Difference between revisions of "Controls Meeting 19-Apr-2012"

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=Minutes=
 
=Minutes=
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Present:  Elliott W, Giles B, Mark S, Scot S, Sarin P, Tim W, Bill C, Cody D, Josh B, Vanik K.
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'''Danfysik Power Supplies'''
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Sarin's introduction to Danfysik power supplies took up most of the meeting.  See his slides for many details.  He described the basic design of Danfysik supplies, what they do best and where they are used at JLab.  In general they are best for high-current but relatively low-voltage applications.  Current stability is 10 ppm of full-scale (3000A in the case of our solenoid supply).  Routine maintenance is required to keep them working well, e.g. tightening clamps and bolts, acid-flushing cooling water piping, etc.  ZFCT stability is good, no need to tune it in our case, but may be needed if the load changes dramatically and if you are worried about low-level harmonic distortions.
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Sarin will help us develop a test procedure to ensure the slow dump system is working.  Recall that we never (maybe) achieved a slow dump because when we changed the dump resistor we didn't realize some internal circuits had to be adjusted (we talked to Danfysik about this and they never mentioned this!). 
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Sarin will meet with a subset of the Controls group to go over details of operation of our particular supply late in May.  We plan to go over certain circuits in detail, especially the fast and slow dump circuits. 
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'''???'''

Revision as of 14:09, 19 April 2012

Agenda

  • Announcements
    • summer students and new Mantis tasks
    • Vanik will present results concerning controlling stepper motors in two weeks
  • Minutes from previous meeting 5-Apr-2012
  • Danfysik tutorial - Sarin Philip
  • EPICS - Hovanes, Vanik
    • alarm system, stepper motors, goniometer, UConn boards, other power supplies, etc.
  • Counting house installation - Hovanes, Mark
  • Solenoid_Controls_Redesign - Mark, Josh, Scot, Yi, Elliott
    • FMEA, UPS power to Danfysik, coil taps and PXI, SOE, QD, shunt replacement, ground fault detector, etc.
  • JInventory database - Elliott
    • EMI specs
    • cables
    • barcode scanner
    • hierarchical data
  • Test stand - Hovanes, Josh
  • PLC programming - Josh
  • Elogs and databases - Elliott
  • Experiment Control Supervisor - Elliott
  • Mantis task tracker



Time/Location

9:30 AM Thurs 19-Apr-2012 CC L207


Announcements

Next Meeting

9:30am 3-May-2012 CC L207


Minutes

Present: Elliott W, Giles B, Mark S, Scot S, Sarin P, Tim W, Bill C, Cody D, Josh B, Vanik K.


Danfysik Power Supplies

Sarin's introduction to Danfysik power supplies took up most of the meeting. See his slides for many details. He described the basic design of Danfysik supplies, what they do best and where they are used at JLab. In general they are best for high-current but relatively low-voltage applications. Current stability is 10 ppm of full-scale (3000A in the case of our solenoid supply). Routine maintenance is required to keep them working well, e.g. tightening clamps and bolts, acid-flushing cooling water piping, etc. ZFCT stability is good, no need to tune it in our case, but may be needed if the load changes dramatically and if you are worried about low-level harmonic distortions.

Sarin will help us develop a test procedure to ensure the slow dump system is working. Recall that we never (maybe) achieved a slow dump because when we changed the dump resistor we didn't realize some internal circuits had to be adjusted (we talked to Danfysik about this and they never mentioned this!).

Sarin will meet with a subset of the Controls group to go over details of operation of our particular supply late in May. We plan to go over certain circuits in detail, especially the fast and slow dump circuits.


???

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