NGPS – User’s Manual
13
Table 1b:
Customized NGPS models
The NGPS units are available in three different values of nominal three-phase
input voltage:
Version
Three-Phase Input
“A”
208 V (AC)
“E”
400 V (AC)
“U”
480 V (AC)
Table 2:
NGPS versions
The NGPS module is composed of a single 19-inch standard crate. The power
unit implements a completely digital control loop, with a Pulse Width Modulation
(PWM) generation technique that allows adapting the system to any load condition.
The control board houses a dedicated FPGA with an integrated dual-core ARM
CPU. The loop regulation task is performed directly by the FPGA logic, in order to
have high performance and deterministic loop control. On the ARM CPU it is installed
an embedded Linux OS, that supervises all processes as communication, diagnostics
and local interface handling.
Remote communication is guaranteed by means of an Ethernet 10/100/1000
autosensing socket, mounted on the front panel of the power unit. The power supply
can be also monitored and controlled via a graphic high-resolution color display
featuring user-friendly menus and a navigation switch for moving within them.
In addition to the standard Ethernet interface, it is possible to communicate with
the unit using the SFP-ports on the front panel. This interface allows to communicate
with the unit using a proprietary packet structure with a very high updating rate (more
than 10 kHz). These ports are connected directly to the FPGA logic, allowing the given
packet to be elaborated directly by the hardware logic.
This approach eliminates the software stratification that manages the packet and
the computational time is smaller and deterministic, allowing a very high updating rate
of the setpoint, giving the user more flexibility and excellent rates for the digital control
of the power supply.
NGPS-CMD 400-25E
400
25
10
NGPS-CMD 300-36E
300
36
10.8
