GEMotors

Series9000Large Synchronous Machines

Up to 15,000 VoltsUp to 100,000 HP (75,000 kW)4 Pole and AboveMotors and Generators

1

Experience is CriticalWe’ve manufactured motors for over 100 years.GE Motors has the capability to design and manufacture electrical rotatingmachines up to 100,000 HP, and have supplied over 800,000 HP of motorsfor variable speed applications. This century of achievement has built a richtradition of technical excellence, quality and reliability.

Standards & CertificationsGE has the capability to design electrical rotating machines that complywith global standards and certifications, including but not limited to NEMA,IEC, API, Lloyds, ABS, ATEX and PTB. Imperial (english) or metric systemscompliant components are available per customer specification.Our manufacturing facilities are ISO 9001 certified.

Why Synchronous Motors?• High efficiency - increased operating cost savings

• Low starting current - provides better overall starting capability, which reduces the starting equipment cost.

• Unity or leading power factor – reduced utility penalties associated with lagging power factor.

• Reduced current pulsations for non-steady-state loads, e.g., reciprocating compressors - improved electrical system reliability.

ApplicationsCompressors, grinding mills, metal rolling, mine hoists, refiners, propulsion,fans, pumps, generators and many others.

Industries- Oil & Gas - Cement - Pulp & Paper- Mining - Metal - Water & Wastewater- Power & Energy - Marine - Other Process Industries

GE AdvantagesQuality

• GE motors are legendary for their efficiency, reliability and long life.

Global Presence• GE is a global company with operations in over 100 countries and

manufacturing facilities in 32 countries

Investing in Products That Customers Need• Our innovative 4 and 6 pole rotor design made from a single-forging

provides maximum reliability.

• Our unique QuadramaticTM load sharing motor system for dramatically improved performance and less wear than traditional grinding mill systems.

• Our unique Rotector II system gathers real time readings and direct measurements to help optimize performance at all times.

2

Ventilation, Enclosures & Assembly

Enclosure NEMA IP Code IC CodeOpen Open IP00 IC-01Drip Proof DP IP12 IC-01Drip Proof, Fully Guarded DPFG IP22 IC-01Drip Proof, Guarded DPG IP22 IC-01Splash Proof SP IP23 IC-01Weather Protected I WPI IP23 IC-01Weather Protected II WPII IP24 IC-01Totally Enclosed, Water to Air Cooled TEWAC IP54 ICW-81Totally Enclosed, Air to Air Cooled TEAAC IP54 IC-616Totally Enclosed, Force Ventilated TEFV IP54 IC-37Totally Enclosed, Inert Gas Filled TEWIGF IP54 ICW-81

All of the above total enclosed options are available with pressure and/or purge systems to hazardous location classifications.

Weather Protected Enclosure(WPI, WPII, IP24, IC-01)

Totally Enclosed, Force Ventilated Enclosure(TEFV, IP54, IC-37)

Totally Enclosed, Water-to-Air Cooled Enclosure(TEWAC, IP54, ICW-86)

Totally Enclosed Air-to-Air Cooled Enclosure(TEAAC, IP54, IC-48)

Stator Construction

StatorThe fabricated steel plate statorframe consists of two or more sideplates continuously welded to thewrapper plates and rectangular steelblock feet to provide a rigid statorsupport. The strength of this framemaintains a uniform air gap underall operational stresses.

Stator laminations are precision-punched from high-quality low-losselectrical sheet steel which are coatedwith a thermally stable insulation film(C5 coating) to minimize eddy currentlosses. The laminations are assem-bled in accurate alignment within thestator frame to form the stator core.Ventilation ducts are formed fromsturdy “I” beams spaced for strengthand noise control. The core is clampedunder heavy uniform pressure in theframe to prevent distortion. The result-ing assembled stator structure hassuperior strength and rigidity, whichwill promote quiet performance, longlife and trouble-free operation.

Bracket FrameStatorGE Motors can manufacture bracketbearing machines up to 67,000 HP(50,000 kW) and offers pedestalbearing machines throughout ourproduct range.

