Frequency converter

[dthimot]

Hello everyone
How to pass from a 3 phase 120/208V 50Hz to 120/208V 60Hz ?
what transformer can do that ?

 

[zbang]

None, transformers can not change the frequency, you need something considerably more sophisticated to do that.

What's the actual issue or problem you're trying to solve?

 

[gar]

210412-2020 EDT

dthimot:

Consider a wound rotor motor. Note, an induction motor is a transformer.

See: https://www.quora.com/How-induction-motor-work-as-frequency-changer

.

 

[zbang]

Interesting approach to the question.... probably works by also then needs a second motor to drive the rotor (and associated controls). And definitely not what people think of as a transformer.

 

[tortuga]

dthimot; post some more info the load, is it a motor?
and if so look into a Variable frequency Drive or VFD.
If its a resistive heating load you need not worry about frequency.

 

[drcampbell]

Not just resistance heating. Frequency conversion is not necessary for many applications.
If there are pulleys and belts, or sprockets and chains, the mechanical drive ratio can be adjusted to accommodate the different motor speed.
Many machines can simply be operated at the higher or lower speed if the voltage is appropriate. (near-constant volts-per-Hertz ratio)

But are you sure you have 120/208V 50Hz? That's a very unusual service configuration.

 

[Besoeker3]

But are you sure you have 120/208V 50Hz? That's a very unusual service configuration.

My thoughts exactly. Haiti is 60Hz so maybe the poster is trying to use a 50Hz bit of kit for his application. Maybe we will find out in due course.

 

[Speedskater]

While most 50Hz motors and transformers are happy with a 60HZ supply, the opposite is often not true.

 

[tortuga]

Haiti is 60Hz

Interesting do we know that for sure?
I thought they got grants from China to rebuild their grid at one point, perhaps they switched?