Gating; Operating Principle; Description Of The Components; Sinamics Control Unit - Siemens SINAMICS GM150 Operating And Installation Instructions

Description

3.4 Operating principle

3.3.4

Gating

The PowerCards are interconnected via a low-inductance busbar, which results in a three-level
phase configuration for a voltage DC link drive. The gating boards are fitted directly onto the
IGBT modules, thereby ensuring a compact design and a high level of interference immunity.
The power semiconductors are connected through the gating boards. The gating command is
transmitted from the power stack adapter (PSA) to the gating board via a plastic fiber-optic
cable connection.
3.4 Operating principle
A constant DC-link voltage for the Motor Module is generated from the line voltage. The Motor
Module provides the power for the connected motor via the DC-link voltage.
The DC link capacitors smooth the voltage and stop the energy in the DC link. The DC link
capacitors are maintenance free and self-healing. The drive is switched off when the circuit-
breaker is disconnected. The DC link is discharged by means of balancing resistors.
3.5

Description of the components

3.5.1

SINAMICS Control Unit

The CU320-2 DP Control Unit is the central control module of the drive's open-loop and closed-
loop control system. The connections are wired internally to the customer terminal block.
Further information is available in the following documents:
● You will find information on the wiring in the circuit manual in the "Technical specifications
● You can find information on the interfaces and LEDs in the "Supplementary component
See also
Technical data and drawings (Page 233)
3.5.2

Terminal Modules

The Terminal Modules are the central interface for digital and analog inputs and outputs. You
can optionally expand the interface to include additional Terminal Modules.
36
and drawings" appendix.
descriptions" document.
SINAMICS GM150 6SL3815-2LN41-4AA2
Operating Instructions 04/2017