4-2 Function Mode Carrier Frequency •You can change the PWM waveform carrier frequency output from the Inverter. •With the carrier frequency set high, you can reduce metallic noise from the motor. However, this increases noise or leakage current from the Inverter. •Helps avoid mechanical or motor resonance. •The maximum carrier frequency varies depending on the capacity. To raise the carrier frequency (fc), derate the output current as shown in the following table. •Set a derating output current value as electronic thermal level.
(If the existing electronic thermal value is lower than the derating value, the above setting is not required.) For details on the electronic thermal function, refer to page 4-46. 4 Functions 200-V class 400-V class 11 kW 18.5 kW 22 kW 30 kW 100 95 90 85 80 75 70 65 15 kW 100 95 90 85 80 75 70 65 15 kW Output current derating Output current derating 18.5 kW 37 kW 30 kW 37 kW 45 kW 60 55 60 55 0.5 2 4 6 8 10 12 15 14 0.5 2 4 6 8 10 12 15 14 55 kW Carrier frequency (kHz) Carrier frequency (kHz) •If the above maximum rated carrier frequency and the derating value at 15 kHz are exceeded, the Inverter may be damaged and/or the service life may be shortened. 4-65 Parameter No.
Function name Data Default setting Unit b083 Carrier frequency 0.5 to 15.0 * 5.0 kHz Voltage 200-V class 400-V class Capacity Max. fc (kHz) Derating at fc = 15 kHz Max. fc (kHz) Derating at fc = 15 kHz 5.5 kW 15 100% 15 100% 7.5 kW 15 100% 15 100% 11 kW 12 90% (41.4 max.) 15 100% 15 kW 12 95% (60.8 A max.) 14 95% (30.4 A max.) 18.5 kW 10 90% (68.4 A max.) 10 90% (34.2 A max.) 22 kW 7 70% (66.5 A max.) 6 75% (36.0 A max.) 30 kW 5 80% (96.8 A max.) 10 75% (43.5 A max.) 37 kW 10 75% (108.7 A max.) 8 80% (60.0 A max.) 45 kW 5 70% (127.4 A max.) 9 75% (68.2 A max.) 55 kW 5 70% (154 A max.) 6 60% (67.2 A max.) 45, 55 kW 22 kW