how a switching power supply works

... 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 in ... 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 ... 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 ... viewed as a blackbox with input and output terminals, the behavior of a switching regulator is identical to that of a linear regulator The fundamental difference is that a linear regulator regulates...

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

... save You can also get Shadow Copy software that will restore accidentally deleted files You can have an automatic robot installed that will remember all those passwords you have and automatically ... a room separate from the family room Apart from a computer, scanner and printer, your work office may need a filing cabinet with a lockable drawer, along with a phone line or two and a fax machine ... to visualize what you will use each area for You haves your workspace which is usually occupied by a computer and chair and you have storage space that is close to the workspace You can use...

Ngày tải lên: 22/10/2013, 19:15

... circuits are split into upstairs and downstairs If a cartridge fuse is used it should be rated at 5amps, if an MCB is used it should be rated at 6amps Please also check the rules very carefully ... electricians when you sell your home This can affect your sale, you could be breaking the law and your house insurance may not be valid Please be absolutely sure you know what you are doing and get all ... energy than the circuit is designed for More energy = more heat and cables can catch fire Part P of the new building regulations could involve a check on any additional circuitry by qualified...

Ngày tải lên: 14/04/2014, 11:33

... 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 ... Department of Elecrical Engineering, Chungnam National University, Daejeon, Korea His research interests are high power converter, ac/dc, dc/ac and ac/ac converter topologies, power quality and ... Somnida Ratanapanachote received the B.Eng degree from Mahidol University, Nakhon Pathom, Thailand, in 1995, and the M.Eng and Ph.D degrees from Texas A& M University, College Station, in 1998 and...

Ngày tải lên: 13/05/2014, 00:55

... +5.0V 2.0 A 0.9 A 0.9 A 0.5 A 3.94 A 3.94 A 3.25 A 0.5 A 0.5 A 1.2 A 1.5 A +12.0V 7.4 A 0.3 A 0.7 A 0.7 A 3.02 A 3.02 A 0.6 A 1.6 A 1.5 A Tổng số ampe đường Tổng số watt Công suất tổng 5.7 A 18.81 ... đánh l a người dùng, tìm hiểu vấn đề qua hai ví dụ nhỏ sau: - Bộ nguồn thứ có số: Output: +3.3v rail = 3 0a +5v rail = 4 0a +12v rail = 3 4a Continuous power = 510W max Peak power ... quy bị chai có trục trặc khó thay - Khe điện ph a sau: Việc đ a cổng molex ph a sau nguồn đem lại nhiều lợi ích bạn tưởng Những loại đèn trang trí, ổ đ a cứng gắn thông qua giao tiếp e-SATA thường...

Ngày tải lên: 01/11/2012, 16:38

... Sanchez-Sinencio Laszlo Kish Charles S Lessard Costas Georghiades May 2006 Major Subject: Electrical Engineering iii ABSTRACT A Low Power, High Dynamic Range, Broadband Variable Gain Amplifier for an Ultra Wideband ... gain because the control voltage is an analog signal Next the analysis on the linear range and the power consumption of multiplier will be given to show its advantages and drawbacks (1) Linear ... group delay variation A differential pair can be linearized with diode-connected loads But in large gain cases, the linear range and bandwidth are limited A multiplier has good linearity and flexible...

Ngày tải lên: 06/11/2012, 10:26

... đầu cắm ví dụ card đồ h a ,đầu chuyển đổi ATA– SATA đ a cứng chí bo mạnh chủ DFI Lanparty NF4 chẳng hạn 2.1.4 Chuẩn nguồn - Chuẩn thống trị máy tính để bàn nói chung ATX (Advanced Technology ... Nguồn ATX : sử dụng cho vỏ máy ATX Mainboard ATX Có vài kiểu ATX giới thiệu phần Có 03 khác nguồn AT ATX : có sử dụng nguồn phụ 3.3V , thứ hai nguồn ATX sử dụng 20 chân cắm , thứ có dây Power- on ... power switch, thường đóng dấu PW PW_ON hay POWER SW, từ ph a trước thùng máy đến mainboard Tuy nhiên, trường hợp xảy bạn v a thay mainboard v a chỉnh s a Bộ môn bảo trì máy tính 30 Nhóm 4:Tìm...

