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Chapter 4
- VT mode
3.7,18.5kW
200V class
22kW
100
% 95
% 90
% 85
55kW
% 80
% 75
% 70
% 65
60
%
% 55
0.5 2
4
6
%
Carrier frequency (kHz)
(NOTE) In case of replacing with SJ300 combined with LCR filter, please check the type code of LCR filter and consult for
compatibility (75-150kW).
4.2.36 Automatic carrier frequency reduction
- The automatic carrier frequency reduction function automatically reduces the
carrier frequency according to the increase in output current.
- To enable this function, specify "01" for automatic carrier frequency reduction
selection (b089).
Item
Automatic carrier
frequency reduction
- When the output current increases to the current level described below, this function reduces the carrier frequency,
respectively. This function restores the original carrier frequency when the output current decreases to 5% lower
than each reduction start level.
Carrier frequency reduction start level
(Restoration level)
Less than 60% of rated current
60% (55%) of rated current
72% (67%) of rated current
84% (79%) of rated current
96% (91%) of rated current
(Example) 0.4 to 55kW(CT mode)
Carrier frequency
15.0kHz
12.0kHz
9.0kHz
6.0kHz
3.0kHz
- The rate of carrier frequency reduction is 2 kHz per second.
- The maximum limit of carrier frequency change by this function is the value specified for the carrier frequency setting
(b083); the minimum limit is 3 kHz.
Note: If 3 kHz or less frequency has been specified for b083, this function is disabled regardless of the setting of b089.
11kW
15,45kW
30kW
37kW
8
10
12
Function code
Range of data
b089
0.4 to 55kW(CT mode)
15.0
12.0
9.0
6.0
3.0
0
50
Explanation of Functions
400V class
110kW
100
% 95
% 90
% 85
% 80
132kW
% 75
% 70
90kW
% 65
60
%
% 55
0.5 2
4
%
Carrier frequency (kHz)
00/01
00: invalid, 01: valid
75 to 150kW(CT mode)
0.4 to 55kW(VT mode)
Carrier frequency after reduction (kHz)
10.0
8.0
6.0
4.5
3.0
100
60%
72%
84% 96%
4-44
3.7kW
75kW
37kW
18.5kW
22kW
30kW
55kW
45kW
6
8
10
12
Related code
b089: Automatic carrier frequency
reduction selection
b083: Carrier frequency setting
Description
75 to 150kW(VT mode)
6.0
5.0
4.0
3.0
2.5
Output current (%)
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