Connecting the dc power – ElmoMC ExtrIQ Digital Servo Drives-Eagle HV User Manual
Page 30
Eagle HV Installation Guide
Installation
MAN-EAG-HVIG (Ver. 1.502)
30
3.5.3.2.
Connecting the DC Power
The DC power to the Eagle HV 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.
The Power-stage of the Eagle HV is fully isolated from other sections of the Eagle HV, 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 Eagle HV.
In addition, this isolation simplifies the requirements of the DC power supply that is used to
power the DC bus of the Eagle HV, by allowing the operation with a non-isolated DC power
source, a direct-to-mains connection, eliminating the need for a bulky and expensive isolation
transformer.
However, the Eagle HV can operate from a non-isolated/direct-to-mains DC power supply, from
an isolated DC power supply, or from batteries.
When rectifying the AC voltage source, the AC voltage-level must be limited as follows:
Drive Model (V) AC voltage-level limit (VAC) DC Maximum (VDC)
400
270
390
700
477
680
800
528
747
3.5.3.3.
Direct-to-Mains Power Source (Non-Isolated Rectifier)
This paragraph represents power supply and drive, which are directly connected to the mains.
Notes for connecting the non-isolated DC power supply:
•
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.
•
Connect both ends of the cable shield to the closest PE connections.
•
Tie one end to the power supply’s PE terminal, and tie the other end either to one of the
four mounting screws of the drive’s heat sink-PE.
•
To close the power supply cable into the drive, use the barrel connector, M6 spring washer
and M6 nut (in the drive). The required torque is 3 to 4 Nm.
•
To close the PE wire into the drive, use the barrel connector, M6 flat washer, M6 spring
washer and M6 screw to the heat sink. The required torque is
3 to 4 Nm.