dynamic modeling of induction motors

... Member of the Center for Computer Systems Security (CCSS) of the Information Sciences Institute (ISI) of the University of Southern California He is a Fellow of the Institute of Electrical ... rate of decay of correla- tion and mutual information does not appear to hold with- out a stronger version of mixing, it is believed that mutual information adds, next to rate of decay of correlation, ... taken as definitive proof of the deployability of mutual information-based detection mechanisms. Rather, the intent of this paper is to illustrate the potential utility of signal processing techniques...

Ngày tải lên: 22/06/2014, 23:20

... the case of squirrel-cage induction motors, with virtually maintenance-free operation. If operated with stator three-phase voltage supply of fixed frequency and fixed rms value, induction motors ... principle of operation of an AC-AC controller is very simple, analysis of the system of Fig. 6.5 is extremely tedious even for steady-state operation. This is so because of the inductive nature of the ... the required rms value of the fundamental harmonic of the output phase to neutral voltage of the AC-AC voltage controller. Induction machine Fig. 6.5: Speed control of an induction machine by stator...

Ngày tải lên: 11/07/2014, 05:20

... Diagnosis of Induction Motors using Signal Processing based Methods and Optimal Feature Selection 울산대학교 대학원 전기전자정보시스템공학부 웬옥투 최적 특징 선택과 신호처리기법을 이용한 유도전동기 고장 진단 Fault Diagnosis of Induction Motors ... (HHI) for supporting the faulty motors I would like to thank the examiners of this thesis, Professor Young-Soo Suh, Professor Jin Hur, Professor Myeong-Jae Yi, and Professor Heung-Geun Kim for their ... Diagnosis of Induction Motors using Signal Processing based Methods and Optimal Feature Selection Ngoc-Tu Nguyen A thesis submitted to the School of Electrical Engineering in fulfillment of the...

Ngày tải lên: 13/11/2014, 06:43

... CONSTRUCTION A N D STEADY-STATE OPERATION OF INDUCTION MOTORS Construction and operating principles of induction motors are presented in this chapter The generation of a revolving magnetic field in the ... introduced for determination of steady-state characteristics of the motor Operation of the induction machine as a generator is explained 2.1 CONSTRUCTION An induction motor consists of many parts, the ... periphery of the stator) The coils are displaced in space by 120° from each other They can be connected in wye or delta, which in I CONTROL OF INDUCTION MOTORS FIGURE 2.4 Two-pole stator of the induction...

Ngày tải lên: 12/02/2020, 23:02

... Diagnosis of Induction Motors using Signal Processing based Methods and Optimal Feature Selection 울산대학교 대학원 전기전자정보시스템공학부 웬옥투 최적 특징 선택과 신호처리기법을 이용한 유도전동기 고장 진단 Fault Diagnosis of Induction Motors ... (HHI) for supporting the faulty motors I would like to thank the examiners of this thesis, Professor Young-Soo Suh, Professor Jin Hur, Professor Myeong-Jae Yi, and Professor Heung-Geun Kim for their ... Diagnosis of Induction Motors using Signal Processing based Methods and Optimal Feature Selection Ngoc-Tu Nguyen A thesis submitted to the School of Electrical Engineering in fulfillment of the...

Ngày tải lên: 17/06/2021, 16:22

... properties of the onbody channel dynamics scenarios, for example on the path loss and variance of the channel fading 4.4 Dynamic Body Scattering Modeling The dynamic body scattering is an extension of ... analytical model of onbody transmissions on the trunk of a walking human We investigated the impact of the antenna locations and polarizations, as well as of the body posture and motion The dynamic scattering ... distributions of on-body channels and patterns of the body movements The importance of the polarization has also been addressed by most WBAN studies [6] Yet, the investigations are not sufficient because of...

Ngày tải lên: 21/06/2014, 07:20

... minu tes are 63 (76% of regu- lated genes), 146 (76% of regulated genes), 54 (98% of regulated genes), 123 (82% of regulated genes), 164 (87% of regulated genes), and 209 (92% of regulated genes), ... what is the purpose of such signal entanglement. Machine learning approach: modeling of regulatory gene influences through predictive models Dynamical predictive modeling of regulatory gene networks ... http://genomebiology.com/content/11/12/R123 Page 7 of 19 State-space models (SSM) are a general category of machine l earning algorithms that model the dynamics of asequenceofdatabyencodingthejointlikelihoodof observed and hidden...

Ngày tải lên: 09/08/2014, 22:23

... Two common types of non-repudiation evidence are the evidence of proof of creation of a message and evidence of proof of receipt Non-repudiation often involves the participation of a trusted third ... Although modeling tools are getting better and offer a wide variety of capabilities, it is often difficult or impossible for modeling tools to take into account the vast richness and diversity of individual ... carried the traffic of hundreds or thousands of users Today's Internet-connected user considers a dedicated, dial-up 28.8-Kbps line a pauper's connection Of course, the profiles of a typical user...

Ngày tải lên: 24/10/2013, 07:20

... Mở đầu/ Introduction Các hệ thu nhỏ kích thước / Scaling issues for MEMS g Mô hình hóa mô phỏng/ Modeling d Simulation M d li and Si l ti Thiết kế qui trình chế tạo/ Process integration Kết luận/Conclusions ... Mắc song song (paralell): áp dụng cho trường hợp chia sẻ biến tác động (effort) Định luật Kirschhoff ∑I =0 Áp dụng với mạch kín: ∑ V = Áp dụng cho dòng nút i: i i -F + ek + em + eb = 4.3 Mô hình ... PATRAN, hyperMESH, Dyna-3D… Được viết chủ yếu ngôn ngữ FORTRAN Các bước thực Xây dựng mô hình (modeling) đối tượng cần tính toán nhập thông số toán, vật liệu đặc trưng (Material Properties),...

