Xem thêm các sản phẩm biến tần LS tại http://hungphu.com.vn/bien-tan-ls.html Biến tần - Biến tần LS và các ứng dụng (P.2)

1. LS VFDLS VFD
12 EME Business Div.EME Business Div.
- Industrial washing machine : Hotel, Hospital
Factory, Laboratory, Chemical, etc
- Field : Machinery(Washing Machine)
- Inverter : SV-iG5A(1phase : 1.5,2.2kW)
SV-iS5/iS7(3phase : 5.5,7.5kW)
- Motor : 1Hp ~ 10Hp
- 16 level multi step operation
- Acc/dec. time auto transfer feature – only for LGIS
- Speed commend : Multi step operation or RS485
: Low speed(washing), high speed(dehydration)
- Acc/dec. time auto transfer : two deferent acc/dec.
time ⇒ low speed and high speed
- Overheat level setting feature and overheat trip
: When reach to the overheat level, according to the
set value
⇒ Decel/stop, Free Run/stop,
or lower the carrier frequency to prevent the trip
DRUM
INV
Industrial washing machine
IM
2. Process & system configuration
1. Introduction 3. Major function
4. Others
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Công ty TNHH Kỹ Thuật Tự Động Hưng Phú – HƯNG PHÚ AUTOMATION
Địa chỉ: 28 Trần Tướng Công, Phường 10, Quận 5, Tp.HCM
Điện thọai: 08. 39507410 - 38597317
Hotline: 0942 982 231
Fax: 08. 38559431 - Email: webmaster@hungphu.com.vn
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2. LS VFDLS VFD
13 EME Business Div.EME Business Div.
EiS7
Encoder
Gear
Tension
Controller
0~10V
Volume
resistor
2nd
color
printing
1st color
printing
2. Process & system configuration
1. Introduction
3. Major function
4. Others
- Prints two colors after unwinding paper roll, and then rewinds it.
- Field: Individual machine (printing machine)
- Inverter: SV037iS7-4 (3.7㎾)
- Motor spec: 3.7㎾ (Encoder equipped to general motor : 1,000Pulse)
- 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.
- ASR (Automatic speed regulator) P,I gain control
⇒ P gain : 40%
I gain : 400㎳
Printing machine
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3. LS VFDLS VFD
14 EME Business Div.EME Business Div.
Rack & pinion
Lighting
tower
~
AXA, AXC
Run signal
※ Braking operation system
- 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-iS7)
2. Process configuration
1. Introduction
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.
3. Major function
M/C
Brake
4. Others
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.
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.
Hoist(Lift)
iS7
iS7
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4. LS VFDLS VFD
15 EME Business Div.EME Business Div.
iV5 M
Electronic Brake
encoder
Counter
Weight
Car
Sensor
Elevator
2. Process & system configuration
1. Introduction
- LS vector inverter used for high speed elevator
control with its special feature
- Field: Elevator
- Type: Inverter(SV-iV5L)
3. Major function
4. Others
1) Height detection by inverter
2) Acquires optimum speed pattern by calculating
remaining distance
3) Position signal is transferred to main controller
continuously
4) Driving signal of electronic brake is directly
controlled by inverter
1) iV5-L or iV5 can be selected depending on
requirements of main controller.
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.
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5. LS VFDLS VFD
16 EME Business Div.EME Business Div.
- Damper control → Inverter control
▶ Energy saving / Automatic control
- Facility : AHU(Air handling unit)
- Model: SV-iS7/iS5, iG5A, iP5A
3. Major function
- Create the optimum air control through VFD
- Automatically control the air flow
- Supply is on and return is automatically on or off
depending on the flow of air
4. Control system
10EA 7EA
13EA 11EA
System convert from
RS232 to RS485
using the converter
5. Others
- Total VFD no. : 49
- Control 49 VFD through RS485 communication
from the main control PC in control room
- VFD automatically control the air flow according
to the speed commend from control room
AHU control
SF
RF
INV
Speed commend(RS485)
RA
Control
Room
Temp.
SENSOR
Flow
Sensor
INV Speed
commend(RS485)
1. Introduction
2. Process & system configuration
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6. LS VFDLS VFD
17 EME Business Div.EME Business Div.
PID
Temperature
Sensor
V1
<PID Control>
V1 Display
Variable
Resistor
Cooling water
Cooling Tower
FAN
Cooling Tower
2. Process configuration
1. Introduction
- 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: iP5A
Temperature
Sensor
Temperature
Sensor
3. System configuration
4. Main function
PID Controller
- 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 checked in installation.
M
iP5A
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7. LS VFDLS VFD
18 EME Business Div.EME Business Div.
Power
(㎾)
Aeration tank motor driving
1. Introduction
2. Process & system configuration
M
iP5A
PID
Control
Air bubble
Water
Concentration
detection
Blower
3. Major function
4. Others
- DO(dissolved Oxygen) 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: SV750iP5A-4(75㎾)
- Motor spec: 75㎾, 2-pole
- PID control is used to precisely control
water concentration.
- Even the blower is energy-saving load, energy
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.
< Load amount vs. Power consumption >
Load(blow or flow volume)
General energy saving
characteristic curve
Damper control and aeration tank
characteristic curve
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8. LS VFDLS VFD
19 EME Business Div.EME Business Div.
Factory
Room
Humidity
feedback
Sensor
Additional
Sensor
Speed
commend
Humidity control – Textile factory
2. Process & system configuration
1. Introduction
3. Major function
4. Others
- 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-iP5A
- If there arises current non-equilibrium at input,
this is due to factory electricity supply. It can be
solved by adding reactors.
- 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.
iP5A
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9. LS VFDLS VFD
20 EME Business Div.EME Business Div.
Apartment
(12~18F)
6 buildings / 860
households
Pressure gauge
P1
Underground
water tank
P2 P3 P4
PLC
IP5A
2. Process & system configuration
1. Introduction 3. Major function
4. Others
Apartment water supply system
- Water supplying to apartment households
- Field: Water supply pump for high-rise apartment
- Type: Inverter(SV-iP5A)
1) Inverter
- Forward driving startup (FX-CM)
- Speed control by variable resistor(V1)
- Control by communication
2) PLC
- Process PID control
- 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.
- Motor noise is reduced remarkably because motor
speed is controlled by inverter.
- Remote water supply system control is possible
using PMU (optional).
IP5A
IP5A
IP5A
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10. LS VFDLS VFD
21 EME Business Div.EME Business Div.
P
P
P
P
Pressure signal
Transfer
4~20mA
INPUT
4~20mA
DCS Control System
Fuel pump driving system
- Fueling pump for supplying oil to airplane.
Oil pressure is maintained by inverter depending
on load change.
- Field: Pump
- Type: SV-iP5A
- To maintain constant pressure, 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.
- 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 6600V.
⇒ Heat resistance is important when selecting the
UP/DOWUN transformer, because heat is generated.
2. Process & system configuration
1. Introduction 3. Major function
4. Others
IP5A IP5A IP5A
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