design using the area product ap approach
TRANSFORMER AND INDUCTOR DESIGN HANDBOOK - COLONELWM t MCLYMAN
... properties in their catalogs The product of the window area, Wa, and the core area, Ac, gives the area Product, Ap, a dimension to the fourth power I have developed a new equation for the power-handling ... The magnetic circuit is the space in which the flux travels around the coil The magnitude of the flux is determined by the product of the current, I, and the number of turns, N, in the coil The ... Flux at the Gap The fringing flux effect is a function of gap dimension, the shape of the pole faces, and the shape, size, and location of the winding Its net effect is to shorten the air gap Fringing...
Ngày tải lên: 22/04/2014, 16:52
Design of a wide input supply range buck boost converter
... this application will be probed further Subsequent chapters will cover the design of the sub-blocks in the startup and regulatory control systems required in the proposed chip Finally, in the ... shows the voltage profile of the output storage capacitor as energy is harvested from the piezoelectric generator mounted on the shoes, rectified and stored in the capacitor [2] In this case, the ... 4.7µF (Note that the inductance and capacitance values used for the ideal simulations performed in this chapter will be the same, unless otherwise stated), the profiles observed at the various nodes...
Ngày tải lên: 04/10/2015, 15:44
DC bus control of variable speed wind turbine using a buck boost converter
... zones: the first is located on the right side of the MPP where dp/dΩ < and the second on the left side of the MPP where dp/dΩ > Fig gives the algorithm of the proposed MPPT control method, where the ... power between the operating power and the maximum power, in the event of change of the wind speed, the control of the buckboost converter perturbs periodically the operating point of the wind turbine ... between the rectifier output and the DC bus The control relationship between generator speed and the DC bus voltage is used to change the apparent DC bus voltage seen by the generator and thus the...
Ngày tải lên: 03/01/2014, 19:15
Research on a novel buck boost converter for wind turbine systems
... of Mode is the average output current of the inverter and can be expressed as, 230 vc is the capacitor voltage and is in the same order as the grid voltage The voltage stresses of the power semiconductor ... inverter are the same as those of the 4-switch buck-boost inverter presented in the previous section The voltage stresses of the power semiconductor devices in the charging control circuits are the same ... devices in the discharging circuits of the 3-switch buck-boost inverter and the 4-switch buck-boost inverter are somewhat different The blocking diodes in the discharging circuits of the two inverters...
Ngày tải lên: 03/01/2014, 19:16
nghiên cứu và thiết kế bộ biến đổi buck-boost pfc
... biến thiên theo điện áp lưới Vậy ta cần phải khảo sát đối tượng theo điện áp lưới để xác định trường hợp xấu nhất, sau thiết kế điều khiển 2.3 Mô hình hóa đối tượng mạch vòng điện áp Theo cấu trúc ... lưu trữ phần lượng sai khác đầu vào đầu Theo điều kiện tụ C tính theo công thức [1]: Po 106 C (F) 2ΔvoωVo (3.31) Trong đó: vC nhấp nhô điện áp đầu ra, theo yêu cầu toán vC 10 V Từ ta tính ... 4002 = =444 () P0 360 (3.5) 3.2 Thiết kế cuộn cảm Quá trình thiết kế cuộn cảm tiến hành theo phương pháp Ap [13] Trong trình tính toán cần cân đối vài tham số Ở đây, nhóm sử dụng bảng tính excel...
Ngày tải lên: 22/06/2014, 23:20
Dynamic performance improvement in boost and buck boost derived power electronic converters
... Introduction The size of energy storage elements is generally dictated by the rated operating conditions of the converter The larger the size of the elements, the more sluggish is the response Often, the ... is the supply voltage, D is the operating duty ratio, Vo is the average output voltage, L is the filter inductance, C is the output capacitance, and R is the load resistance As mentioned in Chapter ... For example, the up-stream system could be the ac mains power supply that requires the load to draw a current of low harmonic content in phase with the ac voltage On the other hand, the down-stream...
