a walk through a representative switching power supply

... in Fig [3] Analog PFC IC's which are manufactured by TI/Unitrode, Fairchild, and STmicroelectronics are available and have been able to provide improved power factor Analog control can provide ... IEEE 519 harmonic limits II Analog and Digital Control Traditionally, the implementation of switching power supply has been accomplished by using analog power factor correction (PFC) as shown ... controller can guarantee higher bandwidth and higher switching frequency for ac/dc power supply References [1] Jigna Patel, "The Hottest Markets for External Power Supplies Now ans a Look at Potential...

Ngày tải lên: 27/10/2013, 16:15

... điện môi Chấn động Va chạm Ảnh hưởng điện từ LED Xanh (Gi a ngõ vào đầu nối ngõ 500VDC) Trong phút 3.0kVAC 50/60Hz (Gi a ngõ vào đầu nối ngõ ra) phút 1.5kVAC 50/60Hz (Gi a ngõ vào đầu nối F.G) ... ra, mạch giới hạn áp (SPA - 075/100) nóng Tiêu chuẩn an toàn IEC 60950, IEC 50178 EMS (Electromagnetic Suscetibility) EN61000 - - EMI (Electromagnetic Interference) EN6100 - - Điện áp ngõ ra: ... 240VAC 50/60Hz (85 - 264VAC) Chỉ thò ngõ - Ngõ DV ON, LED ON Cách lắp đặt vào ray Để lắp đặt nguồn ổn áp ray, trước tiên đặt nguồn ổn áp vào phần ray ấn theo chiều Để tháo nguồn ổn áp từ ray,...

Ngày tải lên: 10/04/2014, 19:55

... in an approach to packaging the power supply and provide some idea as to the final cost of the supply This effort can act as an early roadmap during the design phase and also saves time because ... Switching Power Supplies? All of these advantages make the switching power supply a much more versatile choice, with a wider range of applications, than the linear supply The disadvantages of the switching ... the supply dur9 10 A Walk through a Representative Switching Power Supply VlA TI output Output Current sense Voltage sense clrcult I Figure I A walk through a representative switching regulator...

Ngày tải lên: 18/04/2014, 12:25

... Diana for feeding the brute and allowing him to neglect her, yet again! This page intentionally left blank About the Authors Abraham I Pressman was a nationally known power supply consultant and ... result, all DC voltage levels are predictable and calculable This lower RFI noise can be a major advantage in some applications, and for this reason, linear regulators still have a place in modern power ... at the Universidad Catolica de La Paz ´ and English as a second language at CIBNOR biological research institution of La Paz, where he also worked as an editor of graduate biology students’ articles...

Ngày tải lên: 08/08/2014, 06:20

... the ADC are stored in an array, the state variable can be used to automatically access the correct location for storing the data, retrieving the next input configuration value, and accessing alarm ... read and stored in the first call to the GET_INPUTS routine After the ADC, the op amps and comparators are enabled and configured For this design op amp and comparator are used, with op amp and ... The analog PWM module in the PIC16F785 can accept feedback from either single comparator, or both, for either PWM channel This means; a) Each comparator can be dedicated to a separate channel...

Ngày tải lên: 11/01/2016, 16:38

... IEEE-IA TRANSACTIONS paper published in mid-year 1994 to mid-year 1995, the IEEE-IAS Magazine Prize Article Award in 1996, the Class of 2001 Texas A& M University Faculty Fellow Award for demonstrated ... engaged in teaching, research and consulting in the area of power electronics, motor drives, power quality, and clean power utility interface issues His primary research interests are advance ... via a filter capacitor is selected by the following equation [7]: (33) where is the power rating, is the peak of input voltage, and is angular input frequency and input current I RATANAPANACHOTE...

Ngày tải lên: 13/05/2014, 00:55

... the area of pattern avoidance Vll viii A Walk Through Combinatorics I only wish that when I was a student beginning to learn combinatorics there was a textbook available as attractive as Bona's ... opponents played (and not games), we can assume that any two teams played each other at most once The 18-game-average means that all the m Division One teams together played 9m games as a game involves ... teams Omitting T, we are left with m — teams, who played a grand total of at least 9m — games This means that the remaining teams still played at least 18 games on average against other remaining...

Ngày tải lên: 12/06/2014, 16:16

... systems and image-analysis methods - a revolution in scale analogous to the development of the microarray We have become accustomed to image-analysis packages that can find spots on a microarray, ... Nuclear relocation of a transactivator subunit precedes target gene activation Proc Natl Acad Sci USA 2001, 98:12120-12125 59 Dernburg AF, Broman KW, Fung JC, Marshall WF, Philips J, Agard DA, ... ribosomal RNA is transcribed from the tandemly repeated rRNA genes [37] Although it can be argued that this is a special case, other non-rDNA-bearing chromosomes associate near the nucleolus For example,...

Ngày tải lên: 14/08/2014, 14:21

... Christian doctrine, he was able to change him from cannibalism to a real Christian man who believed in God Master servant relationship in “ Robinson Crusoe” can also be seen as a relation of capitalism ... it and maintain a very successful way of obtaining food Among such hardships emerged his will and admirable effort He always believed: “labor and patience carried me through (1- p.87) He also ... concerning He always had objectives to attain and to better his actual life: a fine place to live in, good and delicious food to eat and to drink, etc Most notable, he made a candle by saving the tallow...

