computer wont turn on power supply works
Tài liệu The Computer Case and Power Supply pptx
... to computer devices. Step 1 The first step in the assembly process is to create an inventory of all computer components that will be installed into the computer. Lay out the computer components ... factor of the unit, and the voltage selector switch on the power supply. The inventory of all the components that will be installed in the computer case will also be discussed. Finally, motherboard ... _______________ USB Keyboard Connector _______ 5-pin DIN or ________ 6-pin mini DIN _______ USB (Make sure it matches the connector on the Motherboard). Power Supply AT __________ ATX...
Ngày tải lên: 21/12/2013, 19:15
Single phase uninterruptible power supply based on z source inverter
... operation, the rectifier provides power 0278-0046/$25.00 â 2008 IEEE 3002 IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 55, NO. 8, AUGUST 2008 Fig. 9. Simulation results. (a) Traditional UPS ... transfer function is W ou (s)=W u (s)W ci (s) 1 sC s (20) where W u (s) is the transfer function of the outer loop controller. The proportional–integral (PI) controller is adopted to con- trol the ... high efficiency, low harmonics, fast response, and good steady-state performance in comparison with traditional UPSs. The simulation and experimental results of a 3-kW UPS with the new topology confirm its validity. Index...
Ngày tải lên: 03/01/2014, 19:12
A digitally controlled switch mode power supply based on matrix converter
Ngày tải lên: 13/05/2014, 00:55
Power Supply Units Guide.
... công suất trực tuyến để tìm ra con số cần thiết ví dụ như: - http://www.jscustompcs.com /power_ supply/ - http://www.mymp3car.com/MP3Car/PSUpower.asp Trong thực thế, Khi đem một hệ thống ... công suất khoảng 430w vào bộ nguồn có chỉ số Continuous Power là 400w, chúng vẫn có thể hoạt động được trong khoảng thời gian ngắn nếu mức Peak Power của nguồn đạt trên 430w nhưng sau một ... EPS 12V 8 chân: Thường được sử dụng cho các bo mạch chủ workstation trên những hệ thống máy tính chuyên nghiệp với CPU Opteron hay Xeon. Gần đây, một số loại bo mạch chủ Desktop mới cũng bắt...
Ngày tải lên: 01/11/2012, 16:38
UPS (Uninterruptible Power Supply)
... Cách Test đơn giãn là dùng một điện trở tải (điện trở sứ trong các monitor CRT hay tivi) chừng vài chục ôm và vài chục W. Kẹp song song với que đo đồng hồ khi đo. - Nếu mức sụt áp <= 5% là ... cắm EPS 12V 8 chân: Thường được sử dụng cho các bo mạch chủ workstation trên những hệ thống máy tính chuyên nghiệp với CPU Opteron hay Xeon. Gần đây, một số loại bo mạch chủ Desktop mới cũng bắt Bộ ... vhoạt động v cung cp ngun cho ti. ã ON LINE: Inverter luụn hoạt động (on) cung cấp điện cho tải. UPS thông minh ã c iu khin bi phn mm qua cng USB hoc cng song song. ã Cho phộp chn oỏn UPS Cho...
Ngày tải lên: 27/04/2013, 11:36
Tài liệu tiếng anh Điện tử công suất mạch MERS Power supply for pulsed magnets with magnetic energy recovery current switch
Ngày tải lên: 15/10/2013, 16:11
Electronics - Digital Control of Switching Power Supply
... D/A converters or power control devices. The A/D Converter of ST52x420 is an 8-bit analog to digital converter with up to 8 analog inputs offering 8-bit resolution and a typical conversion time ... system parameters. Digital Control of Switching Power Supply - Power Factor Correction Stage Sangsun Kim and Dr. P. Enjeti Power Electronics and Power Quality Laboratory Department ... additional PFC boost converter in the system is A conventional SMPS employs a diode rectifier for ac to dc conversion. This type of utility interface generates harmonics and the input power...
Ngày tải lên: 27/10/2013, 16:15
Tài liệu Power Supply Block Diagram ppt
... R s constant. Since the voltage drop across R s is constant V stays constant H. Chan; Mohawk College 11 constant, V o stays constant. Comparison of Different Types of RectifiersComparison of ... flow through C and D. Basic PushBasic Push Pull Power ConverterPull Power Converter Operates as a class D power amplifier. Output rectifier converts the sq are a e to dc Each transistor m st ... dropout, higher in/output, and better regulation are available. Equations for Buck RegulatorEquations for Buck Regulator ttV T t tt t V V on offon on i o = + = Sl i I 04I hISelecting I L = 0.4I o where...
