High Starting Torque, Powerful Drive And Easy Setting; Trip Avoidance Function; Possible With Sj700 Series; Vector Control - Hitachi SJ700 series Manual

S
Series
Line up
For More Precise Control
High starting torque,
Powerful drive and easy setting
High starting torque
Improved sensorless vector control and auto tuning
produce high starting torque of 200% or more at 0.3Hz.*
Easy setup of motor constants
Ideal for applications which need high torque, such as
cranes, extruders and lifts.
200
0.3Hz
100
0
-100
-200
*1 Starting torque
Series Applicable motor
SJ700D(CT)
SJ700 185 to 400kW
SJ700B

Possible with SJ700 series

Hitachi exclusive
0Hz domain sensorless

vector control

Develops 150% (SJ700B:120%) *
0Hz speed reference
Ideal for cranes and other applications
that require high torque upon starting.
2
* when inverter is one frame size larger than motor.
Position control function
The SJ700D/SJ700/SJ700B, with optional feedback board
installed, together with an encoder-equipped motor can
perform position control.
For many applications, suitable performance can be
achieved at a lower cost than servo systems.
Based on your four motion parameters (position command,
speed command, acceleration time and deceleration time),
the SJ700D/SJ700/SJ700B will move an object from original
position A to target position B.
After the movement,
the inverter keeps
hold motor position.
) Derating is applied for SJ700B. Please consult technician at Hitachi or its distributor before use.
*
3
J 700
Motor Torque vs. Speed
300 600 900 1200 1500 1800
Speed (min -1 )
Starting torque
0.4 to 55kW 0.3Hz/200%
75 to 132kW 0.3Hz/180%
0.3Hz/150%
11 to 75kW 0.5Hz/150%
90 to 160kW 0.5Hz/120%
)
*
2 torque at
Starting point A
Target point B
S J 700B
For General Purpose Use

Trip avoidance function

Over current &
voltage suppress function
1
Higher internal calculation speed improves current control
performance.
Over-current suppress and Over-voltage suppress functions
avoid inverter trips during acceleration and deceleration.
Frequency
Motor current
Over-current suppress OFF
Impact load
Suppresses over current and continues running
Over-current suppress ON
DC bus AVR function
during deceleration
)
*
The SJ700D/SJ700/SJ700B controls deceleration time so that
the DC bus voltage does not exceed the over-voltage trip
level, providing trip-less operation during deceleration.
Motor current
Output frequency
Over-current trip
Voltage of the
main circuit DC