Ngày tải lên: 26/11/2012, 12:02

... products can be evaluated A 300 MW pulverized coal fired power plant located in Yiyang (China) was studied by Zhang et al [5] A cost analysis method based on thermodynamics on the power plant was investigated ... m_ghazikhani@Ferdowsi.um.ac.ir M Ahmadzadehtalatapeh is Master of Science in Mechanical Engineering He is lecturer in Chabahar Maritime University, IRAN His main research interests are heat exchangers ... Mechanical Engineering, Ferdowsi University of Mashhad, IRAN His main research interests are internal combustion engines and power plant analysis based on thermodynamic laws E-mail address: m_ghazikhani@Ferdowsi.um.ac.ir...

Ngày tải lên: 05/09/2013, 16:11

... soldiers; and each with its outlying factories had a staff of perhaps a dozen factors, as many sub-factors, twice as many assistants, and a few bookkeepers and auditors, as well as a corps of white artisans ... and reasonable A ship captain after paying for a license and buying the king's private stock of slaves at somewhat above the market price would have the news of his arrival spread afar, and at ... east coast of Africa as far south as Mozambique, for distribution in Arabia, Persia and CHAPTER I western India On these northern and eastern flanks of Guinea where the Mohammedans operated and...

Ngày tải lên: 08/03/2014, 00:20

... German Health Survey- 1998, 228 (4.0%) MCS and PCS datasets were missing; therefore analysis was based on 6,836 consecutive patients Statistical analysis All binary and categorical variables are ... was used as the level of significance To compare PCS and MCS between emergency department patients and data in the German Federal Health Survey, a multifactor analysis of variance (ANOVA) was ... consecutive admissions in a level 1-Trauma-Center, USA) as well in rural settings (Poole GV et al [11], 1993: 200 trauma patients in a university hospital and level I trauma center, USA; Sayfan and Berlin...

Ngày tải lên: 20/06/2014, 15:20

... to value their own health state on a visual analogue scale (EQ-VAS) The EQ-VAS records a respondent’s self rated valuation of health status on a scale ranging from (worst imaginable health state) ... 2000-158-CE), Departament de Salut, Generalitat de Catalunya, Spain, and other local agencies and by an unrestricted educational grant from GlaxoSmithKline More information is available at: http://www.epremed.org ... general population norm, indicating markedly impaired physical health status, the mean MCS score was similar to the general population norm, indicating that mental health status was not worse than...

Ngày tải lên: 20/06/2014, 15:20

... satisfaction and community satisfaction [35] Inhabitants of the affluent German South-West (BadenWuerttemberg, Bavaria, Hesse/Rhineland-Palatinate/Saarland, and North Rhine-Westphalia) were most satisfied ... spirituality and least satisfied with work and finances Health, partnership, and family were rated as most important for MiL, home/garden and leisure time were least important In multifactorial analyses ... with cancer and palliative care patients More specifically, the study aimed (i) to evaluate and categorize individually important MiL areas, and (ii) to examine differences between sociodemographic...

Ngày tải lên: 20/06/2014, 16:20

... distributed salt and pepper noise at different densities for evaluating the performance of the algorithm Three images are selected They are Lena, Cameraman, and Boat image A quantitative comparison ... Signal-to-Noise Ratio, Mean Square Error, Mean Structure Similarity Index, and Image Enhancement Factor and Computational time Both visual and quantitative results EURASIP Journal on Advances in Signal Processing ... USA, 1990 [2] J Astola and P Kuosmanen, Fundamentals of Nonlinear Digital Filtering, CRC Press, Boca Raton, Fla, USA, 1997 [3] N C Gallagher Jr and G L Wise, A theoretical analysis of the properties...

Ngày tải lên: 21/06/2014, 16:20

... impairment in Australian populations Med J Aust 1977, 2:392-394 Australian Bureau of Statistics: Estimated Residential Population by age and sex Canberra, Australia 1999 Australian Bureau of Statistics: ... Population and Housing Selected Social and Housing Characteristics for Statistical Local Areas South Australia, 2001 Canberra: Australian Bureau of Statistics; 2002 Report No.: Cat No 20154 Adams ... Charles J, Knox S, Valenti L, Henderson J, Pan Y, Bayram C, O'Halloran J, Ng A: General practice activity in Australia 2004-05 Australian Institute for Health & Welfare, AIHW Cat No GEP 18 Canberra;...

Ngày tải lên: 13/08/2014, 10:20

... circumcircles of triangles ABH, BCH, CAH all have equal radii as they are reflections of the circumcircle of ABC over the triangle’s sides Thus their images are lines that all have the same distance from ... of a scalene triangle ABC Point K on the ray CA satisfies KC = BC Similarly, point L on the ray BA satisfies BL = BC Prove that KL is perpendicular to OI where O and I denote the circumcenter and ... We calculate s DK = BD − BK = Now we observe A0 KI ∼ r2 computation, as A0 K = DK distances yz(s + x) A0 K = , s(z − y) and now we can express A0 B = y(zx + sy) , s(z − y) p (A0 , ω) − p (A0 ,...

Ngày tải lên: 15/08/2014, 16:55

... their tasks and combats Methods of guaranteeing medical materials for K20 are built based on acquiring previous medical guarantee methods that are to guarantee medical materials both in cash and ... examination room, a treatment room, a laboratory, a fundamental medicine storage guaranteeing medical examination and treatment at K20 infirmary - Regarding human resources, there are 60 medical officers ... medical standards and norms, professional regulations - Didactic materials on guaranteeing ordnance task in the Military, on organizing command of military health and military medical ordnance...

Ngày tải lên: 29/09/2014, 16:23