control of induction machine drives

... the machine currents which affect the performance of the control system considerably To achieve the fast torque control of the vector-controlled drives, a large bandwidth of the current controller ... ABSTRACT In this paper, a control scheme of a vector-controlled induction machine (IM) drives in overmodulation (OVM) range to maximize the voltage utilization of the voltage-source inverter ... [1-3] A vector control of AC machines is usually used for fast torque control over a wide operating range It can be applied for low and high power machine drive systems A fast current control is

Ngày tải lên: 25/11/2020, 18:41

... torque control of 3 phase induction motors require great understanding of the design and characteristics of these motors. 2 BRIEF THEORY OF VECTOR CONTROL (FIELD ORIENTED CONTROL) The control of ... 1Comparison of Direct and Indirect VectorControl of Induction Motor B Srinu Naik Abstract-Vector control is becoming the industrial standard for induction motor control The vector control technique ... decoupled control of flux and torque as in a dc machine Disadvantages 1 Fixing of number of sensors is a tedious job. 2 The sensors increase the cost of the machine. 3 Drift problem exist because of

Ngày tải lên: 05/08/2016, 11:07

... on the design of sensorless control schemes of the of induction motor drive to improve the stability and the robustness of the control system The advantages of speed sensorless induction motor ... conception for robust accurate tracking of induction motor drive operating in a high-performance drives environment Of the different methods for sensorless control of induction motor drive the model ... plant parameter variations of the induction motor In order to verify the performances of the proposed observer and control algorithms and to test behaviour of the controlled system, numerical

Ngày tải lên: 04/12/2022, 16:01

... enriching control methods of multiphase drives with the aim of highlighting advantages of multiphase drives in automotive applications Multiphase drives can meet the six requirements for electric drives ... facilitate the control of an energetic system In addition, the number of DoF are pointed out for the control This point is particularly important for multiphase machines whose number of DoF is high ... must be zero The fault reduces the number of DoF of the drive for control The number of DoF means the number of independent variables that can be used for control In this work, these variables are

Ngày tải lên: 23/03/2024, 10:33

... Servo Control for Machine Tool Feed Drives Control of machine tools originated with the invention of Numerical Controlled (NC) machines in the 1950s and was advanced to Computer Numerical Control ... Modeling of Linear Motor Feed Drives 16 2.2 Servo Control for Machine Tool Feed Drives 25 2.3 Design of Robust Control System 29 2.4 Sliding Mode Control 31 2.5 Adaptive Robust Control with ... 1970s (Liang et al 2004) Servo control of machine tool feed drives is one of the major functions of a CNC and it stays at the lowest level of the machine tool control hierarchy as shown in Figure

Ngày tải lên: 20/04/2017, 22:23

... influence of the temperature These factorsmake the control of induction motor complex and call for use of a high performance control algorithmssuch as “vector control” and a powerful microcontroller ... this system, the scalar control (V/Hz) of induction motor experiments with and explores the use of speed control The user can quickly start evaluating the performance of the V/Hz system with ... Voltage Versus Frequency Profile Under V/Hz Control 5 5 Torque Versus Slip Speed of an Induction Motor With Constant Stator Flux 5 6 Modified V/Hz Profile 6 7 A 3-ph Induction Motor V/Hz Drive

Ngày tải lên: 14/09/2020, 10:20

... the number of rows (height) of the matrix + N is the number of columns (width) of the matrix + f(x,y) is the intensity or color value of the pixel at coordinates (x,y) RGB images, often referred ... the process of memory.A digital image is a collection of points (pixels) when digitized The amount of information in digital images is huge An image consists of a continuous range of space and ... understanding of robotics and control systems for effective implementation.The work envelope of a five-bar robot is generally constrained and often features an irregular shape, which can limit the range of

Ngày tải lên: 20/12/2024, 10:54

... Potential of Biofumigants asAlternatives to Methyl Bromide for the Control of Pest Infestation in Grain and Dry Food Products Eli Shaaya and Moshe Kostyukovsky Abstract Fumigation is still one of the ... quick and effective tool for the control of stored-product insect pests In view of the scheduled phaseout of methyl bromide under the Montreal protocol, the role of phosphine in grain pro-tection ... fumigants of all oils tested The main component of one of the oils is pulegone The other is not yet identified and it is called SEM76 (Shaaya and Kostyukovsky, 2006) In our study of the mode of action

Ngày tải lên: 25/10/2013, 05:20

... 19, 2001.6,7 CONTROL OF MICROBIAL CONTAMINATION Microbial contamination of fruit can occur at all stages of growth, harvesting,storage, and processing The surfaces of fresh fruits are often contaminatedwith ... growth of a variety of spoilageorganisms, notably yeasts and molds Recent reports of outbreaks of illness TX110_book Page 73 Tuesday, May 6, 2003 9:21 AM Trang 2 caused by the consumption of fruits ... implementation of HACCP andapplication of alternative processes provide the current strategy for microbialcontrol and ensuring shelf life and safety of fruit juice and beverages.5–7pas-of the juice

Ngày tải lên: 25/10/2013, 21:20

... the balance of expression of members of the Myc/Max/Mad network of proteins (see Fig 1) may dictate the response to loss of Myc (Walker et al 2005) In mice, the effects of deletion of the c-myc ... the expression of MYC genes or that control the function of the encoded proteins The full spectrum of such mu-tations remains to be elucidated, since the regulation of any member of the MYC gene ... steps of early tumorigenesis by activating Myc simultaneously in a large group of cells or even entire organs A second important issue is whether both induction of apoptosis and induction of DNA

