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Chapter 4
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
Carrier frequency
setting
*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
Mode
CT mode
Inverter
Maximum
Derating at fc=15 kHz
capacity
fc (kHz)
0.4kW
15
0.75kW
15
1.5kW
15
2.2kW
15
3.7kW
15
(4.0kW)
5.5kW
15
7.5kW
15
11kW
12
90%(41.4A or less)
15kW
12
95%(60.8A or less)
18.5kW
10
90%(68.4A or less)
22kW
7
70%(66.5A or less)
30kW
5
80%(96.8A or less)
37kW
10
75%(108.7A or less)
45kW
5
70%(127.4A or less)
55kW
5
70%(154.0A or less)
75kW
-
90kW
-
110kW
-
132kW
-
(150kW)
- CT mode
200V class
100
% 95
% 90
% 85
% 80
45,55kW
% 75
% 70
% 65
60
%
% 55
0.5 2
4
6
%
Carrier frequency (kHz)
CT mode : 0.5 to 15.0 (kHz) <0.5 to 10.0(kHz)>
b083
VT mode : 0.5 to 12.0 (kHz) <0.5 to 8.0(kHz)>
200 V class
VT mode
Maximum
Derating at fc=15 kHz
fc (kHz)
100%
12
100%
12
100%
12
100%
12
100%
6
90%(17.6Aor less)
100%
12
100%
12
7
90%(52.2A or less)
8
90%(65.7A or less)
6
90%(76.5A or less)
5
90%(101.7A or less)
8
80%(112.0A or less)
3
75%(126.7A or less)
8
90%(189.0A or less)
3
90%(243A or less)
-
-
-
-
-
-
-
-
22kW
11kW
15kW
18.5kW
30kW
37kW
8
10
12
14
15
Explanation of Functions
b083: Carrier frequency setting
Range of data
CT mode
Maximum
Maximum fc (kHz)
fc (kHz)
100%
-
100%
15
100%
100%
15
100%
100%
15
100%
15
100%
100%
15
100%
100%
15
100%
15
100%
14
95%(30.4A or less)
10
90%(34.2A or less)
6
75%(36.0A or less)
10
75%(43.5A or less)
8
80%(60.0A or less)
9
75%(68.2A or less)
6
60%(67.2A or less)
-
6
85%(126.7A or less)
-
4
75%(132.0A or less)
-
6
70%(151.9A or less)
-
3
60%(156.0A or less)
400V class
90kW
100
% 95
% 90
% 85
% 80
% 75
132kW
% 70
% 65
60
%
% 55
0.5 2
4
%
Carrier frequency (kHz)
4-43
Related code
Description
(*1)(*2)
400 V class
VT mode
Maximum
Maximum fc (kHz)
fc (kHz)
-
-
-
12
100%
12
100%
12
100%
90%(9.9A 以下)
10
12
100%
12
100%
12
100%
12
100%
8
95%(40.8A or less)
8
90%(51.3A or less)
10
80%(56.0A or less)
9
90%(76.5A or less)
8
80%(84.0A or less)
6
75%(101.2A or less)
7
90%(144.0A or less)
3
80%(156.0A or less)
4
85%(195.5A or less)
3
70%(203.0A or less)
75kW
45kW
30kW
18.5kW
37kW
22kW
110kW
6
8
10
12
14
15
15kW
55kW
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