 TA63ST215WPremium,MVM
join:2000-11-23
there
kudos:2
 ·TekSavvy DSL
 ·Cogeco Cable
| Suggestions for 1800 W 120V -> 100V transformer I have a pair of devices originally designed for 100V that I would like to use on 120V.
One is an inverter operated Heat pump type washer/dryer, the other is a mini-split A/C heatpump.
What are my best options for transformers?
Preferably sourced out of Canada, or if necessary from a vendor that ships to Canada.
--
The talented hawk speaks French. |
|
|
|
 leiboldPremium,MVM
join:2002-07-09
Sunnyvale, CA
kudos:6
·SONIC.NET
| I was thinking APC Line-R AC voltage regulators (definitely available in Canada) but their output voltage doesn't go low enough (settings are 110, 120 and 127) and the output power is not high enough (1200W in the largest model).
Depending on the permissible input voltage tolerance on your devices a regulated 110V output may be fine (most line powered devices allow for at least 10% tolerance in either direction).
--
Got some spare cpu cycles ? Join Team Helix or Team Starfire! |
|
public
join:2002-01-19
Santa Clara, CA | reply to TA63
said by TA63:What are my best options for transformers?
Preferably sourced out of Canada, or if necessary from a vendor that ships to Canada.
If your devices cannot accept high line input, a 2kVA autotransformer with a 100V tap would be small size reasonably priced solution. |
|
 Red_Menacepoking around since 1978
join:2001-11-03
Littleton, CO | reply to TA63
You can build your own setup using a buck transformer, or maybe use a step-down converter such as this one. |
|
 UHFAll static, all day, ForeverPremium,MVM
join:2002-05-24 | reply to TA63
I got a couple of 30A Variacs collecting dust. |
|
Zach 58Premium
join:2006-11-26
NW Minnesota | reply to TA63
Any electrical supply house should have 'buck/boost' transformers. A 0.75 kVA 120/240 x 12/24 will get you within 4 volts (low) when connected as a 120V w/24V buck. A 0.5 kVA 120/240 x 16/32 will get you within 4 volts (high) when connected as a 120V w/16V buck.
»www.acmepowerdist.com/buck-boost.htm
Buck/boost data sheets:
»www.acmepowerdist.com/pdf/Page_104-109.pdf
--
Zach |
|
 SparkChaserPremium
join:2000-06-06
Downingtown, PA
kudos:3
 ·Verizon FiOS
2 edits | reply to Red_Menace
said by Red_Menace:You can build your own setup using a buck transformer +1
That's what I was just going to recommend. You can put 2 transformers in buck or a boost configuration depending on what's available.
EDIT: I haven't bought power transformers in years. Their prices are sure high.  |
|
| reply to TA63
I think there's a better than 50% chance that they would work just fine on 120V.
But if you want to run them at close to 100V, you have several different options, and one may be better than others depending on certain variable. Do you want to use them a lot, or just once in a while, for example?
--
Wacky Races 2012! |
|
Reviews:
·AT&T U-Verse
| reply to TA63
An autotransformer is your best bet. They are available for high power and they are cheap (well, depends on your definition of cheap).
»www.amazon.com/contact-voltage-r···nsformer
|
|
SparkChaserPremium
join:2000-06-06
Downingtown, PA
kudos:3 Reviews:
·Verizon FiOS
| Well that's not bad compared to some of the individual transformers I was looking at 
--
--
--
"Facts do not cease to exist because they are ignored." - Aldous Huxley
"I’m not familiar precisely with exactly what I said, but I stand by what I said, whatever it was.." - Mitt Romney |
|
TA63ST215WPremium,MVM
join:2000-11-23
there
kudos:2 Reviews:
·TekSavvy DSL
·Cogeco Cable
| said by SparkChaser:Well that's not bad compared to some of the individual transformers I was looking at
What about the example Red Menace posted?
--
The talented hawk speaks French. |
|
TA63ST215WPremium,MVM
join:2000-11-23
there
kudos:2 | reply to aurgathor
Extended/regular operation is a good possibility.
--
The talented hawk speaks French. |
|
TA63ST215WPremium,MVM
join:2000-11-23
there
kudos:2 | reply to UHF
I was under the impression that the variac needs to be adjusted according to the load applied.
Do they kick off a lot of heat?
--
The talented hawk speaks French. |
|
iknowPremium
join:2012-03-25 | reply to TA63
do they have taps on those machines for different voltages?. if they don't, a 30AMP battery charger transformer should do the trick as a buck transformer, even if you have to add or remove some windings, the charger is cheaper than buying a transformer outright. also, a pair of microwave oven transformers in parallel would do the trick as a buck transformer, you'd need to remove the high voltage windings,(the outer, thin windings) and replace those with 10GA. 20Volt windings, a hacksaw does quick work of getting most of the windings off,(be careful not to cut into the primary, large windings) then use a punch and hammer to remove the windings from the sides. i've done this many times. |
|
TA63ST215WPremium,MVM
join:2000-11-23
there
kudos:2 Reviews:
·TekSavvy DSL
·Cogeco Cable
| said by iknow:do they have taps on those machines for different voltages?.
No, they don't.
--
The talented hawk speaks French. |
|
patcat88
join:2002-04-05
Jamaica, NY
kudos:1 | reply to TA63
said by TA63:I have a pair of devices originally designed for 100V that I would like to use on 120V.
One is an inverter operated Heat pump type washer/dryer, the other is a mini-split A/C heatpump.
Japanese for Japan? |
|
TA63ST215WPremium,MVM
join:2000-11-23
there
kudos:2 | Yes, for Japan. (60 HZ) |
|
patcat88
join:2002-04-05
Jamaica, NY
kudos:1 | If its an inverter + motor, why not run it at american wall voltage? 100v vs 120v is usually in the tolerance range of SMPSes. The transistors will simply create shorter pulses of current. Nobody makes SMPS that are calibrated off line voltage. Since Japan is 50 and 60 hz, no devices with plain induction motors are sold in Japan. Its either VFD induction or universal motor. |
|
1 edit | reply to TA63
I see this advertised in the free weekly Japanese magazine I get at the local Japanese grocery store: 変圧器 １２０Ｖ→１００Ｖ 容量１５００ワット ('Transformer 120V->100 V Capacity 1500 W', if you can't read Japanese.) Disclaimer: Have neither used this nor bought from this place. Personally I have been using a 100 V electric thermos, bought in Japan, on US AC for the last 4 years without issues. But YMMV. Edit: oops, just realized you needed 1800 W, and this is rated 1500 W. |
|
TA63ST215WPremium,MVM
join:2000-11-23
there
kudos:2 Reviews:
·TekSavvy DSL
·Cogeco Cable
| reply to TA63
I have given thought to just using them, but I just can't get comfortable with it.
Broccoli, thanks for the link. Holy crap those guys are expensive. I bought the same brand from Yahoo Auction in Japan for less than 1/2 of that asking price.
It does look like a handy site for some stuff though.
--
The talented hawk speaks French. |
|
