AC70 VC CONTROL FREQUENCY INVERTER MANUAL
FUNCTION PARAMETER DETAILED SPECIFICATION
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E-19 Filter
time
0.01-99.99
Default:
※
This function mainly used to torque boost in OLV control mode. The value setting is smaller, the response of torque
boost is faster, the fluctuation of current is bigger, suitable for sudden changing load application; vice versa, the
filter time setting is bigger, the response of torque boost is slower, the fluctuation of current is smaller, suitable for
constant load application.
E-20 Carrier
frequency
Range:0.7KHz-15.0KHz
default:
※
This function mainly used to improve the noise emitting and vibration possibility occurs during inverter operation.
The waveform of current will be good when the carrier frequency is bigger, the noise of motor is smaller. It is very
suitable for application that silent required, but in this case, but the switching loss of main component is bigger, the
temperature rise, efficiency reduces, and output power is smaller. Meanwhile, the radio interference will be bigger,
the leakage of capacitor also increases when run in high carrier frequency, that will result in malfunction of residual
leakage protector which if have installed, over current will be possibility occurs as well. When frequency carrier is
low, it is contrary to the phenomenon mentioned above.
The response of difference motors to carrier frequency is different. The best carrier frequency should be adjust to
gain according actual application site. But the carrier frequency should be set smaller for bigger capacity motor.
Veichi reserve the right to restrict biggest carrier frequency.
Carrier frequency
Motor noise
Electrical interference
Switching loss
0.7KHz
big
↑
small
small
↓
big
small
↓
big
8.0KHz
15.0KHz
Below 4KW: When the carrier frequency is 6 KHz, rated current is the maximum output current.
5.5KW-22KW: When the carrier frequency is 3 KHz, rated current is the maximum output current.
30KW-75KW: When the carrier frequency is 2 KHz, rated current is the maximum output current.
Above 93KW: When the carrier frequency is 1.5 KHz, rated current is the maximum output current.
Note: In order to obtain better control characteristics, the ratio of the carrier frequency to maximum
frequency of the inverter should not less than 36. If inverter works long-term in low frequency, suggest to
reduce the carrier frequency to reduce the impact of the dead zone time.
E-21 Carrier
characteristic
Range:0000-1211
Default:
1010
LED unit Digit: Associate of carrier frequency and output frequency configure.
0: Output frequency associate is disabled.
1: Output frequency associate is enabled.