AIRPLANE
OPERATIONS
MANUAL
POWERPLANT
REVISION 41
2-10-40
Page
1
Code
01
Copyright © by Embraer. Refer to cover page for details.
POWERPLANT CONTROL SYSTEM
Each AE 3007A engine series features a dual redundant electronic
control system. The main components of the powerplant control
system are the Full Authority Digital Electronic Controls (FADECs), the
FPMU, the Permanent Magnetic Alternator (PMA), the Control
Pedestal and the Powerplant Control Panel.
Thrust management logic schedules a corrected fan speed (N1) based
on a signal from the ADC and cockpit, sending it to engine control
logic, which controls the engine fuel flow and compressor variable
geometry (CVG) to attain the required engine steady-state and
transient response.
Engine control logic also incorporates engine protection logic that
prevents engine damage attributable to excessive rotor speed at all
times, and temperature limits after the engine has completed a start.
FULL AUTHORITY DIGITAL ELECTRONIC CONTROL
(
FADEC)
Each engine is controlled by one of two FADECs that are named
FADEC A and FADEC B. All signals between each FADEC and its
respective engine and between the FADECs and the airplane are
completely redundant and isolated. This allows either A or B FADEC to
control the engine independently.
The FADECs are interconnected by dedicated Cross-Channel Data
Links. These buses are used to transmit engine data and FADEC
status between the two FADECs.
Each FADEC is connected to one of the two FADECs on the opposite
engine via data bus. Across this bus, the FADECs communicate the
information necessary to implement thrust reverser interlock and
Automatic Takeoff Thrust Control System (ATTCS).
Airplane electrical power is fed to the FADEC for engine start as a sole
power source until N2 is approximately 50%. Primary electrical power
source for each FADEC is generated by a dedicated set of windings in
the permanent magnet alternator (PMA). The airplane power source is
fed the FADEC as a backup in the event of a failure in the PMA. In the
event of total loss of airplane power the pilot would control the engine
normally.
To Next Page
Loading...
