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Common DC configurations 

Introduction 

ACSM1 drive modules can be connected via DC terminals together to have so 

called common DC configuration. Within common DC the drives with 

regenerative power from motor can feed via DC link the other drives, which are 

on motoring mode. Major benefits with this kind of connection are the following: 

  Energy saving due to reduced need for the supply side power. In 

optimum case there is also no need for braking resistors, if 

simultaneous regenerative power is not higher than motoring power. 

  DC link energy storage can be used for short dynamic braking energy 

pulses to avoid need for external braking resistor. 

  Braking energy can be handled with one unit even if several drives are 

at the same time in regenerative mode. However, several units with 

active braking chopper can be used simultaneously with braking 

resistor if needed. 

  Possibility for one AC input connection. The selected unit is, 

additionally to its own axis power, feeding also other drives connected 

to common DC. 

 

Summary of Contents for ACSM1 Series

Page 1: ...ACSM1 System Engineering Manual...

Page 2: ...2...

Page 3: ...3 ACSM1 04 Drive Modules System Engineering Manual 3AFE 68978297 REV A EN EFFECTIVE 08 10 2007 PDM Vault ID 00579251 2007 ABB Oy All rights reserved...

Page 4: ...4...

Page 5: ...when input power is not applied to the drive externally supplied control circuits may carry dangerous voltages Always ensure by measuring that no voltage is actually present A rotating permanent magn...

Page 6: ...erage regenerative power Pgen ave 13 Peak regenerative power Pgen max 13 Supply unit selection 14 DC link power supplied via ACSM1 14 Single AC input 14 Multiple AC input 14 Checking the charging capa...

Page 7: ...s 27 General system design items 28 Fuse protection 28 Selection of AC supply fuses 28 Selection of DC connection fuses 29 EMC 30 Installation 30 Drive module settings 30 General technical data 31 ACS...

Page 8: ...l schematic symbols This manual is written for readers worldwide Both SI and imperial units are shown wherever appropriate Categorization according to the frame size Some instructions technical data a...

Page 9: ...um case there is also no need for braking resistors if simultaneous regenerative power is not higher than motoring power DC link energy storage can be used for short dynamic braking energy pulses to a...

Page 10: ...total motoring power Average and maximum total regenerative power Select the drive module s to be connected to the AC supply Single AC input Multiple AC input Charging capacity Select the mains choke...

Page 11: ...DC power level for input bridge and DC connection terminals during 1 s ACSM1 04xx Prec ave Prec max Size Frame kW kW 02A5 4 A 3 5 4 4 03A0 4 A 3 5 4 4 04A0 4 A 3 5 4 4 05A0 4 A 3 5 4 4 07A0 4 A 4 7 5...

Page 12: ...er because it covers also the losses in the ACSM1 and motor Pdc DC link power keff Efficiency factor 1 eff to include ACSM1 and motor losses If not known value 1 25 can be used Pm Motor mechanical sha...

Page 13: ...pply if many axes are accelerated simultaneously Average regenerative power Pgen ave Pgen ave is the average of the regenerating DC link power over the whole cycle This power must be dissipated in bra...

Page 14: ...e conditions can not be fulfilled either a drive module with higher Prec ratings can be selected if feasible or a multiple AC input configuration can be used Multiple AC input In case two or more driv...

Page 15: ...g table ACSM1 04xx R Rmin Size Frame ohm ohm 02A5 4 A 50 21 7 03A0 4 A 50 21 7 04A0 4 A 50 21 7 05A0 4 A 50 21 7 07A0 4 A 50 16 5 09A5 4 B 130 14 7 012A 4 B 130 10 4 016A 4 B 130 10 4 024A 4 C 66 8 5...

Page 16: ...ondition must be fulfilled Rtot Rmin Charging current Typical AC input line current waveform and the DC link voltage during the charging is shown in the figure below It must be checked that the AC sup...

Page 17: ...regenerative power should be fed back to the AC supply Then it is possible to use ABB s regenerative supply units ISU There is no need for an external charging circuit with the external DC supply bec...

Page 18: ...ic distortion to balance the supply current in multiple AC input Mains choke data Data for the mains chokes is given below Type L Ith Imax H A A CHK 01 6370 4 2 6 2 CHK 02 4610 7 6 11 4 CHK 03 2700 13...

Page 19: ...where the total motoring line current is allocated to the individual drive modules according to their power ratings ave mot aven rec ave rec ave rec i ave rec i ave mot I P P P P I 2 1 20 1 max mot n...

Page 20: ...CHK xx are used according to default selection Then typically also the requirements for harmonic distortion according to standards IEC 61000 3 2 IEC 610003 4 and IEC 610003 12 are fulfilled A more ac...

Page 21: ...nt only resistor braking can be used with ACSM1 drive modules However it is also possible to use a suitable external supply unit which can feed the energy back to network so called regenerative supply...

Page 22: ...060A 4 D 1340 073A 4 D 2000 090A 4 D 2000 Energy capacity in common DC The energy capacity Wdc in the common DC system can be determined with following way 2 2 3 2 1 2 dc lim dc dcn dc dc dc DC U U C...

Page 23: ...h ACSM1 DC voltage limits Absolute maximum limit is defined according to the DC overvoltage trip limit including some safety margin 840 lim dc U V DC DC over voltage control is enabled but not activat...

Page 24: ...opper data of ACSM1 drive modules is shown in the following table ACSM1 04xx Pbr cont Pbr max Rbr min Size Frame KW KW Ohm 02A5 4 A 0 9 5 5 120 03A0 4 A 1 3 5 5 120 04A0 4 A 1 8 5 5 120 05A0 4 A 2 6 5...

Page 25: ...er Pbr ratings can be selected if feasible or a multiple braking chopper configuration can be used Multiple braking choppers In case two or more braking choppers of drive modules are active in the com...

Page 26: ...ulations the value of Udc is 840V DC max gen dc br min P U R R 2 The selected braking resistor should be able to handle the braking energy generated in fast dynamic situations time is just few seconds...

Page 27: ...elected braking resistors should be able to handle the braking energy generated in fast dynamic situations time is just few seconds i R gen cont br cont br i cont br E dt P P P P 2 1 where ER i is the...

Page 28: ...he single drive configuration can be found in the ACSM1 hardware manual That selection guideline can be used when the AC supply line current of the drive module s connected to AC supply is according t...

Page 29: ...he individual drive module Udc is the actual DC link voltage ac dc U U 35 1 The factor 1 6 covers the influence of cyclic load and ambient conditions If the average DC current Idc ave is not exactly k...

Page 30: ...les to meet different EMC categories are not yet available Installation Please see ACSM1 hardware manual for the installation mechanical and electrical guidelines of the drive modules and external opt...

Page 31: ...Over voltage control limit Udc ovc V 810 810 150 Udc DC voltage control Under voltage control limit Udc uvc V 400 70 dc U 400 74 Udc DC over voltage trip limit Udc ovt V 880 880 163 Udc DC under volt...

Page 32: ...control of DC link voltage level are enabled as default Then ACSM1 drive modules will limit motoring and generating torque if needed to keep DC link voltage within control limits In common DC configur...

Page 33: ...33...

Page 34: ...34 ABB Oy AC Drives P O Box 184 FIN 00381 HELSINKI FINLAND Telephone 358 10 22 2000 Fax 358 10 22 22681 Internet http www abb com 3AFE 68978297 REV A EN EFFECTIVE 08 10 2007...

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