sizing a vertical three phase separator field units

... [15] Das S S., Satapathy A. , Das J K., Panda J P Mass transfer effects on MHD flow and heat transfer past a vertical porous plate through a porous medium under oscillatory suction and heat source ... periodic permeability Ind J Pure Appl Math 2002, 33(6), 941-949 [13] Chauhan D S., Sahal S Flow and heat transfer over a naturally permeable bed of very small permeability with a variable suction ... 927-941 [9] Sattar M A Free convection and mass transfer flow through a porous medium past an infinite vertical porous plate with time dependant temperature and concentration Ind J Pure Appl Math 1994,...

Ngày tải lên: 05/09/2013, 14:58

... 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 signals are compared with a ... between phase A and phase B (VAB = VA – VB) This is because it is connected in a three- phase Y format, this can be seen in Figure 5.5 As a consequence of this, a sinusoidal signal is created (see ... the rotating reference frame, are then converted into three- phase a, b, c values that are referenced in the stationary frame via inverse Clarke and Park transformations The inverse Clarke transform...

Ngày tải lên: 27/10/2013, 23:15

... depending on the power term A & that is affected by the factor k Actually, such a factor allows the charge/discharge speed to be controlled A fast dynamic can be generally obtained choosing kS1 in ... controller A conditional integrator, a limited integrator and a tracking anti wind up controller, are commonly used among other solutions However none has faced this problem investigating the actual cause ... AC/DC actual power factor PF and can be much smaller than the theoretical one, computed for PF= This behaviour can be recognised in Fig that shows the system evolution at startup, with such a...

Ngày tải lên: 03/01/2014, 19:44

... signal forphase v which is given by (11) can also be obtained in the same manner as that explained above for phase U EXPERIMENTAL INVESTIGATION To confirm the operation of the three- phase PWM rectifier ... i,, PWM signals SI,, S, and S , for phase U, phase v and phase w , respectively, are generated as follows: are obtained, which are given by To produce these currents , the rectifier A has to produce, ... nt-type PWM rectifier with active filtering function", IEEJ SPC- 96 (107), 11-20 ( in Japanese) KataokaT, Murota 1, Fuse Y, Nakajima D and Nishikata S 1999, A Single -phase Voltage-Type P W Rectifier...

Ngày tải lên: 03/01/2014, 19:44

... IEEE-IAS Annu Meeting, 1992, pp 132–138 T Kawabata, T Miyashita, and Y Yamamoto, “Dead beat control of three phase PWM inverter,” IEEE Trans Power Electron., vol 5, pp 21–28, Jan 1990 A Kawamura, ... Lorenz and D M Divan, “Dynamic analysis and experimental evaluation of delta modulators for field oriented ac machine current regulators,” in Conf Rec IEEE-IAS Annu Meeting, Atlanta, GA, 1987, ... have been systematically described in this paper The advantages and limitations have been briefly examined, and the application field where each technique is particularly suited has been indicated...

Ngày tải lên: 03/01/2014, 19:45

... Kawabata, Takeshi Miyashita and Yushin Yamamoto, "Digital Control of three- Phase Inverter with LC Filter", IEEE Transactions on Power Electronics, Vol 6, No 1, January 1991, pp 62-72 [2] Takao Kawabata, ... Kawabata, Takeshi Miyashita and Yushin Yamamoto, "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 ... Performance Deadbeat Controlled PWM Inverter using a Current Source Compensator for nonlinear loads", IEEE/PESC 23rd Anual, Toledo, Spain 1992, pp 443-450 [5] Tomoki Yokoyama and Atsuo Kawamura,...

Ngày tải lên: 19/01/2014, 02:20

... subject dealt with may participate in this preparatory work International, governmental and nongovernmental organizations liaising with the IEC also participate in this preparation IEC collaborates ... aux travaux desquels tout Comitộ national intộressộ par le sujet traitộ peut participer Les organisations internationales, gouvernementales et non gouvernementales, en liaison avec la CEI, participent ... Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense While all reasonable efforts are made to ensure that the technical content...

Ngày tải lên: 04/04/2014, 11:58

... topology, the control can be done either as a three- phase unit or three separate single -phase units An independent phase control approach based on single -phase instantaneous reactive power theory ... sag in Phase A) Phase unbalance (20◦ , −120◦ & −240◦ ) Amplitude & phase unbalance Distorted (15% 3th & 10% 5th order harmonics) Distorted & unbalanced (amplitude & phase) 174 D Sreenivasarao ... single -phase shunt APF Fig A hybrid approach for compensation of neutral current: a zigzag transformer with single -phase series APF 6.4.3 Star-delta transformer with single -phase half-bridge PWM APF...

Ngày tải lên: 11/05/2014, 22:06

... differential equation for winding b as vb = i b Rb + d λb dt (5) where, vb , i b and λb are the scalar phase supply voltage, scalar phase current and scalar phase flux linkage respectively and Rb ... the phase magnetic axes as shown in Fig Each magnetic or electric phase variable can now be added vectorially to produce the resultant of r r r that variable Hence the resultant magnetic field ... voltage La di a r which opposes the current i a Since the magnitude of i a and i a are equal, and dt di a r can be referred i a lies along the winding’s magnetic axis, then the voltages i a R a...

Ngày tải lên: 26/10/2014, 14:40

... (2.8) and (2.9) is of non-minimum phase as the resultant internal dynamics is unstable as presented in appendix A The non-minimum phase feature appears as right half plane (RHP) zeros in a linear ... d-axis and q-axis dynamics Besides, after linearization, the accuracy of the resulting model remains to be evaluated Since all the time-variant variables associated with a three- phase PWM rectifier ... of a PWM rectifier is a challenging task because besides having MIMO non-linear structure, the rectifier also exhibits a non-minimum phase feature Appendix A shows a detailed analytical and qualitative...

