induction motor design above 100kw and constant v f

Design and Implementation of a Three-Phase Induction Motor Control Scheme

Ngày tải lên : 27/10/2013, 23:15

... speed that the induction machine accelerates toward for a given voltage and frequency Therefore, by applying different voltages of different frequency (voltage and frequency have to increase ... waves of varying duty-ratio, we can use the MOSFETs to amplify the PWM waveform to significant voltage levels that the induction machine can operate off PWM generation through the software design ... speed operation of the motor has an upper limit that is equal to the rated speed of the motor Operation of the induction motor above the rated speed affects the drive efficiency and torque production...

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SIMULATION AND SPEED CONTROL OF INDUCTION MOTOR DRIVES

Ngày tải lên : 18/12/2013, 22:06

... control for constant V/ f control method Figure 4.12: Variation of Torque of a 3-in case of open loop PI control for constant V/ f control method Figure 4.13: Variation of Rotor Speed of a 3-in ... case of closed loop PI control for constant V/ f control method Figure 4.16: Variation of DC Bus Voltage of a 3-in case of closed loop PI control for constant V/ f control method Figure 4.17: Variation ... method of an induction motor 4.3.1 Closed Loop V/ f speed control method The basis of constant V/ f speed control of induction motor is to apply a variable magnitude and variable frequency voltage...

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Direct control methods for matrix converter and induction motor

Ngày tải lên : 13/05/2014, 00:55

... SWITCHING TABLE FOR DTC [8, 9] Cψ=-1 CT=0 V7 V0 V7 V0 V7 V0 CT=-1 V2 V3 V4 V5 V6 V1 CT=1 V6 V1 V2 V3 V4 V5 CT=-1 V3 V4 V5 V6 V1 V2 Cψ=1 CT=0 V0 V7 V0 V7 V0 V7 CT=1 V5 V6 V1 V2 V3 V4 ^ + * T T sin(ϕi) ... a b a b vb vc va vb va vb -2/3 vab -2/3 vbc 2/3 vab 2/3 vbc π π - iA iA - iA iA 15 16 17 π iA π 18 a c c va vc vc -2/3 vca 2/3 vca π iA - iA (1-a²) 2/3 iA b b a vb vb va a² 2/3 vab 2/3 vab 4π ... input voltage vi into 12 sections of 30° respectively For every section the output voltage vo is computed for vb va vc 120° 180° 60° vac 360° 240° vba vbc 300° vcb vca vab vo each switch configuration...

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ADAPTIVE FAULT DETECTION AND CONDITION MONITORING OF INDUCTION MOTOR

Ngày tải lên : 26/09/2015, 10:59

... becomes finer while that in frequency domain becomes coarser [17] 3.1.2 Adaptive Wavelet Design A wavelet is a waveform of effectively limited duration that has an average value of zero It is a wave-like ... deviation of absolute value E Shannon entropy ℱ Wavelet center placement for bearing fault detection R Resampling ratio ccfsH Coefficients of normal motor after extraction ccfsB Coefficients of bearing ... bearing fault motor after extraction ccfsBR Coefficients of broken rotor bar motor after extraction motor H Stator current signal of normal motor B Stator current signal of bearing fault motor...

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Linear Minimum Mean-Square-Error Transceiver Design for Amplify-and-Forward Multiple Antenna Relaying Systems

Ngày tải lên : 20/11/2012, 11:31

... kinds of cooperative protocols: amplify-andforward (AF), decode -andforward (DF) and compress -andforward (CF) For AF strategy, the relay only ampliﬁes and forwards the received signal from the ... 51] to solve for F and G In the following, it is shown that given F, there is a closed-form solution for G, and vice versa Therefore, the proposed algorithm computes F and G iteratively, starting ... transceiver design is very challenging Furthermore, depending on the speciﬁc modulation and number of users, the transceiver design is of different natures and must be tackled in different ways...

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Tài liệu tiếng anh Điện tử công suất mạch MERS Improved performance of induction motor using magnetic energy recovery switch

Ngày tải lên : 15/10/2013, 16:10

... 7in, Vmers, Vterm, I are phasors of vin, Vmers, Vterm and i respectively a is the phase difference angle between Vmers and Vin.-b is the power factor angle of the load In steady state, Vmers ... frequency Fig 40 60 time (ms) Xr fXs Rr fXr frequencyr 20 Rr (a) System iS~~~~~~~~~~~~~~ ° Xs 80 00 fXl ARr Fig Equivalent circuits of series compensated induction motor for system frequency and self-excited ... achieve the unity input power factor, the time of the phase difference, 6, should be fixed at, -10- 20 Fig power 10 20 time (ms) Simulated waveforms of current and voltages when the input factor...

