[SI-LIST] Re: DC Power supplies Connected in parallel
- From: steve weir <weirsi@xxxxxxxxxx>
- To: erfan@xxxxxxxxxxxxxxx
- Date: Sat, 11 Aug 2012 06:28:33 -0700
Ohm's Law tells us: I = (V1 - V2)/(R1 + R2)
An ideal voltage source has R = 0.
A current limited supply exhibits a variable R = (Vinternal -
Vexternal)/Ilimit
Steve
On 8/11/2012 6:12 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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>
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