3 Product Overview
3.1 Introduction
The figure presents the block diagram of the VACON
®
NX inverter. The inverter mechanically consists of 2 units: the power unit and the
control unit.
The power unit contains an inverter bridge which consists of IGBT switches and produces a symmetrical, 3-phase PWM-modulated AC
voltage to the motor. To protect the DC-link capacitors, capability of DC-charging is required.
The motor and application control block is based on microprocessor software. The microprocessor controls the motor based on the
information it receives through measurements, parameter settings, control I/O, and control panel.
The motor and application control block controls the motor control ASIC which, in turn, calculates the IGBT positions. Gate drivers
amplify these signals for driving the IGBT inverter bridge.
U
V
W
B+
B-
Power
Supply
Measure-
ments
IGBT
bridge
Driver
Fan
Control
Unit
Power
Unit
Control
I/O
Slot A
I/O
Slot B
I/O
Slot C
I/O
Slot D
I/O
Slot E
ASIC
Control
Panel
e3
0b
h4
45
.1
0
Illustration 1: Block Diagram of VACON
®
NX Inverter
Product Overview
Operating Guide | VACON® NXI Inverters FI9-FI14
AQ304441431479en-000101 / DPD00909| 15
Danfoss A/S © 2019.11
Summary of Contents for VACON NXP FI10
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