Ngày tải lên: 27/04/2013, 11:36

... its applications to phase change phenomena Thermal Science and Engineering 2002, 10(6), 31-38 [12] Takata Y, Tanaka K, Kaijima K, et al Enhancement of heat transfer with liquid-vapor phase change ... Bejan A, Tsatusaronis G, Moran M Thermal design and optimization, Wiley, 1996 [10] Cengel YA Heat transfer- a practical approach, McGraw-Hill, 1998 [11] Takata Y Photo-induced hydrophilicity and ... on heat and mass transfer related with renewable energies, HV&AC, and energy saving of buildings He has published several research papers in the international journals E-mail address: qicy@mail.hebut.edu.cn...

Ngày tải lên: 05/09/2013, 16:10

... absorbed to the capacitor By choosing suitable capacitor from (1), high voltage can be generated to the capacitor The high voltage is applied on the load when S1 and S3 are turned on again, and ... In steady state, is determined by the resistance and the voltage source as Exploiting the advantage of Marx circuit that capacitors charges in parallel and discharges in series, this magnetic ... switch was made The circuit parameters are given in Table II Fig shows experimental waveforms of current and voltage of the load The repetition rate is kHz Since the capacitors are charged with a DC...

Ngày tải lên: 15/10/2013, 16:11

... Voltage Regulator The LM723 has an equivalent circuit that contains most of the parts of the op-amp voltage regulator discussed earlier It has an internal voltage reference, error amplifier, amplifier ... made into a variable regulator by replacing R2 with a pot However, However there are several disadvantages: Minimum output voltage is Vreg instead of V IQ is relatively large and varies from chip ... are a e dc m st ithstand V plus voltage spikes 49 H Chan; Mohawk College Basic Half-Bridge Power Converter Half- Each transistor “sees” approx Vin Full flux reversal in the transformer and capacitors...

Ngày tải lên: 13/12/2013, 23:15

... usually between 250 and 300 watts What is the power supply rating for the case? _ Step Attach the motherboard standoffs to the case Standoffs are small pegs made of a nonconductive material ... _ How many parallel ports are there? _ Is there an AGP slot? How many USB ports are there? How many other ports or slots are there? _ What kind(s) are they? _ CPU Manufacturer: ... there? _ How many ISA slots are there? How many PCI slots are there? How many EIDE connectors are there? _ How many floppy connectors are there? _ How many serial ports are there?...

Ngày tải lên: 21/12/2013, 19:15

... the battery bank is 360 V Both the simulation and the experimentation have been carried out The results are shown hereafter A Simulation Results Fig 8 (a) and (b) shows the output voltages and ... Aug 2007 [19] G Escobar, A A Valdez, J Leyva-Ramos, and P Mattavelli, “Repetitivebased controller for a UPS inverter to compensate unbalance and harmonic distortion,” IEEE Trans Ind Electron., ... for traction drive of fuel cell–battery hybrid vehicles,” in Proc 40th Annu Meeting Ind Appl., Oct 2–6, 2005, vol 3, pp 1651–1656 [14] A Kawamura, R Chuarayapratip, and T Haneysoshi, “Deadbeat control...

Ngày tải lên: 03/01/2014, 19:12

... forwards traffic to internal hosts in a similar manner to how port-range forwarding works, with one important difference Port triggering does not forward any traffic to an internal host until that ... internal host has initiated some form of traffic for an external destination When that occurs, the port triggering mechanism automatically allows traffic to be forwarded to the host that initiated ... primarily to support applications that attempt to communicate with hosts using different ports than what they were contacted on A common example of this is many gaming applications For example,...

Ngày tải lên: 26/01/2014, 04:20

... • • Static translation An external address is assigned on a 1:1 basis to an internal address This is commonly referred to as traditional NAT Dynamic translation An external address (or address ... security algorithm (ASA) The ASA uses a stateful approach to security Every inbound packet is checked exhaustively against the ASA and against connection state information in memory The ASA applies ... networks are not using NAT at all, as is typically the case with VPN connections, translations are not required Instead, the command nat acl is used to specify the traffic (based on the ACL) that...

Ngày tải lên: 26/01/2014, 04:20

... conductor break is mandatory in TN-S diagrams (France and Norway) The distribution of a neutral conductor in an IT diagram is not permitted (USA and Norway) The maximum rated voltage of an AC control ... Standards and conventions As we have already said, an electrical power supply is governed by constraints in two areas: b Electrical distribution system Each country has its own conventions and ... Electrical power supply Summary 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 to the control circuit Page...

Ngày tải lên: 15/02/2014, 08:33