Transcript PowerPoint 프레젠테이션

INVERTER
Table of Contents
1. Loom (textile) control system
-----------------2. Loom traverse operation
-----------------3. Warper (textile) control
-----------------4. Building air-conditioning system using 485
-----------------communication
5. Trans parking system
-----------------6. Cooling tower system
-----------------7. Hoist driving system
-----------------8. Socks manufacturing system
-----------------9. Spray system for humidity control of textile
-----------------factory
10. Slitting Machine
-----------------11. Subway air-conditioning system
-----------------12. Apartment water supply system
-----------------13. Elevator driving system
-----------------14. Aeration tank motor driving
-----------------15. Compressor test system
-----------------16. Fueling pump driving system
-----------------17. Printing machine main motor system
-----------------18. Running machine driving system
-----------------19. Extruder screw driving system
-----------------20. Steel plate line speed control system -----------------21. Coiler driving system
-----------------22. Fiber coating system
-----------------23. Laboratory air-conditioning system
-----------------24. Energy saving case using inverter
------------------
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Appendix
Loom (textile) control system
1.Introduction
3.Main function
-Driving of yarn drum of loom (textile machine) should be
controlled in line with main motor. Because the conventional
system uses reduction gear, gearing ratio should be changed if
the product type is altered. Therefore, we decided to control
tension using inverter.
-Field : Textile/loom
-Type : iS5
2.System construction
-Linkage control: Speed of main motor that releases the spool
should be controlled in line with line speed of the drum.
⇒Rpm of main motor (for spool driving) is used as feedback for
main speed control.
-PID control: Feedback tension control
4.Others
Spool
3-phase
A/C
Tension sensor
M1
SV iS5
M3
M2
M4
Slave
INV
V
1
V
2
Fixed bar
P/V
V
1
5
G
Main
speed, M
Pulse/voltage
converter
Textile
manufacturer
M2
P/V
Mai
n
spe
ed,
M
Drum
Tension maintaining bar
Final
product
5
G
Master
INV
Motor speed encoder
M1
V
2
Tension sensor
P/V
Pulse/current
converter
Motor speed encoder
1/23
LG Industrial Systems
Loom traverse operation
1. Introduction
3. Main function
- When winding yarns, it is necessary to guide the yarns
with traverse.
- By traverse operation, the drum’s rpm is altered
periodically, so that the yarns do not cluster locally
(ribbon effect) or cut off.
- Field: Textile machine/loom
- Type: SV-iS5
- Traverse operation is performed using traverse function of
APP Group, which is characteristic of iS5
- Conventionally, traverse operation was performed using
inverter’s up-down operation and FDT function. However, it
required additional volume and contact points.
4. Others
Parameter
DRV-1
DRV-2
DRV-4
I/0-12
I/O-13
I/O-40
I/O-41
I/O-42
I/O-43
I/O-44
2. Process & system construction
Lint
Roving
machine
Side view
Spinning
machine
Winder
Front view
Cheese
Cheese
Functions
Acc. time
Dec. time
Freq mode
P1 define
P2 define
FM mode
FM adjust
FDT freq
FDT band
Aux mode
Drum
Drum
Guide groove where
yarns are wound
Fixed
guide
Motor Clutch
(0.4kW)
yarn
Clutch
controlle
r
Winder Inverte
control
r
ler
(15kW)
Parameters
for iS5 traverse
function
2/23
Setup
8s
12s
Keypad-1
UP
DOWN
Freqency
78%
51Hz
8Hz
FDT-5
Parameters
for performing
traverse operation
through external
sequence
Parameter Functions
DRV-1
Acc. time
DRV-2
Dec. time
DRV-4
Freq mode
I/O-40
FM mode
I/O-41
FM adjust
APP-01
App mode
APP-02
Trv. Amp
APP-03
Trv. Scr
APP-04
Trv Acc Time
APP-05
Trv Dec Time
APP-06
Trv Off Hi
APP-07
Trv Off Lo
Setup
8s
12s
Keypad-1
Freqency
78%
Traverse
7.8%
0%
1.1s
1.6s
0%
0%
LG Industrial Systems
Warper (textile) control
1.Introduction
3.Main function
- Winds several strands of yarns in a plane. The inverter
controls winding power and tension power.