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Theory and Design of Electrical and Electronic Circuits

Ngày tải lên : 23/10/2013, 16:15

... of a diode can be considered like the one of a generator of voltage ; for that reason, the different transistors have a voltage differential of offset VOS of some millivolts For the TBJ inconvenient ... anyone is always very great : Qef >> 1, and therefore in these conditions one is fulfilled VC = Igmax / ωef CP = Vg / Refωef CP = Vg / Qefmax and if we applied Thevenin VgTH = Vg ( R + sL ) / ... (small) v — continuous or average (great) V — effective (great) V or Vef — peak Vpico or vp — maximum Vmax — permissible (limit to the breakage) VADM Advice for the designer All the designs that...

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Electronics - Theory and Design of Electrical and Electronic Circuits

Ngày tải lên : 27/10/2013, 16:15

... of a diode can be considered like the one of a generator of voltage ; for that reason, the different transistors have a voltage differential of offset VOS of some millivolts For the TBJ inconvenient ... anyone is always very great : Qef >> 1, and therefore in these conditions one is fulfilled VC = Igmax / ωef CP = Vg / Refωef CP = Vg / Qefmax and if we applied Thevenin VgTH = Vg ( R + sL ) / ... (small) v — continuous or average (great) V — effective (great) V or Vef — peak Vpico or vp — maximum Vmax — permissible (limit to the breakage) VADM Advice for the designer All the designs that...

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DNA by Design. Stephen Meyer and the Return of the God Hypothesis

Ngày tải lên : 01/11/2013, 07:20

... by virtue of being divinely created in a loving and merciful image, but rather by being loving and merciful Furthermore, one would be praiseworthy for having such moral virtues, irrespective ... have no grounds for any inference once we open the door to divine design The same sort of problem arises for the hypothesis of divine design if one tries to assess its explanatory virtues For ... Controversies in Biology before the U.S Commission of Civil Rights in August 1998; at a brieﬁng for some members of Congress and their staffs on Scientiﬁc Evidence of Intelligent Design and Its...

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Tài liệu Ecodial V3.38 Low-voltage electrical installation design software Fupact and variable speed drive ppt

Ngày tải lên : 12/12/2013, 13:15

... results for calculated items b Fupact offer is perfectly integrated into Ecodial In Ecodial V3 .38, the complete range of Fupact is integrated: Fupact INF., Fupact ISFL and Fupact ISFT According ... choice of fuses: v Range: Fupact, GK1, GS1, LS1, Multi 9, Diazed, aM, gG, gM v Fuse-Combination Unit type: Switch disconnector, disconnector, without FCU v Fuse type (standard): DIN (or NH), NFC, ... protection for ﬁnal circuits supplying sockets v LV/LV transformer: Ecodial accepts all primary voltages and gives more information into the calculation result like Transformer R phase, Transformer...

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SINUSOIDAL PWM OPERATION OF AN AC INDUCTION MOTOR CONTROLLER

Ngày tải lên : 17/12/2013, 18:06

... networks of R2a and C2, and R3a and C3 vary the frequency of the sine wave For water level sensing, the resistorcapacitor networks of R2b and C2, and R3b and C3 vary the frequency of the sine wave The ... Gate Driver +15 Vdc OUTPUT WAVEFORM V+ Vb H-Bridge IN Ho Vdc DT Vs PWM PULSE Z1 First half of Switcher cycle MOTOR Vss Z4 Lo GRD Comm IR21094 First half-cycle Fig 29 The left-side gate driver (in ... The speed of the motor varies in direct relationship to the frequency II DESIGN OVERVIEW This design overview section will briefly review the relevant issues of motor controller design Fig.1 below...

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Tài liệu A neural-network-based space-vector PWM controller for a three-level voltage-fed inverter induction motor drive doc

Ngày tải lên : 22/12/2013, 08:16

... Because of waveform can also be derived for and symmetry, the turn-off times (see Fig 4) can be given as - - (7) for - for - (8) state pulsewidths are evident and the corresponding and from the figure ... figure These signals are compared with the output of a single UP/DOWN counter and processed through a logic block to generate the PWM outputs for for for for for (5) for for for for for for for ... for for for for (6) for for for for for 664 IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL 38, NO 3, MAY/JUNE 2002 TABLE II ANALYTICAL TIME EXPRESSIONS OF VOLTAGE VECTORS IN DIFFERENT REGIONS AND...