Ngày tải lên: 16/09/2015, 15:54
Thiết kế cấu trúc điều khiển bộ biến đổi buck boost
... van V III Thiếtkếbộđiềukhiểntheochếđộđiềukhiểnđiệnáp Sơđồkhốicầutrúcđiềukhiểntheođiệnáp : Ta cóhàmtruyềngiữađiệnápđầuravàhệsốđiềuchế : Dạngkháccủahàmtruyềnnày ta có : Theo đềbài ta có : Suyra : ... [mag,phase]=bode(Gvd,2*pi*800) ta Theo côngthức 3.102 trongbàigiảng ta có : Phacủabộđiềukhiểnlà 0,041 Ta cóđồthịbodehệhở Thiết kế cấu trúc điều khiển biến đổi Buck-Boost * Dùngbộbù PD loại ta :gócphabộbùsẽ them khâutíchphâncóphalà ... có : Theo đềbài ta có : Suyra : Thiết kế cấu trúc điều khiển biến đổi Buck-Boost Khikhôngcóbộbù, theođồthi bode tầnsốcắtlà 76,6 kHz Độdựtrữpha PM -57,60 Ta thiếtkếbộbù Lead PDđạtđượctầnsốcắtdướitầnsốfRHP...
Ngày tải lên: 10/04/2016, 23:46
Boost Your Marketing ROI with Experimental Design
... Experimental Design 151 How big should the sample size be to make the experiment valid? The answer depends on several characteristics of the test and the target market These may include the expected ... on the results of past marketing efforts; the expected variation among subgroups of the market; and the complexity of the design, including the number of attributes and levels In any event, the ... Biz Ware used the original percentages to create a general equation for estimating the results in all the cells When the new equation is then applied to the cells already tested, the results usually...
Ngày tải lên: 24/10/2013, 08:20
AN0804 design alternatives to the TC682 for performing inverting voltage doubler functions
... with the dual TC1220 solution at the expense of a higher active supply current (230 µA) than the dual TC1219 approach All other features of the dual TC1219 solution apply to the dual TC1220 approach ... the second TC1219 will automatically be powered down because the -5V bias to its GND pin is eliminated All other features of the dual TCM828 solution apply to the dual TC1219 approach, with the ... to the dual TC1219 approach, with the main difference being that the two TC1220s switch at a higher frequency (35 kHz) than the dual TC1219 This allows the designer to use smaller external capacitors...
Ngày tải lên: 11/01/2016, 14:26
AN1311 single cell input boost converter design
... mode) applies In the Discontinuous equation, there are three states, versus the two for Continuous mode • State 1: switch is ON, the current is ramping in the inductor, and the voltage applied ... by calculating the output power (VOUT * IOUT), dividing the product (output power) by the input voltage, and dividing the quotient by the estimated efficiency The final result is the average input ... changes in load, the peak current mode control provides a fast response The response is a function of the inductor value and the output capacitor value Since the compensation for the MCP1640/B/C/D...
Ngày tải lên: 11/01/2016, 16:55
EMBEDDED LINUX SYSTEM DESIGN AND DEVELOPMENT.pdf
... Linux System Design and Development Chapter 6, “Porting Applications,” discusses an application porting roadmap from a traditional RTOS to embedded Linux The rest of the chapter explains the porting ... to the company There is a gross misconception that embedded systems are all about the hardware or the operating system As computing power increases rapidly as per Moore’s law the amount of application ... that goes into the embedded system has also increased at the same rate Hence the applications have become the USP for the embedded system So building a xix xx Embedded Linux System Design and Development...
Ngày tải lên: 04/08/2012, 14:23
CMP book embedded systems design
... re-evaluation of the product features Sometimes, technologies don’t pan out, and an alternative approach must be found Since the alternative approach is generally not as good as the primary approach, design ... bus The port is memory mapped at address 0x400000 Eight bits of the word are the data portion of the port, and the other eight bits are the status portion of the port Even though the hardware designer ... existing products, rather than design new products Most of these engineers were not members of the original design team for a particular product, so they must rely on only their experience, their...