- Field: Textile/warper
- Type: SV150iV-4
- Motor spec: 15㎾,440V.60㎐
-Winder: Winds aligned yarns
-Bridle Roll: Applies tension to yarns
-Comb-shaped structure: Aligns yarns uniformly
4.Others
-In the system construction diagram, the threads consist of
more than hundreds (300~600) of yarns. Yarns released from
the threads are aligned by the comb-shaped structure and
tension is applied to them while they pass the bridle roll.
Then, they are wound by the winder after passing the second
comb-shaped structure .
2.System construction
Yarn spacing maintaining device
Winder
5.Operation method
-The bridle roll controls back tension with vector inverter.
The winder is controlled by “PI” using iS3.
Threads
Bridle roll for maintaining tension
3/23
LG Industrial Systems
Building air-conditioning system using 485 communication
1. Introduction
4. System construction
- Introduces inverter using ESCO system in order to save
energy consumption.
- Field: Building air-conditioning/communication
- Type: SV-iS5, iH, RS485 option card
10EA
7EA
13EA
11EA
2. Process construction
Flow
sensor
INV
N.C
RF
Speed control
using RS485
communication
RA
Communication between
inverters and various
thermometers are
controlled by the master
controller.
Tempera
ture
sensor
SF
CC
Signal conversion is performed by
one “System Base” 485 converter and
three “RealSYS” 485converters.
INV
Speed control
using RS485
5. Others
Control Room
- All 49 inverters are controlled by main control PC in
Control Room using RS485 communication.
- The inverters are allotted in groups considering
communication overload and distance.
- Because the user wants constant setup frequency
regardless of power on/off,nonvolatile frequency in
keypad command region, instead of common region
frequency.
3. Main function
- The inverter controls air conditioning according to
temperature and number of customers, by the command of
Control Room.
- The supply is turned on, and the flow sensor detects air
flow.
4/23
LG Industrial Systems
Trans parking system
1. Introduction
3. Main function
- If the car enters the parking area, it is lifted and placed
to its parking position. Because a lot of cars can be
parked in small area, this system is suitable for
officetels or toll parking lots.
- There are upper lifting (end lifting & intermediate lifting)
and direct lifting modes according to the position of
entrance.
- Field: Parking Building
- Type : iS5
- Brake opening signal should be output after identifying
inverter output. The brake opening signal is generated
after identifying operation (or frequency detection)
signal in order to prevent falling of cars during inverter
breakdown.
ON
ON
Brake opening
ON
ON
Fast
Lifting
2. Process construction
Slow
Descendi
ng
Operation
RX-ON
ON
FX
RUN
Slow
Slow
Slow
Fast
Passage
- “Dwell” and “DC braking” during startup, and “DC braking”
during stoppage help braking.
Inv1
Ground
level
B1
Rotation
M4
B3
M5
PLC
M1
M3
B2
Inv2
4. Others
M2
- Sufficient flux buildup time is required, because the motor
may not be driven if the lifting acceleration time is too
fast.
- Stall prevention function should not be used when lifting
cars. If the stall prevention is activated, the car can
fall to the ground accidentally.
M1 : Main lift
M2 : Sub-lift
M3,4,5 : For sliding
5/23
LG Industrial Systems
Cooling tower system
1.Introduction
3.System construction
-Cooling tower is used to cool down circulation water of
chemical process. Because the cooling method is air-cooling,
fan is required. The fan is driven by motor.
-Conventionally, cooling of circulation water was done in On/OFF
mode. However, we introduced speed control by inverter for
precise control and energy saving.
-Field: Fan/cooling tower
-Type: iH
Cooling tower
Fan
Motor
Cooling water
2.Process construction
Temperature
sensing
Temperature sensor
INV
PID controller
PID
V!
4.Main function
<PID control>
Temperature sensor
-Frequency
jump: Generally, the cooling tower has two or
three resonance points within 0~60㎐. Therefore, operation
may happen at resonance points if inverter is used for speed
control. In this case, shafts that link motor bearing or
motor with fan may be damaged.
⇒When applying frequency jump function, precise resonance
points should be identified. For this purpose, speed is
gradually altered during installation.
Display
V!
variable
resistor
<Manual control>
6/23
LG Industrial Systems
Hoist driving system
1. Introduction
3. Main function
- A system for driving hoist, which is used for repairing
lighting towers of baseball park. No precise control is
required, but it is required to improve riding comfort.
- Field: Hoist/lift
- Type: inverter(SV-IS5)
2. Process construction
1) Speed control by voltage
2) Inverter run output is used for brake signal
3) Lifting/descent signal is controlled by the rider with
lever.
4. Others
Lighting tower
1) Dynamic Braking resistor is used to prevent release
during deceleration.
