Hitachi SJ700-4000HFU2

Chapter 4 Explanation of Functions
4-43
4.2.35 Carrier frequency setting
The carrier frequency setting function (b083) allows you to change the carrier frequency of the PWM waveform
output from the inverter.
Increasing the carrier frequency can lower the metallic noise from the motor, but may increase the inverter noise and
current leakage.
You can use this function effectively to avoid resonance of the mechanical system and motor.
Item
Function code
Range of data
Description
Carrier frequency
setting
b083
CT mode : 0.5 to 15.0 (kHz) <0.5 to 10.0(kHz)>
VT mode : 0.5 to 12.0 (kHz) <0.5 to 8.0(kHz)>
(*1)(*2)
*1 The maximum carrier frequency varies depending on the inverter capacity.
When increasing the carrier frequency (fc), derate the output current as shown in the following table:
Derated output current is to be set as electronic thermal protection level (4.2.29).
Derating is not needed when electronic thermal level is already set to lower then derating level.
*2 <>:applied for 75 to 150kW
Voltage
class
200 V class
400 V class
Mode
CT mode
VT mode
CT mode
VT mode
Inverter
capacity
Maximum
fc (kHz)
Derating at fc=15 kHz
Maximum
fc (kHz)
Derating at fc=15 kHz
Maximum
fc (kHz)
Maximum fc (kHz)
Maximum
fc (kHz)
Maximum fc (kHz)
0.4kW
15
100%
12
100%
-
-
-
-
0.75kW
15
100%
12
100%
15
100%
12
100%
1.5kW
15
100%
12
100%
15
100%
12
100%
2.2kW
15
100%
12
100%
15
100%
12
100%
3.7kW
(4.0kW)
15
100%
6
90%(17.6Aor less)
15
100%
10
90%(9.9A 以下)
5.5kW
15
100%
12
100%
15
100%
12
100%
7.5kW
15
100%
12
100%
15
100%
12
100%
11kW
12
90%(41.4A or less)
7
90%(52.2A or less)
15
100%
12
100%
15kW
12
95%(60.8A or less)
8
90%(65.7A or less)
14
95%(30.4A or less)
12
100%
18.5kW
10
90%(68.4A or less)
6
90%(76.5A or less)
10
90%(34.2A or less)
8
95%(40.8A or less)
22kW
7
70%(66.5A or less)
5
90%(101.7A or less)
6
75%(36.0A or less)
8
90%(51.3A or less)
30kW
5
80%(96.8A or less)
8
80%(112.0A or less)
10
75%(43.5A or less)
10
80%(56.0A or less)
37kW
10
75%(108.7A or less)
3
75%(126.7A or less)
8
80%(60.0A or less)
9
90%(76.5A or less)
45kW
5
70%(127.4A or less)
8
90%(189.0A or less)
9
75%(68.2A or less)
8
80%(84.0A or less)
55kW
5
70%(154.0A or less)
3
90%(243A or less)
6
60%(67.2A or less)
6
75%(101.2A or less)
75kW
-
-
-
-
6
85%(126.7A or less)
7
90%(144.0A or less)
90kW
-
-
-
-
4
75%(132.0A or less)
3
80%(156.0A or less)
110kW
-
-
-
-
6
70%(151.9A or less)
4
85%(195.5A or less)
132kW
(150kW)
-
-
-
-
3
60%(156.0A or less)
3
70%(203.0A or less)
- CT mode
b083: Carrier frequency setting
Related code
Carrier frequency (kHz)
Derating of output current
60
%
55
%
100
%
95
%
90
%
85
%
80
%
75
%
70
%
65
%
15kW
18.5kW
37kW
30kW
200V class
0.5
2
4
6
8
10
12
15
14
22kW
11kW
45,55kW
Derating of output current
60
%
55
%
100
%
95
%
90
%
85
%
80
%
75
%
70
%
65
%
15kW
18.5kW
37kW
30kW
400V class
0.5
2
4
6
8
10
12
15
14
55kW
45kW
22kW
Carrier frequency (kHz)
90kW
132kW
75kW
110kW