POWER DESIGNS 6050 Manuale di istruzioni

TECHNICALDATA

MODEL6050

MULTI-RANGE

POWERSOURCE

0-7Vat5A

0-15V

at3A

0-25Vat2A

0-50Vat

0-60Vat0.5A

MODEL6050 UNIPLY™

is a regulatedDC power sourcethat functionallyre-

placesfive conventional power supplies.It utilizes a

new regulator technique which provides additional

featuresnot availablein standard instruments.

Outputvoltageandcurrent rangescoverabroad spec-

trumof laboratory requirementsforboth digitaland

analog applications.

Rangingistransient-freeand automaticwith changes

in loadandthesettingofvoltageandcurrent controls.

Operationis completely electronic, without relaysor

manual switching.

The

RFI-free

regulator system employs linear circuits

only.NoSCR's,switchingtransistorsorhigh frequency

techniquesare utilized.

Power output capabilityofthe supply increaseswith

increasingAClinevoltage.Uptotwice ratedoutputis

"Patents

appliedfor

POWER DESIGNSINC.

1700 SHAMESOR.•

WESTBURY,

l\l.

Y.11590

SIS EOgewood

3-6200

TWX:

510-828-6561

availableatline voltagesover105volts. Useful

regu-

lated outputat reduced levelsis availabledownto a

linevoltageof85volts.

A flashing panel indicator signalslossof regulation

whenload demandsarein excessof control settings

or theACline voltageistoolowto support increased

output levels.

The supplymaybe operated continuouslyintoan

overloador short circuit without damage.

Regulator efficiencyis superiorto conventional,wide

voltage range, dissipativetype systems.

Portableand light,the Model6050is designedfor

laboratory benchorrackuse.A bail/carrying handle

assembly permits tiltingofthe front panelfor viewing

ease.

lA"

panel adaptersare availablefor assem-

blingoneortwo unitsina standard19" rack.

SERIALNO: 70-3

POWER DESIGNS PACIFIC

INC.

33B1

MIRANDAAVE.• PA L O ALTO,CAL.

94306

415-321-6111TWX:

910-373-1251

TECHNICALDATA

MODEL6050

DESIGN FEATURES

• Concentric coarseandfinevoltage controlswitha reso-

lutionof3 millivolts.

•Dual range 0.5/5.0 ampere current

limiter.

Meter range

shifts automatically.

• Remotevoltage programmingat500ohms/volt.

• Remote sensingof output voltage.

• Frontandrear access output terminals.

• Parameter specifications basedon anticipated perfor-

manceafterfiveyearsofservice.

• Semiconductors processed undera "predictable relia-

bility" programto insurelonglife expectancy.This

program includes source codingofall devices,100%

incoming inspectionand measurementof parameters

beyond operating regionsto expose channelingphe-

nomena, surface contamination,safe operating areas,

etc.Zenervoltage referencesandinputstage transistors

are preagedandlife expectancy extrapolated through

l/F

noise change techniques during burn-in.

•Each power supply operated undermaximum stress

con-

ditionsforaminimumof fifty hours priorto final inspec-

tion.

• Manufacturing proceduresand processesare equalto

or exceed thoseof

MIL-Q-9858.

ELECTRICAL SPECIFICATIONS

Input:105-125volts,57-440Hz,100wattsnominal.

Output:0-60voltsDC,continuously adjustablewiththe

fol-

lowing minimum output:

0-7V,0-5A 0-25V,0-2A 0-60V,0-0.5 A

0-15

0-3

0-50

0-1

LineRegulation:0.01%+1 millivoltforlinevariationsfrom

105-125volts.

LoadRegulation:

0.01

%+1millivoltforloadvariationsfrom

0-100%of ratedoutputcurrent, measuredatrear terminals

or atthejunctionofloadandsense leads.Without remote

sensing,

regulationatfront panel terminalsis 0.01%+1.5

millivoltper ampereof output current(dueto bindingpost

voltagedrops).

Polarity:Eitherpositiveornegativeoutputterminalmaybe

operatedat ground potential.

Rippleand Noise:Lessthan1 millivolt peak-to-peakover

0-1MHzbandwithan inputlinefrequencyof60Hz.

