[SI-LIST] Re: DC Power supplies Connected in parallel
- From: "Erfan" <erfan@xxxxxxxxxxxxxxx>
- To: "'Istvan Novak'" <istvan.novak@xxxxxxxxxxx>
- Date: Sat, 11 Aug 2012 17:30:26 +0300
Hai Istvan Novak,
I am talking about 2 different power supplies one set to 12V and other set
to 5V. What happens when this 2 supplies are connected in parallel?
Regards,
Erfan
-----Original Message-----
From: Istvan Novak [mailto:istvan.novak@xxxxxxxxxxx]
Sent: Saturday, August 11, 2012 5:27 PM
To: erfan@xxxxxxxxxxxxxxx
Cc: si-list@xxxxxxxxxxxxx
Subject: Re: [SI-LIST] Re: DC Power supplies Connected in parallel
Erfan,
Are you talking about connecting 12V and 5V outputs together or are you
talking about connecting in parallel nominally the same output voltages
generated from different (5V and 12V) input voltages? Both questions
may be legitimate, but the answers and tradeoffs could be very different.
Regards,
Istvan Novak
Oracle
On 8/11/2012 9:12 AM, Erfan wrote:
> Hai Steve,
>
> Is it a good idea to put a different power supplies in parallel (like I
said
> 12V and 5V). If they are not current limited what happens? Is this
> configuration usable? Also what happens if they are current limited?
>
> Can you give some detailed explaination.
>
> Regards,
> ERFAN
>
> -----Original Message-----
> From: steve weir [mailto:weirsi@xxxxxxxxxx]
> Sent: Saturday, August 11, 2012 12:37 PM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: DC Power supplies Connected in parallel
>
> On 8/11/2012 2:13 AM, Erfan wrote:
>> Hai Everyone,
>>
>>
>> I have few questions regarding the DC power supplies.
>>
>>
>>
>> What happens when 2 DC-power supplies are connected in parallel which has
> 2
>> different voltages let say one has 12V and other has 5V.
> It depends on the power supply designs. If they are not current
> limited, you replace the fuses and perform other necessary repairs.
>
>> What happens to
>> their voltage and current, current has to get added up to my knowledge
> does
>> it really happen in this case?
> Ohm's Law prevails.
>> What happens to voltage do I see 12V or 5V?
>> what happens in case of grounds are isolated and not isolated?
>> If I have to
>> generate more current using 2 DC supplies in parallel then what care or
>> configuration I should use. Wanted to know the practical limitations of
>> using them.
>>
> Use supplies designed to share current.
>>
>>
>> Kindly through some light in this regard.
>>
>>
>>
>> Regards,
>>
>> Erfan
>>
>>
>>
>>
>>
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