Chapter 6 - Parameter Description [FU2]

motor capacity. The motor related parameters are FU2-32 [Rated Motor Slip], FU2-33 [Rated Motor Current], FU2-34 [No Load Motor Current], FU2-42 [Stator Resistance], FU2-43 [Rotor Resistance], and FU2-44 [Leakage Inductance].

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

FU2► Pole number

 

31

 

4

 

31

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Factory Default:

4

 

 

 

4

 

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)

FU2► Rated-Slip

 

 

32

 

3.00

 

32

3.00 Hz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Factory Default:

3.00 Hz

 

 

3.00

 

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

FU2► Rated-Curr

 

33

 

3.6

 

33

3.6 A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Factory Default:

3.6 A

 

 

3.6

 

(This value is set according to the motor capacity set in FU2-30)

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

FU2► Noload-Curr

 

34

 

1.8

 

34

1.8 A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Factory Default:

1.8 A

 

 

1.8

 

(This value is set according to the motor capacity set in FU2-30)

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 current

=

 

× Rated Slip

 

Freq.

 

Rated current – No load current

 

 

 

 

 

 

Output frequency = Reference freq. + Delta freq.

FU2► Efficiency

 

36

 

72

 

36

72 %

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Factory Default:

72%

 

 

 

72

 

(This value is set according to the motor capacity set in FU2-30)

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

FU2►Inertia rate

 

37

 

0

 

37

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Factory Default:

0

 

 

 

0

 

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.

FU2-38: Carrier Frequency

FU2►Carrier freq

 

 

38

 

 

5

 

38

 

5 kHz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Factory Default:

 

5 kHz

 

 

 

 

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Code

 

LCD Display

 

Description

 

 

Factory

 

Setting range

 

 

 

 

 

setting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FU2-

 

Carrier freq

 

Carrier

 

 

5 [kHz]

 

1 ~ 15 [kHz]

 

38

 

 

Frequency

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6-21

Page 113
Image 113
HP 30 30 manual FU2-38 Carrier Frequency