DRIVES & CONTROLS SERVICES, INC. EXCAVATOR ELECTRICAL ... · accomplished by varying dc current...

DRIVES & CONTROLS SERVICES, INC.

EXCAVATOR ELECTRICAL CONTROL SYSTEMS

SAFETY ENHANCEMENTS OF DIGITAL DRIVE

REGULATOR CONTROLS

VISIT US AT DRIVESANDCONTROLS.COM

HIGH HORSEPOWER AC SYNCHRONOUS MOTORS DRIVING LARGE DC GENERATORS.

MOTOR/ GENERATOR“MG SETS”

MG SETS DRIVE LARGE DC MOTORS FOR HOIST, DRAG/CROWD, SWING AND PROPEL MOTION CONTROL

CONTROL OF THE HOIST, DRAG/CROWD, SWING

AND PROPEL MOTIONS IS PROVIDED BY THE

LARGE DC GENERATORS

CONTROL OF THESE GENERATORS IS

ACCOMPLISHED BY VARYING DC CURRENT TO THE

GENERATOR SHUNT FIELD WINDINGS.

CONTROL OF

GENERATORS

WITH SILICON

CONTROLLED

RECTIFIERS

(SCR) DRIVES

SCR DRIVES PROVIDE

CONTROLLED DC

CURRENT TO THE

GENERATOR FIELDS AS

REQUIRED BY THE

SYSTEM REGULATOR

1 2 3 1 2

1 - 23 - 2 1 - 3 2 - 3 2-1 3 - 1 3 - 2 1 - 2

GENERATOR FIELD EXCITATION VOLTAGE

GENERATOR OUTPUTVOLTAGE

GENERATOR FIELD EXCITATION VOLTAGE

GENERATOR OUTPUTVOLTAGE

SOME SYSTEMS INCORPORATED THE USE OF TWO

GENERATOR FIELD CIRCUITS – ONE FOR EACH

DIRECTION OF MACHINE MOTION

DUAL FIELD

CONTROL

HOIST – LOWER

DRAG – PAYOUT

CROWD – RETRACT

SWING LEFT - RIGHT

DUAL FIELD CONSTRUCTION

SINGLE FIELD CONSTRUCTION

GShunt Field

SeriesField

CommField

PoleFaceBars

Shunt Field

SeriesField

CommField

PoleFaceBars

PEAKPOWER POINT

VOLTAGE LIMIT

STATIC LIMIT

DYNAMIC LIMITSTATIC + 25%

58% 72%

595 VOLTS

PEAK POWER LOADS MUST NOT EXCEEDTWO MINUTE DURATION

RMS CURRENT MUS NOT EXCEED RATEDCURRENT OVER ANY FIVE MINUTE PERIOD

20 40 60 80 100

PERCENT RATED STALL CURRENT

110% STALL SETTINGFOR SCR CONTROLLEDEQUIPMENT

RMS CURRENT ON ANY APPLICATIONMUST NOT EXCEED RATED MOTORCURRENT - RESPONSIBILITY FOR WHICHSHOULD BE RECOGNIZED AND ACCEPTEDBY EXCAVATOR BUILDER

STALLFRAME AMPS RPM 804 200 1420 806 300 1245 808 450 1125 810 660 1075 812 860 1025 814 1250 955 816 1670 930 818 2130 820 820 2700 800 822 3600 740 824 4500 700

EQUIPMENT MANUFACTURERS SPECIFY THE

ELECTRICAL AND

MECHANICAL LIMITS

FOR THE MOTORS

AND GENERATORS

TYPICAL

ELECTRICAL

AND MECHANICAL

LIMITS

VOLTAGE LIMIT

STATIC LIMIT

DYNAMIC LIMIT

20 40 60 80 100 125 %

PEAK POWER POINT

THE SYSTEM INTEGRATOR NEEDS TO DESIGN

AN ELECTRICAL CONTROL SYSTEM TO OPERATE

WITHIN THESE ELECTRICAL AND MECHANICAL

LIMITS.

