semiconductors used in a switching power supply

... by using analog power factor correction (PFC) as shown in Fig [3] Analog PFC IC's which are manufactured by TI/Unitrode, Fairchild, and STmicroelectronics are available and have been able to provide ... 1000-3 and IEEE 519 standards specify link as harmonic compliance and THD To comply with the corresponding standards in Europe and North America several active solutions have been proposed [2] and ... improved power factor Analog control can provide continuous processing of signal, thus allowing very high bandwidth It also gives infinite resolution of the signal measured Analog control, however, also...

Ngày tải lên: 27/10/2013, 16:15

... underlying schema This allows more meaningful element names to be used resulting in code that is easier to read, use, and maintain Table 2-16 lists available annotations Table 2-16 Available annotations ... Default values and available annotations for elements of strongly typed DataSet objects Element Default name Annotatio n DataTable TableNameDataTable typedPlural DataTable methods NewTableNameRowAddTableNameRowDeleteTableNa ... NewTableNameRowAddTableNameRowDeleteTableNa typedName meRow DataRowCollect TableName ion typedPlural DataRow TableNameRow typedName DataColumn DataTable.ColumnNameColumnDataRow.ColumnName typedName Property...

Ngày tải lên: 24/12/2013, 05:15

... 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) ... đặt DIN rail Đặc điểm Kích thước nhỏ gọn, Chất lượng cao, Mang lại lợi nhuận Nguồn ngõ vào tự Có thể chạy với nhiều điều khiển Có mạch bảo vệ dòng bên Loại lắp đặt DIN rail lắp đặt ray Thông tin ... 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:...

Ngày tải lên: 10/04/2014, 19:55

... primary winding with an alternating input voltage and ground signal This means that only half the input voltage appears across the primary winding This results in an average and hence peak current ... approach to the switching power supply and avoid any last minute design changes downstream in the program Switching power supplies gained popularity in the early 1970s, coinciding with the introduction ... identical to that of a linear regulator The fundamental difference is that a linear regulator regulates a continuous flow of current from the input to the load in order to maintain a constant load...

Ngày tải lên: 18/04/2014, 12:25

... Marris talks about this form as a means of managing uncertainty and displacing risk downward (Marris, 1996) Increasingly, however, this organizational structure is proving inadequate, both as ... shared meaning in forums Political leadership: making and implementing decisions in legislative, executive, and administrative arenas Ethical leadership: adjudicating disputes in court and sanctioning ... exploring how best to describe and teach leadership are Stuart Albert, Rosita Albert, Ragui Assaad, Iman Ghazalla, Harry Boyte, Zbigniew Bochniarz, Arthur Harkins, Susan Atwood, June Nobbe, and Karen...

Ngày tải lên: 01/06/2014, 10:32

... 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 ... 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 supply applications ... resulting in a considerable power loss needing large heat sinks in relatively large and heavy power units 1.2.3 Power Dissipation in the Series-Pass Transistor A major limitation of a linear regulator...

Ngày tải lên: 08/08/2014, 06:20

... channel select bits are changed Using a data indexed statemachine saves redundant coding for each channel If the results from the ADC are stored in an array, the state variable can be used to automatically ... efficiently, a data indexed statemachine is used There are two standard forms of a statemachine, the execution indexed and the data indexed In the more recognizable execution indexed form, a state variable ... the routine will automatically poll through all of the system inputs By manipulating the state variable, the order in which the inputs are sampled, can be altered and some analog inputs can be...

Ngày tải lên: 11/01/2016, 16:38

... and roles of the original text Herein, a combination of principles retaining original meanings affirms that translation is a process as well as a product In general, translation renders meanings ... that translation is the transformation of a text originally in one language into an equivalent text in a different language retaining, as far as possible, the content of the message, formal features ... remarks on general principles needed to have a good selection It means that an acceptable translation must attain three main principles called meaning, form and register to make it natural and...

Ngày tải lên: 29/01/2014, 10:33

... however, that even if natural gas supplies are steady there still is a certain level of excess installed capacity available within the SING grid [11] In this case again creating (additional) interconnections ... potential in the Northern part of Chile Several CSP initiatives and activities already take place in countries such as India, Morocco, Spain, Iran, South Africa, Jordan, Egypt, and the USA, mainly in ... advantage of CSP (day2) in combination with (stored) hydropower (night) Moreover, by increasing installed capacity and by increasing the load factor of the already installed capacity within the...

Ngày tải lên: 05/09/2013, 14:58

... that similar to Table 5, the available wind power in this case is less compared to that in Tables and because the wind turbine diameter in this case is Da=8 ft compared to that in configurations ... surrounding the turbine has a significant effect in increasing the turbine power as well as the turbine efficiency which further increases with increase in ∆T Also, it can be seen that larger diameter ... 1.76 In Table 8, it should be noted that similar to Table 6, the available wind power in this case is less compared to that in Tables and because the wind turbine diameter in this case is Da =...

