[Hallb-engineering] DynaPower Box Supplies

[burkert]

That is still the current plan.
Volker


  On 1/13/11 6:47 AM, Doug Tilles wrote:
>    From what I understand the Mini T will be use for HDice in the second
> half Electron run? Please confirm.  DOUG
>
>
>
> On 1/12/2011 3:02 PM, Krister Bruhwel wrote:
>> Thanks Eugene.  The MiniT power supply has a ZFCT in it that we could
>> commender if needed (have to verify compatibility).  Will we use the
>> Mini-T supply along with the Moellers before the upgrade?
>>
>> Krister
>>
>> Eugene Pasyuk wrote:
>>> HDIce run will need Moeller.
>>>
>>> -Eugene
>>>
>>> On 1/12/11 2:40 PM, Krister Bruhwel wrote:
>>>> Does anyone know when we will need both Moellers again?  If we don't
>>>> have an experiment that uses them before 12 GeV (or something like
>>>> that), it would delay the time period before this thing could reach
>>>> critical mass ... If not, we will need to secure a spare for the short
>>>> term or accept the risk.
>>>>
>>>> Thanks,
>>>> Krister
>>>>
>>>> Krister Bruhwel wrote:
>>>>> Hello,
>>>>>
>>>>> Peter Abele just emailed me and that is his option number three ... I
>>>>> wonder what accuracy we really need for these supplies.  Here is his
>>>>> email:
>>>>>
>>>>> Mr. Bruhwel:
>>>>> I spoke with a couple of our engineers a short time ago and came up
>>>>> with
>>>>> a few ideas on how to proceed on this matter.  With the idea of some
>>>>> possible reduction n accuracy being considered it does open up some
>>>>> options on how to move ahead so with this in mind the following options
>>>>> were mentioned:
>>>>>
>>>>>
>>>>>
>>>>> 1.      A standard shunt with isolation amplifier: This would be the
>>>>> simplest arrangement which would use the most commonly available parts
>>>>> and be the least expensive and complicated to implement.  The finished
>>>>> result would offer a roughly ¼% accuracy.
>>>>>
>>>>>
>>>>>
>>>>> 2.      A hall effect CT assembly:  These are a bit more difficult to
>>>>> implement than a shunt but less costly that a high accuracy ZFCT type
>>>>> current monitoring device.  The finished result would offer a
>>>>> roughly ½%
>>>>> accuracy.
>>>>>
>>>>>
>>>>>
>>>>> 3.      A similar device to the ZFCT as built by another manufacturer:
>>>>> This option would take some work to get the electrical and mechanical
>>>>> details worked out and would be your most expensive option moving
>>>>> forward, but would offer similar performance to the ZFCT you currently
>>>>> installed on these power supplies.
>>>>>
>>>>>
>>>>>
>>>>> Please let me know if you think anything other than option 3 might be
>>>>> viable for you application and we can investigate accordingly.  Also,
>>>>> please provide information about the exact power supplies in
>>>>> question so
>>>>> we can understand the ratings of what was built originally and what
>>>>> would be involved in a retro-fit installation of these devices.
>>>>> Thanks.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Peter Abele
>>>>>
>>>>> Senior Sales Engineer
>>>>>
>>>>>
>>>>> John Segal wrote:
>>>>>
>>>>>> Danfysik spun off the transducer portion of their business.  You still
>>>>>> go through GMW for it, though.
>>>>>>
>>>>>> Bill Merz wrote:
>>>>>>
>>>>>>> If the problem is that you need a replacement transductor head or
>>>>>>> electronics you should be able to purchase something from Danfysik as
>>>>>>> a drop in as long as the "Current signal" is compatible with the
>>>>>>> Dynapower regulator. You would need to buy a complete
>>>>>>> system...transductor head and electronics, but it should just work
>>>>>>> fine. Hitek also makes a precision transductor which may also work if
>>>>>>> you need 10PPM type of performance.
>>>>>>>
>>>>>>> Bill
>>>>>>>
>>>>>>>
>>>>>>> On 1/12/2011 2:00 PM, Krister Bruhwel wrote:
>>>>>>>
>>>>>>>> Hello,
>>>>>>>>
>>>>>>>> I had a ZFCT chassis fail in November of 2010 on one of our Moeller
>>>>>>>> Power Supplies (8000A 40V).  As our spare needed a mounting bracket
>>>>>>>> that wasn't included, I robbed the chassis from an unused supply
>>>>>>>> (the downstream Moeller because we are running TPE) .  Upon asking
>>>>>>>> DynaPower for repair/replacement, I was met with some ambiguity and
>>>>>>>> they would look into the problem.  Today I talked with Peter Abele,
>>>>>>>> the Senior Sales Engineer, and his message was that they are still
>>>>>>>> in the power supply business but they can no longer repair or
>>>>>>>> manufacture the ZFCT chassis' or heads.  He will work with us on a
>>>>>>>> long term solution of trying to retrofit something (undefined as of
>>>>>>>> yet) or using shunts if the accuracy is sufficient.
>>>>>>>> This message may impact anyone that needs to support a box supply
>>>>>>>> from DynaPower.  At present Hall B does not have a spare ZFCT
>>>>>>>> chassis.  After I get a bracket made, I will need to test the unused
>>>>>>>> spare, to ensure we can use both Moellers for upcoming experiments.
>>>>>>>> If anyone has a ZFCT chassis that I can use as a spare, please let
>>>>>>>> me know.   If anyone knows of options that we can utilize in the
>>>>>>>> short or long term, please let me know.   Its important for Hall B
>>>>>>>> to understand that this may affect experiments in the future as we
>>>>>>>> have no spares at present.
>>>>>>>>
>>>>>>>> These supplies are to be used through the 12GeV upgrade and a long
>>>>>>>> range solution is needed.
>>>>>>>> I will advise as more details become relevant, and please forward
>>>>>>>> this message to concerned parties.
>>>>>>>>
>>>>>>>> Regards,
>>>>>>>> Krister Bruhwel
>>>>>>>>
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