SYSTEM REGULATOR

DESIGN CRITERIA

20 40 60 80 100

MOTOR LIMITSFOR WEAK FIELD

MOTORS AND GENERATORS NEED TO BE

PROTECTED FROM EXCESS VOLTAGE,

CURRENT AND SPEED

THE CONTROL PROVIDES

PROTECTION TO THE

MOTORS AND GENERATORS

OPERATIONAL TESTING CONFIRMS

CONTROL SYSTEM FUNCTIONS

VOLTAGE VS. CURRENT

PLOT SHOWING SYSTEM

OPERATING WITHIN THE

PRESCRIBED ELECTRICAL

LIMITS

DCGENERATOR

PLCAllen Bradley

ControlLogix 5000

SIEMENS6RA70SCR

GENERATORFIELD

EXCITER

OPERATORMASTERSWITCH

AC POWER460 VAC 3 PH

MECHANICALLOAD

VOLTAGE FEEDBACK

CURRENT FEEDBACK

ACSYNC

23 KV TRAIL CABLE POWER

7.2 KV 23 / 7.2 KV TRANSFORMER

CONTROL POWER230 VAC

SIEMENS6RA70

SCR MOTORFIELD EXCITER

SIEMENS6RA70 SCR

SYNC MOTORFIELD EXCITER

7.2 KV/480 VAC AUX POWER TRANSFORMERS

480 VACTO MOTOR CONTROLCENTERS

RESISTORDIVIDERCIRCUIT

DATAFORTHISO/AMPLIFIER

METERINGSHUNT

7.2 KV PT

CURRENT TRANSFORMERS

STARTCO -MOTOR PROTECTION RELAY

FUSEDVACUUM

CONTACTOR

SYNC MOTOR FIELD APPLICATION CONTACTOR

8 KV DISCONNECTSWITCH

23 KV DISCONNECTSWITCH

LIGHTING TRANSFORMER

TO LIGHTINGDIST PANELS

333KVA

DCMOTOR

DCSOURCE

VOLTAGE

CURRENT

GShunt Field

SeriesField

CommField

PoleFaceBars

RESISTANCE

TEMPERATURE

EARLY CONTROL SYSTEMS INCORPORATED LITTLE

PROTECTION TO THE MOTORS AND GENERATORS

NO PROTECTION FOR:

OVER CURRENT

OVER VOLTAGE

MOTOR OVER SPEED

OVER TEMPERATURE

UNBALANCE

GROUND FAULT

COUPLING FAILURE

TYPICAL FOR A SYSTEM OF THIS DESIGN TO BE

PROTECTED BY FUSES TO THE SCR EXCITER DRIVE

REGULATOR CONTROL SYSTEMS WERE MADE UP OF

ELECTRONIC COMPONENT BOARDS (CARDS) AS SUB

ASSEMBLIES

MULTIPLE CARDS REQUIRED MEET THE

ELECTRICAL DESIGN REQUIREMENTS

TYPICAL SCR DRIVE COULD

HAVE UP TO 12 ELECTRONIC

COMPONENT BOARDS

REGULATORS COULD HAVE

UP TO 14 BOARDS PER

MOTION

ELECTRONIC BOARDS WERE INTERCONNECTED

BY BACKPLANE WIRING TO BUILD THE SYSTEMS

WIRE WRAP AND TERMI-POINT CONNECTIONS

BETWEEN ELECTRONIC COMPONENT BOARDS

ELECTRICAL ADJUSTMENTS TO REGULATORS

MADE BY POTENTIOMETERS

“ONE TURN” POTS

DIFFICULT TO ADJUST.

ANALOG REGULATOR

SETTINGS “DRIFT”

MOTOR GENERATOR PROTECTION PROVIDED BY

“WALL OF ELECTRO-MECHANICAL RELAYS”

CONTROL RELAYS FOR SYSTEM COORDINATION

OPERATIONALAMPLIFIERREGULATOR

SCRGENERATOR FIELD EXCITER

MASTERSWITCH

AC POWER 480 VAC

MECHANICAL LOAD

ROTATING MOTORFIELD EXCITER

VOLTAGE FEEDBACK

CURRENT FEEDBACK

GENERATOR FIELDOVERCURRENT RELAY

ADDITIONAL SPEED AND TORQUE CONTROL OF

THE LARGE DC MOTORS PROVIDED BY ROTATING

DC EXCITER GENERATORS

DC EXCITER

GENERATORS

SUBJECT TO HIGH

MAINTENANCE

OUTPUT DRIFTS

WITH TEMPERATURE

GShunt Field

SeriesField

CommField

PoleFaceBars

DAWN OF A NEW DAY (ERA)

