performance design of dc machines by clayton hancock

Ngày tải lên: 05/09/2013, 16:11

... 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 ... 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 ... Electrical 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...

Ngày tải lên: 17/12/2013, 14:15

Ngày tải lên: 08/08/2014, 13:20

... 1  ϕ T (  x 1i )ϕ   x 2 j  . (53) The inner product of the two vectors induced in the fea- ture space can be replaced by the inner-product kernel de- noted by K(x, x i )anddefinedby K  x, x i  = ϕ(x) · ϕ  x i  . ... 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 ... only 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...

Ngày tải lên: 22/06/2014, 23:20

... Synchronous Machines 395 7.2.11 Synchronous 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 ... textbook by the important co-authorship of Professor Tapani Jokinen, who has spent decades in developing the Finnish machine design profession. An important view of electrical machine design is ... In most cases – because of the high permeability of iron parts – the reluctance R m of the magnetic circuit consists mainly of the reluctances of the air gaps. Thus, most of the energy is stored...

Ngày tải lên: 07/03/2014, 10:20

... system of Figure 1.5(a) and its stochastic linearization of Figure 1.5(b). The saturated root locus of the system of Figure 1.5(a) is the path traced by the poles of the quasilinear system of Figure ... problems, but from the point of view of design; both wide and narrow sense design problems are considered (problems P2 and P3). Chapter 7 addresses the issues of performance recovery (problems ... output variance. ã The performance of the actual system with an SLQR controller closely matches the intended design. ã The actual SLQR performance exceeds the actual LQR performance for all values of α. As...

Ngày tải lên: 23/03/2014, 15:20

... 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 successive ... synthesis and gen- eral linkage design by successive analysis. The fast computation of these programs al- lows one to analyze the performance of many trial mechanism designs in a short time and promotes ... Principles of Mechanism in 1841 while a professor of natural philosophy at the University of Cambridge, England. He attempted to systematize the task of mechanism synthesis. He counted five ways of obtaining...

Ngày tải lên: 08/04/2014, 11:35

... Work. As shown by the practical implementation of the segmentation results, the expected performance figures are affected by the size of the data packets and by the process- ing time of individual ... diversity of devices within the boundaries of a modern system-on-a-chip (SOC) brings up a great number of possible interfaces. System design and perfor mance are often limited by the complexity of the ... inclusion of the processing time and of the packet size in future versions of the algorithm comesasanecessity. Impact of Topology. A further improvement of performance is represented by a circular...

Ngày tải lên: 21/06/2014, 20:20

... platforms and im- prove flexibility. (iii) Design of a framework determines its performance and applicability. The design of key modules and entities of the resource management framework determines ... rates. Resource utilization by, and impor- tance of, a science application is determined by its mode of operation, which is summarized by Ta ble 1 . Table 1: Characteristics of science application. Mode ... scalability of the RACE framework by studying the impact of increase in number of nodes and applications in the system on RACE’s monitoring delay and actuation delay. We also studied the performance of...

Ngày tải lên: 22/06/2014, 00:20

... eight w 0 = 1andμ 1 = 0.3 Performance of CPIC, first stage Performance of CPIC, second stage Figure 7: BER performance of the first and second stage of the APIC as a function of the step-size. with ... ac- curacy of the BER derivation is validated by computer sim- ulations. The results showed a significant performance im- provement of the APIC over the CPIC receiver. The organization of this paper ... influence of the choice of the initial weight w 0 is shown in Figure 9, where the MSE performances Huahui Wang et al. 9 derivations. The effect of the design parameters of the APIC receiver, such...

Ngày tải lên: 22/06/2014, 19:20

... a reminder of the rank-1 approxima- tion. The advantage of the rank-1 performance criterion (15) is that it allows to derive an explicit expression as a function of the parameters of interest. ... mobile, it is of interest to evaluate the optimal spacings not only for a fixed position of users and interferers but also by averaging the performance met- ric over the positions of user and interferers ... attained by analyzing the interference power (not shown here). 6. CONCLUSION In this paper, we tackled the problem of optimal design of linear arrays in a cellular systems under the assumption of Gaussian...

Ngày tải lên: 22/06/2014, 19:20

... covering rate for the set of trials of the first design of experiments (Ta ble 2). These designs have been tested on 180 input images se- lected from a video sequence of over 30 000 city and mo- torway ... Therefore, each experiment design of ex- periments is well defined by its experiment matrix whose line number refers to the number of trials and column number refers to the number of tested par ameters. ... Proceedings of the ECCV Workshop on Performance Characteristics of Vision Algorithms, p. 13, Cambridge, UK, April 1996. [3] W. Forstner, “10 pros and cons against performance charac- terization of vision...

Ngày tải lên: 22/06/2014, 23:20

... Bandwidth 20 M Number of BS 1 Antenna height of BS 25 (m) Antenna gain 14 dBi Maximum total transmitting power of BS 46 dBm Number of RN 1 Antenna height of RN 3 m (above the train ... International Journal of Computer Science Issues. All Rights Reserved. 5. Conclusions This paper introduced two scenarios on the performance of RN and UE in two types of half- duplex relays. ... Performance Enhancement of LTE-A, a Multi-Hop Relay Node, by Employing Half-Duplex Mode Jaafar Adhab AL-Dhaibani 1 , A. Yahya 2 , R.B. Ahmed 3 , and A.S. Md Zain 4 1,2,3,4 School of...

Ngày tải lên: 09/07/2014, 08:10

... __________________ Abstract iii of forward error correction coding (FEC). System capacity (for BER = 10 −12 ) is shown to be 23 Gb/s without coding, and 75 Gb/s with a (255,239) Reed Solomon code. The effect of non-rectangular ... improving power budget, it is shown that system penalty due to filter shape may be kept < 1 dB by employing filters with N > 2. Moreover spectrum- sliced FSK systems using optical preamplifier ... receivers are shown, for the first time, to perform better in a peak optical power limited environment. Performance- optimized spectrum-sliced WDM systems have potential use in both local loop and long-distance...

Ngày tải lên: 06/08/2014, 00:20

... 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 successive ... 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

Ngày tải lên: 08/08/2014, 13:20

Ngày tải lên: 08/08/2014, 13:20

Ngày tải lên: 08/08/2014, 13:20