electric motors and drives 4th edition pdf

... BDFTIG The total electric torque (Te) for the BDFTIG is the sum of the individual electrical torques of both machines: 4 P p(Ψq The electric torque equation is defined by the friction and total inertia ... IM speed and to keep internal signals bounded Figure 14 shows the DFIG rotor currents i rGa and i rGb, and their references over a period of time Again, these currents are sinusoidal and bounded ... IM speed and to keep internal signals bounded Figure 30 shows the DFIG rotor currents i rGa and i rGb, and their references over a period of time Again, these currents are sinusoidal and bounded

Ngày tải lên: 21/06/2014, 01:20

... PETRUZELLA Electric Motors and Control Systems, First Edition Electric Motors and Control Systems www.EngineeringEBooksPdf.com pet21825_fm.indd i 4/1/09 9:16:46 AM www.EngineeringEBooksPdf.com pet21825_fm.indd ... pet21825_fm.indd ii 4/1/09 9:16:47 AM Electric Motors and Control Systems Frank D Petruzella www.EngineeringEBooksPdf.com pet21825_fm.indd iii 4/1/09 9:16:47 AM ELECTRIC MOTORS AND CONTROL SYSTEMS Published ... D Electric motors and control systems / Frank Petruzella p cm Includes index ISBN-13: 978-0-07-352182-4 (alk paper) ISBN-10: 0-07-352182-5 (alk paper) Electric motors Electric controllers Electric

Ngày tải lên: 17/10/2021, 18:00

... Institute of Electrical and Electronics Engineers (IEEE) “Standard Test Procedure for Polyphase Induction Motors and Generators” IEEE 112-B and in its Canadian CSA 390 adaptation The standard first ... of the rotating electric machine Electric drives have quickly become an integral part of our everyday lives and we can hardly imagine our civiliza-tion without them Electric drives play a vital ... of modern electric drives The twelve chapters of the book writt en by renowned authors, both academics and practitioners, cover a large part of the fi eld of electric machines and drives Various

Ngày tải lên: 21/06/2014, 01:20

... energy efficient motors is the Energy Policy Act (EPAct) which mandates strict energy efficiency standards for electrical appliances and equipment This law was first adopted in USA and became effective ... incentives and voluntary measures for the energy efficiency of electric motors is not sufficient, as it is prerequisite to implement mandatory measures for Trang 4Fig 5 Incentives, voluntary and mandatory ... Experimental setup and results Figure 6 depicts the experimental laboratory set-up The motors are fed by three single phase autotransformers and direct torque control, DTC drives The motors are mechanically

Ngày tải lên: 21/06/2014, 01:20

... sin θ 0 cos θ 0  and K =  2 3 ⎡ ⎢ ⎣ 1 − 1 2 − 1 2 0 − √ 3 2 − √ 3 2 ⎤ ⎥ ⎦ . x qd and x αβ stand for two-dimensional voltage flux and stator current vector, respectively on (q-d) and ( α-β)reference ... JL r ; 98 Electric Machines and Drives [...]... and a simplified FLC control is presented Experimental results in DSP TMS 320F2812 platform show the performance of both systems 1 06 Electric ... to that of rotor flux and speed. Therefore, future research efforts may be made towards developing rotor resistance estimation algorithm using the Electric Machines and Drives 94 new machine

Ngày tải lên: 21/06/2014, 01:20

... variables 1 prime mover torque and speed, (τ LG , ω G ),and rotor and stator voltages and currents, (v rG , i rG ), (v sG , i sG ), respectively. The IM, on the other hand, is a two–port system with ... − isG = ˜ λ P with L ij (i = 1,¯ 3, j = 1,¯ 3) and Δ are given by (10) and (11), respect Then, (38) (39) 124 Electric Machines and Drives ˙ ˜ BvrG = λd + RL −1 (θ )λd + K p BPL... ... 122 Electric Machines and Drives with M1 = c2 + c2 = Constant and γ = arctan c2 = Constant if c1 = 0, else γ = 2 c1 1 Then, with (32):... the PBC + PI controller is proven 126 Electric

