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Search results for: coupling
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Year: 2011, Volume: 11, Number: 1
... inc E scat Array of signal. The dynamic range of the reported imaging systems Dipoles is more than 120 dB [1]. In many microwave tomographs a coupling medium between the antennas and the body is introduced in order to avoid strong reflections from the air/skin interface. Therefore the patient orientation for these systems ...
Year: 2011, Volume: 11, Number: 1
... 2 2 effect which can be computed assuming the current I f p € fs 2 flowing through the red wire and I/2 currents flowing -computation of the coupling coefficient k € 2, fp through the blue wires. Computing the magnetic energy Wm it follows that the parasitic inductance is Lp= 2 Wm/I2 ...
Year: 2010, Volume: 10, Issue: 4
... and rotor voltages Vdr and V qr respectively. The coupling term variable pulsations respectively; Vdq, I dq ... CONTROL STRATEGY OF THE DFIG DFIG PCC+ A. Decoupling of the active and reactive powers Gear In an ... and I qr the magnetizing inductance. ž is the coupling-axes matrix The electromechanical equation is expressed by: are ...
Year: 2010, Volume: 10, Issue: 4
... top is plotted in Fig. 13. Again, as in simulations (Fig. 8 and 11), it describes an almost perfect circle due to the decoupling between the sampling period of the control system and the switching period of the inverter. Fig. 11 The locus of stator flux space vector top for simplified ...
Year: 2010, Volume: 10, Issue: 4
... . This means that DG unit has most effect on DG cell (FC) hybrid system increases the voltage in its point of bus (PCC). common coupling (PCC) and other buses in distribution network[7]. The voltage change depends on the network configuration under load conditions, and it is related ...
Year: 2010, Volume: 10, Issue: 4
... Es s s r € u s € Rs i s € Ls. s (5) avoided. Secondly, the rotor flux orientation avoids cross- dt coupling blocks in the d and q current regulators. The only Estimated back-emf, and as well all the variable used in (5 ), disadvantage is the ...
Year: 2010, Volume: 10, Issue: 4
... the way of the light beam adjustment, Fig. 2. performing the optical coupling. This system of filters allows the mechanical modification of the optocoupler output parameters ... element London, GB, 1985. and can be caused by optical and mechanic couplings. [3] G. Raţƒ, M. Raţƒ, I. ...
138. Control Strategy for Three Phase Voltage Source PWM Rectifier Based on the Space Vector Modulation
Year: 2010, Volume: 10, Issue: 3
... frequency. Equation (7) shows that d q current is related with both coupling voltages ‰Li q and ‰Li d and main voltage u d and u q ... knowledge. Several modulation (SVPWM) control scheme for three-phase voltage methods for dq decoupling and control, similar to the field source PWM rectifier. The control system ...
Year: 2010, Volume: 10, Issue: 3
... . By Imax motor shaft are transmitted to the load, resulting in mechanical was noted the maximum current obtained during the start-up wear in the motor bearings and load couplings. Therefore, and by IR the load current [14], [15]. Digital Object Identifier 10.4316/AECE.2010.03005 27 1582-7445© 2010 AECE Advances ...
Year: 2010, Volume: 10, Issue: 3
... Voltage of Transformer(per unit) 4 5 6 8 fundamental frequency and chaotic ferroresonance 6 1 3 conditions similar to high capacity power transformers fed 2 via capacitive coupling from neighboring sources. Repeated 4 simulation of the system's nonlinear differential equation has shown that a change in the value of the equivalent 2 circuit capacitance to earth ...
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