Ngày tải lên: 16/08/2012, 09:40
Implementing an 8 bit Processor based Design in an FPGA
... pins in the design that are not being used 12 Annotate the design using the Tools » Annotate Schematics Quietly command The Confirm Designator Changes dialog displays the following message: “There ... click on the Project button and select Add New to Project » C File Type the C code (as shown) into the new C file Save the code in the same directory as the other project files Using the default ... for errors) • Synthesize (create an EDIF netlist) • Build (translate the EDIF files, map the design to the FPGA, Place and Route the FPGA, run a Timing Analysis and then Make the Bit File) • Program...
Ngày tải lên: 17/08/2012, 09:12
Bao cao - Design Patterns.pdf
... mềm.Có thể gặp design pattern đâu đó, ứng dụng, sử dụng mẫu tương tự design pattern để giải tình mình, khái niệm cả.Trong nội dung đồ án môn học xin trình bày hiểu biết design pattern theo hướng ... khả xác định lớp Application chứa Sơ đồ tương tác sau cho thấy cách thức yêu cầu trợ giúp đựơc truyền dọc theo dây chuyền : Trong trường hợp này, hai đối tượng aPrintButton aPrintDialog không ... nghiệm lớp c Sơ đồ UML 14 Product (Page) - Định nghĩa giao diện đối tượng mà Factory Method tạo ConcreteProduct (SkillsPage, EducationPage, ExperiencePage) - Cài đặt giao diện Product Creator (Document)...
Ngày tải lên: 24/08/2012, 13:53
Design and Implement a SQL Server Database
... Tiếp theo thay đổi ghi vào transaction log file người ta gọi write-ahead log Cuối trình gọi Check Point Process kiểm tra viết tất transaction commited (hoàn tất) vào dĩa cứng (flushing the page) ... DATABASE Products ON ( NAME = prods_dat, FILENAME = server\mssql\data\prods.mdf', SIZE = 4, MAXSIZE = 10, FILEGROWTH = ) GO 'c:\program files\microsoft SQL Trong ví dụ ta tạo database tên Products ... cho Initial size, Automatically growth file Nhưng số production server hệ thống lớn kích thước database phải người DBA ước lượng trước tùy theo tầm cỡ business, thông thường người ta không chọn...
Ngày tải lên: 25/08/2012, 09:00
Brand Identity System Design
... hi u Brand Identity System | Design Brand Brand Identity System | Tiêu chu n BMG B tài li u BrainMark Vietnam biên so n c ki m tra ch t lư ng theo tiêu chu n c a BrainMark ... tình hu ng Brand Identity System | 17 Ý NGHĨA C A LOGO • Nhà thi t k thi t k logo ph i tuân th theo bư c thi t k , t t o d ng ý tư ng n phác th o, t o hình, … • V c u t o ng âm: Ph i nói lên ... System | 23 KÍCH THƯ C VÀ KHÔNG GIAN XUNG QUANH LOGO • Kích thư c logo : logo có kích thư c chu n theo t l layout nhà thi t k quy nh ây t l kích thư c quan tr ng b t bu c s d ng tương lai Ngoài...
Ngày tải lên: 27/08/2012, 09:00
Graphic Design Business Book
... obtain the space Speak to other designers operating similar businesses in the area to find out all you can Since some designers have their studios in their homes, it’s worth considering this as the ... T R O D U CT I O N ■ raphic design offers an unusual blend of challenges, from the creation of effective designs to the management of a business Graphic design gives you the chance to succeed ... good attorney The appendixes include the Code of Fair Practice for the graphic communications industry and a list of organizations that graphic designers might join or be interested in The Selected...
Ngày tải lên: 27/08/2012, 09:39