SSINVERTER SSI700, User Manual, Page: 71 / 148

SSI700 User Manual Description of Function Codes
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If the carrier frequency is low, output current has high harmonics, and the power loss and
temperature rise of the motor increase.
If the carrier frequency is high, power loss and temperature rise of the motor declines.
However, the AC drive has an increase in power loss, temperature rise and interference.
Adjusting the carrier frequency will exert influences on the aspects listed in the following
table.
Table 6-1 Influences of carrier frequency adjustment
Carrier frequency Low High
Motor noise Large Small
Output current waveform Bad Good
Motor temperature rise High Low
AC drive temperature rise Low High
Leakage current Small Large
External radiation interference Small Large
The factory setting of carrier frequency varies with the AC drive power. If you need to
modify the carrier frequency, note that if the set carrier frequency is higher than factory
setting, it will lead to an increase in temperature rise of the AC drive's heatsink. In this
case, you need to de-rate the AC drive. Otherwise, the AC drive may overheat and alarm.
Property
Default Setting Range Parameter Name
Function
Code
Group P0: Standard Function Parameters
☆
1
0: No
1: Yes Carrier frequency adjustment
with temperature
P0-16
It is used to set whether the carrier frequency is adjusted based on the temperature. The
AC drive automatically reduces the carrier frequency when detecting that the heatsink
temperature is high. The AC drive resumes the carrier frequency to the set value when
the heatsink temperature becomes normal. This function reduces the overheat alarms.
Property
Default Setting Range Parameter Name
Function
Code
Group P0: Standard Function Parameters
☆
Model
dependent
0.00–650.00s (P0-19 = 2)
0.0–6500.0s (P0-19 = 1)
0–65000s (P0-19 = 0)
Acceleration time 1 P0-17
☆
Model
dependent
0.00–650.00s (P0-19 = 2)
0.0–6500.0s (P0-19 = 1)
0–65000s (P0-19 = 0)
Deceleration time 1 P0-18
Acceleration time indicates the time required by the AC drive to accelerate from 0 Hz to
"Acceleration/Deceleration base frequency" (P0-24), that is, t1 in Figure 6-2.
Deceleration time indicates the time required by the AC drive to decelerate from
"Acceleration/Deceleration base frequency" (P0-24) to 0 Hz, that is, t2 in Figure 6-2.
Figure 6-2 Acceleration/Deceleration time