LCLS Intermediate Power Supplies Paul Bellomo, Antonio de Lira, Dave Mac Nair

August 29, 2005 1LCLS Injector Intermediate Power Supply Design Review

LCLS Intermediate Power SuppliesPaul Bellomo, Antonio de Lira, Dave Mac Nair


LCLS Intermediate (LGPS but rack-mounted) Power Supplies

• MCOR Bulk Power Supplies

• Injector Bend, Solenoid, and QB Power Supplies

• Power Supply Controllers and Transductors


MCOR Bulk Power Supply Determination from August 12, 2005 Magnet List

42 MCOR12s and 8 MCOR30s - 58 slots, use 4 - 16 slot crates

Average 18V, 11A from magnet list - 10kW total power required

For a rack of two crates of 16 mixed MCORscrates MCOR V * A2* * * * . kWrack crate MCOR

The total current required in a rack of 32 mixed MCOR scrates MCOR A2* * * * Arack crate MCOR

The current that must be delivere

18 1116 6 3

1116 352

d from the bulk power supply is VA* A V * A . kWV

Use a 60V, 165A 10kW bulk supply to power two crates of MCORs

18352 127 50 127 6 350


Intermediate Power Supplies - Use, Requirement, Ratings, Cost, Delivery

Use Requirement Ratings Cost Delivery

S1S2Contingency

24V, 269A24V, 269A 3 - 33V, 300A, 10kW $24,000

15 weeks

BX01…BX02BXH1…BXH4 (2)Contingency

21V, 335A39V, 335A 4 - 25V, 375A, 10kW $32,000

BXGBXSMCOR Bulk (2)QBContingency

18V, 100A44V, 150A50V, 127A35V, 32A

6 – 60V, 165A, 10kW $48,000

Cost Grand Total $104,000


List of Potential Power Supply Bidders

DanfysikC/o GMW Associates955 Industrial RoadSan Carlos, CA [email protected]

EMI-LambdaC/o Tritek Solutions, Suite 41800 Wyatt DriveSanta Clara, Ca. 94054Mr. Bret McDonald(408) 492-0400 [email protected]

Dynapower Corporation1020 Hinesburg RoadP. O. Box 9210South Burlington, VT 05407802-652-1317Attn: Adam M. [email protected]

IE Power, Incorporated12 Falconer Drive, Unit 15Mississauga, OntarioCanada L5N 3L9905-813-8900Attn: Mr. Bob [email protected]

Elgar Electronics Corporation 9250 Brown Deer RoadSan Diego, CA 92121 Ph - 858-458-0235Ron [email protected]

Matsushadac/o BiRa Systems Incorporated2410 Midtown Place, Suite AAlbuquerque, New Mexico 87107Phone: 505-881-8887Mr. Phillip BiswellEmail: [email protected]

mailto:[email protected]


Seller's Control Loops

Purchaser BitBus Chassis

Programming Voltage

Desired Current Setpoint From LCLS Computer

Monitor Transductor

Feedback Transductor

To Magnet Load

Gate Drivers

ErrorAmp

ErrorAmp

Redundant Current Monitor

LCLS MPS removes ON command if magnet overheats

POWER SUPPLY

Control Power


• 2.5 kW to 22.5 kW• 208 V / 480 V input• Series and parallelable• 27cm H*48cm W*61cm D

What is the desired LCLS color scheme for power supplies and racks, etc?


J1 J2

+ -DC Output AC Input

DC Output Cables

TerminalCover


General or Voltage Source Requirements

Accuracy /Track 0.1 % (1000 ppm) – 10 to 100% Rated VO

Ambient 40OF (4 OC) to 113 OF (45 OC) -

Bandwidth DC to – 3 dB 1,000Hz

Conducted EMC / Life FCC, Part 15, Class A 20 years 100,000 hrs -

Input/PF/EFF 208V-480 V, 3 / 0.9 / 0.85 -

Load 0.05H L 1.0H, 0.1 s L/R 1.0 s -

Regulation < 0.1% for 5% line/20% load Rated VO

Ripple Voltage < 0.2 % PP DC to 1 MHz Rated VO

Current Source Requirements

Bandwidth DC to – 3dB of IO 100Hz

Stability-ambient 2 ppm / O C – 10 to 100% Rated IO


Inputs to Power Supply

On/Off Discrete, continuous +5V On, 0V Off

Programming Voltage Analog 0 to +5V , 0 to FSV or 0 to FSI

Reset Discrete, momentary +5V 100ms pulse

Outputs from Power Supply

On/Off Status Discrete, continuous Low On. High Off

PS Ready Discrete, continuous Low ready, high not ready

Output current Analog From transductors and PS Controller – not from PS

Output voltage Analog 0 to 10V, 0 to FSV

Ground current Analog 0 to 10V, 0 to 100mA


Hazard Analysis

Bleeder resistors Across LF/HF filter capacitors

PPS interface External, upstream redundant AC contactors

Flammable liquids Trace amounts in electrolytic filters

Hazard signs Labels on PS for voltage and heat hazards

MPS interface In Ethernet chassis, open contact removes ON

Protective CB Lockable and covered line-load terminals

Soft-start Prevent input current surge

Totally enclosed AC plug, cover over DC terminals

Other components Non-flammable or fire retardant

Other Use listed components wherever possible and SLAC EEIP inspection prior to or after shipping


8 (1 contingency) Ethernet power supply controllers - $2,000 * 8 = $16,000


GMW Associates955 Industrial RoadSan Carlos, CA 94070650-802-8292 [email protected]

7 systems * 2 /system *$660ea = $9,240

Mounting plates 2 plates * $250 each = $500

mailto:[email protected]


Parameter 150/300&600A

Operating life > 20 years

Output 200mA / 400mA

Burden resistor 5.0 / 2.5

Stability < 0.3 ppm / O C

Offset error< 20 ppm @ 25 O C< 0.5 ppm / O C< 5.0 ppm / month

Absolute accuracy < 2 ppm

Linearity error < 4 ppm

SS bandwidth DC to 100 kHz

Slew rate > 5 mA / S


Cable and Conductor Sizing Per 2005 NEC

Basis – copper conductors, 90C insulation, max 45C ambient, no more than 3 conductors in a cable, cable tray fill per Article 392. Table 310-16 of NEC

Power Supply Basic Ampacity/Derating Conductor Size

33V, 300A 300A/0.87 = 345A 350kcmil 350A, use 500kcmil

25V, 375A 375A/0.87 = 431A 500kcmil 430A, use it

60V, 165A 165A/0.87 = 190A 2/0AWG 195A, use it

60V, 30A 30A/0.87 = 34A #10AWG 40A, use #8AWG

40V, 12A 12A/0.87 = 14A #18AWG 14A, use #12AWG


END !!!

LCLS Intermediate Power Supplies Paul Bellomo, Antonio de Lira, Dave Mac Nair

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