Toshiba Tosvert VF-AS1 - Manual (Page 38)

E6581301
A-22
1
2.5kHz 4kHz 8kHz 12kHz 16kHz
Carrier frequency (EH)
200V 18.5~45kW (See lines shown in - - - for 22kW)
400V 22~75kW
100%
90%
80%
70%
60%
50%
Output cu
rrent
40°C: (a)
When the upper protection cover is removed under
condition (a)
(b)
50°C: (a)
When the upper protection cover is removed under
condition (a)
(b)
60°C: (a)
When the upper protection cover is removed under
condition (a)
(b)
Ambient temperature: Permanently-installed inverters
400V 90~110kW
2.5kHz 3kHz 4kHz 5kHz 6kHz 7kHz 8kHz
Carrier frequency (EH)
100%
90%
80%
70%
60%
50%
40%
output cu
rrent
Ambient temperature: Permanently-installed inverters
50°C: (a)
(b)
60°C: (a)
(b)
400V 132kW or more
2.5kHz 3kHz 4kHz 5kHz 6kHz 7kHz 8kHz
Carrier frequency (EH)
100%
90%
80%
70%
60%
50%
40%
output cu
rrent
Ambient temperature: Permanently-installed inverters
50°C: (a)
(b)
60°C: (a)
(b)
40°C: (a)
(b)
200V 55kW or more
2.5kHz 3kHz 4kHz 5kHz 6kHz 7kHz 8kHz
Carrier frequency (EH)
100%
90%
80%
70%
60%
50%
40%
output cu
rrent
Ambient temperature: Permanently-installed inverters
40°C: (a)
(b)
50°C: (a)
(b)
60°C: (a)
(b)
+ The rated current indicated on the nameplate of a 15kW inverter or smaller is the current that flows at 4kHz. If the
carrier frequency is set at 12kHz by default, therefore, the rated current needs to be decreased.
For more details, refer to Section 12.
When H=, however, the carrier frequency decreases automatically with increase in current to secure the
rated current for frequencies below 4kHz.
+ Random control is exercised when the motor is operated in a low-frequency range where it produces annoying
magnetic noise.
+ If the carrier frequency control mode selection parameter (H) is set to or , the output voltage may drop.
The carrier frequency (EH) should be set below 4kHz.