52
Kollmorgen - December 2011
MMC Smart Drive Hardware Manual
-
SYSTEM POWER DEVICES
Calculations are multiplied by a factor to compensate for the power and loss elements
within a power system. A factor of 2.0 is used with a single phase system and a factor
of 1.5 is used with a three phase system. This factor should minimize the effects of the
secondary line voltage sagging in the transformer during peak current periods.
The speed/torque curve information for 230V motors is based upon a drive input
voltage of 230V AC. For a 115V AC input voltage, the maximum speed can be
reduced up to one half.
Example single phase Formula:
Example three phase Formula:
4.5
External Shunts
Power from the motor is returned to the MMC Smart Drive during motor deceleration.
Excessive power may have to be dissipated from the MMC Smart drive when large
inertia loads are present. External shunts should be used to avoid excessive bus over
voltage faults.
This section covers three aspects of External Shunts:
•
Refer to
for information on choosing External Shunts.
•
Refer to
for information on mounting External Shunts
•
Refer to
for information on connecting External Shunts
4.5.1
Choosing External Shunts
This section describes how to select the proper External Shunt based on system
parameters.
Kollmorgen recommends you use the Motion Solutions Sizing Software to determine
the need for and type of external shunt. However, you may perform the following
calculations to choose the external shunt for your application.
1.
Obtain the Peak Generating Power for the drive in watts (W).
2.
Perform the following calculation:
NOTE
For 460V drives, the 3-Phase source powering the drive has to be a center-
grounded “Y” configuration. Do not exceed 304 Volts RMS from any phase
to ground.
For 220V drives, the 3-Phase source powering the drive does not have to be
a center-grounded “Y” configuration. Do not exceed 152 Volts RMS from any
phase to ground.
KVA
Speed RPM
(
)
Torque lb
in
–
(
)
⋅
63 025
,
------------------------------------------------------------------------------
0.746
KVA
⋅
HP
------------------------------ 2.0
⋅
⋅
=
KVA
Speed RPM
(
)
Torque lb
in
–
(
)
⋅
63 025
,
------------------------------------------------------------------------------
0.746
KVA
⋅
HP
------------------------------ 1.5
⋅
⋅
=
Содержание Digital MMC Control
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Страница 10: ...8 Kollmorgen Decamber 2011 MMC Smart Drive Hardware Manual TABLE OF CONTENTS...
Страница 14: ...12 Kollmorgen December 2011 MMC Smart Drive Hardware Manual INTRODUCTION TO THE MMC SMART DRIVE...
Страница 128: ...126 Kollmorgen December 2011 MMC Smart Drive Hardware Manual 230V 1 3 PHASE MMC SMART DRIVE...
Страница 214: ...212 Kollmorgen December 2011 MMC Smart Drive Hardware Manual 460V 3 PHASE MMC SMART DRIVE...
Страница 246: ...244 Kollmorgen December 2011 MMC Smart Drive Hardware Manual MOTOR CABLES CONNECTORS...
Страница 296: ...294 Kollmorgen December 2011 MMC Smart Drive Hardware Manual DRIVE RESIDENT DIGITAL MMC CONTROL...
Страница 297: ...Kollmorgen December 2011 295 MMC Smart Drive Hardware Manual DECLARATIONS OF CONFORMITY 13 Declarations of Conformity...
Страница 298: ...296 Kollmorgen December 2011 MMC Smart Drive Hardware Manual DECLARATIONS OF CONFORMITY...
Страница 299: ...Kollmorgen December 2011 297 MMC Smart Drive Hardware Manual DECLARATIONS OF CONFORMITY...
Страница 300: ...298 Kollmorgen December 2011 MMC Smart Drive Hardware Manual DECLARATIONS OF CONFORMITY...
Страница 301: ...Kollmorgen December 2011 299 MMC Smart Drive Hardware Manual DECLARATIONS OF CONFORMITY...
Страница 302: ...300 Kollmorgen December 2011 MMC Smart Drive Hardware Manual DECLARATIONS OF CONFORMITY...
Страница 320: ...MMC Smart Drive Hardware Manual INDEX 318 Kollmorgen March 2011...
Страница 322: ...320 Kollmorgen December 2011 MMC Smart Drive Hardware Manual SALES AND SERVICE...