Torque Characteristics; Derating Data - Hitachi SJ300 Series Manual

TORQUE CHARACTERISTICS

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.
・High starting torque of 200% or greater at 0.5Hz
・Continuous operating torque of 100% within 1:10 speed range. (Up to 3.7kW)
Typical torque performance based on
V/f pattern (below) is shown to the right.
V/f pattern
V
100 （％）
1 - 50
1 - 60

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.
( 200V class )
100
90
80
70
60
0 2 4
Derating data for ambient temperature 50˚C, input voltage 240/480V.
43
200
175
150
130
125
100
95
90
80
75
100 （Hz） f
120
50
45
25
004 - 110LF
150LF
370LF
450LF
185LF
300LF
550LF
220LF
6 8 10 12 14
Carrier frequency (kHz)
Short time period operating
torque of sensorless vector control
Short time period operating
torque of V/f control
Continuous operating torque of
sensorless vector control
(continuous torque)
Continuous operating torque of V/f control
0
0.5 6 10 20 30 40 50
5 25
Frequency(Hz)
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.)
( 400V class )
100
90
1320, 1500HF
80
70
60
0 2 4
15
60 70 80 90 100 110
50 75
007 - 185HF
750HF
370HF
1100HF
900HF
220HF
300HF
550HF
6 8 10 12
Carrier frequency (kHz)
120
100
450HF
14