Connecting the motor cable, Connecting the dc power – ElmoMC SimplIQ Digital Servo Drives-Trombone DC User Manual
Page 29
DC Trombone Installation Guide
Installation
MAN-DCTROIG (Ver. 1.601)
29
3.6.3.
Connecting the Motor Cable
Connect the motor power cable to the M3, M2, M1 and the PE (Motor chassis) terminals of the
motor connector (see diagram below). The phase connection order is arbitrary because the
Composer will establish the proper commutation automatically during setup. However, if you
are willing to avoid from tuning each drive separately, and you plan to copy this setup file to
other drives – then, the motor-phase order, on all copy drives, must be kept the same as in the
first drive.
Note for connecting the motor cables:
1.
For best immunity, it is highly recommended to use a shielded (not twisted) cable for the
motor connection. A shielded cable consisting of four wires should be used. The gauge is
determined by the actual current consumption of the motor.
2.
Connect the shield of the cable to the closest ground connection at the motor end.
3.
Connect the shield of the cable to the PE terminal in the drive's motor-connector.
4.
Make sure that the motor chassis is properly grounded.
Figure 6: AC Motor Power Connection Diagram
3.6.4.
Connecting the DC Power
The DC power to the DC Trombone is delivered from a separated rectifying-unit (supplied by
the user). The following sections contain topology recommendations for implementing three-
phase and a single-phase supply chains. Elmo offers the end-user, the option to purchase its
Tambourine rectifier, which offers a range of versatile options.
The power-stage of the DC Trombone is fully isolated from other sections of the DC Trombone,
such as the control-stage and the heat sink. This isolation allows the user to connect the
common of the control-section to the PE, a connection which significantly contributes to
proper functionality, safety and EMI immunity, leading to a better performance of the DC
Trombone.
In addition, this isolation simplifies the requirements of the DC power supply that is used to
power the DC bus of the DC Trombone, by allowing it to operate with a non-isolated DC power
source (a direct-to-mains connection) eliminating the need for a bulky and expensive isolation-
transformer.