Motor Sound - FujiFilm FVR-Micro Instruction Manual

F26,F27
Motor Sound (Carrier frequency and tone)
 Motor sound (Carrier frequency) (F26)
F26 controls the carrier frequency so as to reduce an audible noise generated by the motor or
electromagnetic noise from the inverter itself, and to decrease a leakage current from the main
output (secondary) wirings.
Carrier frequency
Motor sound noise emission
Motor temperature (due to harmonics components)
Ripples in output current waveform
Leakage current
Electromagnetic noise emission
Inverter loss
Specifying a too low carrier frequency will cause the output current waveform
to have a large amount of ripples. As a result, the motor loss increases, causing
the motor temperature to rise. Furthermore, the large amount of ripples tends to
cause a current limiting alarm. When the carrier frequency is set to 1 kHz or
below, therefore, reduce the load so that the inverter output current comes to be
80% or less of the rated current.
When a high carrier frequency is specified, the temperature of the inverter may rise
due to an ambient temperature rise or an increase of the load. If it happens, the
inverter automatically decreases the carrier frequency to prevent the inverter
overload alarm OLU . With consideration for motor noise, the automatic reduction of
carrier frequency can be disabled. Refer to the description of H98.
 Motor sound (Tone) (F27)
F27 changes the motor running sound tone. This setting is effective when the carrier frequency
set to function code F26 is 7 kHz or lower. Changing the tone level may reduce the high and
harsh running noise from the motor.
If the sound level is set too high, the output current may become unstable, or
mechanical vibration and noise may increase. Also, these function codes may not be
very effective for certain types of motor.
0.75 to 16 kHz
High ↔ Low
High ↔ Low
Large ↔ Small
Low ↔ High
Low ↔ High
Low ↔ High
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