Ngày tải lên: 11/09/2015, 16:04

... phase xiii – wall shear stress – wall shear rate Q – volume flow rate ̇ – multiphase mixture quality Subscript o – oil phase w – aqueous phase m – oil-water mixture L – liquid phase G – gas phase ... compact separation units (Haandrikman et al (1999)) Feed-forward control (Skogestad separation and it is not very robust due to model and Havre (1996)) Separator unit is used as buffer instead ... basically due to the instability of the dispersed phase droplets which coalesce and break-up at a critical packing fraction to invert into continuous phase Another mechanism postulated for phase...

Ngày tải lên: 28/09/2015, 13:28

... 765-864-8360 Fax: 765-864-8387 Los Angeles Mission Viejo, CA Tel: 949-462-9523 Fax: 949-462-9608 Santa Clara Santa Clara, CA Tel: 408-961-6444 Fax: 408-961-6445 Toronto Mississauga, Ontario, Canada Tel: ... eliminates the need to calibrate each phase amplification circuit or compensate in software Disadvantages During single-shunt measurements, a modification on the sinusoidal-modulation pattern ... (critical measuring time) so that current stabilizes to a new value that is actually measurable by the Analog-to-Digital Converter (ADC) The method proposed in this application note is simple and...

Ngày tải lên: 11/01/2016, 17:06

... Sakai, M., Imbe, T., Nemoto, H., Horisue, N., Nakagawa, N., Sato, H., Hirasawa, H., Takadate, M., Tamura, K., Ando, I., Ishii, T., Iida, S., Maeda, H., Aoki, N., Ideta, O., Hirabayashi, H., and ... increased until 120 days after transplantation, and thereafter a constant height was maintained in every case The leaf area index (LAI), however, increased until heading and then decreased (Hasegawa ... Productivity and Water Balance of Irrigated Rice and Its Application to Southeast Asia., Southeast Asia Studies Vol.25, No.1, 63-74 Horie, T., Yajima, M., and Nakagawa, H (1992) Yield forecasting., Agricultural...

Ngày tải lên: 05/09/2013, 09:38

... flow field are magnetic parameter M, permeability parameter Kp, Grashof number for heat transfer Gr and heat source parameter S The effects of these parameters on the velocity field have been analyzed ... friction at the wall against Kp for different values of magnetic parameter M and heat source parameter S are entered in Tables and respectively From Table 1, we observe that a growing magnetic parameter ... m7 = A6 = − A5 + A4 + A3 , A7 = A1 0 = A7 − A8 + A9 , B1 = A1 m5 (m3 − m5 )(m4 + m5 ) , A8 = A1 m1 (m3 − m1 )(m4 + m1 ) , A9 = A2 m7 (m3 − m7 )(m4 + m7 ) , 2 A1 A3 Pr G r A1 A5 Pr G r − A1 A4 Pr...

Ngày tải lên: 05/09/2013, 16:10

... hardware: The internal processor timer is used to generate the pulse pattern Since the 2nd variant causes certain disadvantages, such as an inaccurate voltage realization, particularly at the ... Parameter estimation from name plate of PMSM Automatic parameter estimation for IM in standstill Pre-considerations Current-voltage characteristics of the inverter, stator resistance and transient ... The actual voltage uv of phase v The voltage errors Δuv The influence of tD on the trajectory of the stator voltage vector us as well as on the fundamental wave of the phase voltage are illustrated...

Ngày tải lên: 18/12/2013, 09:10

... 1,3,5 0 2,4,6 Table Phase voltage space vectors State Phase voltage space vectors 12/ 3) Vdc / (101) Figure Phase voltage space vectors -(2/3) VdC '(100) Real (001) Table Phase voltage values for ... where a =exp(j2UT/3) The space vector is a simultaneous representation of all the three- phase quantities It is a complex variable and is function of time in contrast to the phasors Phase- to-neutral ... APPENDIX %Matlab Code to generate Switching functions %0 Inputs are magnitude u1(:),angle u2(:) 00 and ramp time signal for comparison u3(:) function [sfl=aaa(u) ts=0.0002;vdc= ;peak _phase max=...

Ngày tải lên: 24/12/2013, 11:32

... of Hawai’i, Los Angeles, Miami, Newark, Providence, San Antonio, Savannah, and Seattle.32 Campaigns that Promote Savings and Financial Access The formation of AEIs and Bank On was happening at ... functional reloadable pre-paid card, provides a family with the means to make the basic financial transactions necessary for day-to-day life and facilitates saving Individuals without a safe place ... campaigns also facilitate access, through financial institution partnerships, to affordable savings accounts and other financial products There are approximately 60 state and local America Saves campaigns...

Ngày tải lên: 16/02/2014, 06:20

... that v0s is zero for a balanced three- phase induction motor Show that v0s is zero for a balanced three- phase synchronous machine Show that v0s is zero for a balanced three- phase permanent magnet ... reference frame, the average q-axis voltage is equal to the peak value of the fundamental component of the applied line-to-neutral voltage and the average d-axis voltage is zero This transformation ... sinusoidal fashion and w is a triangle wave that varies between −1 and with a period Tsw In practice, each of these variables is typically scaled such that the actual voltage levels make the best...

Ngày tải lên: 16/02/2014, 18:53