Source Impedance:Lessthan0.005ohmatDC,0.1ohm

to 20

KHz,

1.0

ohmto

MHz.

Recovery Time:Lessthan50 microsecondsto returnto

withina 15millivoltbandofthe original voltagefora step

changein ratedloadof10%to100%(1microsecondrise

time).

Stability:Lessthan 0.02%+3 millivoltsper24hours after

warm-upat constant line,loadand ambient temperature.

Lessthan 0.01%+1 millivoltwith external remotepro-

gramming resistance.

Operating Temperature:

0-50°C

atfull

load.

Storage:

-20°Cto

+85°C.

Temperature Coefficient:Lessthan 0.02%per degreeC.

CurrentLimiting: Concentric switch/potentiometerpro-

vides continuous adjustmentof output currentintwo

ranges:0-500

milliamperes,

0-5 amperes.

Metering:

Front panel "edgewise" meteranda selector

switch permits monitoring outputvoltageorcurrentwithan

accuracyof±2%offullscale.Currentrangechangesauto-

maticallywith current limiter range switch.

OutputTerminals:

Front Panel:Three insulated,5-way binding postsfor

posi-

tive,

negativeandground.

Rear Panel: Seven screw terminalsona molded barrier

blockfor positiveand negative output, chassis ground,re-

motevoltageprogrammingandremote sensing.

RemoteProgramming:Rear panel terminalsare provided

for external resistance programmingofthe output voltage.

The ratioofthe programming resistanceto output voltage

is 500ohmspervoltwitha ratio accuracyof±5%,and a

programminglinearityof

0.01

%ofmaximumoutputvoltage.

MECHANICAL SPECIFICATIONS

Dimensions:

8%"

widex

4%"

highx

11%"

deep.

Weight:

15K

lbs.

Finish:

Brushed anodized natural aluminum etched panel

with black nomenclature.Blue vinyl laminated steeldust

cover.Gold iridite bottom plate.

RackPanel Adapters: Brushed aluminum finished panel

5)4"

x19"for mountinga single Model 6050:TypeRRG-3

(unit mountsincenterof panel),Type

RRG-1

(unit mounts

leftorrightsideof panel).

Brushed aluminum finished panel

5%"

x 19"for mounting

two Model6050units,sidebyside:TypeRRG-2.

Price:

$12.50each.

PRICE:

$195.00 F.O.B. Westbury,New York.

Pricessubjecttochangewithoutnotice

PairofpowersuppliesintypeRRG-2PanelAdapter

UnitshowniscalibratedpowersourceModel2005A

POWER DESIGNSINC.

1700 SHAMESDR.•WESTBURY,

IM.

Y . 11590

SIB EOgewood

3-BSOO

TWX:

510-322-6561

POWER DESIGNS PACIFIC

INC.

3381

MIRANDA

AVE.• P A L O ALTO,CAL. 94306

41S-321-B111

TWX:

310-373-1881

UNIVERSALDCPOWERSOURCEMODEL6050

SECTION 1

GENERALDESCRIPTION

1-1.DESCRIPTION

The Model6050isa

wide-range

regulatedDCpower supplyutilizinga new regulator

technique*toprovidea broader spectrumof outputvoltagesandcurrentsthanis normally

availableina single unit.

The system employslinearcircuitryonlyandis

RFI-free.

Operationis completely

electronicwiththeregulator automatically seekingthatmodeofoperation which satisfies

the settingsofthepanelcontrols,theloaddemandandtheleveloftheACinputvoltage.If

theregulator cannot sustainits function,it signalsthis inabilitybya flashing panel

indicator.

Thepower outputcapabilityofthe Model6050increaseswithACinputvoltages above

105volts. Useful regulated outputatreducedlevelsis availabledownto85volts.

1-2. ELECTRICAL SPECIFICATIONS

INPUT: 105-125volts,

57-440

Hz,100watts nominal.

OUTPUT:0-60 voltsDC, continuously adjustablewiththe following minimum output:

0-7V,0-5A;0-15V,0-3A;0-25V,0-2A,0-50V,0-1A;0-60V, 0-0.5 A

LINEREGULATION:

0.01%

+1millivoltforlinevariationsfrom 105-125 volts.