Ngày tải lên: 25/10/2013, 21:20

... in digital control of SMPS The Power Electronics & Power Quality Laboratory of Texas A&M University is currently exploring several implementation aspects of digital control of power factor ... also reduces the size of the power supply by containing the complexity of control system within the software Therefore, since digital control is much flexible than analog control, is becoming ... PFC control is the current industry choice but this type of control is not flexible Therefore, digital based control has many advantages with higher performance since the cost of digital controller

Ngày tải lên: 27/10/2013, 16:15

... placebo- controlled trials of ITB have more recently been con- ducted in spinal spasticity and have reported a sim- ilar magnitude of benefit (Ordia et al., 1996). Pharmacology of baclofen Baclofen ... injection of baclofen suggests that the drug takes about 1 to 2 hours to diffuse to the rele- vant layers in the dorsal horn of the cord. Excretion of ITB The plasma levels of baclofen in patients ... risk of low-pressure headache. An initial intrathecal trial dose of 25 or 50 μgof baclofen is used. The smaller initial trial dose should be used if the patient is not on oral baclofen, in case of

Ngày tải lên: 01/11/2013, 10:20

... This paper proposes an adaptive control method of partially known system and shows its application result to control of a two-wheeled welding mobile robot The controlled system is designed using ... and Motion Control of Mobile Robot for Lattice Type of Welding Line”, KSME International Journal, Vol 16, No 1, pp 83-93, 2002 [5] B.O Kam, Y.B Jeon and S.B Kim, “Motion Control of Two-Wheeled ... Feedback Control of Vehicles with Two Steerable Wheels”, Proc of the 1996 IEEE Int Conf on Robotics and Automation, pp 3105-3110, April 1996 [15] Y Zheng and P Moore, “The Design of Time-Optimal Control

Ngày tải lên: 10/12/2013, 13:16

... Systems of Reporting for Project Control 2080 67.5 A SURVEY OF COMPUTER SOFTWARE FOR THE MANAGEMENT CONTROL OF PROJECTS 2083 CHAPTER 67 MANAGEMENT CONTROL OF PROJECTS Joseph A Maciariello Horton Professor ... types of recognition of functional personnel by project managers and by peers Many of the new dimensions of control systems that are required in the control of complex projects are found in the control ... with the stakeholders of the project The development of effective and efficient project controls begins with the determination of the goals of each of the stakeholders of a project The project

Ngày tải lên: 17/12/2013, 14:15

... block of work represented on the network, derivedfrom the WBS, is authorized The project-control process then turns to activities of control Projectoffice personnel are concerned with controlling ... specifictasks of the many projects of the organization As the network relationships indicate, however, ac-tivities of one functional organization are dependent on the completion of activities of other ... concerned with achieving all demands of the projects of an or-ganization within the resource constraints of the function at minimum disruption to the plans of each of the organization's projects Resource

Ngày tải lên: 17/12/2013, 14:15

... Variation of DC bus voltage of a 3-in case of open loop PI 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 ... developments in speed control methods of the induction motor have led to their large scale use in almost all electrical drives Out of the several methods of speed control of an induction such as ... 4.15: Variation of Stator current 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...

Ngày tải lên: 18/12/2013, 22:06

... classification of vibration signatures result summary 88 Table 6.1: Similarity measures of same-indexed pair of machine current IMFs at 20Hz 98 Table 6.2: Similarity measures of same-indexed pair of machine ... currents of the induction motor This method is referenced from Peter Vas, “Parameter Estimation, Condition monitoring, and diagnosis of Electrical Machines” Using the dynamic model of an induction machine, ... measures of same-indexed pair of machine current IMFs at 40Hz 98 Table 6.4: Frequency band for HTY30 (IMF 5-9) machine current signature 100 vi LIST OF FIGURES Figure 1.1: Approaches of this...

Ngày tải lên: 03/10/2015, 21:57

... classification of vibration signatures result summary 88 Table 6.1: Similarity measures of same-indexed pair of machine current IMFs at 20Hz 98 Table 6.2: Similarity measures of same-indexed pair of machine ... currents of the induction motor This method is referenced from Peter Vas, “Parameter Estimation, Condition monitoring, and diagnosis of Electrical Machines” Using the dynamic model of an induction machine, ... measures of same-indexed pair of machine current IMFs at 40Hz 98 Table 6.4: Frequency band for HTY30 (IMF 5-9) machine current signature 100 vi LIST OF FIGURES Figure 1.1: Approaches of this...

Ngày tải lên: 04/10/2015, 07:58

... and speed control of induction motors The induction motor equivalent circuit The current control algorithm The new sensorless motor control strategy Induction motor controller ... open-loop control systems 4 Neural and Fuzzy Logic Control of Drives and Power Systems (E) The method of generating the control pulses: • Single-channel control systems • Multi-channel control ... electrical drives, especially for a.c electrical drives 1.3 Control systems for a.c drives A specific definition of a process control system may be: ‘A control system is a combination of amplifiers,...

Ngày tải lên: 18/04/2014, 12:29