speed control of induction motor using plc and vfd
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Transcript of speed control of induction motor using plc and vfd
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“PLC BASED SPEED CONTROL OF INDUCTION MOTOR”
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COMPONENT OF SPEED CONTROL OF IM BY PLC
Miniature Circuit Breaker ( MCB ). Relay ( R ). Bus Bar ( BB ). Variable Frequency Drive ( VFD ). Switched Mode Power Supply ( SMPS ). Programmable Logic Controller (PLC). Induction Motor ( IM ).
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VARIABLE FREQUENCY DRIVE ( VFD )
BLOCK DIAGRAM OF VFD RATING OF VFD
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OPERATION OF VARIABLE FREQUENCY DRIVE
WORKING Ns = 120 (f/p) Rectifier Circuit. DC Link. Inverter Circuit. Control Circuit.
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SWITCHED MODE POWER SUPPLY ( SMPS )
INPUT Voltage = 100-240 AC Frequency = 50-60 Hz Current = 0.6-1.5 Amp Operational Voltage 85-264 /90-350 AC OUTPUT Voltage = 24 DC Current = 5Amp
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SWITCHED MODE POWER SUPPLY ( SMPS )
Definition Advantage Disadvantage Application
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HISTORY OF PLC The Hydromantic Division of the General Motors Corporation Specified the design criteria for the first programmable controller in 1968. Their primary goal was to eliminate the high costs
associated with inflexible, relay-controlled systems.
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PROGRAMMABLE LOGIC CONTROLLER (PLC)
PLC is programmed interface between input sensors &output devices.
The PLC is an assembly of solid state digital logic elements design to make logical decisions and provide outputs.
PLC
INPUTS
LAMPCONTACTOR
PUSHBUTTONS
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TYPES OF PLC Compact PLC – inbuilt power supply, processor, i/o’s Modular PLC- separate power supply, processor, i/o’s
From Size Small-64 I/O’S Medium - 1024 Large - 4096
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HARDWARE PART OF PLC
Central Processing Unit Input Modules Output Modules Power Supply Bus system Rack(Rail)
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COMPONENTS OF PLC
PROCESSOR
POWERSUPPLY
OUTPUTMODULE
PROGRAMMING DEVICE
From SENSORS
Pushbuttons,contactors,
Limit switches,etc.
Solenoids,Contactors,
alarms
INPUTMODULE
TO OUTPUTS
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MANUFACTURES OF PLC Allen Bradley Siemens Mitsubishi Hitachi Delta
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ALLEN BRADLEY PLC
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PROGRAMMING LANGUAGES OF PLC Ladder Logic ( LAD/LD ) Structured Text ( ST) Instruction List ( IL ) Sequential Function Chart ( SFC ) Function Block Diagram ( FBD )
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O:0/7
PLC SIGNAL FLOW
O:0/7
O:1/5
Output Devices
Output ModulesProcessor MemoryInput Module
Input DevicesLadder Program
O:0/7
O:1/5
I:0/6
I:1/4
O:1/51/5
I:0/6 SENSORS O:0/7
6I:1/4
I:0/6
I:1/4
Data InputImage Table
OutputImage Table
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SMPS
R1
R2
R3
R4
VFD
MCB2MCB1
PLC
1PHASE 230 V
3 PHASE 415 V
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THANKING YOU