shpark82
asked on
What components affect Power Supply rating
My friends and I have decided to build and test a computer power supply
Here is the question.
What component in the power supply affect the wattage rating? (ie. the max current) and how do u make it give more watts?
what component affect the ripple and to make less ripple?
what component affect the tolerance level, say make +12 v give within 5-10% of 12v and how to make it less than 3%
what component affect the stability and life of the power supply?
how do we calculate the maximum power (wattage or even current) a power supply can deliver?
and maybe info on how to pick between components such as op amps and what to look for
Here is the question.
What component in the power supply affect the wattage rating? (ie. the max current) and how do u make it give more watts?
what component affect the ripple and to make less ripple?
what component affect the tolerance level, say make +12 v give within 5-10% of 12v and how to make it less than 3%
what component affect the stability and life of the power supply?
how do we calculate the maximum power (wattage or even current) a power supply can deliver?
and maybe info on how to pick between components such as op amps and what to look for
dhsindy
When the output is changed nearly every component has to be changed. You are going to have rectifiers, voltage dividers, regulators, etc. What you need to do is decide what the input is and what the outputs are to be. Design the circuits to perform the functions; then, review each component and figure out what the ratings are for the components. Every component must be able to tolerate its load without failure. Even the wires connecting components have to be considered.
Hi there...
Well, doing it right is definately not a trivial thing... even if you have a schematicv and parts... understanding how it all works is quite complicated.
Depends if it is a switching power supply or not. (the switching power supplies are more efficient.) Of course you'll have a transformer, rectifiers, capacitors to reduce ripple... but the technology that regulates power on a moden power supply can vary.
Tolerance is a combination of what the chips can provide and how much of a load can they provide it under... usually specified by the chip manufacturers... and form of power regulator chip... altho... also any reference sources that are used. Lots of power supplies include some over-voltage and current protection schemes so, tehre's a lot to look in to for a good power supply.
Info on switching power supplies
http://www.smps.us/
http://members.tripod.com/michaelgellis/power4.html
Jeff
at yourtechonline.com
Well, doing it right is definately not a trivial thing... even if you have a schematicv and parts... understanding how it all works is quite complicated.
Depends if it is a switching power supply or not. (the switching power supplies are more efficient.) Of course you'll have a transformer, rectifiers, capacitors to reduce ripple... but the technology that regulates power on a moden power supply can vary.
Tolerance is a combination of what the chips can provide and how much of a load can they provide it under... usually specified by the chip manufacturers... and form of power regulator chip... altho... also any reference sources that are used. Lots of power supplies include some over-voltage and current protection schemes so, tehre's a lot to look in to for a good power supply.
Info on switching power supplies
http://www.smps.us/
http://members.tripod.com/michaelgellis/power4.html
Jeff
at yourtechonline.com
Trying tyo answer your questions : one by one (i have a feeling this is a 200 point question)
>> What component in the power supply affect the wattage rating? (ie. the max current) and how do u make it give more watts? << in general, the output circuit, but of course the transformation section from AC to DC must be able to pass it through
>> what component affect the ripple and to make less ripple? << in general, output filter capacitors, but the transformation frequency plays here too.
>> what component affect the tolerance level, say make +12 v give within 5-10% of 12v and how to make it less than 3% << in general the tolerance of the parts used, and the self correcting abilities of the circuit (feedback)
>> what component affect the stability and life of the power supply << difficult to comment on, but allowing for a margin in the components used , and their quality are factors
>> how do we calculate the maximum power (wattage or even current) a power supply can deliver << depends on the output circuit, the stabilisation circuits, and even the cooling
>> What component in the power supply affect the wattage rating? (ie. the max current) and how do u make it give more watts? << in general, the output circuit, but of course the transformation section from AC to DC must be able to pass it through
>> what component affect the ripple and to make less ripple? << in general, output filter capacitors, but the transformation frequency plays here too.
>> what component affect the tolerance level, say make +12 v give within 5-10% of 12v and how to make it less than 3% << in general the tolerance of the parts used, and the self correcting abilities of the circuit (feedback)
>> what component affect the stability and life of the power supply << difficult to comment on, but allowing for a margin in the components used , and their quality are factors
>> how do we calculate the maximum power (wattage or even current) a power supply can deliver << depends on the output circuit, the stabilisation circuits, and even the cooling
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