Variable Speed Drive

Di area Finish Mill Tuban 1 dan 2
Seksi PLIFM 1-2

Pengertian Umum
Variable Speed Drive/ inverter / Variable frequency
Drive merupakan sebuah alat pengatur kecepatan
motor dengan mengubah nilai frekuensi dan tegangan
yang masuk ke motor.
Pengaturan nilai frekuensi dan tegangan ini

dimaksudkan untuk mendapatkan kecepatan putaran
dan torsi motor yang diinginkan atau sesuai dengan
kebutuhan.
Prinsip Dasar
Mengubah tegangan input AC menjadi tegangan DC
melalui penyearah atau rectifier. Setelah tegangan
diubah menjadi DC maka diperlukan perbaikan kualitas
tegangan DC dengan menggunakan kapasitor sebagai
perata tegangan. Kemudian tegangan DC diubah
menjadi tegangan AC kembali oleh inverter dengan
tekhnik PWM ( Pulse Width Modulation ). Dengan
tekhnik ini didapatkan amplitudo dan frekuensi
keluaran yang diinginkan. Selain itu PWM
menghasilkan gelombang sinusoidal dengan harmonisa
yang kecil.
Keuntungan
 Mudah melakukan pengaturan kecepatan dan torsi.
 Akselerasi dan deselerasi mudah diatur.
 Mempermudah proses monitoring dan pengecekan.
 Dilengkapi sistem proteksi motor yang baik.
 Mengurangi arus starting motor.
 Penghematan energi listrik.
 Memperhalus start awal.
 dll.....
Penggunaan di Finish Mill
 Separator Fan
 BC3 ( Belt Conveyor Feed Mill )
 Rotary Feeder Flyash
Weigh Feeder
 FN10, FN11 dan FN8 di area Verical Mill
 dll.....
Rangkaian dasar inverter
Bagian converter dan DC Link
Bagian Inverter
IGBT
When a positive voltage
(typically +15 VDC) is applied to the gate
the IGBT will turn on.
This is similar to closing a switch.
Current will flow between
the collector and emitter. An IGBT is
turned off by removing the
positive voltage from the gate. During the
off state the IGBT
gate voltage is normally held at a small
negative voltage (-15
VDC) to prevent the device from turning
on.
Karakteristik IGBT ( Insulated Gate Bipolar Transistor ) :

• High switching speed
• Switch turn on 400 nanosecond.
• Switch turn off 500 nanosecond.
Switching devices
Gelombang output
Sekilas ACS 800
Terminal blocks of the RMIO board:
Control Panel Connector
X21 Analog Inputs Option slot 1

and outputs
(RAIO option
connected)
Option slot 2
X22 Digital Inputs
(RDIO option
connected)
X23 Voltage reference +24V Option slot 3

X24 Relay Output 1 (RDCO option
connected)
X25 Relay Output 2
X26 Relay Output 3
U1 V1 W1 U2 V2 W 2
(Pover (Motor
Supply) Connection)
Note! This connection is example
only.
Made according to a Factory Macro
Macro can be selected by parameter
99.02 Analogue input configuration:
Voltage Reference AI1: Voltage input –10 - +10V
(0-10V) AI2: Current input 0 –20mA
AI3: Current input 0 –20mA
Analog outputs: Motor speed

Output current
Digital inputs: Wirings should be

done according to application
demand
DIL: +24V needed to prevent

start interlock
X23: +24V output or external

input
Control Panel CDP 312R
LCD Display
Operation mode keys for:

Drive selection mode
Function mode
Parameter mode
Actual signal display mode RESET- Resets the fault in
the local and remote
control
The use of arrow keys and

REF- Enables reference
ENTER key depend on the
change in local control
operation mode of the
(reference change with
panel
arrow keys)
LOC/REM – Changes START- Starts the drive
between local and remote in local control
control of the drive. (L in the
up left corner of the display
when Local control is selected) STOP - Stops the drive
Direction keysof the local In local control
control: 1-Forward, 0-
Reverse
(when PAR 10.03=request)
LOCAL control
(control from
Drive Status
CONTROL PANEL) Reference can be adjusted by
information:
pressing REF button => brackets
around the reference value. When 1=Running
Drive ID number value is in the brackets the value can
0=Stopped
(normally always 1) be changed with the arrow keys
=No drive
Frequency permission (run
reference disabled, start
interlock)
Status
row 1 L  [ 1242.8 rpm ] I
Display FREQ 55.00 Hz
rows
(actual
signal
CURRENT 76 A
display
normally POWER 55.0 %
visible)
Parameter display and change
Press
FUNCTION: Button:
Go to
parameter mode: 1  1242.8 rpm 0 Status row
PAR
10 Display:
START/STOP/DIR
Display rows:
01 EXT1 STRT/STP/DIR Param. Group
DI1,2 Param. number
Change the Param. value
parameter group down: 1  1242.8 rpm 0
99 Display:
START-UP DATA
01 LANGUAGE
Change the ENGLISH

parameter up: 1  1242.8 rpm 0
99 Display:
START-UP DATA
02 APPLICATION MACRO
FACTORY
Activate the
ENTER
parameter value: 1  1242.8 rpm 0
99 Display:
START-UP DATA
[FACTORY]
Change the
parameter value: 1  1242.8 rpm 0
99 Display:
START-UP DATA
[HAND/AUTO]
Accept the new
parameter value: ENTER 1  1242.8 rpm 0
99 Display:
START-UP DATA
HAND/AUTO
Contoh tampilan Drive Window

Variable Speed Drive

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Di area Finish Mill Tuban 1 dan 2

Seksi PLIFM 1-2

Pengaturan nilai frekuensi dan tegangan ini

Karakteristik IGBT ( Insulated Gate Bipolar Transistor ) :

X21 Analog Inputs Option slot 1

X23 Voltage reference +24V Option slot 3

X26 Relay Output 3

Analog outputs: Motor speed

Digital inputs: Wirings should be

DIL: +24V needed to prevent

X23: +24V output or external

Operation mode keys for:

The use of arrow keys and

Change the ENGLISH

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