Ngày tải lên: 13/12/2013, 23:15
asg 2 electrical power supply
... Electrical power supply architecture 2.4 Power supply functions 2. Electrical power supply 6 2.4 Power supply functions There are three separate functions: b Supply and cut off the machine power ... Electrical power supply 7 b Power unit supply The table (C Fig. 5) summarises the power units and functions covering the requisite functions. 2.5 Power supply to the control circuit The power supply ... Electrical power supply 3 1 2 3 4 5 6 7 8 9 10 11 12 M 2.1 Introduction Page 2.2 Power supply to machinery Page 2.3 Standards and conventions Page 2.4 Power supply functions Page 2.5 Power supply...
Ngày tải lên: 15/02/2014, 08:33
Báo cáo "Application of power electronic components to control parameters and switching of compensation devices on power networks " doc
... valves. 3. Conclusion The application of power electronic components for controlling in the above mentioned cases brings certain benefits. Comparing with the manual switching method or contactors ... because of consuming a lot of reactive power. Therefore, not only the compensation devices should be installed on the primary side but also on the the secondary side. Commonly, compensation level ... The controlling of compensation devices could be implemented by power electronics structures controlling the firing angle of thyristor. In the next section, we introduce a power electronic...
Ngày tải lên: 05/03/2014, 14:20
Report on the FAO Workshop on Sea Cucumber Fisheries An Ecosystem Approach to Management in the Pacific (SCEAM Pacific)
... information in some occasions and some of the presentations needed thorough discussions on its own! Workshop definitely timely and very, very informative! Excellent information. I wish to personally ... action regardless of the capacity of the management institution. ? – Consider applying as an additional measure or action if the management institution has a strong capacity for implementation. ... countries focusing on certain species for which data are needed. Research is desired on connectivity of sea cucumber populations. Currently, connectivity among populations is reasonably well understood...
Ngày tải lên: 14/03/2014, 10:12
AN UPDATE ON POWER QUALITY pptx
... and malfunction in communication system. The degree of variation is assessed at the point of common connection, where consumer and supplier area of responsibility meet. The harmonics voltage ... induction generator is directly connected to grid. Harmonic measurements are required only for variable speed turbines equipped with electronic power converters. In general the power converters ... electronic power converter at the point of common connection. The total harmonic voltage distortion of voltage is given as in (4). 2 40 100 2 1 V h V THD V h (4) V h - h th harmonic...
Ngày tải lên: 17/03/2014, 02:20
Your PC, Inside and Out: Chassis, Power supply and Motherboard
... PCIE connectors can also be powered using 2 molex connectors if one isn’t available from the PSU itself, and molex to SATA power connectors are also quite common. SATA - This connector is ... particularly common on older power supplies, but as mentioned above it is possible to get a converter cable. Indeed, most budget cases still use this design, and for good reason – it’s a conventional, ... the more efficient the power supply is the less AC power it requires to provide sufficient DC power, meaning lower overall power consumption from the mains and a smaller power bill. The earth...
Ngày tải lên: 19/03/2014, 20:35
AN UPDATE ON POWER QUALITY doc
... and malfunction in communication system. The degree of variation is assessed at the point of common connection, where consumer and supplier area of responsibility meet. The harmonics voltage ... induction generator is directly connected to grid. Harmonic measurements are required only for variable speed turbines equipped with electronic power converters. In general the power converters ... been done on the control of active filters. Contents Preface VII Section 1 Power Quality Issues and Standards in the Electricity Networks 1 Chapter 1 Harmonics Generation, Propagation...
Ngày tải lên: 23/03/2014, 15:20
switching power supply of autonics guides
... tiếp và song song Chú ý khi sử dụng Chú ý khi lắp đặt Ngõ vào Ngõ ra Ngõ raNgõ vào Kết nối song song Kết nối nối tiếp Bộ nguồn ổn áp không được sử dụng kết nối nối tiếp và song song trong bất ... nó với đầu nối khác thì mạch bên trong sẽ bị hư hỏng. Nó làm việc với 2000VAC giữa đầu nối và vỏ hộp trong một phút, nhưng nó sẽ hư hỏng nếu quá áp được cấp trong vài phút. Bộ nguồn ổn áp có điện ... vào Sản phẩm này không có giá trị để hoạt động theo dạng điện áp ngõ ra song song và nối tiếp. Dòng điện ngõ ra phải được sử dụng trong phạm vi dải tỷ lệ. Khi nó hoạt động ở trạng thái quá dòng, quãng...
Ngày tải lên: 10/04/2014, 19:55
brown, m. (1990). practical switching power supply design
... EM1 Design Considerations 125 i07 109 Ill I I9 9.4 Power Supply and Product Safety Considerations 9.5 Testing Power Supply Units I 28 132 9.5. I Line Regulation 132 9.5.2 ... scaled to fit many more applications. The topics contained in the book range from considerations in capacitor and semiconductor se- lection to quasi-resonant converter design. This book has ... Applied to Power Supplies 10.4 The Control-to-Output Transfer Functions of Common Switching 136 Power Supply Topologies 148 10.4.1 Forward-hlode Control-to-Output Transfer Functions ( Voltage-Mode...
Ngày tải lên: 18/04/2014, 12:25
