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4 - GENERAL PARAMETERS, DESCRIPTION
4 - 6
GV3000/SE
49'1329 e
P.005
Current Limit
Parameter Range:
V/Hz:
50% to 100 or 110% (depending on P/U size, Power Unit Output Amps
(P.095) are either corresponding to 100 or 110%).
Refer to Table 2-3 on page 2-10 of manual 49’1327.
Vector: U.006 (Magnetizing Amps) up to 150% of U.004 (Motor Nameplate
Amps).
Initial Setting:
Power Unit size dependent
Type:
Tunable (at rest or during operation)
Refer to:
P.095 Power Unit Output Amps
H.002 Motor Nameplate Amps
U.004 Motor Nameplate Amps
U.006 Motor Magnetizing Amps
Description:
This parameter provides the means to limit motor stator current while running at constant
speed or during acceleration.
Maximum current is dependent on selected Power Unit Size, Regulation Type (P.048),
and Carrier Frequency (P.047). P.095 provides the maximum current value in Amps.
Refer to manual 49'1327 'GV3000 Power Unit' Tables 2-3 and 2-4 for values per Power
Unit Size.
If U.000 = 1 or 2, the Current Limit parameter (P.005) is not applied.
V/Hz :
Set parameter (P.005) to the calculated value corresponding to the percentage of Motor
Nameplate Amps (H.002) related to Power Unit Output Amps (P.095) (which is either 100
or 110%, depending on P/U size).
Application Limits
: The ratio of Power Unit Output Amps (P.095) to Motor Nameplate
Amps (H.002) should not be
greater than
3 to 1
and the following must be observed:
a) If Torque Boost (H.003) is used (value >0) don’t adjust P.005 below a percentage
value corresponding
to 75% of
Motor Nameplate Amps (H.002)
.
b) If Torque Boost (H.003) is disabled (value =0) don’t adjust P.005 below a percentage
value
corresponding
to 100% of
Motor Nameplate Amps (H.002
).
When the output current attempts to exceed the preset current limit, the output voltage
and frequency will be lowered as the GV3000/SE drive reduces output current.
Vector:
Current limit is a value in percentage of Motor Nameplate Amps (U.004).
Don’t set limit to a corresponding value greater than Power Unit Output Amps (P.095).
Torque is not proportional to stator current, and therefore, current limit is not linear to the
amount of torque produced. The following equation shows how maximum torque is
reached if magnetizing current is constant in the range between no load and current limit:
%Max. Torque
%current
I
10000
I
x 100
Limit
2
Magn.
2
Magn.
2
=
−
−
%
%
%
.
I
no load current
rated current
x
Magn
=
100
Содержание GV3000SE
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