Hi friends, thank you so much for the opportunity to write herei'm looking for a solution to make it work in Italy an USA air dryer.The air dryer is compatible with 120V/60hz 15amp, in Italy we use 230V 50HZ. I am looking to design my own frequency converter / circuit even rewinding he motor, Another option is to make it work with an inverter which should still provide the correct voltage & 60Hz frequency sinewave output.
as you can imagine i am looking any way possible to make this air dryer work in italy, i really need his particular model to work in Italy and implement it in my wife air saloon.
Thank you really in advance everybody that give me any support and even willing to work with me on his project
Best regards Andrea

 

Are you speaking of a commercial hair drying that people sit under?

 

Welcome to AAC!
Can you post a link to the dryer, or provide its full specification (make/model etc)?

 

If it is a Universal motor, (wound field) then the frequency will not make any difference.
(Air Dryer or Hair Dryer?)
What is the wattage of the unit?

 

Many handheld hairdryers use a technique whereby the fan motor is a brushed low voltage DC motor – the power (voltage) to the motor is via a bridge rectifier in series with the heating elements. With the AC current through the heating elements, rectified and passed through the motor, this results in an increase in motor speed as a higher heat output is selected.

If the hairdryer in question uses the above technique, then you only need apply the correct voltage as it will function at both 50/60Hz.

 

It would probably work fine on 50Hz with a lightly reduced air flow. A step down transformer would fit the bill.

 

If Universal there will be no air flow reduction,
Still don't know the nature of the (Air-Hair) ? Dryer?

 

good evening everybody sorry for the delay in replying got overbusy the past 24h. Many thanks for the passion and engagement, sorry for writing air dryer i got confuse because the brand name is actual revAir and my first language is no english lol
ok it is an Hair dryer
so here is The link of the product https://myrevair.com/products/revair

as you can see in the Tab spec of the product it is clearly mentioned :
“RevAir is compatible with 120V/60hz 15amp outlets only. The device will not operate with the use of a power converter, adaptor, or transformer”

now i have read online that people have imported his product and tried with a step down voltage inverter but nothing to do unfortunately i will no work

 

A transformer should work.

 

You would think so unless the frequency is that important. But the warranty specifically says for US and Canada only.

 

So as I posted in other forums, first see if the 120v heating element is made up of more than one parallel element, if so it may be possible to wire them in series for 230v.
If the motor has brushes then all you need is a small transformer 120/230.
Probabally states for US/Canada use due to 120v supply?
Can you show any pics of the unit and name plate and any internals\1

 

The air dryer is compatible with 120V/60hz 15amp, in Italy we use 230V 50HZ. I am looking to design my own frequency converter / circuit even rewinding he motor, Another option is to make it work with an inverter which should still provide the correct voltage & 60Hz frequency sinewave output.

Are you certain that it won't work with 50Hz and a step up transformer? I'd go the inverter route before doing something extreme like rewinding the motor.

implement it in my wife air saloon

Insurance for the business will likely require a robust solution. Units compatible with your local power aren't available?

 

So as I posted in other forums, first see if the 120v heating element is made up of more than one parallel element, if so it may be possible to wire them in series for 230v.
If the motor has brushes then all you need is a small transformer 120/230.
Probabally states for US/Canada use due to 120v supply?
Can you show any pics of the unit and name plate and any internals\1

Thank you for this your reply sir, so i must find out this that you suggest before do any other step.. ok will order one Hairdryer and open it, or maybe i can find out on the manual ? Thanks again sorrg for the ignorance

 

Are you certain that it won't work with 50Hz and a step up transformer? I'd go the inverter route before doing something extreme like rewinding the motor.

Insurance for the business will likely require a robust solution. Units compatible with your local power aren't available?

Thank you so much for your attention, you mean a step down transformare for the voltage ? Becouse actually i should carry it down from 230V to 120V, i have see a lot of people on reddit forum have tryed it but they still burned the Hair dryer so i went further doing reserch and some eletrical engenieer were sayjng that the frequency also must be adjusted for this Hair dryer .. how to do i dont know .. iam tempeted like you sayd to put hands on it like rewinding the motor or any other way and try it .. since frequency converters are industryal types and they are very costly ...

