testing of three phase ims

... 2.1a shows the principle circuit of an inverter fed 3 -phase AC motor with three phase windings u, v and w The three phase voltages are applied by three pairs of semiconductor switches vu+/vu-, ... Vector Control of Three- Phase AC Machines Nguyen Phung Quang · Jörg-Andreas Dittrich Vector Control of Three- Phase AC Machines System Development in the Practice With 230 Figures Prof Dr Nguyen ... dq components of the stator, rotor current components of the stator current Stator current of phases u, v, w Torque of inertia Feedback matrix, state feedback matrix Lie derivation of the scalar...

Ngày tải lên: 18/12/2013, 09:10

... ratio of fibre and matrix phase shear moduli of fibre and matrix phase Poisson’s ratio of fibre and matrix phase plane strain bulk modulus of composite material of aligned fibres shear modulus of ... fibre, three- phase composite is more heatproof than two - phase composite Calculated results of this material also indicate that when increasing volume fraction of glass particle phase, three- phase ... fraction of the particle phase we increase, the more thermal expansion coefficients of three- phase composite material reduce Conclusions Based on the idea solving the problem of three- phase composite...

Ngày tải lên: 28/03/2014, 13:20

... requirements of the degree of Bachelor of Engineering (Honours) in the division of Electrical Engineering, I present the following thesis entitled “Design and Implementation of a Three- Phase Induction Motor ... Modulation The objective of PWM is to shape and control the three- phase output voltages in magnitude and frequency by utilization of a constant DC voltage PWM is a process where three- phase sinusoidal ... capable of executing 20 million instructions per second This DSP controller offers the following: • 12 × PWM (Pulse Width Modulation) outputs Six of these will be utilized to drive the three- phase...

Ngày tải lên: 27/10/2013, 23:15

... is shown in part D, ofFig This part represents the harmonic detector for phase U in Fig The upper part of D, detects the sine term of the n -th harmonic component of the U- phase load current ... v; ) for the AC-side phase voltage vi, ( vi, , vi, ) of the PWM rectifier is obtained, that is, voltage of s, when s,, = when SI,= S3 is ON and S, is OFF when Generation of PWM Signals respect ... and s, s, is ON when is ON and S, is OFF when is OFF and s is ON when s, = s, = s, s, =1 =0 DETECTION OF HARMONICS As a method to detect harmonic components of a distorted current, we employ in...

Ngày tải lên: 03/01/2014, 19:44

... "Dead Beat Control of threePhase PWM Inverter", IEEE Transactions on Power Electronics, Vol 5, No 1, January 1990, pp 21-28 [3] Osman Kükrer, "Deadbeat Control of a Three- Phase Inverter with ... symmetr of the outp voltage i achieved a the linea region of t PWM I the ry put is and ar the modulator o the DC/AC VSI (Volta Source I m of C age Inverter) is e extended Figure principle of the ... Figure principle of the current control loo f op Since the inv verter must q quickly supp the load current IL to compensate the disturbance of the l ply o e load, the predictio of the load current...

Ngày tải lên: 19/01/2014, 02:20

... Testing of Body Armor Materials: Phase III Testing of Body Armor Materials Phase III Committee on Testing of Body Armor Materials for Use by the U.S Army— Phase III Board on ... reserved Testing of Body Armor Materials: Phase III Copyright © National Academy of Sciences All rights reserved Testing of Body Armor Materials: Phase III COMMITTEE ON THE TESTING OF BODY ARMOR ... National Academy of Sciences All rights reserved Testing of Body Armor Materials: Phase III TESTING OF BODY ARMOR MATERIALS - PHASE III   The Phase II letter report focused on the use of clay as...

Ngày tải lên: 29/06/2014, 09:21

... Quantities of Two-Pole, Three- Phase Stator Shown on Magnetic Axes of the Windings Conclusion The development of equivalent magnetic and electric circuits for a phase winding of a threephase stator ... the phase vector supply voltage and the resultant voltage vector of the three phase windings were obtained by vector addition of vector voltages that exist on the axes of the phase windings of ... utilized Magnetic and Electric Vectors of a Three- Phase Stator The application of the above technique to the three- phase, two-pole stator shown in Fig 1, whose phase windings are displaced from each...

Ngày tải lên: 26/10/2014, 14:40

... of Figures xix 3.4 Basic topology of PLL 91 3.5 Block diagram of three phase phase-locked loop system 93 3.6 Block diagram of the current controller of three phase ... voltages in three phase a-b-c frame ea1 , eb1 , ec1 three phase fundamental frequency supply voltages ep ,ep ,ep a b c three phase positive sequence supply voltages en ,en ,en a b c three phase negative ... Block diagram of PI controller with a plug-in type repetitive controller.145 List of Figures xxii 5.3 Bode plot of Ccl (z) for three phase PWM rectifier 146 5.4 Plot of phase angle γ(ω)...

Ngày tải lên: 11/09/2015, 16:02

... ………………………………………………………234 xiii List of Figures List of Figures Fig.1.1 Configuration of a three- phase boost-type PWM rectifier ………………… Fig.2.1 Structure of a three phase ac to dc PWM rectifier………………………….19 ... HIGH PERFORMANCE CONTROL OF A THREEPHASE PWM RECTIFIER YIN BO (M.Eng.， Wuhan University，China) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARMENT OF ELECTRICAL AND COMPUTER ... Experimental waveforms of three- phase currents and dc output voltage under unbalanced supply - Proposed output power control method …………….123 Fig.4.9 Experimental waveforms of three- phase currents and...