COMPONENTS FOR AND INTEGRATED CONTROL SYSTEM

PLC CONTROL

DIGITAL DRIVES

OPERATOR

INTERFACE

OPERATOR

CONSOLE

DIGITAL DRIVE CONTROLS

MINIMIZE COMPONENT

DIGITAL REGISTERS

INSTEAD OF

ADJUSTMENT POTS

INTERNAL PROTECTION

PROGRAMMABLE LOGIC CONTROLLER (PLC)

REPLACES ELECTRO-MECHANICAL RELAYS

ALLOWS FOR GREATER PROTECTION OF MOTOR

GENERATOR EQUIPMENT

CENTRALIZED ACCESS FOR TESTING AND

TROUBLE SHOOTING

COMPREHENSIVE SYSTEM

DOCUMENTATION AND

WORK SPACE

OPERATOR CONSOLE CONSOLIDATES CONTROL

FUNCTIONS –

EMPLOYS

“JOYSTICK”

CONTROLLERS

OPERATOR INTERFACE TERMINAL – MACHINE

STATUS – PRODUCTION RECORDING – FASTER

TROUBLE SHOOTING

INTERFACED WITH

PLC – MONITORS

MACHINE STATUS

CAPABLE OF REMOTE

ACCESS VIA RADIO

MOTOR CONTROL CENTERS

CONSOLIDATES

CONTROL OF

SUPPORT EQUIPMENT

BLOWERS

COMPRESSORS

DECK WENCHES

INCORPORATION OF AUXILIARY CONTROLS

SUCH AS THE LUBE SYSTEM

COMMUNICATE TO

OPERATOR

SYSTEM STATUS

FAULTED SYSTEMS

RE-SET CYCLE

TIMERS

DAWN OF A NEW DAY (ERA)

RED SKY AT MORNING……

SYSTEM INTEGRATION:

THE PLC AND DIGITAL DRIVE SYSTEM MUST BE

COORDINATED TO REGULATE AND PROTECT THE

MOTORS AND GENERATORS.

SYSTEM INTEGRATION:

PLC CONTROL VS. DIGITAL DRIVE CONTROL

SYSTEM INTEGRATION:

PLC CONTROL VS. DIGITAL DRIVE CONTROL

In September 1999, NASA said the Mars Climate Orbiter

presumably burned up in the Martian atmosphere because

propulsion engineers failed to convert feet and inches into

meters and centimeters.

SYSTEM PROTECTION:

MOTOR/GENERATOR OVER VOLTAGE

MOTOR/GENERATOR OVER CURRENT

MOTOR OVER SPEED

MOTOR/GENERATOR LOAD UNBALANCE

GROUND FAULT PROTECTION

OVER TEMPERATURE PROTECTION

MECHANICAL COUPLING/GEARING FAILURE

ELECTRICAL START UP AND TESTING

FEEDBACK TOUCH TEST

ISOLATED FEEDBACK SIGNALS

ENCAPSULATED SCR CELLS

NO COMPUTER NEEDED TO TROUBLE

SHOOT DIGITAL DRIVES

OPERATIONALAMPLIFIERREGULATOR

SCRGENERATOR FIELD EXCITER

MASTERSWITCH

AC POWER 480 VAC

MECHANICAL LOAD

ROTATING MOTORFIELD EXCITER

VOLTAGE FEEDBACK

CURRENT FEEDBACK

GENERATOR FIELDOVERCURRENT RELAY

ELECTRICAL START UP AND TESTING

DIGITAL DRIVES – INTERNAL DIAGNOSTICS

MULTIPLE FEEDBACK – HIGHEST TAKEOVER

PLC VOLTAGE AND CURRENT MONITOR

ONE DIGITAL DRIVE TYPE, SOFTWARE CHANGES

OTHER CONSIDERATIONS:

DUAL GENERATOR FIELD APPLICATIONS

WIRE HARNESS TO DOORS

CIRCULATING CURRENT IN MOTORS/GENERATORS

SINGLE REGULATOR/SCR BRIDGE UNIT

MOTOR FIELD CONTROL:

ROTATING DC GENERATORS FOR MOTOR

FIELD EXCITATION REPLACED BY

DIGITAL DRIVE APPLICATION.