 

You can use a voltage and frequency converter specifically designed for this purpose. These converters take the 230V/50Hz input and convert it to the 120V/60Hz output required by your air dryer. Make sure to choose a converter that can handle the power requirements of your air dryer (15 amps). Keep in mind that good quality converters can be expensive and might have some limitations.

 

Thank you so much for your attention, you mean a step down transformare for the voltage ? Becouse actually i should carry it down from 230V to 120V

My bad, but you got what I meant. Try a step up transformer. Run the appliance and monitor for heating.

Since you already have the appliance, the safest thing to do would be to use an inverter. But, that would be the most expensive solution; aside from getting an appliance wired for your power.

i have see a lot of people on reddit forum have tryed it but they still burned the Hair dryer so i went further doing reserch and some eletrical engenieer were sayjng that the frequency also must be adjusted for this Hair dryer .. how to do i dont know

It depends on the motor and, possibly, the electronics if does something like speed control.

 

but you got what I meant

Good morning every body hope you all are doing good
So first of all i contacted the revair support team. i am pasting their response as following:

"Thank you for reaching out and for your interest in RevAir! Currently, RevAir is only available and approved to ship within the USA & Canada and will work in a 120V/60hz 15amp outlet.
*It will not operate with the use of a converter, adapter, or transformer.
While we intend on distributing in other countries we do not have a date to share yet at this time - we know this is not the answer you were hoping to hear! RevAir is a small brand and we absolutely hope to continue to expand and innovate as we grow in the future with international and improved models."

Another support reply was:
"Our device just won't work outside of a native 120V/60Hz outlet unfortunately! If you try to use it in something like a 230V/50Hz outlet with a step-down converter, there are two things that may happen. The first is that it might display a "P" to indicate an internal power failure and it won't turn on. The second is that it may start up momentarily and the motor will spin so fast that it will burn out and become unusable. Our team has tried many solutions to try to get the device working with different voltages and frequencies, but we haven't found anything yet. Since we're only certified for use within the US and Canada, we're also restricted to providing support (returns/warranty) to those regions. We've had people try to take the device outside of the US/Canada and use it in Europe only to have the device not work or to have the motor burn out, and then we're not able to allow returns or offer warranty service.

We definitely appreciate your interest in our device and we hope to have an international model for you in the future! We're a small brand of 20 employees and we hope to continue to expand our distribution as we grow!"

So as much frequency modulation is also the key factor and we cant neglect it. i also think that the reason why the company of is saying on their website that i cant use converters or transformers maybe that they dont want to risk. and they want to void the warrenty in this case. That is why they are warning.

But since iam here talking with top tier elettronics people here i would still like to find a solution that consider rewinding the motor or any other highly technical process that involves modifying the motor's coils to match the new voltage and frequency. if possible.

 

But since iam here talking with top tier elettronics people here i would still like to find a solution that consider rewinding the motor or any other highly technical process that involves modifying the motor's coils to match the new voltage and frequency. if possible.

First you need to identify the motor type, i.e. AC induction? Universal(AC/DC) Brushed? BLDC?, etc

 

So as much frequency modulation is also the key factor and we cant neglect it. i also think that the reason why the company of is saying on their website that i cant use converters or transformers maybe that they dont want to risk. and they want to void the warrenty in this case. That is why they are warning.

I don't see how the device would know that it was being supplied by an converter that provided 120VAC/60Hc at 15A.

At least they made it clear that you can't operate at 50Hz.

 

First you need to identify the motor type, i.e. AC induction? Universal(AC/DC) Brushed? BLDC?, etc

good evening, ok iam abou o order he revair so ha i can open i and send picure he onl issue ha i will ake 3 weeks o deliver,

if the 120v heating element is made up of more than one parallel element, if so it may be possible to wire them in series for 230v.

sorry so as I am trying to understand if this that you mention is the case, besides lower the voltage there is also opportunity to adjust the frequency?

First you need to identify the motor type, i.e. AC induction? Universal(AC/DC) Brushed? BLDC?, etc

In which one of those cases we can both adjust the voltage and frequency ?
Thanks for teaching me sir