Air conditioner inverter

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					Air conditioner inverter
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An inverter in an air conditioner is used to control the speed of the compressor motor to allow continuously regulated
temperature. By contrast, traditional air conditioners regulate temperature by using a compressor that is periodically either
working at maximum capacity or switched off entirely. Inverter-equipped air conditioners have a variable-frequency drive that
incorporates an adjustable electrical inverter to control the speed of the motor and thus the compressor and cooling output.
The variable-frequency drive uses a rectifier to convert the incoming alternating current (AC)
to direct current (DC) and then uses pulse-width modulation in an electrical inverter to
produce AC of a desired frequency. The variable freqeuncy AC drives a brushless motor or
an induction motor. As the speed of an induction motor is proportional to the frequency of
the AC, the compressors runs at different speeds. A microcontroller can then sample the                A comparison of temperature
                                                                                                      regulation between a traditional
current ambient air temperature and adjust the speed of the compressor appropriately. The
                                                                                                     air conditioner and an inverter air
additional electronics add to cost of equipment and operation. Conversion from AC to DC,                         conditioner
and then back to AC, can cost as much 4 - 6% in energy losses for each conversion
step. [citation needed]
Eliminating stop-start cycles increases efficiency, extends the life of components, and helps eliminate sharp fluctuations in the
load the air conditioner places on the power supply. Ultimately this makes inverter air conditioners less prone to breakdowns,
cheaper to run, and the outdoor compressor is generally quieter than a standard air conditioning unit's compressor. [1]

While at the beginning of the 1990s inverter air conditioners had some drawbacks,[2][clarification needed] these have been
mostly overcome [citation needed] - the conversion losses are lower and filters suppress most of the electromagnetic interference
generated in inverters. Running at full load, compressors deliver their best efficiency and outperform inverters. Inverter-based
air conditioners have their strengths in environments where a partial load is common, as they are significantly more efficient
than conventional air conditioners in those situations. For conventional households where each indoor unit is connected to a
single dedicated outdoor unit, inverters are the preferred option, as partial loading is the common mode there. [citation needed]
The higher initial expense is balanced by lower energy bills. [citation needed] In a typical setting the pay-back time is about two
years (depending upon the usage). [citation needed] For more modern installations where an outdoor unit is connected to
multiple indoor units there are better options also available.[clarification needed]

See also
    Variable refrigerant flow

References
   1. ^ Air Conditioning Explained , retrieved 16 May 2009
   2. ^ "Investigation Of Peak Electric Load Impacts of High SEER Residential HVAC Units"

External links
    Air conditioning FAQ
    How Digital Scroll Works


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