Replacing a Servo Motor & Drive with AC Motor and Inverter.

Dear Friends,

We have a Corrugator Machine (110Meters long) in our plant for producing Corru-wall sheets which then convert into boxes through other Machines. This machine produces sheets with 5 paper reels. If the paper on one of any running reel is end, there is a SPLICER unit which splices the tail of running reel with next reel without any stoppage. Thus we have 5 Splicer units for 5 paper reels. These Splicers are the back bone of any Corrugator machine as if these are not correct functioning, operator have to stop the machine and manually joint the tail of ending reel with next reel which is caused by increasing the waste of paper.

We have two servo motors with servo motor drives in each Splicer which detail is as following;

Drive ABB
AC Servo Motor Drive, 12.4KVA, 19A, 400V, 3phase
Type Bivector 535 "18" Ser# 00128-04

Servo Motor ABB with Resolver
Type 8C543000V002SN3MB Ser# BS024019

3Phase AC PM Synchronous Servo motor
V = 347
Const Stall Torque = 30Nm 17.8Arms
Peak Stall Torque = 105Nm 69.3Arms
Speed = 300RPM.

ABB has stopped the production of above servo motor drive for a long time. These drives frequently malfunction and I want to replace them.

During normal operation, only one motor for "Dancer Roll 2U1" works and controls the tension of web. The second motor (2U2) is coupled with "Reel Launch Roller" through timing belts, works only during Splice sequence. During normal operation, paper, passes on this roller, rotates it (and the rotor of motor too) with its speed and PLC calculates the speed of web through an Encoder coupled with this roller. First, I want to change this motor with simple AC motor and Inverter. The operation of this motor during splice sequence is as following;

When the paper on running reel over and operator pushes "Splice" button, PLC immediately stops the motor 2U2 (through its drive) and after completion of "Splice" sequence (1.5sec), PLC sends the 0-10V signal to the drive of 2U2 and it rapidly accelerates exactly at the speed where it stopped. With the stopping and rapidly accelerating Reel Launch Roller, system calculates the 0-10V signal for an E/P regulator which sends 0-5bars to the brake cylinders of paper reel for a positive splice without breaking the paper or paper joint.


My questions are

1) Is it possible to replace this servo motor and drive with AC motor and Inverter?
2) What should be the KW of motor?
3) Would AC motor stall the rotating Reel Launch Roller (with Dynamic Braking) immediately if it is running at high speed?
4) Would AC motor rapidly accelerate the roller?

Under above mentioned conditions, kindly help me so that I would be able to start my working with a positive direction.