Chapter 4 - Parameter Description [FU2]

If you know the motor parameters, set the values in the relevant codes for better control performance.

(This value is set according to the model number before shipping)

This is used to display the motor speed. If you set this value to 2, inverter will display 3600 rpm instead 1800rpm at 60Hz output frequency. (See motor nameplate)

This is used in ‘Slip Compensation’ control. If you set this value incorrectly, motor may stall during slip compensation control. (See motor nameplate)

This is very importance parameter that must be set correctly. This value is referenced in many other inverter parameters. (See motor nameplate)

This parameter is only displayed when ‘Slip Compen’ is selected in FU2-40 [Control Method].

This function is used to maintain constant motor speed. To keep the motor speed constant, the output frequency varies within the limit of slip frequency set in FU2-32 according to the load current. For example, when the motor speed decreases below the reference speed (frequency) due to a heavy load, the inverter increases the output frequency higher than the reference frequency to increase the motor speed. The inverter increases or decreases the output by delta frequency shown below.

Delta

 

Output current – No load

=

 

× Rated Slip

 

Freq.

 

Rated current – No load

 

 

Output frequency = Reference freq. + Delta freq.

This value is used for calculating the output wattage when FU2-72 is set to ‘Watt’.

This parameter is used for sensorless control, minimum Accel/Decel, optimum Accel/Decel and speed search. For better control performance, this value must be set as exact as possible.

Set ‘0’ for loads that has load inertia less than 10 times that of motor inertia.

Set ‘1’ for loads that have load inertia about 10 times that of motor inertia.

FU2-39: Carrier Frequency

This parameter affects the audible sound of the motor, noise emission from the inverter, inverter temperature, and leakage current. If the ambient temperature where the inverter is installed is high or other equipment may be affected by potential inverter noise, set this value lower.

This is also used to avoid an induced resonance in the machine or motor.

☞Note: If this value must be set higher than 3 kHz, derate the load current by 5% per 1 kHz.

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Cleveland Range inverter manual FU2-39 Carrier Frequency
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inverter specifications

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