Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 357)

Rockwell Automation Publication 750-RM002B-EN-P - September 2013 357
Integrated Motion on the EtherNet/IP Network Applications for PowerFlex 755 AC Drives Chapter 6
Supported Motors The PowerFlex 755 can be used with a variety of both induction and permanent
magnet (PM) motors.
AC Induction Motors
An AC induction motor uses slip between the rotor and the stator to create
torque. Some motor manufacturers specify the synchronous speed instead of slip
speed on the motor nameplate. For example, a 4 pole, 60 hertz motor has a
synchronous speed of 1800 rpm. The drive algorithm cannot use the
synchronous speed, it needs the slip rpm. The slip rpm is the rotor speed when
the stator is at rated frequency and the motor is at full load. The rotor slips
behind the stator to create the torque. For a 4 pole, 60 hertz motor the slip rpm
range is 1700…1790 rpm. If the nameplate is showing synchronous speed (in our
example 1800 rpm), please contact the motor manufactures to receive the slip
rpm.
Some AC motors have two voltage ratings, a high voltage and a low voltage.
Follow the motor manufacture's wiring diagram to correctly wire the motor for
the proper voltage.
All motor manufactures provide an electrical specification including an electrical
model equivalent. If you believe that the PowerFlex drive family is not producing
the correct motor torque, please contact the motor manufacturer to receive the
electrical specification prior to contacting Rockwell Automation Technical
Support.
This list contains the name of manufacturers that produce motors that are
recommended for use with PowerFlex 755 drives.
Manufacturer Notes
Baldor Electric Company Work well with PowerFlex 755 drives.
Baumuller Work well with PowerFlex 755 drives.
Elin Work well with PowerFlex 755 drives.
Electrical Apparatus Company (EAC) Induction motors work well with PowerFlex 755 drives.
Lenze Some Lenze motors have been stamped with synchronous speed versus slip
speed. Please contact Lenze to get the slip speed.
Marathon Electric Work well with PowerFlex 755 drives. Marathon stamps all pertinent
information on their nameplate including electrical model equivalent.
Reliance RPM AC motors are used in industry and work well with PowerFlex 755 drives.
Reuland Electric Company, Inc. Work well with PowerFlex 755 drives. Reuland stamps the motor with
synchronous speed and then supplies the slip frequency. You must calculate
the slip frequency in rpm and then subtract the slip rpm from the synchronous
speed to get the slip speed. Before contacting Rockwell Automation Technical
Support, please obtain the electrical specification sent with the motor.
Rockwell Automation 8720 and HPK motors work well with PowerFlex 755 drives. See the
appropriate motor manual for the proper nameplate voltage.
SEW-EURODRIVE SEW-EURODRIVE gear motors are widely used in industry and work well with
PowerFlex 755 drives. Some of the older motors were stamped with
synchronous speed versus slip speed. Please contact SEWS if the motor is
stamped with synchronous speed. If you are using an SEW motor with an
integral brake, please verify that the brake is properly suppressed for noise.