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As flight systems evolve
from traditional hydraulic, to electrically-controlled/hydraulically
powered, to electrically (or optically) controlled/electrically
powered, one of the key design requirements for
new power generation will
be the ability to provide high-quality power at variable frequencies.
An equally important requirement
will be for electrical equipment and systems to be able to utilize
the wide variable frequency
(or “Wild” frequency) of 350 to 800 Hz that is output by the
variable frequency generators.
In addition, ground support and test equipment capable of producing
and handling “Wild” frequencies
will be required.
Read the article in January 2007 Avionics
magazine titled:
Perspectives: "Wild" Frequency must move toward
wide acceptance
See the results of the survey:
Electrical Power trends in the military and
civilian aircraft industry
Questions from readers with answers
from our wild frequency experts
What
exactly is wild frequency?
Mike T. MT
I
thought 400 Hz was the AC standard on all aircraft?
Jim W. OH
What
will happen to all the existing avionics that are powered from
115VAC, 400Hz?
Peter R. NY
Is
there any equipment presently being manufactured that works at
the wild frequency?
Gary V. PA
Are
there any MIL Specs for wild frequency requirements?
George B. CA
Information and products regarding
wild frequency
High-Performance
Front-End Converter for Avionics Application
This paper presents analysis,
modeling, and design of a low-harmonic, isolated, active-clamped
SEPIC rectifier for future avionics applications. Simpler
converter dynamics, high switching frequency,
zero-voltage-switching, and a
single-layer transformer construction result in an efficiency of
90% and
a very low harmonic distortion
over 400-800 Hz line frequency variation.
Questions and
answers on "Origin of 400 Hz in aircraft"?
Demonstration
of Very High Power Airborne AC to DC Converter
This paper describes the challenges
inherent in developing high power (>100kW) AC-DC converters
for aerospace applications. Various technologies and topologies
were considered, analyzed and rated,
with an optimum design being
chosen. Details regarding power quality, magnetics design, and
thermal management are discussed. Performance results from
demonstration hardware are provided, including
power quality, regulation,
efficiency (98%) and temperature results.
End of the
circuit breaker: smart power makes its mark
Computer control of power distribution
on aircraft and other integrated platforms is helping systems
integrators improve reliability, safeguard sophisticated electronics
from power spikes, and protect
not only aircraft and other
expensive military and aerospace systems, but also the men and
women
who operate them. An AIRINC
429 Tutorial
SAE AE-7 Committee
Minutes 29 April-1 May 2003
SAE AE-7 5 year document review
list. A 5-year review of AS 8023 is required. The committee needs
to get a handle on which SAE
documents are in active use. Only keep 5-year review for active
document. Discussion on AS
1212 Electric Power Systems, Characteristics vs. MIL STD 704:
704 is accepted as is DO-160. Has AS 1212 lost its importance?...
Some questions
about " MAGNESIUM OVERCAST- The story of the Convair B-36"
by Dennis R.
Jenkins
For members
of IEEE
High-power
variable frequency generator for large civil aircraft
Fault tolerant,
variable, unity power factor converters for aircraft power systems
Converter enhanced
variable frequency power bus architecture
Unity power
factor power supply for use with variable frequency power
Aircraft power
supply 400 Hz and beyond
The role of
avionics in the all electric airplane
Available for purchase from
the Electronic Library of AIAA
Personnel Licensing
Advisory Circular
Aircraft Maintenance Technician
Licenses Type Ratings
Goodrich On
Board A400M
Airbus has selected Goodrich
Corporation to supply the flap actuation package for its military
transport aircraft,....
Data Recording
Products
A wide range of data recording
products with power test capability to 800 Hz
Anti-Collision
Light System
Anti-collision light system
based on LED technology that operates on 115 VAC form 360-800
Hz
Hi-Rel AC/DC
Module
Active Power Factor Corrected
over variable frequency 360-800 Hz
Airline Control
Boxes
Can drive up to 10 standard
actuators, up to 16 BUS actuators...power supply frequency 360-800
Hz
Ice Protection
Systems
Products ranging from ice protection
systems, both anti-icing and de-icing, to avionic systems
and system monitoring equipment.
Technologies include wild frequency.