Ngày tải lên: 11/09/2015, 16:04

... fraction of dispersed phase K - ratio of dispersed phase viscosity to continuous phase viscosity – maximum packing fraction of dispersed phase – oil holdup at inversion point µ - dynamic viscosity of ... circular pipes 46 4.2.4 Friction factor for two phase liquid-liquid system 52 4.3 Results of three phase flow experiment 4.3.1 Results of three phase slug flow experiment iv 55 56 4.3.1.1 Slug ... Table of Contents Abstract vii List of Tables viii List of Figures ix List of Symbols xiii Introduction 1.1 Multiphase flow-General 1.2 Background of the study 1.3 Problems associated with multiphase...

Ngày tải lên: 28/09/2015, 13:28

... Therefore, three- phase current information cannot be constructed for that particular cycle SHUNT RESISTOR TRUTH TABLE IH 2H 3H 1L 2L 3L IBUS ON OFF OFF OFF ON ON +IA OFF ON OFF ON OFF ON +IB OFF OFF ... OFF OFF ON ON +IA OFF ON OFF ON OFF ON +IB OFF OFF ON ON ON OFF +IC OFF ON ON ON OFF OFF –IA ON OFF ON OFF ON OFF –IB ON ON OFF OFF OFF ON –IC FIGURE 15: SAMPLING TIME WINDOW FOR SIMILAR DUTY ... the use of power modules that not provide individual ground connection of each phase Another benefit of single-shunt measurement is that the same circuit is being used to sense all three phases...

Ngày tải lên: 11/01/2016, 17:06

... is a registered trademark of Computers and Structures, Inc SAP2000 is a registered trademark of Computers and Structures, Inc Windows is a registered trademark of Microsoft Corporation Adobe and ... selection The Properties of Object pop-up box for frames will appear as shown in Figure 10 Figure 10 Properties of Object box If the Properties of Object box is covering any part of the model in either ... starting point in your exploration of this powerful and comprehensive version of SAP2000 Using this Manual 1-1 Introductory Tutorial for SAP2000 Version Overview of the Program SAP2000 is a stand-alone...

Ngày tải lên: 06/09/2012, 15:56

... pain scores of 30 mm and a standard deviation of 15, with a power of 0.8, a P value of 0.05 was considered to be significant Data were analyzed using Jandel Sigmastat statistical software (San ... 1/3 of patients after sufentanil and fentanyl based analgesia while almost always necessary in case of remifentanil based analgesia The necessity of anticipation of postoperative pain in case of ... 12/9/0/0 NS 50±25 NS 15% NS Necessity of Titration 11/24 13/24 Amount of morphine 4±3 5±3 in PACU (mg) Length of stay in the 78±31 73±25 PACU (min) Incidence of PONV 46% 43% (%) Sedation ; (0/1/2/3)...

Ngày tải lên: 02/11/2012, 10:14

... tumors [4] Recently Xu B [5] suggested that accumulation of mutant β-catenin contributes to the development of C-MV of PTC A handful of sporadic cases have also been documented [6] Table summarizes ... evidence of frequent somatic mutations in exon of the beta-catenin gene J Pathol, 2003 1: 5867 Cameselle-Teijeiro J., et al Somatic but not germline mutation of the APC gene in a case of cribriformmorular ... cribriformmorular variant of papillary thyroid carcinoma Am J Clin Pathol, 2001 115: 486-493 Yamashita T., et al Peculiar nuclear clearing composed of microfilaments in papillary carcinoma of the thyroid...

Ngày tải lên: 03/11/2012, 10:05

... 4.1 Testing programme for Bed Table 4.2 Testing programme for Bed Table 4.3 Testing programme for Bed Table 4.4 Testing programme for Bed Table 4.5 Testing programme for Bed Table 5.1 Volume of ... maximum stroke length of 610mm and the following geometry: outer diameter of 35.6mm cone angle of 60o cone base area of 1000mm2 friction sleeve area of 15000mm2 length of 457mm The penetrometer ... is equal to 10% of the diameter of the base of the pile (BS 8004:1986), or the load at which settlement continues to increase without further increment in load A rate of movement of 0.25 mm/hour...

Ngày tải lên: 07/11/2012, 10:44

... rates of 0.01mm/s and 100mm/s in each bed are compared in Figure 6.5 to 6.9 The ratios of the maximum measured shaft loads of the CRP test at a rate of 100mm/s to that of the CRP test at a rate of ... that of the first three beds only for the first series of tests After the first series of tests the clay bed was subjected to a triaxial consolidation pressure of 400kPa Although two series of ... results of CRP tests at the rate of 0.01mm/s 143 Chapter Testing data and discussions The comparison of some load-settlement curves are shown in Figures 6.10 to 6.24 Combining the results of all...

Ngày tải lên: 07/11/2012, 10:44

... Regulation of S Phase 41 in the Walker A domains show S -phase defects and cell cycle arrest (Schwacha and Bell, 2001) Biochemical analysis of MCM helicase activity showed that the ATPase activity of ... expression of geminin, a protein inhibitory of Cdt1, increases in S -phase, further preventing MCM2-7 loading Regulation of S Phase 43 wise assembly of factors is regulated at each stage, mostly ... is also co-dependent with Cdc45, Dpb11, and Sld3; binding of any of Regulation of S Phase 47 these proteins depended on the presence of the others (Kubota et al., 2003; Takayama et al., 2003)...

Ngày tải lên: 25/10/2013, 21:20

... Performance Testing V10 050111 Page of TO Passive Testing With Hand-Held Field Testers There are currently three levels of hand-held field tester: Level 2e – for testing up to Class D Level – for testing ... This requirement only applies to PL testing Channel testing still uses the Vendor’s patch cords, which are to be left in situ after testing The configuration of the Permanent Link and Channel is ... Performance Testing of Permanent Links and Channels Testing of telecommunications Permanent Links and Channels to determine performance...

Ngày tải lên: 26/10/2013, 19:15