Ngày tải lên: 23/04/2014, 10:18

... people specify and use motors in an infinite variety of applications The material presented in this text will provide the designers of systems containing motors a wealth of information about how ... the inclusion of this material would dilute the primary focus of this book, which is to understand the intricacies and tradeoffs in the magnetic design of brushless permanent-magnet motors I hope ... and three-phase motors minimize the number of power electronic devices required to control the winding currents The choice of magnet poles offers more flexibility Brushless PM motors have been...

Ngày tải lên: 02/07/2014, 08:20

... the base of the teeth is greater Figure 2.11 A comparison of various carter coefficients 24 Chapter T Base of Tooth Flux Figure 2.12 Flux squeezing at the base of a tooth by a factor of (1 — ... permeability of the core material is several orders of magnitude greater than that of the air gap As a result, the core reluctance has little effect on the solution, and more accurate modeling of the ... function of the past history of the field intensity Because of this behavior, the magnetic properties of ferromagnetic materials are often described graphically in terms of their B-H curve, hysteresis...

Ngày tải lên: 02/07/2014, 08:20

... Trapezoidal Motors In practice there are two common forms of brushless PM motors: motors having a sinusoidal back emf, which are commonly referred to as ac synchronous motors, and trapezoidal back emf motors, ... wealth of information regarding the design of many aspects of brushless PM motors In this chapter, this information is brought together to illustrate motor magnetic design In the process of doing ... as there are motors themselves Given the body of information provided in this chapter and Chap 4, it is possible to develop equations for the design of brushless permanent-magnet motors Chapter...

Ngày tải lên: 02/07/2014, 08:20

... simple elegance of (7.3) and (7.8) is due to the pure sinusoidal content of the back emf and phase currents Because of this elegance, a great deal of work goes into the design of some motors to minimize ... historical dominance of three-phase induction and synchronous motors and the minimal number of power electronic devices required are likely contributing factors The addition of a third phase provides ... current For two-phase motors, two H bridges are required, giving a total of eight switches to be implemented by power electronic devices Three-Phase Motors Three-phase motors overwhelmingly dominate...

Ngày tải lên: 02/07/2014, 08:20

... inductance (H) Number of turns Number of magnet poles Number of pole pairs Number of phases Number of slots Number of slots per magnet pole Number of slots per phase Nsp N Number of slots per pole ... 22-27, Universal City, CA This set of note is used by the authors in day long short courses The basics of magnetic circuit modeling are covered A very good discussion of permanent magnets and magnetizing ... Control of Electrical Drives, Springer-Verlag, New York A classic text on the control of all common motor types Li Touzhu, and G Slemon (1988), "Reduction of Cogging Torque in Permanent Magnet Motors, "...

Ngày tải lên: 02/07/2014, 08:20

... There are an infinite number of variations resulting from an infinite number of assumptions and performance tradeoffs Many of these variations are the result of years of engineering effort and insight ... terms of the flux linked by one coil due to the current in another Air gap mutual inductance is a function of the relative placement of the slots and therefore is a function of the number of phases ... following calculation of end turn resistance Each end turn bundle has ns conductors having a maximum length of O.ÔTTTp Thus application of (4.26) gives the approximate resistance of a single end turn...

Ngày tải lên: 02/07/2014, 08:20

... Wildi also presents the two types of induction motors: “the squirrel cage induction motor” and the “wound motor” An explanation of the advantages and disadvantages of each is given Essential concepts ... revolution Based on this, the software section of the design must interrupt the speed of the rotor based on the number of pulses it receives The rated speed of the induction motor used in this ... flux in the air-gap of the induction motor In this section of the report, through the use of scopes placed on nodes of interest, we will see that FO applies this principle of speed operation If...

Ngày tải lên: 27/10/2013, 23:15

... part of the revision of 16+ examinations Prior to this point, there had been a twin system of qualifications at 16+; the General Certificate of Education (GCE), for the ‘top’ 25% of ability of ... General Certificate of Secondary Education Awarding Bodies One of the immediate outcomes of this project was the development by one of these awarding bodies of a new form of syllabus and examination ... without the whole-hearted professionalism of all the members of the research teams that we assembled for the projects Some individuals have been at the heart of many of our projects, and none more...

Ngày tải lên: 24/03/2014, 02:20

... due to the inuence of Professor Horst Rittel, my professor at the University of California at Berkeley during my formative undergraduate days, who instilled much of the basis of this philosophy ... level of buffering as a function of machine efciency, line efciency, the number of machines in the system, and CVup and CVdown is introduced It leads to a reduction of lean buffering by a factor of ... the operation of the production line dened by assumptions (i)(vi) of Section Then, a set of representative distributions of up- and downtime was selected and, nally, for each member of this set,...

Ngày tải lên: 08/04/2014, 12:26

... Number -of- CBh ( CurBlock-level loop in the horizontal direction) …… … end of Number -of- CBh end of Number -of- CBv end of Number -of- SRh end of Number -of- SRv end of Number -of- MB h end of Number -of- MB ... understand the complexity of the system and each module The profiling tools can be, for example, common run time profile tools on workstation and PC, instruction profiling tools, iprof [10], or Intel® ... consists of off-chip memory, on-chip memory, and registers [12], as shown in Figure Different memory types have different features Off-chip memory, usually DRAM, offers a large amount of storage...

Ngày tải lên: 05/05/2014, 13:35