2) Acceleration/deceleration time is determined by stop
signal and stop position from test operation. DC brake
is used to improve riding comfort during brake.
Rack & pinion
3) Brake opening signal should be generated by accepting
inverter run signal because signal delay or signal error
may happen, and it is recommended to equip additional
protection equipments such as governor in preparation
for inverter error.
※ Brake operation diagram
~
Brake
AXA, AXC
Run signals
7/23
M/C
LG Industrial Systems
Socks manufacturing system
1. Introduction
3. Main function
- LG inverter used for main driving source of socks
manufacturing machine
- Field: Socks manufacturing machine
- Type: Inverter (SV-IG5)
1) Inverter
- Forward driving startup (FX-CM)
- JOG function
- Speed control by keypad
- Torque increase by manual torque boost function
2. System construction
Spool
4. Others
- Production speed can be regulated by controlling motor
speed with inverter
Socks
manufacturing
- Because JOG operation is possible, tangled yarns can be
disentangled using JOG frequency.
- Noise is reduced by inverter operation.
- Machine handling becomes easy because machine operating
Driving
force
transfer
Inverter
Final
product
(socks)
part and inverter can be connected easily.
Motor
8/23
LG Industrial Systems
Spray system for humidity control of textile factory
1. Introduction
3. Main function
- Humidity control of textile factory is important with
regard to product quality.
- The humidity control is performed by spraying moisture in
room between air path. Generally, this spraying is
controlled by valve, but if inverter is used, there will
be advantage in control efficiency and energy saving.
- Field: Pump
- Type: SV-iH
- Because the installed valve control system is replaced by
motor speed control system, all that is required is
matching valve control amount and speed control output. No
additional function is required.
2. Process construction
4. Others
Factory room
- If there arises current non-equilibrium at input, this is
due to factory electricity supply. It can be solved by
adding reactors.
sens
or
Humidity
feedback
Speed
control
Addition
al
controll
er
9/23
LG Industrial Systems
Slitting Machine
1. Introduction
3. Main function
- Slits material of sanitary napkin for women (width: 1 m)
in 8 strands and rewinds it.
- Field: Linked controller/unwinder, slitting, rewinder,
pinch
- Type
Unwinder: 037iV-2 1EA
Slitting bridle: 037iV-2 1EA
Rewinder: 022iV-2 4EA
Pinch machine: 037iS3-2 1EA
- Maximum line speed is 200m/m, and 10V main speed control is input.
- Unwinder: Because minimum diameter of roll is 100  and the gearing
ratio is 30:46,40:132,30:24, i.e. 4.048:1, the maximum motor speed
is (200/0.1π)(132/40)(46/30)(24/30)=2577rpm. Also, because maximum
diameter of the initial material is 1500 , motor speed at the
maximum line speed becomes (200/1.5π)(132/4046/30)(24/30)=172rpm.
That is, 172 ~ 2577 rpm should be maintained at the maximum line
speed.
2. Process
Slitting
machine
Rewinder
Looper
- Slitting bridle: Because minimum diameter of roll is 114 and the
gearing ratio is 24:44,21:44, i.e. 3.841:1, the maximum motor speed
becomes (200/0.1π)(44/21)(44/24)=2145 rpm.
Unwinder
Pneumatic
- Rewinder : Because minimum diameter of roll is 190  and the
gearing ratio is 30:46,1:5, i.e. 7.667:1, the maximum motor speed
becomes (200/0.1π)(46/30)(5/1)=2569rpm. And, at the maximum
diameter of 1200, the motor speed becomes
(200/1.2π)(46/30)(5/1)=407rpm.
- The rewinder uses torque minor loop mode in iV winder version.
V2
iV022-2
V1
Position Sensor
V2
V2
- The unwinder uses iV winder version with variable external PI
speed control. The looper position data is linked with front
slitting bridle operation.
iV037-2
iV037-2
V1
V1
Main Speed Control(0~10V)
Main Controller
10/23
LG Industrial Systems
Subway air-conditioning system
1. Introduction
3. Main function
1) inverter
- LG inverter used for air conditioning of subway station
- Field: Air conditioner
- Type: Inverter (SV-iS5)
- Forward driving startup (FX-CM)
- Speed control by variable resistor (V1)
- Communication control selection using PLC
- One-touch control using PMU
2. System construction
- Remotely/locally controllable
4. Others
-에너지 절감
Air in
Air out
-설비 유지 보수 용이
-운전소음 감소
- Communication control using PLC and PMU is possible.
