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- Power_processing_unit abstract "Power processing units (PPUs) are circuit devices that convert an electricity input from a utility line into the appropriate voltage and current to be used for the device in question. They serve the same purpose as linear amplifiers, but they are much more efficient, since the use of linear amplifiers results in much power loss due to the use of a resistor to change the voltage and current. Instead of using a resistor, PPUs use switches to turn a signal on and off quite rapidly in order to change the average current and voltage. In this way, they could be conflated with dc-ac converters, but the frequency at which they switch the signal on and off is a few orders of magnitude higher than that of ac signals. They are used to convert the current and voltage of both dc and ac signals.SpacecraftIn the context of spacecraft, the power processing unit (PPU) is a module containing the electrical subsystem responsible for providing electrical power to other parts of the spacecraft. The PPU needs to be able to cope with varying demands for power output and provide that power in the most efficient manner possible.There are two main constrains placed on PPU: Power generation from for instance a solar array or radioisotope thermoelectric generator where power generation can vary based on external conditions. Power utilization which varyies depending of the current internal activities performed by the spacecraft such as burst radio transmission or external demand factors like outside temperature and the need to provide heat to maintain constant internal temperature.Major considerations in building PPUs are weight, size and efficiency.Most PPUs process and supply direct current because that is what is generated by a solar array.The PPU is also responsible for voltage conversion and supplying the required voltage to other subsystems of the spacecraft.".
- Power_processing_unit wikiPageID "19757640".
- Power_processing_unit wikiPageRevisionID "555056207".
- Power_processing_unit hasPhotoCollection Power_processing_unit.
- Power_processing_unit subject Category:Electrical_engineering.
- Power_processing_unit subject Category:Spacecraft_components.
- Power_processing_unit type Abstraction100002137.
- Power_processing_unit type Cognition100023271.
- Power_processing_unit type Component105868954.
- Power_processing_unit type Concept105835747.
- Power_processing_unit type Content105809192.
- Power_processing_unit type Idea105833840.
- Power_processing_unit type Part105867413.
- Power_processing_unit type PsychologicalFeature100023100.
- Power_processing_unit type SpacecraftComponents.
- Power_processing_unit comment "Power processing units (PPUs) are circuit devices that convert an electricity input from a utility line into the appropriate voltage and current to be used for the device in question. They serve the same purpose as linear amplifiers, but they are much more efficient, since the use of linear amplifiers results in much power loss due to the use of a resistor to change the voltage and current.".
- Power_processing_unit label "Power processing unit".
- Power_processing_unit sameAs m.04q2g8w.
- Power_processing_unit sameAs Q17105340.
- Power_processing_unit sameAs Q17105340.
- Power_processing_unit sameAs Power_processing_unit.
- Power_processing_unit wasDerivedFrom Power_processing_unit?oldid=555056207.
- Power_processing_unit isPrimaryTopicOf Power_processing_unit.