pc wont turn on power supply good
Single phase uninterruptible power supply based on z source inverter
Ngày tải lên :
03/01/2014, 19:12
... 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 ... 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 ... Electron., vol. 52, no. 1, pp. 206–212,
Feb. 2005.
[17] A. Von Jouanne, P. N. Enjeti, and D. J. Lucas, “DSP control of high
power UPS systems feeding nonlinear loads,” IEEE Trans. Ind. Electron.,
vol....
- 8
- 428
- 1
Your PC, Inside and Out: Chassis, Power supply and Motherboard
Ngày tải lên :
19/03/2014, 20:35
... 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 ... 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...
- 94
- 462
- 0
Power Supply Units Guide.
Ngày tải lên :
01/11/2012, 16:38
... 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...
- 13
- 784
- 3
UPS (Uninterruptible Power Supply)
Ngày tải lên :
27/04/2013, 11:36
... 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 ... lập trong Windows.
Bước 9
Nếu có điện mà màn hình không hiển thị, thử tắt máy và khởi động lại. Nếu
máy khởi động ở lần thử thứ hai và thứ ba thì ắt hẳn là do tín hiệu
Power_ OK (hoặc Power_ Good) ....
- 52
- 1.1K
- 5
DE ON DAI HOC (GOOD) 09
Ngày tải lên :
18/08/2013, 10:10
...
Câu 71: Our opinions on the subject are identical
A. There’s some difference in our opinions on the subject
B. We differ in opinions on the subject
C. WE have the same opinions on the subject
D. ... matter
Câu 45: Napoleon III eventually landed in England…
a. but a dethroned exile b. but being only a dethroned exile
c. not only as a dethroned exile d. but only as a dethroned exile
Đọc kỹ đoạn ... differ……….our opinions on the matter
a. in b. from c. about d. on
Câu 9: Up………….and the people cheered
a. went the balloon b. did the balloon go c. does the balloon go d. goes the balloon.
Câu 10....
- 5
- 2.5K
- 15
Electronics - Digital Control of Switching Power Supply
Ngày tải lên :
27/10/2013, 16:15
... 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...
- 11
- 535
- 1
Tài liệu Power Supply Block Diagram ppt
Ngày tải lên :
13/12/2013, 23:15
... 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 ... 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...
- 53
- 403
- 1
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. ...
_______________
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
_____________
...
- 4
- 373
- 0
asg 2 electrical power supply
Ngày tải lên :
15/02/2014, 08:33
... 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...
- 8
- 397
- 0
Báo cáo "Application of power electronic components to control parameters and switching of compensation devices on power networks " doc
Ngày tải lên :
05/03/2014, 14:20
... 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...
- 6
- 408
- 0
AN UPDATE ON POWER QUALITY pptx
Ngày tải lên :
17/03/2014, 02:20
... 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 ... 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...
- 158
- 369
- 0
AN UPDATE ON POWER QUALITY doc
Ngày tải lên :
23/03/2014, 15:20
...
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...
- 157
- 406
- 0
advice on giving a good powerpoint presentation
Ngày tải lên :
26/03/2014, 14:07
... previous one by focusing on how to give a good Power-
Point presentation. The ability to do a PowerPoint presenta-
tion well is a valuable skill that many students will find useful
in connection with ... definitions rather than technically correct
ones. Avoid technical details. A “calibration” example often
helps (i.e., test a new definition on familiar objects).
7. Mention applications.
8. ... that do not contribute
Advice on Giving a Good
PowerPoint Presentation
Joseph A. Gallian
University of Minnesota Duluth
“The ability to do a PowerPoint presentation well is a valuable
skill that...
- 3
- 413
- 1
Recommendation on Principles and Good Practices for Financial Education and Awareness potx
Ngày tải lên :
29/03/2014, 18:20
... institutions and consumer protection (including the
regulation of financial information and advice). The promotion of financial education should
not be substituted for financial regulation, which ... policy tools to consider are consumer protection and financial institution
regulation. Without limiting the freedom to contract, default mechanisms, which take into
consideration inadequate financial ... FINANCIAL
EDUCATION AND AWARENESS
THE COUNCIL,
Having regard to Article 5 b) of the Convention on the Organisation for Economic Co-operation and
Development of 14th December 1960;
Considering that,...
- 7
- 344
- 0
