ElmoMC Gold Line Digital Servo Drives-Gold Trombone User Manual
Page 43
Gold Trombone Installation Guide (EtherCAT and CAN)
Installation
MAN-G-TROIG-EC (Ver. 1.604)
43
The following sections contain topology recommendations for implementing three-phase and
single-phase supply chains.
The power stage of the Gold Trombone is fully isolated from the other sections of the Gold
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 better performance of
the Gold Trombone.
In addition, this isolation simplifies the requirements of the DC power supply that is used to
power the DC bus of the Gold Trombone, by allowing it to operate with a non-isolated DC
power source (a direct-to-mains connection) which eliminates the need for a bulky and
expensive isolation transformer.
However, as well as operating from a non-isolated/direct-to-mains DC power supply, the Gold
Trombone can also operate from an isolated power supply or batteries.
When rectifying an AC voltage source, the AC voltage level must be limited to 270 VAC so as
not to exceed the maximum 390 VDC in the case of a 400 VDC drive, or 528 VAC so as not to
exceed the maximum 747 VDC in the case of an 800 VDC drive.
4.7.2.1.
Direct-to-Mains Power Source (Non-Isolated Rectifier)
This section relates to the configuration of the power supply and drive, which are connected
directly to the mains.
To connect the non-isolated DC power supply:
1.
For best immunity, it is highly recommended to use twisted cables for the DC power supply
cable. A 3-wire shielded cable should be used. The gauge is determined by the actual
current consumption of the motor.
2.
Connect both ends of the cable shield to the closest PE connections.
3.
Tie one end to the power supply’s PE terminal, and tie the other end either to the PE pins
of the module/PE terminal of the integration board, or attach it to one of the four
mounting screws of the drive’s heat-sink.