INCREASED PRODUCTION

DECREASE MAINTENANCE

CENTRALIZED ACCESS FOR TESTING AND

TROUBLE SHOOTING

COMPREHENSIVE SYSTEM

DOCUMENTATION AND

WORK SPACE

COMPLIANCE ENGINEERING - The CE marking (also known as CE mark) is a mandatory conformity mark on many products placed on the single market in the European Economic Area(EEA). The CE marking certifies that a product has met EU consumer safety, health or environmental requirements.

[8H39A] [8H31A]

VOLTAGE FEEDBACK TO DOM IIVOLTAGE TO TEST PANEL

CURRENT FEEDBACKAND TEST PANEL

[8H25C]

[8H23B]

(DM2A1)

(DM2A2)

DG1 DG1C1+

CCW(DG1A2)

(DM1A2)

(DM1A1)

(DG2A2)

CCW(DG2A1)

(PM1A1)

(DG1A1)

(PM1A2)

1PCA [8Q]

1DCA [8Q]

1 2 3 1 2

1 - 23 - 2 1 - 3 2 - 3 2-1 3 - 1 3 - 2 1 - 2

DUAL FIELD CONSTRUCTION

SINGLE FIELD CONSTRUCTION

1 2 3 1 2

1 - 23 - 2 1 - 3 2 - 3 2-1 3 - 1 3 - 2 1 - 2

100 VOLTS 100 AMPS

OHM’ LAW I = E / R

R = E / I

R= 1 OHM

100 VOLTS 100 AMPS

OHM’ LAW I = E / R

R = E / I

R= 1 OHM

120 VAC / 1 OHM = 120 AMPS

IMPEDANCE Z = 2 pf L

I = 120 V / 540 OHM = .222 AMP

VISIT US AT DRIVESANDCONTROLS.COM

THANK YOU FOR THIS OPPORTUNITY TO BE

HERE TODAY –

ANY QUESTIONS?

DRIVES & CONTROLS SERVICES, INC. EXCAVATOR ELECTRICAL ... · accomplished by varying dc current...

Documents

Synchronous Machine Armature Windings - NPTel

Leakage Impedance of Transformer Windings

Shunt Capacitors

Molded Case Circuit Breakers 04/15/16...Shunt Trip Combinations 1 Shunt Trip Control 1 Shunt Trip and 1 Auxiliary Switch 1 Shunt Trip and 1 Shunt Trip and 2 Voltage 1 Shunt Trip 1

ventriculoparietal shunt

Ac Machine Windings

Transposition in Transformer Windings

Ppt. on Transformer Windings (1)

ECE 4411 Complete Equivalent Circuit for the Shunt Motor R acir = resistance of the armature circuit Interpoles and Compensating Windings

Shunt Reactor

Armature Windings

Maquette1 Magnetic circuit (core) Instrument Transformer U1U1 U2U2 Secondary Windings Primary Windings

Power Losses Calculations in Windings of Gapped …oa.upm.es/37148/1/INVE_MEM_2014_197924.pdf · Power Losses Calculations in Windings of Gapped ... losses calculation in windings

feedback topologies - WordPress.com€¦ · Feedback Topologies • series-shunt feedback • series-series feedback • shunt-shunt feedback • shunt-series feedback. Mixer network

SHUNT REACTORS DESIGN DEPARTMENTntdc.gov.pk/bidding/Shunt Reactors.pdf · MVAR shunt reactor as per NTDC specification. 02 RATINGS Following are the ratings of the shunt reactor to

HYDEC 1070 aluminium windings for electro-technical ... · HYDEC 1070 aluminium windings for electro-technical applications ... windings for electro-technical applications such as

reactores shunt

Overview of the Rectangular Wire Windings AC …2019/06/25 · wire windings and the stranded windings, where the welding technic has been involved [4]. Thus, it is necessary to reasonably

Splice Shunt/Dead-end Shunt for Transmissionpreformed.com/images/pdfs/Energy/Transmission/Repair...Title Splice Shunt / Dead-end Shunt for Transmission - EN-SS-1130-1 Keywords Splice

About Armature windings