LOADREGULATION:

0.01%

+1millivoltforloadvariationsfrom 0-100%ofrated output

current, measuredatrear terminalsoratthe junctionofloadandsense leads. With-

outremote sensing, regulationatfront panelterminalsis

0.01%

+1.5

millivoltsper

ampereofoutputcurrent(duetobindingpostvoltage drops).

POLARITY: Either positiveor negative outputterminalmay

operatedatground potential.

RIPPLEANDNOISE:Lessthan1millivoltpeak-to-peakover0-1MHzbandwithan input

linefrequencyof60Hz.

SOURCEIMPEDANCE:Less

man

0.005

ohmatDC,

0.1

ohmto20KHz,

1.0

ohmto1MHz.

RECOVERY TIME:Lessthan50microsecondstoreturntowithina 15millivoltbandofthe

original voltagefora stepchangeinratedloadof10%to100%(1microsecondrise time).

STABILITY:Lessthan

0.02%

+3millivoltsper24hours after warm-upatconstantline,load

and ambienttemperature.Lessthan

0.01%

+1millivoltwithexternalremote program-

ming resistance.

*"UNIPLY"

patents appliedfor.

9471-1

6050

OPERATINGTEMPERATURE:0-50°C

full load. Storage:

-20°C

to +85°C.

TEMPERATURE COEFFICIENT:Lessthan

0.02%

per

°C.

CURRENTLIMITING: Concentric switch/potentiometer provides continuousadjustment

of outputcurrentintworanges: 0-500

milliamperes,

0-5 amperes.

METERING: Frontpanel "edgewise"meteranda selector switchpermitmonitoringoutput

voltageorcurrentwithanaccuracyof±2%offull scale. Currentrangechangesauto-

maticallywithCURRENTLIMITER range switch.

OUTPUTTERMINALS: Front Panel- Three insulated,

5-way

bindingpostsfor positive,

negativeandground.Rear Panel- Seven screw terminalsona moldedbarrier block

for positiveandnegative output, chassis ground, remote voltage programmingand

remote sensing.

REMOTEPROGRAMMING:Rear panelterminalsare providedfor external resistance

programmingofthe outputvoltage.Theratiooftheprogrammingresistance to

outputvoltageis500ohmspervoltwitha ratio accuracyof

±5%

anda program-

ming linearityof

0.01%

of maximum output voltage.

1-3.MECHANICAL SPECIFICATIONS

DIMENSIONS: 8-3/8"widex 4-3/4"highx 11-9/16" deep.

WEIGHT: 15-1/2lbs.

FINISH: Brushed natural aluminumetchedand anodized panelwithblack nomenclature.

Blue vinyl laminated steeldustcover.Goldiridite bottomplate.

9471-2

6050

SECTION 2

INSTALLATIONANDOPERATION

2-1.

INSTALLATION

2.1.1

Laboratory Bench.The Model6050isa self-containedunitdesignedfor bench

use.

Nopreliminary processingor unpackingisrequired.Thepower supplyisreadyfor

operationas shippedfromthefactory.A

snap-out,

bail-carrying handle assembly tilts

thefront panelfor viewingease.

2.1.2

Rack Mounting. Brushednatural aluminumfinish 5-1/4"x

19"

adapters

are availablefor mountingoneortwounitsina standard

19"

relayrack.Type

RRG-3

mountsa singleunitinthecenterofthepanel.Type

RRG-1

mountsa singleunitoneither

theleftor rightsideofthepanelfor installationof auxiliary instrumentation.Type

RRG-2

mountstwo Model

6050's

sidebysideona single adapter. Assemblyhardwarekitsare

providedwitheachadapter.

theplastic bumperfeetandhandle assembly interferewith

adjacent

equipment, removethembydisassemblingthebottomplateofthe supply.

2-2.

OPERATION

2.2.1

Operating Procedure

(a)BesuretheAC switchisoffandshortinglinksonrear terminal block

betweentheDC+andSENSE+,DC-andSENSE-,1and2 are tightened

securely.

(b)SettheCURRENTLIMIT smallbarknobtothedesired output current

range.Notethatthefull scale readingofthe meterwillcorrespondtothe switch position.

Setthe largeCURRENTLIMITADJUSTcontrolfully clockwise.

(c)Setthe metermodeswitchtoVOLTS.

