CMC 30 HP30, Installation And Operation Instruction Manual

Page: 113 / 218

Chapter 6 - Parameter Description [FU2]
6-21
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.
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.
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.
FU2-38: Carrier Frequency
Code LCD Display Description
Factory
setting
Setting range
FU2-
38
Carrier freq
Carrier
Frequency
5 [kHz] 1 ~ 15 [kHz]
FU2
►
Pole number
31 4
Factory Default:
4
4
FU2
►
Rated-Slip
32 3.00 Hz
Factory Default:
3.00 Hz
3.00
FU2
►
Rated-Curr
33 3.6 A
3.6
33
Factory Default:
3.6 A
3.6
(This value is set according to the motor capacity set in FU2-30)
FU2
►
Noload-Curr
34 1.8 A
1.8 34
Factory Default:
1.8 A
1.8
(This value is set according to the motor capacity set in FU2-30)
Delta
Freq.
=
Output current – No load current
Rated current – No load current
Rated Slip
×
3.00 32
4 31
FU2
►
Efficiency
36 72 %
72 36
Factory Default:
72%
72
(This value is set according to the motor capacity set in FU2-30)
FU2
►
Inertia rate
37 0
0 37
Factory Default:
0
0
FU2
►
Carrier freq
38 5 kHz
5 38
Factory Default:
5 kHz
5