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1. LS VFDLS VFD
1 EME Business Div.EME Business Div.
LS Variable Frequency DriveLS Variable Frequency Drive
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2. LS VFDLS VFD
2 EME Business Div.EME Business Div.
Application
- Textile (Loom)
- Textile (Warper)
- Textile (Traverse)
- Slitting machine
- Socks making machine
- Steel plate line speed control system
- Coiler driving system
- Extruder (Screw type)
- Running machine
- Industrial washing machine
- Printing machine
- Hoist (Lift)
- Elevator
- AHU control
- Cooling Tower
- Aeration tank motor driving system
- Humidity control – Textile factory
- Apartment water supply system
- Fuel pump driving system
ContentsContentsContents
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3. LS VFDLS VFD
3 EME Business Div.EME Business Div.
Textile(Loom)
1. Introduction
- Driving of yarn drum of loom 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/iS7
3. Main function
- 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. System configuration
M2 M4
M3M1
Drum
Encoder
Final
Product Textile
Manufacturer
Tension
maintaining bar
Spool
Tension sensor
Fixed bar
Main
Motor
Master
INV
Slave
INV
V
1
5
G
5
G
V
1
V
2
V
2
M1
M2
Pulse/voltage
converter
3-phase
iS5/
iS7
Main
Motor
P/V
P/C Pulse/current
converter
P/C
Tension sensor
Encoder
2. Process configuration
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4. LS VFDLS VFD
4 EME Business Div.EME Business Div.
Winding
Threads
Textile(Warper)
1. Introduction
2. Process configuration
- Winds several strands of yarns in a plane.
Inverter controls winding and tension power.
- Field: Textile/Warper
- Type: SV150iS7-4/SV150iS5-4
- Motor spec: 15㎾,440V.60㎐
Bridle roll for maintaining tension
Yarn spacing maintaining device
3. Main function
-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 .
- The bridle roll controls back tension with
vector inverter. The winder is controlled
by “PI” using iS7/iS5.
5. Operation Method
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5. LS VFDLS VFD
5 EME Business Div.EME Business Div.
yarn
Drum
Cheese
Guide groove
Where yarns are
wound
Fixed
Guide
iS5
(15kW)
Front ViewSide View
Lint
Roving
Machine
Spinning
Machine
Winder
Winder
controller
Clutch
Clutch
controller
Para. Description Set Value
DRV-1 Acc. 8sec.
DRV-2 Dcc. 12sec.
DRV-4 Frequency mode Keypad-1
I/0-12 P1 UP
I/O-13 P2 DOWN
I/O-40 FM Output Freqency
I/O-41 FM Output Gain 78%
I/O-42 Detect Frequency 51Hz
I/O-43 D. Frequency Band 8Hz
I/O-44 Multi function FDT-5
Para. Description Set Value
DRV-1 Acc. 8sec.
DRV-2 Dcc. 12sec.
DRV-4 Frequency mode Keypad-1
I/O-40 FM Output Freqency
I/O-41 FM Output Gain 78%
APP-01 Mode selection Traverse
APP-02 Traverse Band 7.8%
APP-03 Scramble size 0%
APP-04 Traverse Acc 1.1sec.
APP-05 Traverse Dcc 1.6sec.
APP-06 Offset(Hi) range 0%
APP-07 Offset(Lo) range 0%
Parameters
for iS5 traverse
Function
Parameters
for performing
traverse operation
through external
sequence
3. Main function
4. Others
- 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.
- 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/iS7
1. Introduction
2. Process & system configuration
Textile(Traverse)
Drum
Cheese
Motor
0.4kW
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6. LS VFDLS VFD
6 EME Business Div.EME Business Div.
Looper
Position
Sensor 037iS7-2
V1
V2
Pneumatic
V1
V2
V1
V2
Main controller
Main speed control (0~10V)
UnwinderSlitting
machine
Rewinder
- 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: 037iS7-2 1EA
Slitting bridle: 037iS7-2 1EA
Rewinder: 022iS7-2 4EA
Pinch machine: 037iS5-2 1EA
2. Process & system configuration
1. Introduction 3. Main function
- Maximum line speed is 200m/m, and 10V main speed control
is input.
- Unwinder: Because minimum diameter of roll is 100Φ 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 1500Φ,
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.
- Slitting bridle: Because minimum diameter of roll is 114Φ 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.
- Rewinder : Because minimum diameter of roll is 190Φ 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 1200Φ, the motor speed becomes
(200/1.2π)(46/30)(5/1)=407rpm.
- The rewinder uses torque minor loop mode in iV5 winder
version.
- The unwinder uses iV5 winder version with variable external
PI speed control. The Looper position data is linked with front
slitting bridle operation.
Slitting machine
037iS7-2022iS7-2
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7. LS VFDLS VFD
7 EME Business Div.EME Business Div.
Spool
Socks
manufacturing
Driving
Force
Transfer
Motor
Socks
iG5A
Socks making machine
2. Process & system configuration
1. Introduction
- LS inverter used for main driving source
of socks manufacturing machine
- Field: Socks manufacturing machine
- Type: Inverter (SV-iG5A)
3. Major function
4. Others
Inverter
• Forward driving startup (FX-CM)
• JOG function
• Speed control by keypad
• Torque increase by manual torque boost function
- Production speed can be regulated by
controlling motor speed with inverter
- 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 part and inverter can be
connected easily.
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8. LS VFDLS VFD
8 EME Business Div.EME Business Div.
iS7
Steel plate
Drum
3Φ
Leveler
Cutting Roll
Steel plate
Cutter
Steel plate line speed control system
2. Process & system configuration
1. Introduction 3. Major function
4. Others
Steel plate
- LS inverter used in steel plate production line
- Field: Individual machine (roller)
- Type: SV-iS7
- 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.
- Forward driving startup (FX-CM)
- Up/Down operation
- Jog frequency operation
- Use DB resistor
- Motor overheat prevention
- Overload trip
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9. LS VFDLS VFD
9 EME Business Div.EME Business Div.
Drum(24inch*6,16inch*9,12inch*1)
Drum
Twist
Capstan
2. Process configuration
1. Introduction 3. Major function
4. Others
Coiler driving system
- 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: SV1320iP5A-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.
• Twister: Twists 16 strands of wire released from each drum.
• Capstan: Applies tension to maintain the twisted state.
- Because winding motor is used directly to inverter,
internal resistance of the motor was removed.
⇒ During wire connection, overheat may damage
the wire.
Decelerator
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10. LS VFDLS VFD
10 EME Business Div.EME Business Div.
product
M
iP5A
Raw
materials
Screw
Extruder(Screw type)
2. Process & system configuration
1. Introduction
- LS inverter used for extruder screw driving
- Field: Extruder screw
- Type: Inverter (SV-iP5A)
3. Major function
4. Others
Inverter
• Forward driving startup (FX-CM)
• Speed control by variable resistor (V1)
• Motor overheat prevention
• Overload trip
- Productivity can be increased because extruder screw
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.
- 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.
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11. LS VFDLS VFD
11 EME Business Div.EME Business Div.
Motor SV-iC5
1Φ
Running machine (Treadmill)
2. Process & system configuration
1. Introduction 3. Major function
4. Others
- LS inverter used for controller of running
machine driving motor
- Field: Running machine
- Type: Inverter (SV-iC5)
Inverter
• Forward driving startup (FX-CM)
• Speed change by Up/Down operation
• Sensorless vector operation
• Motor overheat prevention
• Overload trip
• Control by communication
- 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
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