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Foundation game design with HTML5 and javascript V413HAV

Ngày tải lên : 24/01/2014, 17:04

... codes for a few common colors: Black: #000000 White: #FFFFFF Red: #FF0000 Blue: #0000FF Green: #00FF00 Yellow: #FFFF00 Orange: #FF9900 Violet: #CC33FF Note: You can shorten black to #000 and white ... common serif fonts You often find serif fonts used in books and newspapers Sans-serif fonts don’t use any details on the edges of letters Common sans-serif fonts are Arial, Helvetica, and Futura ... @font-face Here’s how to embed and use a custom font in an HTML document Find the font file for the type of font you want to use The two most common font formats are True Type Fonts (which have...

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Tài liệu AC Induction Motor Fundamentals docx

Ngày tải lên : 25/01/2014, 13:20

... CURVE OF 3-PHASE AC INDUCTION MOTOR x FLC Full Voltage Stator Current LRC x FLT x FLC x FLC x FLC LRT Full Voltage Start Torque x FLT x FLC x FLC Pull-up Torque x FLC Sample Load Torque Curve ... overloaded beyond the full load NEMA Nom Efficiency Motor operating efficiency at full load PH Specifies number of stator phases of the motor Pole Specifies number of poles of the motor Specifies ... LRC of a motor can range from 500% of Full-Load Current (FLC) to as high as 1400% of FLC Typically, good motors fall in the range of 550% to 750% of FLC The starting torque of an induction motor...

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Tài liệu Practical Design of Ships and Other Floating Structures Volume I pdf

Ngày tải lên : 13/02/2014, 16:20

... driving force of better safety and environmental protection standards 7 SAFETY CULTURE AND DEVELOPMENT OF SHIP AND OFFSHORE INSTALLATIONS DESIGN STANDARDS 3.I Maritime safety culture As I have ... classification societies have been making every effort to prevent safety at sea and marine environmental protection With the development of scientific technology and ship & offshore installations design ... K Egorov and V. K Kozlyakov ULTIMATE STRENGTH - STIFFENED PLATES AND SHELLS A New Design Model for Ultimate and Buckling Strength Assessment of Stiffened Plates E Sleen T.K 0stvold and S Valsgdrd...

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Tài liệu Design Discourse - Composing and Revising Programs in Professional and Technical Writing doc

Ngày tải lên : 15/02/2014, 01:20

... She believes this integrative vision among some faculty members paved the way for the 1998 hiring of an Associate Professor of Composition and Rhetoric and for a significant store of goodwill ... honest and liberal practice of a profession ; but much more is performed if a man be able to visit and strengthen the roots and foundation of the science itself.”(546) Sir Francis Bacon, “Preface,” ... service and the via activa— wanted to draw knowledge from and apply knowledge to the natural and social world; and his great treatise, The Advancement of Learning (1605), later revised and expanded...

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Chapter 13 induction motor drives

Ngày tải lên : 16/02/2014, 18:54

... Table for Direct Torque Control Sector ΔTe Δ|λs| I II III IV V VI −1 −1 1 0 V2 V7 V6 V3 V0 V5 V3 V0 V1 V4 V7 V6 V4 V7 V2 V5 V0 V1 V5 V0 V3 V6 V7 V2 V6 V7 V4 V1 V0 V3 V1 V0 V5 V2 V7 V4 Figure ... Performance of constant slip frequency drive (maximum torque-per-amp) Figure 13.3-3. Performance of constant slip frequency drive (maximum efficiency) 516 Induction Motor Drives Figure 13.3-4. ... achievable voltage vectors TABLE 13.8-1. Achievable Voltage Vectors and Corresponding Switching State Switching State Voltage Vector V0 V1 V2 V3 V4 V5 V6 V7 T1 / T4 T2 / T5 T3 / T6 1 0 1 0 1 0 0 0...

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Tài liệu Marketing Research Methods in SAS - Experimental Design, Choice, Conjoint, and Graphical Techniques docx

Ngày tải lên : 18/02/2014, 07:20

... of alternatives for most of your choice design needs Each of the last few editions has relied much more heavily on the %ChoicEff macro than preceding editions did The %ChoicEff macro is heavily ... consumer preferences for products and services See Green and Rao (1971) and Green and Wind (1975) for early introductions to conjoint analysis and Green and Srinivasan (1990) for a recent review article ... of the window The analysis requires preference and attribute variables The preference variables are the ranks from the seven respondents and the attribute variables are the four factors See Figure...

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