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 > What is a “converter”?

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valhalla360

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Posted: 04/22/21 12:56pm Link  |  Quote  |  Print  |  Notify Moderator

Kayteg1 wrote:

valhalla360 wrote:


As far as the name, you could as easily say an inverter CONVERTS from 12vDC to 120vAC and it's true ....


You can't convert AC from DC.
You have to invent AC current using electronic devices and then you can convert to desired voltage.
Over the years converters went via several designs.
Back in 1980's they would supply 12VAC for RV lights and water pump, when small DC circuit would charge the battery and operate radio.
Then some designs put 12VDC converter parallel to the battery, some disconnects the battery from RV when on converter.
That surprised me lately as 20 yo converter was showing 18V on new digital gauge.
Took few forum experts (not on this forum) to figure out that converting AC with electronic circuit, the voltage spikes high for microsecond, before it levels at ca 12V.
Analog meters will not register it, some digital multimeter will not register it, but cheap meter that come with lighter socket does.


Sure it can. 12vDC goes in one side, is converted to 1120vAC out the other side. Convert and Invert aren't well defined terms and outside of the RV world, you will never hear of a battery charger referred to as a converter.

Went ahead and looked it up. The definitions for converter are all over the place. Some describe what you do that it only converts the voltage but not AC to DC. Others say it also converts AC to DC. Even found one that.

A battery charger doesn't leave the ambiguity.

* This post was edited 04/22/21 01:09pm by valhalla360 *


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Kayteg1

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Posted: 04/22/21 01:19pm Link  |  Quote  |  Print  |  Notify Moderator

English language is famous for words multi-meaning, but for me this case is easy.
Conversion is changing the same parameter to different value.
Like transformer is converting 1 AC voltage to another, who later can be "straighten" by diodes to simulated DC, what makes RV converter.
Inverter changes DC to AC, so this is new invention.
Battery charger is multi-task device, where converter is part of it.





Kayteg1

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Posted: 04/22/21 01:42pm Link  |  Quote  |  Print  |  Notify Moderator

Additional note, when RV converters and battery chargers might be consider identical twins, most of the time they are not.
All RV converters I had , supply above 14.5V, what on long run boils the battery dry.

Sjm9911

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Posted: 04/22/21 02:51pm Link  |  Quote  |  Print  |  Notify Moderator

I dont like the term battery charger for the converter. If i dont have a battery I plug in my converter and the DC stuff works. Saying its a battery charger implies i have a battery in the system or that the converter is only used for one thing. My converter has fuses for multiple things. I dont have a battery charger that does that.


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toedtoes

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Posted: 04/22/21 03:03pm Link  |  Quote  |  Print  |  Notify Moderator

Sheesh. You guys need to get out more. Really, arguing if a converter is actually a converter?? [emoticon]


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jimh425

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Posted: 04/22/21 03:30pm Link  |  Quote  |  Print  |  Notify Moderator

toedtoes wrote:

Sheesh. You guys need to get out more. Really, arguing if a converter is actually a converter?? [emoticon]


We really need the ability to like a post. [emoticon]


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garym114

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Posted: 04/22/21 04:05pm Link  |  Quote  |  Print  |  Notify Moderator

Primary purpose of a converter is to supply 12v to RV from 120v AC shore power.
An inverter creates 12v AC from 12v DC.


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HomeSlice

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Posted: 04/22/21 04:34pm Link  |  Quote  |  Print  |  Notify Moderator

garym114 wrote:

Primary purpose of a converter is to supply 12v to RV from 120v AC shore power.
An inverter creates 12v AC from 12v DC.




Wow, I didn’t expect this level of conversation. Thanks everybody.

dieseltruckdriver

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Posted: 04/22/21 07:51pm Link  |  Quote  |  Print  |  Notify Moderator

jimh425 wrote:

toedtoes wrote:

Sheesh. You guys need to get out more. Really, arguing if a converter is actually a converter?? [emoticon]


We really need the ability to like a post. [emoticon]

I like both of these posts! [emoticon]


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Siletzspey

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Posted: 04/23/21 10:24pm Link  |  Quote  |  Print  |  Notify Moderator

Some "converters" are just simple-minded voltage converters (24VDC->12VDC) that lack the technology to *properly* monitor and charge a battery.

Most if not all "chargers", in addition to possibly converting voltages up or down, know how to monitor a battery's charge level and apply the appropriate bulk, absorb, float and maintenance charges.

It does seem many 120VAC->12VDC products are just called "converters" even though they have battery charging smarts too. And in the case of my Progressive Dynamics Inc. "converter with charge wizard", it can safely power things WITHOUT a battery.

The upshot, the terminology is not 100% standard, and I'd say you need to make sure the specs call out battery charging if that's one of the things you want.

--tg

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