The bracket frame is similar in con-struction to the Pedestal machines,except that the frame extends pastthe end of the winding in order tomount heavy gauge fabricatedsteel endshields and the bearings.This type of machine has the corepiled outside of the frame. The coreis wound and then mounted intothe frame.

BracingRigid support of the stator coil ends iscritical to the ability of the machineto withstand the mechanical forcescaused by starting, external shortcircuits and impact loading. GE’sbracing systems are specificallydesigned for the machine application,and use materials and processes togive optimum strength to withstandthe applied mechanical forces.

Insulation is KeyThe advanced insulation systemprovided on all large motor productswill reward you with many years ofreliable operation, whether on fixedor adjustable speed applications.

GE’s insulation systems are designedto minimize the effect of localizedelectrical stress and reduce theeffects of partial discharge, increas-ing machine life and reliability.Components are carefully chosenfor compatibility with the system asa whole. The insulation system issubjected to rigorous testing accord-ing to applicable IEEE, IEC, NEMAand API standards.

All but the very largest wound statorsundergo global vacuum-pressureimpregnation (VPI) treatment. Thisprocess employs automated capaci-tance monitoring to ensure that eachstator winding is fully impregnatedwith epoxy resin. After curing, it bindsthe stator components into a solidand rigid structure with excellentdielectric strength, dimensionalstability, and mechanical strength.It also increases the resistance of thewinding to thermal shock, moistureand other contaminants.

Adjustable frequency drives canplace additional stresses on themachine’s insulation system.GE has significant experience withthese technical requirements and isable to tailor the motor and motorinsulation systems to meet themost demanding applications.

Bracket bearing machine construction

Complete stator assemblymounted in frame.

Pre-wound stator core readyfor vaccuum pressureimpregnation (VPI)

3

Rotor Construction

High Speed4-6 Pole Solid RotorsHigh speed rotors need maximumstrength and stiffness to provide along life. GE Motors makes its highspeed rotor from a solid cylindricalforging and machines out the polebodies and pole tips. The field wind-ings are edge wound copper stripswith dimensionally stable insulationmaterial bonded between the turns.Every turn has mechanically lockedand brazed corner joints for maxi-mum strength and every other turn islarger for more efficient cooling.

GE Solid Rotor Design Benefits• High thermal capacity – more

frequent starts and/or high load inertia capability

• High operating efficiency leads to minimal operating costs

• Fewer components

• Reduced mechanical stress

• Improved mechanical stability from minimal vibration levels

• Proven experience from a technology innovator

Medium Speed8-14 Pole Rotor ConstructionMedium speed machine shafts aremanufactured of forged or rolledsteel and machined to exact applica-tion specifications. The shaft endsare normally cylindrical, taperedor flanged.

Low SpeedGreater than 14 polesLow speed machine designs areanother strength for GE Motors.Our rotor designs typically includea forged steel shaft along with afabricated steel hub, web and rim tosupport the field windings. The rimdiameter and thickness is selected tosuit the inertia requirements as wellas meet the electrical requirementsof the design. Field windings areoptimized to suit the applicationutilizing rectangular copper wire orcopper strip – all provided with ourwell-proven Class F insulation system.The amortisseur winding design, akey to reliability, is also optimizedto suit the specific application.

4 and 6 pole solid rotor construction

Strip wound field poles,are slid onto the spiderand locked into place with steel keys.

Slow speed bolted poleQuadramaticTM rotorconstruction

A 4-pole rotor startsas a single, steppedforging.

The shaft ,spider andthe 4 poles and poletips are created bymachining awaypart of the forging.

The stripwound fieldwinding is added tocomplete the rotor.

4

Customer Solutions

QuadramaticLoad Sharing DriveFor grinding mill applications,GE has developed a drive using two,high efficiency, synchronous motordriven pinions on one bull gear.A Quadramatic™ load sharing driveuses a special winding in addition tothe amortisseur winding to dynami-cally alter the rotor flux. Thesecontinuous adjustments maintainthe load sharing between the twopinions reducing wear andimproving performance.

ExcitationBrushless Excitation SystemThis arrangement is generally usedacross all segments of industry as itrequires minimal maintenance and iswell suited for hazardous or contami-nated environments. The solid statecomponents utilized are liberallyrated and chosen specifically toendure the high mechanical andelectrical stresses experienced onthe most challenging applications.