(d)

ConnecttheAClinecordtoa sourceof 105-125volts, 57-440Hz.

(e)Ifremote sensing, remote programming, current limitingor series

operationisdesired,seerelevantparagraphsinthis section.

(f)TurnACswitchon.ACindicator should light.

(g)SetthelargeVOLTAGEcontroltothedesired valueofoutputvoltage.

TheFINEADJconcentric controlpermitsfine adjustmentoftheoutputvoltagewith a

resolutionof3 millivolts.

(h)

ConnecttheDC+andDC-outputterminalonthefront panelandrear

panel to theload.Thepositiveor negative outputterminalmaybeoperatedatground poten-

tialbymeansofa jumperorleft floating,ifdesired.Iftheoutputterminalsareleft

floating,alargeACpotentialattheACline frequencymaybe introducedintotheload

9472-1

6050

throughcommonmodecouplingbetweentheACline,powersupply,loadandACline

operatedinstrumentsconnectedtotheload.Acapacitor(about1microfarad,100VDC,

paperorfilm dielectric)connectedfrom eitherDCoutputterminaltogroundterminal

willreducethisrippletoa satisfactory level.

2.2.2

OperationAboveRatings

Theoutputvoltageandcurrentratingsofthesupplyarelistedonthefront panel

abovethemeter.At

inputlinevoltagesover105volts,thepowersupplymaybe

operatedatvoltageandcurrent levelsabovetheseratingswithoutsupplyoverloador

damage.Simplyincreasetheoutputvoltageoroutputloadcurrenttothedesiredvalue.

thepowersupplyregulator systemcannot supporttheincreasedoutputduetopossible

linevoltageinadequacyorsupplylimitations,itwill signalthisinabilitybytheflashing

LIMITindicator.Thepowersupplymaybeoperatedindefinitelyintothisoverloadmode

(flashing indicator)withoutdamage.

Similarly,thesupplymaybeoperatedbelow105linevoltsatreducedoutputlevels.

Theflashing limit

indicator

willfunctionasa guidetoregulator capability.

TheCURRENTLIMITcontrolswillcontinuetofunctionevenwhenthepowersupply

operatedbeyondtheratingsonthefrontpanel.Itmaystillbeusedtolimitmaximum

outputcurrentsbyadjustmentofthesecontrols.

Whenoperatingthesupplyaboveratings,thelimit indicatormaysuddenlystartto

flash.This signalsthattheACinputvoltagehasdroppedbelowa levelnecessarytosup-

porttheincreasedoutputpower.

NOTE:NeveroperatetheModel6050aboveitsmaximumratedACinputlinevoltageof

125volts

for

increasedpoweroutput.

2.2.3

RemoteSensing

The

regulator

systemoftheModel6050isanoperational amplifierwithinput

terminals (senseleadsS+and

S-)

maintainingtheregulatedoutputvoltageatthepointof

connectiontothepositiveandnegativepoweroutputterminalsof

tiie

supply(DC+andDC-).

Whentheseleadsareconnectedatthesupply (shortinglinksbetween

Sense*

andDC+,

Sense-andDC-on

the

rear terminalblock),thepowersupplyisconnectedfor localsens-

ing.Whenthe shortinglinksareremovedandthe senseleadsconnectedtothepower

outputleadsattheload,thesupplyisconnectedfor remote sensingandtheoutputvoltage

is compensatedforvoltagedropsduetotheDCresistanceofthepowerleads.

Remote sensingmayintroduce substantialphaseshiftathighfrequenciesbetween

the sense(input)terminalsofthe amplifierandthepower(output)terminalsduetothe

inductivereactanceofthe senseandloadleads.Thisconditionmaybecorrectedbythe

additionofa highfrequency,low

impedance

capacitor acrosstheoutputofthesupplyat

thejunctionoftheloadandsenseleads.Atantalumor electrolytic capacitorof suitable

voltageratingandlowimpedancecharacteristicsshouldbeused.Thecapacitanceshould

be largeenoughtocorrectforpoordynamicregulationduetothereactanceofthepower

outputleadsifthe

load

isswitchedor pulsed.

" «

2-2

G050

For remote sensing:

(a) Removethe shortinglinksfromtherear terminal blockDC+and Sense+

andDC-andSense- terminals.

