Emerson 2202 Advanced User's Manual page 63

Parameter Parameter
Introduction
x.00 description format
The scaling of the current feedback is based on the ratings of the drive as follows:
Level
Over-current trip
Open-loop peak limit
Open-loop maximum standard operating current
Rated drive current
Maximum Normal Duty current rating
Maximum motor rated current
* 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.
200V
Max
Rated Heavy Normal
Model drive Duty
current current current
rating rating
2202 17 17
2203 25 25
3201 31 31
3202 42 42
4201 56 56
4202 68 68
4203 80 80
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.
R i
s sx
R i
s sy
v*
i
sy
cos (PF)
ϕ ≈
Commander SK Advanced User Guide
Issue Number: 9
Keypad and Serial
display communications
x rated drive current
2.2
1.75
1.5
1.0
≤1.36*
≤1.36*
400V
Max Max
Rated Heavy
Duty Model drive Duty
current current
rating
22 2401 13 13
28 2402 16.5 16.5
42 2403 23 25
54 2404 26 26
68 3401 32 32
80 3402 40 40
104 3403 46 46
4401 60 60
4402 74 74
4403 96 96
5401 124 124
5402 156 156
6401 154.2 180
6402 180 210
-1
Stator flux
(in steady state)
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575V
Max Max
Normal Rated Heavy
Duty Model drive Duty
current current current
rating rating
15.3 3501 4.1 4.1
21 3502 5.4 5.4
29 3503 6.1 6.1
29 3504 9.5 9.5
35 3505 12 12
43 3506 18 18
56 3507 22 22
68
83
104
138
168
205
236
Advanced parameter
Menu 0
descriptions
690V
Max Max
Normal Rated Heavy
Duty Model drive Duty
current current current
rating rating
5.4 4601 19 19
6.1 4602 22 22
8.4 4603 27 27
11 4604 36 36
16 4605 43 43
22 4606 52 52
27 5601 63 63
5602 85 85
6601 85.7 100
6602 107.1 125
Menu 4
Max
Normal
Duty
current
rating
22
27
36
43
52
62
84
99
125
144
63