Variable speed drive for asynchronous motor

[Christophe]

I would like to vary the speed of our solar pump in order to optimize the operation of the system.

The pump is a single-phase 650W guinard pump.

What exists as an apparatus to vary the power of such an engine and at what cost (about?). Thank you

[jonule]

It seems to me that precisely an asynchronous can not see its speed vary electrically ... it would rather an intermittent operation that should be considered?
Otherwise vary the frequency?

.....

[tome]

Hello,

To vary its speed, it is necessary to straighten and filter the sector,
Then mount a variable frequency bridge chopper.
It is cheaper to carry out

[Christophe]

Uh thank you tom but you have more info on it? A website? A map? A soldering kit is even? Or even a dimmer provider?

[tome]

You can put the EDX-075-21-E, but it's still the same port 150Euros!
right here: http://www.technic-achat.com/boutique/f ... ZwodYi3mxg
If not for the schema I have nothing, maybe nlc could have you that!

[dirk pitt]

You got that who works well
Here is 12roro90 at conrad
For 650w it may be necessary to put a small radiator but it is to see according to the running time

[tome]

Yes but not the molded triac module is good for brush motors

[Christophe]

Did you know what the Altivar range of Schneider Electic? It seems to be very good stuff but probably expensive (my budget is 100 € max) ...

On Ebay we find less than 50 € ...

[Christophe]

You can put the EDX-075-21-E, but it's still the same port 150Euros!
right here: http://www.technic-achat.com/boutique/f ... ZwodYi3mxg
If not for the schema I have nothing, maybe nlc could have you that!

Thank you, from what I see is what corresponds to the altivars of SE ... and in the 2 cases they speak of output in threephase ... or my motor is powered in single-phase (unless there Have possibility to feed it in three-phase I will look tomorrow ...) ...

So I ask myself: Is that three-phase is a necessary condition to vary the power of an asynchronous motor?

[dirk pitt]

That someone explains why the module triac does not work and what it works then ...