(b) Connectthe

DC+

andDC-terminalstothe load.Usetwisted#18AWG

or heavierwirefor minimum reactance.

leadsatthe load.Runthe sense leadsasa tightlytwisted, shieldedpair,ifpossible.Wire

sizeisnotimportantunlesslongrunsare involved (over twentyfeet). Connectthe shieldto

GROUNDterminalatthe supplyto minimize electrostatic noise pickup.

2.2.4

Serie

Oper

ation

As manyasthree Model6050suppliesmaybeconnectedinseriestoprovideupto

180volts output,at

0.5

ampereorupto21voltsat5 amperes. ConnectthepositiveDC

outputterminalofone supplytothenegative outputterminalofthenext,in

Hie

same manner

as connectingbatteriesinseries.The groundterminalsonallunitsmaybeleftfloatingor

tiedtogetherandconnectedtoeitherthemostpositiveormostnegative output terminal.

CAUTION:THEVOLTAGEANDCURRENTLIMITCONTROLSOFALL SERIESCON-

NECTEDMODEL6050UNITSSHOULDBESETATTHESAME LEVELTO

AVOIDHEAVYREVERSECURRENTSFLOWINGINONEOFTHE SUPPLIES

WHENTHEREGULATORISINTHECURRENT LIMITEDMODEANDTHE

OUTPUTISREVERSEDBYTHEOTHER SERIES-CONNECTED SUPPLIES.

THEMODEL6050SHOULDNEVERBE OPERATEDINSERIESWITHANY

OF THELIMITINDICATOR LAMPSFLASHINGFORMORETHANA SHORT

PERIOD.

For optimum voltage regulation, disconnectthe shorting linksbetweenall Sense+

andDC+outputterminals exceptthoseatthemostpositive potential.Thenconnect jumper

wiresbetweeneach Sense+andSense-terminalonthenextmore positive power source.

Thevoltage dropsinthe leadsconnectingthepower sourceswillbe compensatedforbythe

regulator circuitsofthe individualunits.For remote sensing, follow

these

directions,

exceptconnect

the

mostpositiveandmost negative Sense+and

Sense-

leads acrossthe

load.

2.2.5 Parallel Operation

Parallel operationofthe Model6050isnot recommended.

2.2.6 Remote Voltage Programming

Theoutputvoltage

can

beprogrammed remotelybyanexternalfixedor variablere-

sistanceas follows:

(a)Turnoffthe power source.Setboth voltagecontrolstozero (extreme

counterclockwise position).

947

2-3

6050

(b) Removethe shortinglinkfrom betweentherear panel1and 2

terminals.

voltageby500(theprogrammingconstantis500ohmsper volt).Aconstantcurrentof

2milliampereswillflow throughthisresistance,andthewattage rating shouldbe chosen

to minimize driftdueto heating.

(d) Connecttheexternalprogrammingresistance betweenthe1and 2

terminals, usingtwisted, shieldedwire. Connectthe shieldtochassis ground(Gterminal)

to minimize output ripple.

(e)Turnonthepower source.

CAUTION:IFTHE REMOTEPROGRAMMINGCONNECTIONSARE OPENEDWHILETHE

SUPPLYISOPERATING,THEOUTPUTVOLTAGEWILLRISETOA LEVEL

AS HIGH

70VOLTS,DEPENDINGUPONOUTPUTLOADCURRENT.IF

ASWITCHISUSEDTOSELECTRESISTORSFOR OUTPUTVOLTAGEPRO-

GRAMMING,USEONEWITHSHORTINGTYPECONTACTSTOAVOID

VOLTAGETRANSIENTSPRODUCEDBYOPENINGTHEREMOTEPROGRAM-

MINGTERMINALS.

2.2.7

Current Limiting

The maximum outputcurrentmaybelimitedtoanyvaluefromzeroto

tkz

maximum

outputcurrent

rating

ofthe supplyatanypreset outputvoltage level.

(a)Set

t>.e

CURRENTLIMITbarknobtothedesired outputcurrent

ra-jo

0.5

or5 A.

(b)Withloadconnectedtothe supply,turnthelarge concentricADJUST

knobfully clockwise.

