Fuji Electric Frenic lift, Reference Manual

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F26 Motor Sound (Carrier frequency)
H98 (Protection/Maintenance Function)
L198 (Operation setting switch 1)
F26 controls the carrier frequency so as to reduce an audible noise generated by the motor or inverter
itself, and to decrease a leakage current from the main output (secondary) wirings.
Carrier frequency 5 kHz ↔ 16 kHz
Motor sound noise emission High ↔ Low
Motor temperature (due to harmonics components) High ↔ Low
Ripples in output current waveform Large ↔ Small
Leakage current Low ↔ High
Electromagnetic noise emission Low ↔ High
Inverter loss Low ↔ High

Operation setting switch 1 - Fixation of the carrier frequency (L198 bit0)
If F26 is set to 16 and L198 bit0 is set to 1, the inverter will be running at 16 kHz of carrier
frequency independently of the output frequency.
Specifying a too low carrier frequency will cause the output current waveform to have a
large amount of ripples (many harmonics components). 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 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 overheat alarm OH3
or inverter overload alarm OLU. In order to keep low acustic noise level on the motor, this
function can be disabled (see function code H98).
F30 to F31
Analog Output [FMA] (Output gain, Function selection)
These function codes allow terminal [FMA] to output monitored data such as the output frequency
and the output current in an analog DC voltage or current. The magnitude of such analog voltage or
current is adjustable.

Output gain (F30)
F30 allows you to adjust the output voltage within the range of 0 to 300%.
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