All Questions
Tagged with load power-supply
57
questions
-1
votes
1
answer
49
views
Can you help me understand W=I*V - house load
So I'm trying to work out my daily Ah usage for an off-grid set up (and to see what my power bill at this new place might be like).
Context:
I've gone through and created a sheet with the appliances I ...
- 99
1
vote
1
answer
95
views
If the three-phase voltages are square waves, is there a neutral voltage in a balanced wye-wye configuration?
I am analyzing a wye-wye configuration circuit. Both the source and the load are balanced. The source is three-phase. Each phase is offset by 120 degrees. Neither the source nor the load is grounded.
...
- 57
0
votes
1
answer
66
views
Power supply oscillations when driving LEDs with microcontroller
I driving some LEDs at about 114 Hz with a power supply of 9 V and a max current supply of 150 mA, LEDs are running about 60 mA I have some LEDs in parallel. If I increase to 200 Hz it's the same, How ...
- 185
0
votes
2
answers
154
views
Voltage fluctuations in TIP122
I have used the following circuit diagram for power supply using a transformer,simple bridge rectifier and filter capacitor at the back of it to get 12V dcI have used the TIP122 as shown:
Idealy the ...
user340506
1
vote
1
answer
179
views
Does car alternator speed increase during load dump?
I am trying to understand the mechanism of voltage surges during load dump in automobiles.
As per this article -
The load-dump event has two components. First is the pulse amplitude (VP), which ...
- 3,032
3
votes
1
answer
365
views
Is "load sharing" when 2 power supplies are connected in parallel or when a battery is connected indirectly to the load?
I see the term "load sharing" used in two completely different cases:
When 2 power supplies are connected in parallel, a technology that ensures that each delivers half of the load current: ...
- 22.8k
0
votes
1
answer
93
views
Voltage drop reason not understood
I am using a 12V 5A adaptor to power a 12V pump and a 12V solenoid valve. The solenoid valve is supposed to pull 600mA, the pump is supposed to pull 0.6-1A. Hence to play safe the 12V 5A adaptor. ...
- 532
-4
votes
4
answers
205
views
Power supply for remote load
I tried to design power supply circuit myself because no power supply would do for me (or I'm just unaware). My issue is that I have power supply far away from load and there is no way I can shorten ...
- 19
-1
votes
1
answer
143
views
Buck converter load voltage drop
I'm creating a buck converter from a NE555 and LM358 (feedback loop) for powering a tablet motherboard. (This is a learning experience for me, don't want to use an off-the-shelf board.)
Here is the ...
- 103
5
votes
2
answers
1k
views
Why do power supplies get less efficient at high load?
Many PSUs follow the 80 PLUS standards, and it shows efficiency peaks at intermediate loads.
Power supplies are less efficient at low loads due to quiescent current. But why are they also less ...
- 749
3
votes
3
answers
152
views
Delayed switch (closed for three seconds then open)
I have server that won't power up.
I found that if I connect a 50Ω load to the +12 VDC output of the power supply everything works fine.
I only need this additional loading for about three seconds.
I ...
- 31
1
vote
2
answers
279
views
SMPS Pre Regulator Minimum load
I am designing a 30 V 5 A lab bench power supply having SMPS as a pre-regulator for the linear stage which will keep the SMPS output always 4 V higher than the main output voltage. This means SMPS ...
- 180
0
votes
0
answers
304
views
How to calculate portable power station draining with other loads?
I want to buy a portable power station, it's basically a battery, the battery capacity at 14.8V/15Ah is 222Wh, I want to know how many times it will long for some loads, such as a simple light , or ...
- 1
-1
votes
1
answer
255
views
Power a circuit with with 12V barrel jack and USB 5V
What if I use a Schottky diode at both the power rails in forward voltage mode and connect both the supplies? Will it damage my circuitry?
Reverse current will not damage my device because of the ...
- 107
0
votes
0
answers
75
views
Adjustable MOSFET dummy load to drain PSU negative side (-12V)
I have a mission to build a dummy load to make a PSU test and found some schematics with a positive load. It worked like a charm.
Electronic load, Problem turning MOSFET on
But there is no information ...
