Hitachi SJ300 Series

43
TORQUE CHARACTERISTICS
Typical torque performance based on
V/f pattern (below) is shown to the right.
High starting torque is accomplished even with a general-purpose motor by the torque calculation software
that Hitachi has uniquely developed first in the industry.
DERATING DATA
The SJ300 series can be used at ambient temperature of - 10˚C to 50˚C.
However, when using at 50˚C, derating is required.
・High starting torque of 200% or greater at 0.5Hz
・Continuous operating torque of 100% within 1:10 speed range. (Up to 3.7kW)
150
175
200
130
125
100
95
90
80
75
50
45
25
0
0.5 6 10 20 30 40 50 60 70 80 90 100 110 120
525 50 75 100
(continuous torque)
Continuous operating torque of V/f control
Continuous operating torque of
sensorless vector control
Frequency(Hz)
Output torque(%)
Example of SJ300-015LFU driving a Hitachi's
1.5kw 4-pole totally enclosed type motor (Base frequency of 60 Hz)
(Note: Torque characteristics may vary according to the model.)
V
（Hz）f
V/f pattern
100（％）
1 
- 50
1 
- 60
100
120
Short time period operating
torque of V/f control
Short time period operating
torque of sensorless vector control
Derating data for ambient temperature 50˚C, input voltage 240/480V.
15
20
60
70
80
90
100
468101214
450HF
007
-
185HF
370HF
300HF
220HF
1100HF
900HF
750HF
550HF
1320, 1500HF
Carrier frequency (kHz) Carrier frequency (kHz)
20
60
70
80
90
100
468101214
004
-
110LF
150LF
370LF
185LF
300LF
550LF
220LF
450LF
(
200V class
)(
400V class
)
Output current
(
Ratio to the rating : %
)
Output current
(
Ratio to the rating : %
)