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UPS system

I am reading up on UPS systems and came across a system which had both rectifier and a converter in it . My question is if a rectifier converts AC to DC and so does a converter what is the difference between the 2 devices ?
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  • A rectifier always takes an AC and makes a DC - usually with various arrangements of diodes.

    An inverter takes a DC and chops it to make an AC, albeit a sine wave of varying lumpiness made by sticking together rectangles

    A converter could be either of the above or even both.

    beware the English
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  • A rectifier always takes an AC and makes a DC - usually with various arrangements of diodes.

    An inverter takes a DC and chops it to make an AC, albeit a sine wave of varying lumpiness made by sticking together rectangles

    A converter could be either of the above or even both.

    beware the English
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