SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd. SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
Chapter 4 Explanation of Functions 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 0.5 to 15.0 (kHz) (*1) b083 setting 0.5 to 10.0(kHz) (*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 Inverter capacity Maximum fc (kHz) 200 V class 400 V class Derating at fc=15 kHz 0.4kW 15 100% Maximum fc (kHz) Maximum fc (kHz) 0.75kW 15 100% 15 100% 1.5kW 15 100% 15 100% 2.2kW 15 100% 15 100% 3.7kW (4.0kW) 15 100% 15 100% 5.5kW 15 100% 15 100% 7.5kW 15 100% 15 100% 11kW 12 90%(41.4Aor less) 15 100% 15kW 12 95%(60.8Aor less) 14 95%(30.4Aor less) 18.5kW 10 90%(68.4Aor less) 10 90%(34.2Aor less) 22kW 7 70%(66.5Aor less) 6 75%(36.0Aor less) 30kW 5 80%(96.8Aor less) 10 75%(43.5Aor less) 37kW 10 75%(108.7Aor less) 8 80%(60.0Aor less) 45kW 5 70%(127.4Aor less) 9 75%(68.2Aor less) 55kW 5 70%(154.0Aor less) 6 60%(67.2Aor less) 75kW - - 6 85%(126.7Aor less) 90kW - - 4 75%(132.0Aor less) 110kW - - 6 70%(151.9Aor less) 132kW (150kW) 200V class Derating of output current - - 3 60%(156.0Aor less) 11k 100 %95 %90 15kW 18.5kW 85 80 30kW 45,55k 75 37kW 70 65 22kW 60 55 0.5 2 4 6 8 10 12 1415 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 (75-132kW). 4 - 44 400V class 45k 30kW 100 132kW 90kW 15kW %95 %90 85 80 75 70 65 75kW 110kW 18.5kW 37kW 22kW 60 55kW 55 0.5 2 4 6 8 10 12 1415 Derating of output current Carrier frequency (kHz)
Chapter 4 Explanation of Functions 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). Related code b089: Automatic carrier frequency reduction selection b083: Carrier frequency setting Item Function code Range of data Description Automatic carrier frequency reduction b089 00/01 00: invalid, 01: valid - When the output current increases to 60%, 72%, 84%, or 96% of the rated current, this function reduces the carrier frequency to 12, 9, 6, or 3 kHz, respectively. This function restores the original carrier frequency when the output current decreases to 5% lower than each reduction start level. 0.4~55kW 75~132kW Carrier frequency reduction start level (Restoration level) Carrier frequency after reduction (kHz) Carrier frequency reduction start level (Restoration level) Carrier frequency after reduction (kHz) Less than 60% of rated current 15.0 Less than 60% of rated current 10.0 60% (55%) of rated current 12.0 60% (55%) of rated current 8.0 72% (67%) of rated current 9.0 71% (66%) of rated current 6.0 84% (79%) of rated current 6.0 83% (78%) of rated current 4.5 96% (91%) of rated current 3.0 91% (86%) of rated current 3.0 Carrier frequency 15.0kHz 12.0kHz 9.0kHz 6.0kHz 3.0kHz 0 50 100 60% 72% 84% 96% Output current (%) - 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. 4 - 45
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Chapter 4 Explanation of Functions<br />
4.2.35 Carrier frequency setting<br />
The carrier frequency setting function (b083) allows you to change the<br />
carrier frequency of the PWM waveform output from the inverter.<br />
Increasing the carrier frequency can lower the metallic noise from the motor, but may increase the inverter<br />
noise and current leakage.<br />
You can use this function effectively to avoid resonance of the mechanical system and motor.<br />
Item Function code Range of data Description<br />
Carrier frequency<br />
0.5 to 15.0 (kHz) (*1)<br />
b083<br />
setting<br />
0.5 to 10.0(kHz) (*2)<br />
*1 The maximum carrier frequency varies depending on the inverter capacity.<br />
When increasing the carrier frequency (fc), derate the output current as shown in the following table:<br />
Derated output current is to be set as electronic thermal protection level (4.2.29).<br />
Derating is not needed when electronic thermal level is already set to lower then derating level.<br />
*2 :applied for 75 to 150kW<br />
Voltage<br />
class<br />
Inverter<br />
capacity<br />
Maximum<br />
fc (kHz)<br />
200 V class 400 V class<br />
Derating at fc=15 kHz<br />
0.4kW 15 100%<br />
Maximum<br />
fc (kHz)<br />
Maximum fc (kHz)<br />
0.75kW 15 100% 15 100%<br />
1.5kW 15 100% 15 100%<br />
2.2kW 15 100% 15 100%<br />
3.7kW<br />
(4.0kW)<br />
15 100% 15 100%<br />
5.5kW 15 100% 15 100%<br />
7.5kW 15 100% 15 100%<br />
11kW 12 90%(41.4Aor less) 15 100%<br />
15kW 12 95%(60.8Aor less) 14 95%(30.4Aor less)<br />
18.5kW 10 90%(68.4Aor less) 10 90%(34.2Aor less)<br />
22kW 7 70%(66.5Aor less) 6 75%(36.0Aor less)<br />
30kW 5 80%(96.8Aor less) 10 75%(43.5Aor less)<br />
37kW 10 75%(108.7Aor less) 8 80%(60.0Aor less)<br />
45kW 5 70%(127.4Aor less) 9 75%(68.2Aor less)<br />
55kW 5 70%(154.0Aor less) 6 60%(67.2Aor less)<br />
75kW - - 6 85%(126.7Aor less)<br />
90kW - - 4 75%(132.0Aor less)<br />
110kW - - 6 70%(151.9Aor less)<br />
132kW<br />
(150kW)<br />
200V class<br />
Derating of output current<br />
- - 3 60%(156.0Aor less)<br />
11k<br />
100<br />
%95<br />
%90<br />
15kW<br />
18.5kW<br />
85<br />
80<br />
30kW<br />
45,55k<br />
75<br />
37kW<br />
70<br />
65<br />
22kW<br />
60<br />
55<br />
0.5 2 4 6 8 10 12 1415<br />
Carrier frequency (kHz)<br />
(NOTE) In case of replacing with SJ300 combined with LCR filter, please check the type code of LCR filter<br />
and consult for compatibility (75-132kW).<br />
4 - 44<br />
400V class<br />
45k 30kW<br />
100<br />
132kW 90kW<br />
15kW<br />
%95<br />
%90<br />
85<br />
80<br />
75<br />
70<br />
65<br />
75kW<br />
110kW<br />
18.5kW<br />
37kW<br />
22kW<br />
60<br />
55kW<br />
55<br />
0.5 2 4 6 8 10 12 1415<br />
Derating of output current<br />
Carrier frequency (kHz)