Pwm Carrier Frequency - Toshiba TOSVERT VF-nC3 Instruction Manual

6.11 PWM carrier frequency

 : PWM carrier frequency
 : Random mode
 : Carrier frequency control mode selection
 Function
These parameters are effective in preventing the magnetic noise reduction from the motor, noise reduction,
the measure against resonance with load machine, etc.
1) When you reduce the magnetic noise from the motor, increase the f300: PWM carrier frequency.
2) When you reduce the noise which generates from the inverter, decrease the carrier frequency.
3) When resonating with the load machine and the fan cover of the motor, an effect will be acquired if
4) If f316: PWM carrier frequency control mode selection is set to "Carrier frequency with automatic
6
[Parameter setting]
Title



Note 1: By f300 setting and ambient temperature, current reduction may be required.
Note 2: PWM carrier frequency is increased at high output frequency area (guide: 100 Hz or more) for stable
Note 3: Random mode is exercised with the low output frequency which a magnetic noise from the motor worries
Note 4: If f316 is set to "Carrier frequency without reduction", oh (overheat) or ol3 (main module overload),
If f312: random mode is set up when the f300 cannot be set up highly, the magnetic noise from
the motor is decreased.
However, the magnetic noise from the motor is increased.
f300 is changed.
reduction" when carrying out the trip by oh (overheat) or ol3 (main module overload), the carrier
frequency is reduced automatically and the trip can be avoided. However, the magnetic noise from the
motor is increased.
Function
PWM carrier frequency
Random mode
Carrier frequency control mode
selection
Refer to the table on the following page.
operation, even if f300 is set to low PWM carrier frequency.
when f300 is 8kHz or less.
occurs. In this case, to avoid the trip, reduce the stall prevention level (f601, f185) properly.
Adjustment range
2-16 (kHz)
0: Disabled, 1: Automatic setting
0: Carrier frequency without reduction
1: Carrier frequency with automatic reduction
F-22
E6581595
Default setting
12
0
1