 Home
 Products
 Integration
 Tutorial
 Barcode FAQ
 Purchase
 Company
vb.net barcode reader code Figure P636 in Software
Figure P636 Read QRCode In None Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications. Make Denso QR Bar Code In None Using Barcode creation for Software Control to generate, create QR image in Software applications. Part I
QR Reader In None Using Barcode reader for Software Control to read, scan read, scan image in Software applications. Generate QR In C#.NET Using Barcode creation for .NET Control to generate, create QR Code 2d barcode image in .NET framework applications. Circuits
QR Code JIS X 0510 Encoder In .NET Framework Using Barcode creator for ASP.NET Control to generate, create QR Code ISO/IEC18004 image in ASP.NET applications. Generating Quick Response Code In .NET Framework Using Barcode maker for .NET framework Control to generate, create QR Code image in .NET applications. b If C1 = C2 = C, RL = RS = 600 , and 1/ LC = R/L = 1/RC = 2,000 , plot Vo (j )/VS (j ) in dB versus frequency (logarithmic scale) in the range 100 Hz f 10,000 Hz Generating QR Code In Visual Basic .NET Using Barcode generation for .NET framework Control to generate, create QRCode image in .NET applications. Bar Code Drawer In None Using Barcode generator for Software Control to generate, create bar code image in Software applications. 640 The T lter of the circuit of Figure P640 is a
Making Data Matrix ECC200 In None Using Barcode creation for Software Control to generate, create Data Matrix 2d barcode image in Software applications. Print Bar Code In None Using Barcode creation for Software Control to generate, create barcode image in Software applications. lowpass lter that may be used to pass signals to the woofer portion of a speaker a Find the frequency response Vo (j )/VS (j ) b If L1 = L2 = L, RS = RL = 600 , and 1/ LC = R/L = 1/RC = 2,000 , plot Vo (j )/VS (j ) in dB versus frequency (logarithmic scale) in the range 100 Hz f 10,000 Hz Generate Universal Product Code Version A In None Using Barcode generation for Software Control to generate, create UPCA Supplement 5 image in Software applications. EAN13 Generator In None Using Barcode encoder for Software Control to generate, create EAN13 image in Software applications. Tweeter Amplifier Woofer
GTIN  14 Creator In None Using Barcode generation for Software Control to generate, create EAN / UCC  14 image in Software applications. Recognizing ECC200 In C#.NET Using Barcode scanner for .NET Control to read, scan read, scan image in .NET applications. Speaker
Decoding Bar Code In .NET Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in .NET applications. European Article Number 13 Encoder In Java Using Barcode generator for Java Control to generate, create GS1  13 image in Java applications. L2 +
Generate Code 128 In C#.NET Using Barcode generator for .NET Control to generate, create Code 128 Code Set C image in Visual Studio .NET applications. Making Bar Code In VS .NET Using Barcode maker for VS .NET Control to generate, create bar code image in Visual Studio .NET applications. vS(t) ~ Ra C1 C2 + vS(t) ~ L RL vO(t) Crossover filter
Drawing USS128 In .NET Using Barcode creation for Reporting Service Control to generate, create GS1128 image in Reporting Service applications. UPCA Generation In None Using Barcode generator for Excel Control to generate, create UPC A image in Microsoft Excel applications. vO(t) Figure P640
Figure P639
AC Power
he aim of this chapter is to introduce the student to simple AC power calculations, and to the generation and distribution of electric power The chapter builds on the material developed in 4 namely, phasors and complex impedance and paves the way for the material on electric machines in s 16, 17, and 18 The chapter starts with the de nition of AC average and complex power and illustrates the computation of the power absorbed by a complex load; special attention is paid to the calculation of the power factor, and to power factor correction The next subject is a brief discussion of ideal transformers and of maximum power transfer This is followed by an introduction to threephase power The chapter ends with a discussion of electric power generation and distribution Upon completing this chapter, you should have mastered the following basic concepts: Calculation of real and reactive power for a complex load Operation of ideal transformers Impedance matching and maximum power transfer Basic notions of residential circuit wiring, including grounding and safety Con guration of electric power distribution networks 7
AC Power
POWER IN AC CIRCUITS
The objective of this section is to introduce the notion of AC power As already mentioned in 4, 50 or 60Hz AC power constitutes the most common form of electric power; in this section, the phasor notation developed in 4 will be employed to analyze the power absorbed by both resistive and complex loads Instantaneous and Average Power From 4, you already know that when a linear electric circuit is excited by a sinusoidal source, all voltages and currents in the circuit are also sinusoids of the same frequency as that of the excitation source Figure 71 depicts the general form of a linear AC circuit The most general expressions for the voltage and current delivered to an arbitrary load are as follows: v(t) = V cos( t V ) i(t) = I cos( t I ) (71) i(t) v(t) + ~
AC circuit v(t) = V cos( t uV) i(t) = I cos( t uI) I = Ie ju V = Ve juV
+ ~
Z= e j(u) where V and I are the peak amplitudes of the sinusoidal voltage and current, respectively, and V and I are their phase angles Two such waveforms are plotted in Figure 72, with unit amplitude and with phase angles V = /6 and I = /3 From here on, let us assume that the reference phase angle of the voltage source, V , is zero, and let I = Voltage waveforms for unity amplitude, zero deg voltage phase angle and 60 deg current phase angle Voltage Current 1 AC circuit in phasor form 08 06
Figure 71 Circuit for illustration of AC power
Volts, amps
04 02 0 02 04 06 08 1 0 001 002 003 004 005 006 007 008 009 Time (s) 01 Figure 72 Current and voltage waveforms for illustration of AC power
Since the instantaneous power dissipated by a circuit element is given by the product of the instantaneous voltage and current, it is possible to obtain a general expression for the power dissipated by an AC circuit element: p(t) = v(t)i(t) = V I cos( t) cos( t ) (72) Part I
Circuits
Equation 72 can be further simpli ed with the aid of trigonometric identities to yield VI VI (73) cos( ) + cos(2 t ) 2 2 where is the difference in phase between voltage and current Equation 73 illustrates how the instantaneous power dissipated by an AC circuit element is equal to the sum of an average component, 1 V I cos( ), plus a sinusoidal component, 2 1 V I cos(2 t ), oscillating at a frequency double that of the original source 2 frequency The instantaneous and average power are plotted in Figure 73 for the signals of Figure 72 The average power corresponding to the voltage and current signals of equation 71 can be obtained by integrating the instantaneous power over one cycle of the sinusoidal signal Let T = 2 / represent one cycle of the sinusoidal signals Then the average power, Pav , is given by the integral of the instantaneous power, p(t), over one cycle: p(t) = Pav = 1 T

