Pwm Carrier Frequency - Toshiba TOSVERT VF-FS1 Instruction Manual

6.11 PWM carrier frequency

: PWM carrier frequency
: Random mode
: Carrier frequency control mode selection
• Function
1) The
switching the PWM carrier frequency. This parameter is also effective in preventing the motor from
resonating with its load machine or its fan cover.
2) In addition, the
Reduce the carrier frequency to reduce electromagnetic noise. Note: Although the electromagnetic
noise level is reduced, the acoustic noise of the motor is increased.
3) The random mode reduces motor electromagnetic noise by changing the pattern of the reduced carrier
frequency.
[Parameter setting]
Title
PWM carrier frequency
Random mode
Carrier frequency control mode
selection
* Reduction of rated current will be required if the PWM carrier frequency is modified for each applicable motor
model. Refer to the following figure.
* When the PWM carrier frequency is set high, selecting "Carrier frequency not reduced automatically" causes
the inverter to be tripped more easily than selecting "Carrier frequency reduced automatically."
parameter allows the tone of the magnetic noise from the motor to be changed by
parameter reduces the electromagnetic noise generated by the inverter.
Function
6.0-16.0 (kHz) (*)
0: Disabled, 1: Enabled
0: Carrier frequency not reduced
1: Carrier frequency reduced
2: Carrier frequency not reduced
3: Carrier frequency reduced
F-27
Adjustment range
automatically
automatically
automatically
Support for 400V models
automatically
Support for 400V models.
E6581381
6
Default setting
12.0 or 8.0
Depending on model
( ⇒ See page K-14)
0
1