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Thread: Lithium Ion UPS

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  1. #1
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    Holy crap. They did it.

    Originally it was just that tiny little desktop UPS, but this thing is a monster.

    Glad its pure sine wave, but a little disappointed that at this price it's line interactive.

    At least the switch over time is only 10ms. A quality PSU shouldn't flinch.

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    You prefer on-line?

    Much more energy wasted and reduced reliability as the equipment is working 24/7

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    Quote Originally Posted by ashiekh View Post
    You prefer on-line?

    Much more energy wasted and reduced reliability as the equipment is working 24/7
    Yes. I know how an online UPS works.

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    Didn't mean to be patronizing, but maybe some others here don't know;
    I'm the first to admit, I don't really understand a lot.

    I ran a ferrups, till I realized how much it was costing me in electricity.

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    Quote Originally Posted by ashiekh View Post
    Didn't mean to be patronizing, but maybe some others here don't know;
    I'm the first to admit, I don't really understand a lot.

    I ran a ferrups, till I realized how much it was costing me in electricity.
    Newer converters, just like with newer power supplies, are more efficient. So the added power consumption shouldn't be too high.

    Using an on-line UPS removes doubt since there's no switch over time.

    When I used to install Avaya IP Office PBX equipment, I once used a CyberPower 1500VA line interactive to keep the system up. It's a very good UPS by all accounts. But the different modules in the rack had varying hold up times. If one module went down, your whole system might as well go down. And IP Office takes a long time to reboot (about two to three minutes... which seems like a lifetime when you have 200+ users in a call center that can't use their phones!!!)

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    now online ups dont waste too much power like before. they improve efficiency of double/delta conversion topology day by day
    ex my APC SURT 2k and 5k efficiency around 8x% in full load. but new SRT is more efficiency >90% .and omron BUx002RWL is almost 95%
    everybody know online is 0mS switching time ( because they dont switching lol ) . but the give you a stable voltage output my SURT give me 230v ( just~1v tolerance ) . it best for testing or supply for some device very sensitive .
    line interactive cant do this

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    I hate acronyms

    "The Smart-UPS™ you’ve come to trust now offers 2x the battery life and up to 50% lower TCO."

    TCO = Total Cost of Ownership (I think)

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    Quote Originally Posted by ashiekh View Post
    I hate acronyms

    "The Smart-UPS™ you’ve come to trust now offers 2x the battery life and up to 50% lower TCO."

    TCO = Total Cost of Ownership (I think)
    My dream UPS would act more like an active filter. The PLL would stay locked in at all times and the mosfets or IGBTs would begin injecting (or sinking) power extremely rapidly. Using sigma-delta DDS, you'd be getting a beautiful, low distortion sine wave generally superior to what's coming from the wall.

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    Quote Originally Posted by gdjacobs View Post
    My dream UPS would act more like an active filter. The PLL would stay locked in at all times and the mosfets or IGBTs would begin injecting (or sinking) power extremely rapidly. Using sigma-delta DDS, you'd be getting a beautiful, low distortion sine wave generally superior to what's coming from the wall.

    UPS United Parcel Service ;-)
    PLL Phase Loop Locked
    IGBT Insulated-gate bipolar transistor

    DDS ?

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