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The AC EmPower system converts aircraft 400 Hz AC or wild frequency power to standard 60 Hz AC to prevent additional stresses in laptop chargers already stressed by reduced cooling at altitude. Laptops on this system will still charge batteries.
Survival radio, operates in Very High Frequency (VHF) and Ultra high frequency (UHF) aircraft bands. Replaced by AN/PRC-149: AN/PRC-113: Portable Very High Frequency (VHF)/Ultra high frequency (UHF) AM combat radio transceiver: Magnavox: AN/PRC-117: Falcon® portable, tactical software-defined combat-net radio
MIL-STD-704 Aircraft Electrical Power Characteristics is a United States Military Standard that defines a standardized power interface between a military aircraft and its equipment and carriage stores, covering such topics as voltage, frequency, phase, power factor, ripple, maximum current, electrical noise and abnormal conditions (overvoltage and undervoltage), for both AC and DC systems.
CCVs are used for driving mine hoists, rolling mill main motors, [4] ball mills for ore processing, cement kilns, ship propulsion systems, [5] slip power recovery wound-rotor induction motors (i.e., Scherbius drives) and aircraft 400 Hz power generation. [6] The variable-frequency output of a cycloconverter can be reduced essentially to zero.
Often airplanes use 400 Hz power so a 50 Hz or 60 Hz to 400 Hz frequency converter is needed for use in the ground power unit used to power the airplane while it is on the ground. Airlines might also utilize the converters to provide in-air wall current to passengers for use with laptops and the like.
Aircraft often use 400 Hz power internally, so 50 Hz or 60 Hz to 400 Hz frequency conversion is needed for use in the ground power unit used to power the airplane while it is on the ground. Conversely, internal 400 Hz internal power may be converted to 50 Hz or 60 Hz for convenience power outlets available to passengers during flight.
Identification of friendly aircraft is aided by identification friend or foe (IFF) interrogation. The system can be deployed using HMMWV fitted with a 10 kW 400 Hz 115/200 VDC on-board power generator. It can be operated autonomously and communicate with the fire direction center via wideband fiber-optic link.
Frequency conversion may refer to different processes affecting frequency of physical phenomena: A frequency changer , an electronic device that converts alternating current (AC) of one frequency to alternating current of another frequency