Low Voltage Operation; Pwm Carrier Frequency - Toshiba Tosvert VF-S15 Instruction Manual

6.17 Low voltage operation

f297 : Low voltage operation upper limit frequency
f298 : Low voltage operation DC voltage
 Refer to "Low voltage operation instruction manual: E6581918" for details.

6.18 PWM carrier frequency

aul : Overload characteristic selection
f300 : PWM carrier frequency
f312 : Random mode
f316 : PWM carrier frequency control mode selection
 Function
6
These parameters are effective in reducing the magnetic noise of the motor, the noise from the inverter and
the resonance with machinery, etc.
1) When reducing the magnetic noise of the motor, increase f300(PWM carrier frequency).
2) When reducing the noise from the inverter, decrease f300.
3) When reducing the resonance with the machinery or the fan cover of the motor, change f300.
4) When the trip of oh (overheat) or ol3 (main module overload) occurs, set f316(PWM carrier
If f300 cannot be increased, set f312(random mode) to "random mode" to reduce magnetic noise
of the motor.
However, the magnetic noise of the motor is increased.
frequency control mode selection) to "Carrier frequency with automatic reduction" to avoid the trip by
reducing the carrier frequency automatically.
However, the magnetic noise of the motor is increased.
F-56
E6582175