Difference between revisions of "Vicor Power Assembly"

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{{Hierarchy header}}
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{{Related|Power}}
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The MCE can be equipped with a 18–36Vin (24Vin nominal) switching supply designed for use in balloon-based experiments. This unit contains a set of [http://www.vicorpower.com/dc-dc-converters-board-mount Vicor DC-DC converters] that are trimmed to accomodate losses of up to 2m cable, so they can be located up to 2m away from the actual MCE crate.
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The MCE can be equipped with a 24V DC-in or 48V DC-in switching supply designed for use in balloon-based experiments. This unit contains a set of [http://www.vicorpower.com/dc-dc-converters-board-mount Vicor DC-DC converters] that are trimmed to accommodate losses from cables of up to 2-metres, so they can be located up to 2-m away from the actual MCE [[subrack]].
 
== Specification==
 
== Specification==
  
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;DC Input Type
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;DC input
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: 18-36V
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: Either:
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: 3A from 24V to power one 3-MDM MCE48 crate (6A for two)
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:* 24V (18-36V) - Rev. C, Issues 1, 2, 5, 6
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:* 48V (36-60V) - Rev. C, Issues 3, 4, 7
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: 3A at 24V to power one 3-MDM MCE48 crate (6A for two)
  
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; DC output
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;DC output
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:    pVa: 6.1 to 6.3 V
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:    V<sub>a</sub><sup>+</sup>: 6.1 to 6.3 V
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:   nVa: -6.1 to -6.3 V
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:   V<sub>a</sub><sup>&minus;</sup>: -6.1 to -6.3 V
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:    Vlvd: 4.4 to 4.7 V
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:    V<sub>lvd</sub>: 4.4 to 4.7 V
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:    Vcore: 2.9 to 3.2 V
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:    V<sub>core</sub>: 2.9 to 3.2 V
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* ''Note:'' The VPA does not provide the obsolete V<sub>ah</sub> used by rev.A and B [[Readout card]]s and rev.A through D [[Bias card]]s
  
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; Watts: 100W
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; Power: 100W
  
 
; Regulated: Yes
 
; Regulated: Yes
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: 24cm x 20cm x 5cm
 
: 24cm x 20cm x 5cm
 
; Weight:
 
; Weight:
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: < 2kg and a 1m power cable is ~1kg
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: < 2kg and a 1-m power cable is ~1kg
  
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=== Schematics ===
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== Connectors ==
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* Schematics for the Vicor Supplies can be found [http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PowerSupplyVicor/ELE_C585-401_RevC2_VicorPSU_Schematics.pdf here]
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; Input:
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* The schematics for the Wiring harness in the box and the pinout for the Winchester connector: [http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PowerSupplyVicor/ELE-C584-402_RevA_Wiring_Harness.pdf pdf]
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* '''Writing harness''': [http://www.phas.ubc.ca/~scuba2/sc2mce/system/power_supply_of_all_kinds/psu_Vicor/design/protel/vpa-c585-401d/ELE-S585-401C3_Schematics.PDF PDF]
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* '''Connector''': Amphenol PTC-2A-14-5P
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Check the schematics for Input/Output connector pinout.
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[[File:24-48Vin.png|400px]]
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; Output Connector
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; Output:
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: Winchester MRA34SG
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* '''Wiring harness''': [http://www.phas.ubc.ca/~mce/mcedocs/hardware/schematics/PowerSupplyVicor/ELE-C584-402_RevA_Wiring_Harness.pdf PDF]
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;Input Connector
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* '''Connector''': Winchester MRA34SG.  '''[[MCE Power#Connector & pinout|Pinout]]'''
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: Amphenol PTC-2A-14-5P
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* ''Note:'' The VPA can power one 72-HP subrack, or two 48-HP subracks.  Early revisions of the VPA had two output connectors.  Currently, all VPAs have only one Winchester connector for power output, and a wye cable is used when powering pairs of 48-HP subracks.
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== Schematics ==  
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=== Mechanical Drawings ===
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* Vicor Power Supply Rev C2, PCB Schematics [https://phas.ubc.ca/~mce/mcedocs/hardware/schematics/PowerSupplyVicor/ELE_C585-401_RevC2_VicorPSU_Schematics.pdf]
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[http://www.phas.ubc.ca/~mce/mcedocs/mechanical/Spider_PSU_Mtg_AluBoxRevC.zip Mechanical Drawings for Vicor Aluminum Box RevC]
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* Vicor Power Supply Rev C3, PCB Schematics [https://phas.ubc.ca/~mce/mcedocs/hardware/schematics/PowerSupplyVicor/ELE_C585-401_RevC3_VicorPSU_Schematics.pdf]
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== Notes ==
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* Wiring [https://phas.ubc.ca/~mce/mcedocs/hardware/schematics/PowerSupplyVicor/ELE-C584-402_RevA_Wiring_Harness.pdf]
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#The Vicor supply is equipped with two Winchester connectors to power two MCE48 crates. So far, we are able to use a Y cable and power two MCE48 from one connector. When we tried to use each connector separately, with separate cables, oddly enough, the noise performance was degraded.
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== Mechanical Drawings ==
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# We have not used the Vicor supply to power a 5-MDM MCE72 '''yet'''. The power requirements for a 5-MDM MCE are disctributed slightly differently than twice an MCE48 mainly due to LN_BIAS circutries.
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* Assembled Box: [http://www.phas.ubc.ca/~scuba2/sc2mce/system/power_supply_of_all_kinds/psu_Vicor/design/mech/Aluminum_Box/MEC-C585-416D_Enclosure.PDF MEC-C585-416D]
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* Box Lid: [http://www.phas.ubc.ca/~scuba2/sc2mce/system/power_supply_of_all_kinds/psu_Vicor/design/mech/Aluminum_Box/MEC-C585-405D_Enclosure_Lid.PDF MEC-C585-405D]
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* Unfolded Box: [http://www.phas.ubc.ca/~scuba2/sc2mce/system/power_supply_of_all_kinds/psu_Vicor/design/mech/Aluminum_Box/MEC-C585-404D_Enclosure_Box_Unfolded.PDF MEC-C585-404D]
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* Mounting Flange: [http://www.phas.ubc.ca/~scuba2/sc2mce/system/power_supply_of_all_kinds/psu_Vicor/design/mech/Aluminum_Box/MEC-C585-406B_Enclosure_Flange.PDF MEC-C585-406B]
  
