Parameter Group
-217-
Value Range:
0.8 kHz to 15.0 kHz
Description
The carrier frequency of the AC drive determines the number of times the power switching device
(such as IGBT) of the drive unit is turned on and off, so it is also called the switching frequency. It
mainly affects the following aspects:
The power loss of the power module IGBT is related to the carrier frequency. As the carrier frequency
increases, the power loss increases and the heating of the power module increases, which is
unfavorable to the AC drive.
When the carrier frequency is high, the waveform of the secondary current output by the AC drive is
sinusoidal and smooth. In this way, the harmonic is small, but the interference is relatively large, and
vice versa. When the carrier frequency is too low, the effective torque of the motor decreases, the loss
increases and the temperature increases. On the contrary, when the carrier frequency is too high, the
loss of the AC drive itself increases, the IGBT temperature rises, and the change rate dv/dt of the
output voltage increases, which has great influence on the insulation of the motor.
F0-16
Carrier frequency adjusted with temperature
Address:
61456
Min.:
0
Unit:
-
Max.: 1 Data type: UInt16
Default:
1
Change:
At once
Value Range:
0: No
1: Yes
Description
This parameter defines whether the carrier frequency changes with the temperature.
F0-17
Acceleration time 1
Address:
61457
Min.:
0.0
Unit:
s
Max.: 6500.0 Data type: UInt16
Default:
20.0
Change:
At once
Value Range:
0.0s to 6500.0s
Description
The acceleration time indicates the time required for the output frequency to rise from 0 to F0-25
(acceleration/deceleration base frequency). It is usually determined by the rise of the frequency
reference signal. When the motor accelerates, the rising rate of the frequency reference must be
limited to prevent overcurrent.
The acceleration current must be limited below the overcurrent capacity of the AC drive to prevent
the AC drive from tripping due to overcurrent stall.
F0-18
Deceleration time 1
Address:
61458
Min.:
0.0
Unit:
s
Max.: 6500.0 Data type: UInt16
Default:
20.0
Change:
At once
Value Range:
0.0s to 6500.0s
Description
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