pc not turning on power supply

... 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

... 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 ... take only Modular Power Supplies Modular power supplies, on the other hand, have detachable power connectors. This has the added benefit that you can have exactly the connectors you need, and nothing ... 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

Ngày tải lên: 13/05/2014, 00:55

... 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 ... Pentium III hoặc Athlon XP). - WTX: jack chính 24 chân, dùng cho Pentium II, III Xeon và Athlon MP. - ATX 12V: jack chính 20 chân, dây phụ 4 chân 12v (Pentium 4 hoặc Athlon 64) - EPS12v: jack...

Ngày tải lên: 01/11/2012, 16:38

... 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 ... 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 ... như “Wake on Modem”, “Wake on LAN”. Đó cũng là lý do bạn không nên làm việc với thùng máy khi chưa rút điện lưới AC cung cấp cho PSU. Dòng điện này còn cấp cho các khe cắm card PCI, do đó...

Ngày tải lên: 27/04/2013, 11:36

Ngày tải lên: 15/10/2013, 16:11

... 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

... 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 ... 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 ... 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...

Ngày tải lên: 13/12/2013, 23:15

... Power Supply Estimated time: 45 Minutes Objective In this lab, identify the type of computer case to be used, the form factor of the unit, and the voltage selector switch on the power supply. ... _______________ 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 ... ISA _____________ PCI _____________ On Board ______________ Sound Card Manufacturer: __________ Model: _______________ ISA ____________ PCI ____________ On Board _____________ ...

Ngày tải lên: 21/12/2013, 19:15

... 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

... surviving CFU Trappin-2/activated conidia Trappin-2 A62D/M63L/activated conidia Trappin-2/nonactivated conidia Trappin-2 A62D/M63L /nonactivated conidia Elafin/activated conidia Fig. 4. Antifungal activity ... whereas dormant conidia were not killed (Fig. 4). The maxi- mum fungicidal effect was approximately 60% with the protein concentrations tested and was reached at a 15 lm concentration of trappin-2. Figure ... added in the incubation mixture (10 )7 M final) to evaluate their effect on fibronectin degradation by A. fumigatus protease(s). Fibronectin breakdown products were separated on a 10% SDS ⁄ PAGE...

Ngày tải lên: 18/02/2014, 17:20

... 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 ... 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 ... 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

... corresponding to the sequence of the 45th to 53rd residues. The resulting PCR products were then used as the second PCR templates with a gene-specific nested reverse primer, PHcp04rv, correspond- ing ... b 562 from Escherichia coli at 1.4 A ˚ resolution. J Mol Biol 247, 947–962. 4 Weber PC, Salemme FR, Mathews FS & Bethge PH (1981) On the evolutionary relationship of the 4-a-heli- cal heme proteins. ... Page MD, Sambongi Y & Ferguson SJ (1998) Contrast- ing routes of c-type cytochrome assembly in mitochon- dria, chloroplast and bacteria. Trends Biochem Sci 23, 103–108. 6 Sambongi Y, Uchiyama...

Ngày tải lên: 06/03/2014, 00:20

... capable of controlling reactive power to zero value at point of common connection (PCC).The mode of operation is referred as unity power factor. 2.7. Location of wind turbine The way of connecting ... 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...

Ngày tải lên: 17/03/2014, 02:20

... Harmonics Generation, Propagation and Purging Techniques in Non-Linear Loads 11 the measurement of harmonics should be made on Point of Common Coupling (PCC) or at the point where non-linear ... 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...

Ngày tải lên: 23/03/2014, 15:20

... customer- reviews on the Internet, one should concentrate computational efforts on messages in the final position of the text. 1 Introduction The ever-growing field of polarity-classification of written ... be located on a nearby position. From the user interaction point of view, the mouse movement to that location would have been either considerably shorter or longer (de- pending on its distance ... polarity-classification. Therefore, we first briefly review the well-established structure of text units while comparing notions of topic- extraction vs. our notion of polarity- classification. We then...

Ngày tải lên: 23/03/2014, 16:20

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Ngày tải lên: 18/04/2014, 12:25

Ngày tải lên: 18/04/2014, 12:28