-물탱크 제거에 따른 설치비용 감소
- System control can be performed in station office
because remote/local transition is possible.
Train
5. 기타
- Energy consumption is reduced because air supply/return
can be controlled by season.
In
ve인
rt버
er
- Installation, maintenance and repair are simple.
터
Exhaust
blower
Supply
blower
11/23
LG Industrial Systems
Apartment water supply system
1. Introduction
3. Main function
1) Inverter
- LG inverter used for supplying water to apartment
households
- Field: Water supply pump for high-rise apartment
- Type: Inverter(SV-iS5)
- Forward driving startup (FX-CM)
- Speed control by variable resistor(V1)
- Control by communication
2. Process construction
2) PLC
- Process PID control
Apartment
(12~18F)
4. Others
6 buildings /
860 households
- PLC (Master-k80s) was used as main controller. Speed of
4 inverters was controlled by PID control.
- Because the water volume is controlled in real time
using inverter, the conventional water tank becomes
unnecessary.
Pressure
gauge
PLC
인
버
터
1
인
Inv2
인
버
터
3
인
Inv4
Inv1
Pump
1
Underground
water tank
Pump
2
Pump
3
Pump
4
Inv3
- Motor noise is reduced remarkably because motor speed is
controlled by inverter.
버
터
2
- Remote water supply system control is possible using PMU
(optional).
버
터
4
12/23
LG Industrial Systems
Elevator driving system
1. Introduction
3. Main function
1) Height detection by inverter
- LG vector inverter used for elevator control
- Field: Elevator
- Type: Inverter(SV-IV5L)
2) Acquires optimum speed pattern by calculating remaining
distance
3) Position signal is transferred to main controller
continuosly
4) Driving signal of electronic brake is directly
controlled by inverter
2. Process construction
Electronic
brake
4. Others
Motor
Inverter
1) iV5-L or iV5 can be selected depending on requirements
of main controller.
Encoder
2) Because the inverter should send and receive specific
signal with main controller, matching with the main
controller is important.(iV5L Version)
3) Motor characteristic value is tuned without really
driving the motor, by stop-type auto-tuning.
Counter
Weight
3Φ AC
Car
Sensor
13/23
LG Industrial Systems
Aeration tank motor driving
1. Introduction
3.Main function
-DO(dissolved Oxigen) of water is controlled for rapid reaction
of pollutants and chemicals.
-Inverter is used for speed control.
-Inverter is used for precise control and energy saving.
-Field: Blower/aeration tank
-Type: SV075iH-4(75㎾)
-Motor spec: 75㎾, 2-pole
-PID control is used to precisely control water concentration.
4.Others
2.System construction
-Although the blower is energy-saving load, energy consumption is
not saved if aeration tank is the main load.
⇒Pressure is applied to the blower of aeration tank because it
is positioned in water. Therefore, a large torque is required
to overcome the pressure and expel air bubble.
Here, the water pressure acts as damper.
Blower
Damper control and aeration tank characteristics
Air bubble
Inverter
Water
concentration
detection
PID
control
Power
(㎾)
General energy-saving
characteristic curve
Load (blow or flow volume)
<Load amount vs. Power consumption>
14/23
LG Industrial Systems
Compressor test system
1. Introduction
3. Main function
1) Inverter
- LG inverter used for compressor test
- Field: Screw-type compressor
- Type: Inverter(SV-IH)
- Forward driving startup (FX-CM)
- Speed control by keypad
- Overload trip
- Overheat prevention
2. System construction
4. Others
Inverter
Screw-type
compressor
- Because frequency can be easily altered with inverter,
test can be carried out for any country.
- Because the inverter provides data such as power
consumption, output voltage and output current, additional
equipment is unnecessary.
Connected for
compressor test
Breaker
3-phase
output
line
3Φ AC
15/23
LG Industrial Systems
Fueling pump driving system
1. Introduction
3.Main function
-Fueling pump for supplying oil to airplane. Oil pressure is
maintained by inverter depending on load change.
-Field: Pump
-Type: SV-iH
-Except for ordinary operation (60㎐) to maintain constant
pressure, additional load (fueling amount) is controlled by
inverter in order -PID control
: 4~20㎃ of pressure signal is transferred to DCS,
and DCS sends PID output for inverter control.
2.System construction
4.Others
DCS Control System
4~20mA
input
4~20mA
P
-Because the motor was for medium-voltage (6,600V), UP/DOWN
transformer was used to control low voltage inverter (440V).