(c)TurnADJUSTcontrol slowlycounterclockwise untilthe LIMITlamp

flashes,thenclockwise until flashingjust stops.Thecurrent limit operating threshold

is then approximately10%abovethe actualload current.

NOTE:

theloadcurrentisgreaterthanthatshownonthefront paneltablefora given

outputvoltage,the LIMITlampmay starttoflashwhen

Hie

AClinevoltage

falls

to a level whichcannot supporttheincreased output.This signal indicatesAC

inputvoltage inadequacyratherthancurrent limiter circuit operation.

116

2-4

MODEL6050

TableshowingtypicalincreaseinusefuloutputwithincreasedAC

inputlinevoltage.

Output

Voltage

RatedOutput

Current(Amperes )

3.0

2.0

1.0

0.5

^Maximum

OutputCurrent

(Amper es )

105

V A C

Line

5.5

3.8

2.5

2.25

1.45

1.3

1.2

1.1

115V A C

Line

5.5

4.2

3.8

2.8

2.4

2.0

1.4

1.3

1.25

125VA C

Line

5.5

5.2

3.8

3.6

2.5

2.4

1.75

1.45

1.4

**Increasein

Power

Output

10$

73$

26.

5 $

80$

25$

140$

75$

45$

40$

180$

*Withinratedpowersupplyregulationandripple

specifications.

**At

125

VACinput.

6050

THEORYO FO P E R A T I O N

3-1.

GENERAL

The Model6080isa voltage regulatedDCpower sourceofthe conventional series

dissipativetypeina unique

configuration*

whichprovides regulator efficienciesand operat-

ingfeaturesnotcommonly availableinthis regulator type.

Theconventional dissipative voltage regulator comprisesanunregulatedDC

source,

avariable electronic resistance (power transistor)inserieswiththe unregulated sourceand

the load,an amplifier whichmeasuresthe differenceinvoltage betweena voltage reference

andsome fractionofthe output voltage obtained througha resistor divider acrosstheload

andamplifiesandappliesthis differencetothe series controltransistortovaryits resist-

anceinsucha directionas to maintainthe output voltage constantinthepresenceofload

currentandunregulated input voltage variations. Sincetheseries control elementisef-

fectivelyaresistance,itwilldissipate powerintheformof

heat,

depending uponthe voltage

acrosstheresistanceandthecurrent throughit.The output voltageoftheregulatorisad-

justedby varyingthe voltage reference,theresistor divider ratioor both.Ina wide output

range regulated supplythepower dissipatedinthe series elementincreaseswith increasing

unregulated source voltage, increasing outputcurrentandreduced output voltages.

The

UNIPLY^

regulator utilizesa numberofunregulatedDCsources,anumberof

powertransistors,aseriesof diode"OR" gatesanda single control amplifier which selects

thatcombinationofunregulated sourceand series powertransistor whichbest satisfiesthe

output voltageandloadcurrent requirements, maintainingatthesametimethe minimum

available voltage difference betweenthe unregulated sourceandandthe load.By proper

selectionof unregulated sourceandseries powertransistor characteristics,itis possible

to designa regulatorwithessentially constant outputpower,i.e.asthe output voltageis

decreased,the available outputcurrentis increased.Thepowerlossesinthe regulator

remain approximately constant, independentof output voltageor current.

As a guideinunderstandingor maintenanceofthe Model 6050,this section provides

a step-by-step descriptionofeachcircuitandeach component function. Referencetothe

Schematic Diagraminthe Appendixis recommended.

3-2.ACPOWERSOURCE

AC inputpower(105to125VAC,57to440Hz)is

applied

througha

3-wire

powercord

equippedwitha

3-blade

NEMAplug.Thehotside (blackwire)oftheACflows throughfuseFl

(whichprotectsthe equipmentincaseof internal failure) throughtheAC switch

SI,

which turns

on thepower supply,totransformer(Tl)primary terminal115.The othersideoftheAC

inputpowergoestoterminal0oftransformerTl. Acrossterminals0 and115of transformer

Tl isaneonlamp,

DSl,and

series current limitingresistor,R35, whichindicatewhenthe

supplyhasbeenenergized. TransformerTl transformstheACinput voltageintothe required

secondary voltages.

*Trademarked UNIPLY®

. Patents appliedfor.

1353-1

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