Ngày tải lên: 21/06/2014, 01:20

... single-phase induction motor drives, Electrical Machines and Systems, 2005 ICEMS 2005 Proceedings of the Eighth... induction motors, Electric Machines and Drives Conference, 20 09 ... potential applications in electric drives The excellent characteristics of PSO may be successfully used to optimize the performance of electric machines and electric drives in many aspects ... estimated that, electric machines consume more than 50% of the world electric energy generated Improving efficiency in electric drives is important,... ( 198 9) Recursive speed and parameter

Ngày tải lên: 21/06/2014, 01:20

... optimization (PSO) used to achieve the best performance for the electric machines and electric drives In addition, by analyzing and comparing the results, it is shown that control strategy based ... voltages and currents and Figure 3 shows the DC-link current and voltage It can be seen that both electrical quantities in the DC bus are smooth with no visible pulsations Fig 2 Phase voltages and ... inertia of motor λds,qs : stator flux(d and q axis) λdr,qr : rotor flux(d and q axis) Vds,qs : stator voltage (d and q axis) ids,qs : stator current (d and q axis) M : mutual inductance

Ngày tải lên: 21/06/2014, 01:20

... (L las , L lbs ) and (L mas , L mbs) indicate the stator leakage inductance and magnetizing inductance, respectively, and L lr and L mr indicate the rotor leakage inductance and magnetizing inductance, ... voltage to guarantee installation cost reduction and some individual motor controls In Wekhande et al (1999) and Jabbar et al (2004), Campos et al (2007a) and Campos et al (2007b), two topologies are ... , L arbs(bsar) and L asar(aras),L bsbr(brbs) are the mutual inductance between the stator and rotor windings Since the stator windings are in space quadrature and asymmetric, and the rotor windings

Ngày tải lên: 21/06/2014, 01:20

... actual value of the motor speed In Fig 9 and Fig 10, the torque Fig 8 Motor speed (rpm) Trang 2Fig 9 Commanded and estimated torque (Nm) Fig 10 Commanded and estimated flux Fig 11 Stator currents ... A M N and da Silva, E R C (1999) Single-phase Induction Motor Drives Systems, APEC´99, Dallas, Texas, vol 1, pp 403-409 Krause, P C.; O Wasynczuk, O and Sudhoff, S D (1995) Analysis of Electric ... S.; Landin, R P.; Filho, E B S.; Lins, Z D.; Cruz, J M S and Accioly, A G H (2002) Single-Phase Induction Motor Drives with Direct Torque Control, IECON´02, vol.1, pp 241-246 Takahashi, I and

Ngày tải lên: 21/06/2014, 01:20

... Hosseini, Tohid Nouri2 and Mehran Sabahi, “A Novel Hybrid Active Filter for Power Quality Improvement and Neutral Current Cancellation,” International Conference on Electrical and Electronics Engineering, ... in benefiting from the first and second method, where the matrix used for the calculation of the duty time containing simple operation and the elements are just 0,1 and -1 As a result the four ... on two level inverters and later for multilevel inverters But it is important to mention that the SVMPWM gave a great flexibility and helps in improving the technical and economical aspect using

Ngày tải lên: 21/06/2014, 01:20

... (Smith and Duffy, 1990; Barrett and White, 1991; Duffy and Haller, 1993) Nets are also being used in open pit mines for rock fall control (Brawner and Kalejta, 2002)... pit and hillside ... horizontally bedded shale and sandstone, with weaker coal and shale formations located at toe of cut faces angles between about 40◦ and 55◦ , rocks will tend to roll down the face and into the ... 1 980 ; Wu, 1 984 ; Descoeudres and Zimmerman, 1 987 ; Spang, 1 987 ; Hungr and Evans, 1 988 ; Pfeiffer and Bowen, 1 989 ; Pfeiffer et al., 1990; Azzoni and de Freitas, 1995) Figure 12.19

Ngày tải lên: 09/08/2014, 22:23

... 2 and 3 m, and the per-sistence of the J1 joint set was in the range of 10–40 m The joints were planar but rough, and contained no infilling Figures 14.16 and 14.17 show a sketch of the slope and ... less, and RMR of about 30 (i.e poor quality rock mass) Carbonaceous shales and mudstones were slightly more competent with UCS of about 25 MPa and RMR of about 40 Interseam siltstones and sand-stones ... a magnitude of 30 MN, and trend and plunge values of 210◦ and 15◦, respectively The trend coincided with the bridge axis that was not at right angles to the rock face, and the plunge coincided

