound system, may well have both an e ciency and a coe cient of coupling in excess of 99%. So, in many cases an actual transformer can be considered to be ideal, for practical engineering purposes. Let s continue now, rst with a brief mention of what is called the magnetizing current of an ironcore transformer. In doing this, we ll refer to Fig. 244 and assume that, for practical purposes, the transformer can be considered to be ideal. As we have seen, this means that the values of the reactances X1 and X2 must be very great. Since the primary and secondary coils are to have only relatively small numbers of turns of wire, this means that, to satisfy the requirement of large values of X1 and X2 , the iron core must possess a very high value of relative permeability.* * Consider a coil of N turns. If Liron is the inductance of the coil with an iron core and Lair is the inductance with air as core, we ll de ne relative permeability of iron to air to be the ratio of Liron to Lair . This ratio can be in the order of 1000 to 1 for silicon steel. Thus, for a given number of N turns, the reactance of an ironcore coil could be 1000 times the reactance of the corresponding aircore coil.

