[Nut-upsdev] Voltage transfer points.

[Peter Selinger]

As far as I (and grep) can see, the only drivers that are defining
input.transfer.trim.* or input.transfer.boost.* are:

mge-hid.c: 

 This driver explicitly treats input.transfer.boost.low as an alias for
 input.transfer.low. Similarly, input.transfer.trim.high is an alias
 for input.transfer.high.

mge-utalk.h:

 Exactly the same behavior as mge-hid.c.

al175.c:

 This driver only defines input.transfer.boost.low, and does not
 define any other variables in the input.transfer.* family.

There are no drivers that distinguish input.transfer.boost.low from
input.transfer.low or input.transfer.trim.high from input.transfer.high.

So I agree with you that the variables are redundant; strictly
speaking, only four of them are needed:

input.transfer.low  
input.transfer.boost
input.transfer.trim  (buck?)
input.transfer.high

I suspect that the low/high terminology comes from MGE, as their
drivers are the only ones using them. You better check with Arnaud
before making any changes. 

-- Peter

Kjell Claesson wrote:
> 
> Hi,
> 
> Need to get an answer to the following. I find the naming to be
> little redundant regarding the 'input.transfer.boost.low - hige'.
> The same goes for input.transfer.trim.low - high.
> 
> As I find it, there is only one point where the boost or buck (trim) 
> kicks in.
> 
> Let's say that the nominal voltage is 230 volt, then we have a
> input.transfer.boost point on say 220 volt.
> 
> If the voltage drop any more, it reach the 'input.transfer.low',
> when it would go to battery.
> 
> The same goes for buck (trim). Like this.
> 
> input.transfer.high: 255 Volt (Go on battery over that voltage)
> input.transfer.trim: 240 volt (Trim the voltage)
> input.voltage.nominal: 230 volt
> input.voltage.boost: 220 Volt (Boost the Voltage) 
> input.transfer.low: 205 Volt (Go on battery under that voltage)
> 
> So the transfer.boost.low value is the same as transfer.low as
> i see it. The same goes for transfer.trim.high and input.transfer.high.
> 
> Or is there any ups out there that you can set the 
> input.voltage.boost.low to say 210 and input.transfer.low to 205.
> What does that ups doing between 210 and 205 Volt ?
> 
> Regards
> /Kjell
> 
> 
> 
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