solar powered power supply for laptops
Power Supply Units Guide.
Ngày tải lên :
01/11/2012, 16:38
... 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 thuộc dạng mạnh được ...
ra thử nghiệm bao gồm:
+ AMD Opteron DualCore 165 @
2.9Ghz.
+ DFI LanpartyUT nForce4 SLI-D.
+ nVIDIA GeForce 6800Ultra
+ 4x512 Corsair XMS PC3200C2.
+ 3x Maxtor Diamond Plus 9 120GB
7200rpm ... liên tục:
Mức năng lượng liên tục (Continuous Power) là chỉ số nêu lên khả năng cấp điện của nguồn mọi
lúc trong khi năng lượng cực đại (Peak Power) lại chỉ mức tối đa trong khoảng thời gian...
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UPS (Uninterruptible Power Supply)
Ngày tải lên :
27/04/2013, 11:36
... Nếu
máy khởi động ở lần thử thứ hai và thứ ba thì ắt hẳn là do tín hiệu
Power_ OK (hoặc Power_ Good). Khi có tín hiệu Power_ OK, mainboard sẽ
hiểu rằng PSU đã ổn định, nếu không thì mainboard ... khởi động bằng cách chập hai chân của nút power switch trên
mainboard bằng một chiếc tua-vít, chìa khóa hay bất cứ thứ gì có thể dẫn
điện. Nếu công tắc power switch của bạn bị hỏng và bạn không ... Học
1. Đôi nét về bộ nguồn máy tính.
1.1.Bộ nguồn máy tính là gì ?
- Bộ nguồn máy tính (PSU -Power Supply Unit) là một thiết bị phần cứng ,
nó chuyển đổi năng lượng (từ dòng xoay chiều dân dụng...
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Electronics - Digital Control of Switching Power Supply
Ngày tải lên :
27/10/2013, 16:15
...
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 Future ... parameters.
Digital Control of Switching Power Supply
- Power Factor Correction Stage
Sangsun Kim and Dr. P. Enjeti
Power Electronics and Power Quality Laboratory
Department of Electrical ... employed for power supply applications as shown in. Fig. 2. In order to
obtain high speed bandwidth of the fixed point DSP, TMS320LF2407, numerous off-line
computations are first performed and...
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Tài liệu Power Supply Block Diagram ppt
Ngày tải lên :
13/12/2013, 23:15
... often referred to as
H. Chan; Mohawk College
37
pgg
dc to dc converters.
Formulae (cont’d)Formulae (cont’d)
FfidRbt iblVFor fixed R
L
, but variable V
i
:
Z
sL
i
V
R
RR
V
+
=.min
ZsRi
Z
L
i
VRIV
R
+=
(max)
.max
LZMR
IIIwhere ... causing current
to 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 ... Basic HalfBasic Half Bridge Power ConverterBridge Power Converter
Each transistor “sees” approx. V
in
. Full flux reversal in the
H. Chan; Mohawk College
50
transformer and capacitors across...
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Tài liệu The Computer Case and Power Supply pptx
Ngày tải lên :
21/12/2013, 19:15
... 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. ... on the Motherboard).
Power Supply
AT
__________
ATX
_________
Other
_________
Power Supply Wattage
_______
Step 2
Examine the screws that will be used for the case.
Are the ... the case for the installation of the motherboard.
Equipment
The following equipment is required for this exercise:
ã ESD wrist strap
ã Tool kit and screws
ã Computer case with power supply...
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Single phase uninterruptible power supply based on z source inverter
Ngày tải lên :
03/01/2014, 19:12
... declines by 20%
of its normal voltage. The waveform distortion can be observed
for the traditional UPS, whereas the sinusoidal waveform can be
kept for the proposed UPS. Fig. 9(c) further shows ... patterns for uninterruptible
power supply, ” IEEE Trans. Ind. Electron., vol. 35, no. 2, pp. 295–300,
May 1988.
[15] M. J. Ryan, W. E. Brumsickle, and R. D. Lorenz, “Control topology
options for single-phase ... Uninterruptible Power Supply
Based on Z-Source Inverter
Zhi Jian Zhou, Xing Zhang, Po Xu, and Weixiang X. Shen, Member, IEEE
Abstract—This paper presents a new topology of uninterrupt-
ible power supply...