⇒Inverter input was decreased from 6,600V to 440V. Then, inverter
output was increased from 440V to 6,600V because the motor was
for 3300V.
⇒Heat resistance is important when selecting the UP/DOWUN
transformer, because heat is generated.
Pressure signal
transfer
P
P
P
16/23
LG Industrial Systems
Printing machine main motor driving
1. Introduction
3.Main function
-Prints two colors after unwinding paper roll, and then rewinds
it.
-Field: Individual machine (printing machine)
-Inverter: SV037iV5-4 (3.7㎾)
-Motor spec: 3.7㎾ (Encoder equipped to general motor:
Metronics 1,000Pulse)
-ASR (Automatic speed regulator) P,I gain control
⇒P gain: 40%
I gain: 400㎳
2.System construction
4.Others
Tension
controller
2-Color
printing
-The rpm variation should be within 1rpm for printing accuracy.
⇒If variation becomes large, printing position may not coincide
in 1-color printing and 2-color printing.
Connected
by gear
1-Color
printing
0~10V
Variable
resistor
LG
vector
inverter
E Motor
Encoder
feedback
17/23
LG Industrial Systems
Running machine driving system
1. Introduction
3. Main function
- LG inverter used for controller of running machine
driving motor
- Field: Running machine
- Type: Inverter (SV-IC5)
1) Inverter
- Forward driving startup (FX-CM)
- Speed change by Up/Down operation
- Sensorless vector operation
2. Process construction
- Motor overheat prevention
- Overload trip
- Control by communication
4. Others
Motor
1Φ AC
Inverter
- Strong torque characteristics at low speed by sensorless
vector
- Smooth acceleration/deceleration and reduced noise
- Product stability increased by motor overheat prevention
and inverter overload prevention
- Communication with running machine specific controller is
possible
18/23
LG Industrial Systems
Extruder screw driving system
1. Introduction
3. Main function
1) Inverter
- LG inverter used for extruder screw driving
- Field: Extruder screw
- Type: Inverter (SV-IH)
- Forward driving startup (FX-CM)
- Speed control by variable resistor (V1)
- Motor overheat prevention
- Overload trip
2. Process construction
Raw
material
4. Others
- Productivity can be increased because extruder screw
Inverter
speed can be easily controlled by variable resistor (V1).
- The screw speed can be controlled in real time depending
on the temperature of extruder cylinder.
- If the motor is overloaded or overheated because of poor
extrusion, the self-protection function protects the
motor and inverter without additional equipment.
Screw
- Because the motor speed is controlled by frequency, the
wider and more precise control is possible compared with
conventional step control.
- Motor noise is reduced.
Motor
19/23
LG Industrial Systems
Steel plate line speed control system
1. Introduction
3. Main function
- Forward driving startup (FX-CM)
- LG vector inverter used in steel plate production line
- Field: Individual machine (roller)
- Type: SV-iV
- Up/Down operation
- Jog frequency operation
- Use DB resistor
- Motor overheat prevention
2. System construction
- Overload trip
3ΦAC
Steel
plate drum
Leveler
LG
vector
invert
er
4. Others
Cutting roll
Product
(steel
plate)
- Leveler’s main role is to remove residual stress.
- Product size can be controlled precisely by leveler line
speed control using inverter.
- UP-Down operation and Jog function for ease operation.
- Vector was used to precisely control line speed in order
to obtain precise dimension of final product.
- AC reactance was applied at input line for power-factor
improvement and input circuit protection.
Cutter
Steel
plate
20/23
LG Industrial Systems
Coiler driving system
1. Introduction
3.Main function
-The conventional winding motor requires large current for
startup and is disadvantageous in productivity.
-Inverter is used to reduce startup current and improve
productivity.
-Load: Coiler
-Inverter: SV132iH-4 (132㎾)
-Motor:110㎾ (Modified winding motor)
-During startup: Acceleration time should be selected so that
the normal speed can be attained within 1min for general 150%
load.
-During stoppage: Because the rotational inertia is large, free
run stoppage and machine brake are used.
2.System construction
4.Others
Drum(24inch*6,16inch*9,12inch*1)
-Because winding motor is used directly to inverter, internal
resistance of the motor was removed.
⇒During wire connection, overheat may damage the wire.
Capstan
Decelerator
Twister
Drum
-Twister: Twists 16 strands of wire released from each drum.
-Capstan: Applies tension to maintain the twisted state.
21/23
LG Industrial Systems