slot design of dc machine

... already mentioned, DC machines used to be in the past the major source of DC power. In order to produce electric power DC machines were operated as generators. Nowadays, however, use of DC generators ... Engineering  E Levi, 2001 1 STEADY STATE OPERATION OF DC MACHINES 1. INTRODUCTION Electric DC machines, as indeed any other type of electric machine, can be used to either produce electric energy ... more rare. DC power is obtained instead by means of power electronic converters. The remaining applications of DC machines are today restricted to motoring. In this operating regime a DC machine...

Ngày tải lên: 17/12/2013, 14:15

... INTRODUCTION The majority of this text concerns the analysis of electric machinery and drive systems. The focus of this chapter is the use of these concepts for design. In particular, the design of a permanent-magnet ... & Sons, Inc. INTRODUCTION TO THE DESIGN OF ELECTRIC MACHINERY 15 616 INTRODUCTION TO THE DESIGN OF ELECTRIC MACHINERY however, no design is better than any of the others in both mass and loss. ... (15.3-3) FORMULATION OF DESIGN PROBLEM 609 15.9.  FORMULATION OF DESIGN PROBLEM At this point, we are ready to consider the design of the machine. There are many ways to formulate the design problem....

Ngày tải lên: 16/02/2014, 18:55

... style of the sublanguage is distin- guished by cc~plex nominal dependencies with va- rious levels of coordination. In addition, most sentences are inoc~lete in that they consist of a series of ... This software tool not only allows for the separation of data and algorithms but also provides great flexibility in the organization of grammars and subgrammars, and in the control of the ... 1% of the corpus. A ccr~parison with the statistics of the French and Italian translations reveal approximately the sane distri- bution except for infinitival venbs. The higher frequency of...

Ngày tải lên: 17/03/2014, 19:21

Ngày tải lên: 08/08/2014, 13:20

... Reluctance Machines 400 7.3 DC Machines 404 7.3.1 Configuration of DC Machines 404 7.3.2 Operation and Voltage of a DC Machine 405 7.3.3 Armature Reaction of a DC Machine and Machine Design 409 7.3.4 ... Symbols D r outer diameter of the rotor [m] D ri inner diameter of the rotor [m] D s inner diameter of the stator [m] D se outer diameter of the stator [m] D1–D2 series magnetizing winding of a DC machine d thickness ... the flux, and part of the flux passes into the air. This is the case for instance when the teeth of electrical machines saturate: a part of the flux flows across the slots of the machine, even though...

Ngày tải lên: 07/03/2014, 10:20

... engineering education and of the text Machine Design: An Integrated Approach. He is a Fellow of the Ameri- can Society of Mechanical Engineers and a member of the Society of Automotive Engi- neers. ... engineering with emphasis on design, kinematics, and dynamics of machinery. He is the author of numerous technical papers and journal articles covering kinematics, dynamics of machin- ery, carn design and manufacturing, ... production machinery. He holds 13 U.S. patents. Norton has been on the faculty of Worcester Polytechnic Institute since 1981 and is currently professor of mechanical engineering and head of the design...

Ngày tải lên: 08/04/2014, 11:35

... the Laboratory of Design for Cognition. Professor Lahlou's current research interests are in the application of social sciences to the real world, and especially the design of human-friendly ... School of Industrial Design of the University of Montreal. She is doing her thesis on the autotelic experience, which is a dimension of the user experience. She is currently co-teaching a design ... eects of sleep loss 37 0 17.3 Relative risk of a fatigue-related fatal truck crash as a function of time of day 37 1 17.4 Relative risk of a fatigue-related fatal truck crash as a function of hours...

Ngày tải lên: 31/05/2014, 01:47

... hyperplane. 4. SUPPORT VECTOR MACHINES FOR DICHOTOMOUS WOS FILTERS 4.1. Linear support vector machines for dichotomous WOS filters In the above section, the new approach of designing WOS filter has reduced ... applications. In this paper, SVMs are introduced into the design of WOS filters in ordertoimproveperformance. WOS filters are special subset of stack filters. Each stack filter is based on a positive ... marginally im- proved by using the conventional design approach of stack filter or neural network. Although the adaptive neural fil- ter can effectively remove noise of various kinds, including Gaussian noise...

Ngày tải lên: 22/06/2014, 23:20

... continuity of the cam design at the segment interfaces. The values of each function at the beginning and end of each segment are grouped together for easy viewing. The fundamental law of cam design ... display of out- put data in the form of tables and plots. All the programs are designed to be user friendly and reasonably "crashproof." The author encourages users to email reports of any ... one sets out to design a piece of new equipment. First, he visualizes a series of complete machines with gaps where the problem or un- known areas are. During this time, a number of directions...

Ngày tải lên: 27/06/2014, 14:20

... the quality of the design. Commercially available programs such as Working Model* also allow rapid analysis of a proposed mechanical design. The process then becomes one of qualitative design by ... motor. There are a myriad of other examples of fourbar coupler curves used in machines and mechanisms of all kinds. One other example of a very different application is that of the automobile suspen- sion ... of the linkage assembly, and its motion is along a set of coupler curves. The orientation of the wheel is also of concern in this case, so this is not strictly a path generation problem. By designing...

Ngày tải lên: 08/08/2014, 12:23

... orientation of the link which contains the point of interest. The coupler curve is made to pass through a set of desired output points. However, it is common for the timing of the arrival of the coupler ... rotation of the input rocker, link 2, through an as yet unspecified angle ~z. Note also that the angle of the coupler link 3 at each of the precision positions is defined by the angles of the position ... the coordinates of vectors W, Z, D, and S, which define not only the lengths of those links but also the locations of the fixed pivots Oz and 04 in the plane and the lengths oflinks 3 and 1....

Ngày tải lên: 08/08/2014, 13:20

... moving centrode at one extreme of its path motion (i.e., at one of the positions ofh,3), then it will have a cusp in its coupler curve. Figure 6-17b shows a coupler curve of such a point, drawn with program ... out of metal, as shown in Figure 6-14d, and roll the moving centrode (which is link 3) against the fixed centrode (which is link 1), the complex motion of link 3 will be identical to that of the ... linkage. All of the coupler curves of points on link 3 will have the same path shapes as in the orig- inallinkage. We now have, in effect, a "linkless" fourbar linkage, really one composed of...

Ngày tải lên: 08/08/2014, 13:20

Ngày tải lên: 08/08/2014, 13:20

Ngày tải lên: 08/08/2014, 13:20

Ngày tải lên: 08/08/2014, 13:20

Ngày tải lên: 08/08/2014, 13:20

Ngày tải lên: 08/08/2014, 13:20

Ngày tải lên: 08/08/2014, 13:20

... 1 - 2 Overview of the Program 1 Overview of the Program SAP2000 is a stand-alone finite-element-based structural program for the analysis and design of civil structures. It offers an intuitive, ... Property Type for Add area of the form. Scroll down the list of import options until you find Import Double Angle – see Figure 7. Single click on it. D. In the Click to area of the Frame Properties ... to read this manual on your computer screen. During the course of this tutorial, we will explore many of the basic fea- tures of SAP2000. Prepare to spend at least one hour going through this...

Ngày tải lên: 06/09/2012, 15:56