MT-30
Installation, Operation & Maintenance
06225-03H.doc
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AeroVironment, Inc
2.0 System Description
2.1 System Block Diagram
The MT-30 architecture is shown in the following system block diagram (Figure 2.1).
The AC Inverter connects to the utility via an isolation transformer. The DC Converter
and AC Inverter transfer power via an Intermediate DC Bus and communicate via an
RS-485 data bus. The DC Converter also communicates to the MT-30 Remote
Operation System via an RS-232 data link. The DC Converter provides the DC
interface to a load (or possibly two separate loads) in one of two operating modes.
Figure 2.1. MT-30 System Block Diagram
2.1.1 AC Inverter Functions & Controls
The AC Inverter interfaces the utility to an internal Intermediate DC Bus. The
Intermediate DC Bus is regulated by the AC Inverter based on the maximum
voltage expected by the DC Converter connected. The Intermediate DC Bus is
250 Volts DC.
Circuitry designed into the AC Inverter monitors the utility to detect any
abnormalities. This is accomplished by measuring the frequency and amplitude
of the utility and verifying that it remains within the specified range given in the
Technical Specifications.
The AC Inverter operates under current control instead of the more common
phase control. This allows for a more robust interface to the utility and linear
response in the inverter dynamics.
AC
Inverter
Unit
MT-30
DC
Converter
Unit
Intermediate DC Bus
Load A
Load B
Optional Data Collection Systems:
•
SmartGuard
®
•
National Instruments NIDAQ
•
Custom
Isolation
Transformer
RS-232
Utility Interface
RS-485
ROS PC
HV Interlock A
High Voltage Interlock B
