electromagnetic wave electromagnetic phenomenon

... product s ˆ 3.1 Plane Harmonic Wave: An important specific case of electromagnetic waves is the plane harmonic wave in which E and B have the following form: 4/8/2008 23 The resonance phenomenon in LCR circuits ... oscillating currents and voltages. They are sources for electromagnetic fields 4/8/2008 43 3.4 Energy and momentum in electromagnetic waves:  Electromagnetic waves contain energy. We already know expressions ... other and form a system of electromagnetic fields.  Electromagnetic fields can propagate in the space (vacuum or material environment). We call them electromagnetic waves. They play a very important...

Ngày tải lên: 21/12/2013, 03:15

Ngày tải lên: 12/10/2012, 15:00

Ngày tải lên: 17/10/2013, 17:15

... Nghiệm phương trình sóng đối với sóng phẳng 3.1.1. Sóng phẳng đồng nhất TEM (transverse electromagnetic wave) - Nế u trong mặt đồng pha của sóng điện từ có biên độ của E r và H r bằng nhau...

Ngày tải lên: 20/10/2013, 05:15

Ngày tải lên: 20/10/2013, 05:15

Ngày tải lên: 24/10/2013, 04:15

... include the complete electromagnetic data at each sensor have been introduced. Furthermore, new signal models and vector angular error models in the wave frame have been proposed. The wave frame model ... measures and the associated bounds. Their application is not limited to electromagnetic vector sensor processing. We comment that electromagnetic vector sensors as measuring devices are commercially ... article it will be assumed that the wave is traveling in a nonconductive, homo- geneous, and isotropic medium. Additionally, the following will be assumed: A1: Plane wave at the sensor: This is equivalent...

Ngày tải lên: 08/11/2013, 12:15

... as electric field lines) dS B B   SdBΦ B  3/18/2008 17  Why does the magnet hover ? This phenomenon can not be explained by Faraday’s law. It is a property called the Meissner effect. It ... current source. – After a long time, the inductor behaves like an open switch. 3/18/2008 2 CHAPTER XI Electromagnetic Induction §1. Induction experiment - Faraday’s and Lenz’s laws §2. Induced electromotive...

Ngày tải lên: 21/12/2013, 03:15

... OF ELECTROMAGNETIC VIBRATORY CONVEYORS Željko Despotović, Aleksandar Ribić Mihajlo Pupin Institute, Belgrade, Republic of Serbia , zeljko@robot.imp.bg.ac.rs Abstract: The resonant electromagnetic ... it is possible to achieve sinusoidal or triangular half -wave current of actuator and setting his force. The application of sinusoidal wave includes the current control with a relatively high ... industry are often used mechanisms based on the vibratory conveyors with electromagnetic drive. Vibratory conveying drives with electromagnetic vibratory actuator (EVA) are a very popular because...

Ngày tải lên: 03/01/2014, 19:15

... is easy to check with simu- lation waveforms in Fig. 13. The LCE acceleration waveform has smooth sinusoidal characteristics, although the EVA current half -wave does not have the form of an ideal ... due to the hysteresis control. Drive current ripple does not effect the LCE oscillation waveform, since sine wave of displacement is “smooth,” like that of the SCR drive. The vibratory conveying ... to m s m s , the acceler- ation waveform takes almost sine form. In the observed section, the EVA current frequency is Hz. The EVA current and LCE acceleration waveforms obtained in this section...

Ngày tải lên: 03/01/2014, 19:16

... Characteristic waveforms in case of phase control B. Switch-mode control From electrical standpoint, EVA is mostly inductive load by its nature, so generation of the sinusoidal half- wave current ... Characteristic wave forms in case of switching control The usage of asymmetric half-bridge (dual forward converter), like in Fig. 9, is one possible solution. EVA is driven from sinusoidal half -wave ... due to the hysteresis control. Drive current ripple doesn’t affect LCE oscillation waveform, since sine wave of displacement is “smooth”, like that of the thyristor drive. R EFERENCES [1]...

Ngày tải lên: 03/01/2014, 19:16

... TRƯỜNG ĐIỆN TỪ - ELECTROMAGNETIC FIELD THEORY Chương 0 MỘT SỐ CÔNG THỨC TOÁN HỌC 1. Vector {} zyxzyx akajaia,a,aa r rr r ++== ...

Ngày tải lên: 26/01/2014, 02:20

... interference. 1.3 DESIGNING FOR ELECTROMAGNETIC COMPATIBILITY Electromagnetic compatibility (EMC) is the ability of an electronic system to (1) function properly in its intended electromagnetic environment ... xiii CONTENTS Preface xxiii PART 1 EMC THEORY 1 1. Electromagnetic Compatibility 3 1.1 Introduction 3 1.2 Noise and Interference 3 1.3 Designing for Electromagnetic Compatibility 4 1.4 Engineering ... TOGETHER BONDS EUT POWER CORD FIGURE 1-3. Test setup for FCC conducted emission measurements. 14 ELECTROMAGNETIC COMPATIBILITY Electromagnetic Compatibility Engineering Henry W. Ott Henry Ott Consultants As of...

Ngày tải lên: 07/03/2014, 10:20

... Page 4 IARC CLASSIFIES RADIOFREQUENCY ELECTROMAGNETIC FIELDS AS POSSIBLY CARCINOGENIC TO HUMANS IARC, 150 Cours Albert Thomas, 69372 ... members have been classified in Group1orGroup2A. Page 5 IARC CLASSIFIES RADIOFREQUENCY ELECTROMAGNETIC FIELDS AS POSSIBLY CARCINOGENIC TO HUMANS IARC, 150 Cours Albert Thomas, 69372 ... or tissue(s)whereanincreasedriskofcancerwasobservedinhumans.Identificationofaspecific targetorganortissuedoesnotprecludethepossibilitythattheagentmaycausecanceratother sites. Page 2 IARC CLASSIFIES RADIOFREQUENCY ELECTROMAGNETIC FIELDS AS POSSIBLY CARCINOGENIC TO HUMANS IARC, 150 Cours Albert Thomas, 69372...

Ngày tải lên: 15/03/2014, 01:20

Ngày tải lên: 17/03/2014, 13:38

Ngày tải lên: 17/03/2014, 13:40

Ngày tải lên: 17/03/2014, 13:45

Ngày tải lên: 17/03/2014, 13:46

Ngày tải lên: 22/03/2014, 11:20

Ngày tải lên: 04/04/2014, 12:23