 
== Cooling ==
 
== Cooling ==
 
For Spider, the mounting/heat extraction block is bolted to a heat exchanger through which the <sup>4</sup>He blow-off from the cryostat's vapour-cooled shield is vented.
 
For Spider, the mounting/heat extraction block is bolted to a heat exchanger through which the <sup>4</sup>He blow-off from the cryostat's vapour-cooled shield is vented.
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== Photos ==
 
== Photos ==
 
<gallery>
 
<gallery>
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== Testing ==
 
== Testing ==
 
* [[Testing VPA]]
 
* [[Testing VPA]]
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== ==
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* back to [[MCE_Power]]
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[[Category:Accessories]]
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[[Category:Power]]

Latest revision as of 11:12, 22 October 2020

The MCE can be equipped with a 24V DC-in or 48V DC-in switching supply designed for use in balloon-based experiments. This unit contains a set of Vicor DC-DC converters that are trimmed to accommodate losses from cables of up to 2-metres, so they can be located up to 2-m away from the actual MCE subrack.

Specification

DC input
Either:
  • 24V (18-36V) - Rev. C, Issues 1, 2, 5, 6
  • 48V (36-60V) - Rev. C, Issues 3, 4, 7
3A at 24V to power one 3-MDM MCE48 crate (6A for two)
DC output
Va+: 6.1 to 6.3 V
Va−: -6.1 to -6.3 V
Vlvd: 4.4 to 4.7 V
Vcore: 2.9 to 3.2 V
Power
100W
Regulated
Yes
Efficiency
75%
Dimensions (L x W x H)
24cm x 20cm x 5cm
Weight
< 2kg and a 1-m power cable is ~1kg

Connectors

Input
  • Writing harness: PDF
  • Connector: Amphenol PTC-2A-14-5P

24-48Vin.png

Output
  • Wiring harness: PDF
  • Connector: Winchester MRA34SG. Pinout
  • Note: The VPA can power one 72-HP subrack, or two 48-HP subracks. Early revisions of the VPA had two output connectors. Currently, all VPAs have only one Winchester connector for power output, and a wye cable is used when powering pairs of 48-HP subracks.

Schematics

  • Vicor Power Supply Rev C2, PCB Schematics [1]
  • Vicor Power Supply Rev C3, PCB Schematics [2]
  • Wiring [3]

Mechanical Drawings

Cooling

For Spider, the mounting/heat extraction block is bolted to a heat exchanger through which the 4He blow-off from the cryostat's vapour-cooled shield is vented.

Photos

  • Vicor supply attached to a subrack

  • Vicor supply top face with heat pipes

  • Vicor supply attached to a subrack

  • 3 vicor supplies in Spider mounting bracket, connector side

  • 3 vicor supplies in Spider mounting bracket, mounting/cooling side

Testing

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