Start-up
19
Multimotor drives
Ie, more than one motor is connected to one drive.
Check that the motors have the same relative slip (only for
asynchronous motors), nominal voltage and number of poles. If the
manufacturer motor data is insufficient, use the following formulas to
calculate the slip and the number of poles:
where
p
= number of pole pairs (= motor pole number / 2)
f
N
= motor nominal frequency [Hz]
n
N
= motor nominal speed [rpm]
s
= motor slip [%]
n
S
= motor synchronous speed [rpm].
Set the sum of the motor nominal currents.
Set the nominal motor frequencies. Frequencies must be the same.
Set the sum of the motor nominal powers.
If the motor powers are close to each other or the same but the
nominal speeds vary slightly, parameter
be set to an average value of the motor speeds.
External control unit power supply
If the control unit of the drive is powered from an external power
supply (as specified in
Hardware Manual)
, set parameter
to EXTERNAL 24V.
External mains choke
If the drive is equipped with an external choke (specified in
Hardware
Manual)
, set parameter
Motor overtemperature protection (1)
Select how the drive reacts when motor overtemperature is detected.
Select the motor temperature protection: motor thermal model or
motor temperature measurement. For motor temperature
measurement connections, see section
on
page
.
s
n
S
n
N
–
n
S
------------------
100%
⋅
=
n
s
f
N
60
⋅
p
----------------
=
p
Int
f
N
60
⋅
n
N
---------------
=
Summary of Contents for ACSM1 Series
Page 1: ...ABB motion control drives Firmware manual ACSM1 motion control program ...
Page 4: ......
Page 34: ...Drive programming using PC tools 34 ...
Page 86: ...Drive control and features 86 ...
Page 265: ...Parameters and firmware blocks 265 1 100 us 100 µs 2 1 ms 1 ms 3 50 ms 50 ms ...
Page 302: ...Parameter data 302 ...
Page 422: ...Application program template 422 ...
Page 430: ...Appendix A Fieldbus control 430 ...
Page 500: ...Appendix D Application examples 500 ...
Page 508: ...Appendix E Control chain and drive logic diagrams 508 ...
Page 510: ...3AFE68848270 REV H EN 2015 06 26 Contact us www abb com drives www abb com drivespartners ...