Ngày tải lên: 05/09/2013, 14:59

... 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 ... in the first and third regions (combustion and exhaust) has an increasing trend References [1] Habib M .A. , Said S .A. M., and AL-Bagawi J.J., Thermodynamic performance analysis of the Ghazlan power...

Ngày tải lên: 05/09/2013, 16:11

... a wind farm of HAWT using GA gives a uniform grid arrangement similar that obtained by Grady et al [2]; this is different than that obtained by Mosetti [1] who obtained a somewhat random arrangement ... of Engineering in department of Mechanical Engineering and Materials Science at Washington University in St Louis, MO, USA He is a Fellow of ASME, AIAA, IEEE, and SAE E-mail address: rka@wustl.edu ... University in St Louis He received B.S in Mechanical Engineering from Shanghai Jiao Tong University in China in 2008 and M.S in Mechanical Engineering from Washington University in St Louis in 2010 Xiaomin's...

Ngày tải lên: 05/09/2013, 17:03

... Hoa [10] defined meaning plays an important part in ‘saying’ has to be interpreted in a rather broad sense; it covers any communication because language without meaning is meaningless kind of symbolic ... be many Vietnamese linguists, especially by Cao Xuan Hao and Hoang Van Van Cao Xuan Hao [31] offerred an overview of functional approaches and solved the issues of applying Functional Grammar ... and are uttering a sentence, as for him, can be considered as a “speech act” As studying speech act theory, Austin broadly explains these utterances – speech acts as having three parts of aspects:...

Ngày tải lên: 26/11/2013, 13:19

... AEAP: As Early As Possible AFAICR: As far as I can recall / remember AFAICS: As far as I can see AFAICT: As far as I can tell AFAIK: As far as I know AFAIR: As far as I remember AFAP: As Far As ... such as military activities, scientific work, or medical terminology A A C?: AH! SI? AAF: As A Friend ADAD: Another Day Another Dollar ADIH: Another Day In Hell ADIP: Another Day in Paradise AEAP: ... sentence of paragraph 24 CHARCTERS MEANING ^ ^ or ^ ^ or ^^: An emoticon signifying happiness >^.^^.^

Ngày tải lên: 11/12/2013, 23:48

... heading Paragraph Tags: Thẻ đoạn văn This is a paragraph This is another paragraph HTML will automatically add a blank line before and after each heading Line Break Tags: ... (2004) points out: “Adaptation has a property of lending the ideas of the original to create a new text used to by a new language more than to be faithful to the original The creation in adaptation ... command-line mode performing desired operating system operations and producing program output on its standard output channel It may also function as a graphical application PHP is available as a...

Ngày tải lên: 11/12/2013, 23:48

... a wide range of competences with speaking in public, persuading and influencing others, making a case, chairing a meeting, sharing information 1.2 Types of Speaking In speaking class, according ... should find some information for their speaking activities It may be a paragraph, a magazine, a report, and a book…this show that, reading supports speaking by providing necessary information Students ... style and language used The factors include being face-to-face, saving face, permanence, interactivity in for amativeness, and context dependence in which both speaking and writing can be located...

Ngày tải lên: 11/12/2013, 23:51

... before eating Banh da is called banh da in northern because it is as hard as banian leaf after grilling, and banh trang (girdle cake) in southern because it is girdled thinly An interested translation ... Vietnamese cake Banh Giay is alike Banh Chung that made from glutinous rice, green bean and pork but round and wrapped in banana leaves Banh Giay is called Banh Day in accordance with relative language ... half-moon pancake is understandable and acceptable However, translating Banh Xeo (Banh Khoai) as Vietnamese pancake and country pancake is enigmatic and controversial Because Banh Khoai, anyway, is...

Ngày tải lên: 11/12/2013, 23:55

... certification of unions, labor-management relations, collective bargaining and unfair labor practices Workplace health and safety Employment standards, including general holidays, annual vacations, ... the name or designation of a concept in a particular subject field It may be a word, an expression, a symbol, a chemical or mathematical formula, a scientific name in Latin A term in a specialized ... Occupational safety inspectors Health inspectors 42 Thanh tra Nhà nư c lao động Thanh tra lao động Thanh tra an toàn lao động Thanh tra vệ sinh lao động The Ministry of Labor, War Invalids and...

Ngày tải lên: 11/12/2013, 23:55

... Standardandthecorrespondingnational indicated in the latter national regional and standards or regionalstandardshall Any beclearly 5) TheIECprovidesnomarkingproceduretoindicate its approvalandcannotberenderedresponsibleforany ... separate source AC withstand voltage according to table 2, or 4; - if applicable in table 1, a standard short-duration AC induced withstand voltage (ACSD) for the line terminals according to table2, ... participateinthispreparatorywork.International,governmentalandnon-governmentalorganizationsliaising with the IEC also participate in this preparation TheIEC collaborates closely with the International Organization...

Ngày tải lên: 25/12/2013, 10:34