Ngày tải lên: 09/08/2014, 22:23

... wedgeformed by planes 1, 2, 3 and 4 shown in Fig-ure III.1, but with no tension crack The shearstrength is defined by different cohesions and fric-tion angles on planes 1 and 2, and the waterpressure ... when the forces T and E are either zero or completely specified in magnitude and direction. (a) Components of unit vectors in directions of normals to planes 1–5, and of forces T and E. Trang 12(b) ... N1 > 0 and N2 <0, contact is main-tained on plane 1 only and the factor of safety is calculated as follows: (l) If N1 < 0 and N2 >0, contact is main-tained on plane 2 only and the factor

Ngày tải lên: 09/08/2014, 22:23

... recognize that the demand for their products and services is _ demand, which means that demand for their products and services results from the demand for their customers' products and services 1 ... 4 d Demand elasticity 5 e Derived demand The percentage change in sales relative to the percentage change in price is: 1 a Volatile demand 2 b Market demand 3 c Final demand 4 D Demand elasticity ... Typically, business marketers face: 1 a Hypothetical demand 2 b Highly elastic demand 3 C Derived demand 4 d Latent demand 5 e Primary demand In business markets, products are generally classified

Ngày tải lên: 11/03/2017, 11:25

... Relationships and Learning 4th Edition by Dwyer Multiple Choice Questions - Page Typically, business marketers face: a Hypothetical demand b Highly elastic demand C Derived demand d Latent demand e Primary ... recognize that the demand for their products and services is _ demand, which means that demand for their products and services results from the demand for their customers' products and services A ... marketing and consumer marketing? Answer Given Business marketers must recognize that the demand for their products and services is derived demand; that is, demand for their products and services

Ngày tải lên: 20/03/2017, 10:44

... class. Slip - ring motors, commutator motors and brake motors can all be made in flameproof versions. No external parts may cause sparks. The motors must have both an interna l and an external earthing ... sets the standards. Or at least many countries base their standards very closely on the IEC standards (for example, Germany's VDE 0530 standard and Great Britain's BS 2613 Standard closely ... though, the standards can be grouped into two major categories: NEMA and IEC (and its derivatives). In North America, the National Electric Man ufacturers Association (NEMA) sets motor standards,...

Ngày tải lên: 12/01/2014, 10:43

... Some highlights and new material in the book are outlined as follows. Chapters 1 and 2 contain standwu material on analysis of variance, one-way and multi-way layout, randomized block ... random variable. Since ~I can be expressed as a linear combination of y;'s and its mean and variance are given by (1.12) and (1.14), it follows that The estimated standard ... Design Matrix and Response Data, Whiteware Expetiment 498 Design Matrix and Response Data, Drill Experiment 499 Design Matrix and Response Data, Ammonia Experiment 500 Design Matrix and Response...

Ngày tải lên: 05/03/2014, 11:20

... risk 473 Ian F Godsland 37. Androgens: Studies in animal models of atherosclerosis 487 Peter Alexandersen 38. Androgens and blood pressure in men 501 Guy Lloyd 39. Androgens and arterial disease ... Ogata and Hirano, 52 not sufficiently acknowledged by the Europeans and Americans, found in 1934 that the androgen from the urine (Butenandt’s androsterone) was not identical with the androgen ... weak urinary 5α-reduced androgen comes from ‘andro’ = male, ‘ster’ = sterol, and ‘one’ = ketone. The chemical syn- thesis of androsterone was performed by Leopold Ruzicka and co-workers 3 years...

Ngày tải lên: 06/03/2014, 00:22

... provided in the Instructor’s Guide, and instructors may choose to provide students with these answers. NEW FEATURES This second edition has been updated and expanded and includes a new chapter, authored by ... statistics and epidemiologic rates are new to this second edition and other sections have been expanded. INSTRUCTOR’S GUIDE A guide for the instructor is a new feature to accompany this second edition. ... significant events and dates in human life. Births, deaths, marriages, and divorces are recorded and certifi- cates issued. Morbidity data is discussed in Chapter 9. Mortality rates and their com- putation...

Ngày tải lên: 06/03/2014, 07:20