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asg 2 electrical power supply
Ngày tải lên :
15/02/2014, 08:33
... fuses for fuse-holders or fused switches.
A Fig. 2 Power supply functions
A Fig. 1 Electrical power supply architecture
2.4 Power supply functions
2. Electrical power
supply
6
2.4 Power supply ... distribution system.
2.4 Power supply functions
2.5 Power supply to the control circuit
2. Electrical power
supply
7
b Power unit supply
The table (C Fig. 5) summarises the power units and functions ... 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...
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Your PC, Inside and Out: Chassis, Power supply and Motherboard
Ngày tải lên :
19/03/2014, 20:35
... of room for
Power Rating
The power rating of a power supply is most
often referred to as its wattage. You can
usually tell the power rating of a PSU just by
looking at its model number; for example, ... 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 will thank
you for ... can see, a power supply is most
efficient at around 50% load; that is to say,
this power supply is at its most efficient when
providing 275W of power to components. The
vast majority of power supplies...
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' LENMAR ' power adapter, for nokia electronic
Ngày tải lên :
19/03/2014, 22:08
...
do not match. Therefore, there is a need for message
do not match. Therefore, there is a need for message
transformation between the originator and the recipient.
transformation between the ... source adapter transforms the source message to a common
A source adapter transforms the source message to a common
form while a target adapter changes the common form to that
form while a target ... risks for mission critical applications
There are too many risks for mission critical applications
To provide a means of exchange for business information
To provide a means of exchange for...
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The Knowledge Web: People Power – Fuel for the New Economy pot
Ngày tải lên :
29/03/2014, 20:20
... we believe that the Internet does
not allow for “me, too” companies to be relevant for very long. We also look for
companies that leverage the full power of the Internet, which are often “born ... important for the U.S worker, is the
fact that globalization has enabled economic specialization like never before.
For the workers of developed nations, this has further heightened the need for
continuous ... Dollars Expected to Shift Toward Performance-Based Metrics
1999E
CPM-Bas ed
85%
Performance-
Based
15%
2003E
CPM-Bas ed
50%
Performance-
Based
50%
Source: Forrester Research, "Internet Advertising...
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Let s go green! build a solar powered parabolic
Ngày tải lên :
18/04/2014, 09:08
... http://www.instructables.com/id/Let_s-go-green!-Build-a -Solar- Powered- Parabolic-Co/
Home Sign Up! Explore Community Submit
Let's go green! Build a Solar Powered Parabolic Cooker!
by Weissensteinburg ... . 7
http://www.instructables.com/id/Let_s-go-green!-Build-a -Solar- Powered- Parabolic-Co/
intro: Let's go green! Build a Solar Powered Parabolic Cooker!
Let's face it, energy is expensive. ... parabola. I've used the string method for it, but found it much
easier with grid paper.
http://www.instructables.com/id/Let_s-go-green!-Build-a -Solar- Powered- Parabolic-Co/
gaiatechnician says:
...
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brown, m. (1990). practical switching power supply design
Ngày tải lên :
18/04/2014, 12:25
... major power supply parame-
ters as
a
preliminary guide
at
the beginning
of
a switching power supply
4.3
Transformer-Isolated Switching Power
Supply
Topologies
29
As
in all power supply ... Switching Power Supply
former is improperly designed,
it
would adversely affect the supply op-
eration and the reliability of the semiconductors.
3.4
Power Switches
These are power transistors ... regulator within a system that has a main
power supply.
4.3
Transformer-Isolated
Switching
Power
Supply
Topologies
As
one may have seen
in
the
non-transformer-isolated
regulator
topolo-...
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brown, m. (2001). power supply cookbook (2nd ed.)
Ngày tải lên :
18/04/2014, 12:28
... wattmeter for conveniently measuring efficiency and power
factor. This is needed for off-line power supplies.
10 Role of the Power Supply within the System and Design Program
Power Supply Cookbook
Second ... environment in which the power supply must operate. This then forms
the basis of the design specification of the power supply.
1.2 Power System Organization
The organization of the power system within ... of the power components within the switching power supply
design. This arrangement has a large bearing on which environment the supply
can operate in safely and how much power the power supply...
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