Maximum Frequency Setting (A004/A204); Carrier Frequency Setting (B083) - Hitachi NES1-004SB Quick Reference Manual

7.2.9 Maximum frequency setting
The maximum frequency setting function allows you to set the
maximum frequency of the motor driven by the inverter.
The maximum frequency set here corresponds to the maximum level
of each external analog input (for example, 10 V of the input of 0 to 10
V).
To switch the maximum frequency among the 1st and 2nd settings,
assign function "08" (SET) to intelligent input terminals. Use the SET
signal for switching.
The inverter output voltage with the frequency ranging from the base
frequency to the maximum frequency is that selected by the AVR
voltage select function (A082/A282).
Item
Maximum frequency
setting
7.2.10 Carrier frequency setting
The carrier frequency setting function (b083) allows you to change the carrier frequency of the PWM
waveform output from the inverter.
Increasing the carrier frequency can lower the metallic noise from the motor, but may increase the inverter
noise and current leakage.
You can use this function effectively to avoid resonance of the mechanical system and motor.
Item
Carrier frequency
setting
Note: When increasing the carrier frequency (fc), derate the output current as shown in the section 12.3.
Function code
base frequency 1st/2nd
A004/A204
motors to 400. (Hz)
Function code
b083 2.0 to 15.0 (kHz)
Chapter 7 Explanation of Functions
Range of data
The maximum output frequency is set.
Range of data
7 - 11
Output
voltage
AVR
voltage
select
(100%)
Base
frequency
Description
Description
Maximum
frequency