Introduction
Parameter
x.00
Parameter
description format
Keypad and
display
Serial
communications
CT Modbus
RTU
PLC Ladder
programming
CTSoft Menu 0
Advanced parameter
descriptions
Menu 4
Commander SK Advanced User Guide 63
Issue Number: 9 www.controltechniques.com
The scaling of the current feedback is based on the ratings of the drive as follows:
* On drives that offer dual rating, the rated current can be increased above the rated drive current up to a level not exceeding 1.36 x drive rated
current. The actual level varies from one drive size to another.
The drive has a current controller to give current limiting in frequency control mode and a torque controller in torque control mode. The active current
is controlled by modification of the drive output frequency. Menu 4 provides parameters to set-up the current controller. Additional voltage based
current control is provided to limit transients (peak-limit), but there are no user parameters to control this.
The drive operates in the stator flux reference frame under steady state conditions. The absolute maximum motor current is defined by the peak limit
system as 1.75 x rated drive current. However, the drive does not normally operate at this level, but uses the peak limit system as protection against
over-current trips. Under normal operation the motor current is limited to 1.50 x rated drive current, allowing a safety margin between the maximum
normal operating current and the peak limit level.
DRIVE_CURRENT_MAX is full scale current feedback, i.e. rated drive current x 2.0.
The relationship between the voltage and current is shown in the following vector diagram.
Level x rated drive current
Over-current trip 2.2
Open-loop peak limit 1.75
Open-loop maximum standard operating current 1.5
Rated drive current 1.0
Maximum Normal Duty current rating ≤1.36*
Maximum motor rated current ≤1.36*
200V 400V 575V 690V
Model
Rated
drive
current
Max
Heavy
Duty
current
rating
Max
Normal
Duty
current
rating
Model
Rated
drive
current
Max
Heavy
Duty
current
rating
Max
Normal
Duty
current
rating
Model
Rated
drive
current
Max
Heavy
Duty
current
rating
Max
Normal
Duty
current
rating
Model
Rated
drive
current
Max
Heavy
Duty
current
rating
Max
Normal
Duty
current
rating
2202 17 17 22 2401 13 13 15.3 3501 4.1 4.1 5.4 4601 19 19 22
2203 25 25 28 2402 16.5 16.5 21 3502 5.4 5.4 6.1 4602 22 22 27
3201 31 31 42 2403 23 25 29 3503 6.1 6.1 8.4 4603 27 27 36
3202 42 42 54 2404 26 26 29 3504 9.5 9.5 11 4604 36 36 43
4201 56 56 68 3401 32 32 35 3505 12 12 16 4605 43 43 52
4202 68 68 80 3402 40 40 43 3506 18 18 22 4606 52 52 62
4203 80 80 104 3403 46 46 56 3507 22 22 27 5601 63 63 84
4401 60 60 68 5602 85 85 99
4402 74 74 83 6601 85.7 100 125
4403 96 96 104 6602 107.1 125 144
5401 124 124 138
5402 156 156 168
6401 154.2 180 205
6402 180 210 236
v*
Stator flux
(in steady state)
ϕ ≈
cos (PF)
-1
Ri
ssx
Ri
ssy
i
sy
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