Emerson Unidrive SPM User Manual

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Unidrive SPM User Guide 69
Issue Number: 3 www.controltechniques.com
6.3 Output sharing choke specification
In order to achieve the best possible current sharing between paralleled
Unidrive SPM modules, sharing chokes must be installed between the
motor output connections and the drive’s motor connections.
Table 6-6 400V output sharing choke ratings
Table 6-7 600V output sharing choke ratings
6.3.1 Dual output sharing chokes
Table 6-8 400V dual output sharing choke ratings
Table 6-9 600V dual output sharing choke ratings
6.3.2 Cooling requirements for higher output
frequencies
Single OTL output sharing chokes - OTLX0X
Up to output frequencies of 300Hz, 1m/s airflow provides adequate
cooling.
Above 300Hz, the following equation must be used to calculate the
required airflow:
S = (f
0.75
/72)
Where:
S is the airflow in metres per seconds
f is the drive output frequency in Hz
Example:
Output frequency is 450Hz
S = (450
0.75
/72)
= 1.4m/s
Dual OTL output sharing chokes - OTLX1X
The OTLX1X dual output sharing choke core does not see the change in
drive output frequency as this choke is a current cancelling choke. Only
the drives switching frequency has an effect on the core loss.
Therefore motor frequency is not an issue until higher frequencies cause
high copper losses due to skin effect.
Therefore with the dual OTL chokes, only 1m/s airflow is required.
Maximum output frequency for OTL chokes
The maximum allowable output frequency for OTL output sharing
chokes, singles or duals, should be limited to 1000Hz.
Model
Current
A
Inductance
μH
Width
(W)
mm
Depth
(D)
mm
Height
(H)
mm
Weight
kg
Max ambient
temp
°C
Min
airflow
m/s
Required
SPM module
Part No.
OTL401 221 40.1 240 220 210 20 50 1 SPMA/D 14X1 4401-0197
OTL402 267 34 242 220 205 20 50 1 SPMA/D 14X2 4401-0198
OTL403 313 28.5 242 220 205 25 50 1 SPMD 14X3 4401-0199
OTL404 378 23.9 242 220 205 25 50 1 SPMD 14X4 4401-0200
Model
Current
A
Inductance
μH
Width
(W)
mm
Depth
(D)
mm
Height
(H)
mm
Weight
kg
Max ambient
temp
°C
Min
airflow
m/s
Required
SPM module
Part No.
OTL601 135 103.9 242 170 203 20 50 1 SPMA/D 16X1 4401-0201
OTL602 156 81.8 242 170 203 20 50 1 SPMA/D 16X2 4401-0202
OTL603 181 70.1 242 200 203 20 50 1 SPMD 16X3 4401-0203
OTL604 207 59.2 242 200 203 20 50 1 SPMD 16X4 4401-0204
The OTLX1X parallel output sharing chokes can only be used
when two Unidrive SPM drives are paralleled together. For all
other combinations the OTLX0X output sharing choke must
be used.
Model
Current
A
Inductance
μH
Width
(W)
mm
Depth
(D)
mm
Height
(H)
mm
Weight
kg
Max ambient
temp
°C
Min
airflow
m/s
Part No.
OTL411 390 42.8 300 150 160 8 50 1 4401-0188
OTL412 470 36.7 300 150 160 8 50 1 4401-0189
OTL413 551 31.1 300 150 160 8 50 1 4401-0192
OTL414 665 26.6 300 150 160 9 50 1 4401-0186
Model
Current
A
Inductance
μH
Width
(W)
mm
Depth
(D)
mm
Height
(H)
mm
Weight
kg
Max ambient
temp
°C
Min
airflow
m/s
Part No.
OTL611 238 110.4 300 150 160 8 50 1 4401-0193
OTL612 274 88.4 300 150 160 8 50 1 4401-0194
OTL613 319 76.7 300 150 160 8 50 1 4401-0195
OTL614 365 65.7 300 150 160 8 50 1 4401-0196
CAUTION

Emerson Unidrive SPM Specifications

General

Brand	Emerson
Model	Unidrive SPM
Category	Controller
Language	English