Collector Ring ExcitationThis arrangement consists of carbonsteel or stainless steel slip ringsmounted on, and insulated from, therotor shaft. The rings have a groovedsurface to ensure effective coolingand proper current sharing amongthe brushes. Depending upon currentloading, additional cooling can beprovided by means of annular cool-ing fins. This arrangement is com-monly used on high performancevariable speed motor applicationswhere a particularly fast responsemay be required.

Rotector IIFaster Startups. Reduced Downtime.Rotector II is designed tocontinuously monitor and protectlarge machines from potentiallycatastrophic failures. By monitoringthe field winding temperature, keycomponent temperature and fieldwinding insulation resistance, down-time can be minimized and mainte-nance can be scheduled at the firstsign of potential problems. Byemploying the latest digital teleme-try, Rotector II offers a significantadvancement over older analogtechniques. The result is high dataintegrity and accuracy even in themost difficult environments experi-enced by large machines.

Rotector II provides improved rotorprotection in the following ways:

• Real time field current and voltage readings.

• Direct temperature measurement of key rotor components.

• “First fault” rotor ground fault detection during operation or while stationary.

• Diode failure detection.

All these features minimize commis-sioning time, increase reliability,reduce maintenance costs and allowoptimized performance at all times.

Pick-up Loop

Rotor

Rotector IITransmitter

Interface Module

Rotector IIReceiver

Series 90/30GE Fanuc PLC

Machine Mounted

Serial Data Cable

Mounted Remotefrom Machine

Close up of a Quadrature Axis windingon a bi-directional rotor

Brushless exciter contruction completewith starting resistor.

5

Bearings, Enhancements, Testing

Bearings• Cylindrical, two lobe or four lobe

sleeve bearings• Tilting pad bearings• Axial thrust bearings - horizontal

and vertical

Both pedestal and bracket bearingmachines are available based onapplication requirements.

Lubrication• Oil ring and/or flood lubrication• High pressure lift option available• Run down tanks

Enhancements• Partial Discharge Sensor Kits• Air RTD (Resistance Temperature

Detectors)• Space Heaters 50/60 Hz,

up to 550 volts• Large oversized fabricated steel

main terminal box - frame mounted or freestanding arrangements are both available.

• Surge arrestors and/or Surge Capacitors

• Current and Potential Transformers• Vibration monitoring equipment• Couplings• Every machine is equipped

with Resistance Temperature Detectors (RTD) to monitor stator winding temperature.

TestingGE Motors has a world class testfacility at Peterborough. Extensiveexperience in the performance ofrotating machinery with all forms offixed and variable-speed drives hasbeen accumulated. Each machine istested at the factory before installa-tion in the field, thus reducing set-uptime. GE Motors can also performsystems tests with a drive and usingback to back testing.

• In Process testing

• Complete Electrical Tests

• Mechanical Testing including “runout”

• Back to Back Testing

• Efficiency Measurements

• Complete system test with drives and transformers

Custom conduit box complete with lightningarresters, surge capacitors and currenttransformers.

Every machine is tested in-housein a state-of-the-art facility to fulfillrequested standards includingstringent API requirements.

Pedestal Sleeve bearing

Solid 6 pole machine, with pedestal bearings,brushless exciter and rotating dischargestarting resistors after final testing.

6

GE MotorsFort Wayne, IN 46802Motors 800 541 7191

Parts 800 458 0451

www.gemotors.com

8 2007 General Electric Company All Rights Reserved.GE and g are trademarks of General Electric Company.

DEA-M1045 1207

The right solution for your application.

• High Efficiency Designs• Pro-Engineer™ Systems Modeling• On-site Research and Development• Quadramatic Load Sharing• Solid Integral Pole Tip High Speed

Rotor Design• 50 MVA of test capabilities

The right peoplefor your solution.

• Power Solutions TeamExperienced application engineers are available to solve your toughest motor or generator system’s problems.

• Large Motors Services TeamDo you have equipment over 20 years old? Do you need more from existing motors? Would you like to know what condition your motors are in?Call us, we can help!

• Application Engineering TeamNew equipment & installations

Customer Service