Frequency converter for single-phase motor

[quartz]

Yes chatelot16, you are absolutely right, the durability of a product passes through the scattered components.

There is no shadow of a photo.

A+

[Forhorse]

This kind of component is massively used in industrial drives (schneider, omron, ssd, etc ...). The engineers do not amuse themselves to reinvent things that the semiconductor manufacturers offer in fact with better performances (transistors tested and apairés, optimized control circuit, monitoring and integrated safety, ...).

It's like trying to compare FPGA and wired logic.

When it's dead we change the complete module (in the industry we change the complete drive ...)
And it's a safe bet that in a few years, even if the reference module no longer exists, there will be spindle-compatible equivalents with better performances.

In short, you can continue to wind up with yakafocon and do not propose anything concrete (there are specialists here ...) but for me it's clear, the day I embark on the adventure j would use exactly the component proposed on this diagram.

Anyway I did not put here to have opinions or criticisms but to share this discovery with those who are interested and who might need it (I remember a post Christophe who wanted to vary the speed of 'a pump...)

If you think you can do better than what is proposed go for it, but I know full well that aside from pages and pages of pointless talk, no one will ever come up with a concrete outline of some "better" solution. (and I'm not even talking about a concrete realization aimed at demonstrating the viability of the said solution ...)

[chatelot16]

do not get mad !

this note of application is very interesting, and it is even possible that I buy this kind of module for testing

the built-in control logic at the bridge contains protection against simultaneous transitor control: it can save the life of the transistor in the event of a program jam in the peak

it gives me even a doubt, maybe the program of the application note is not enough to control the transistors live without this module


my criticisms of the integration of different function are of another order

for a manufacturer in the industry is not a problem: we buy the big cheap module, if it does not work we change ...

but for an amateur it changes everything ... at the least false maneuver you have to change the whole module

it is precisely for a small pump that we can be satisfied with smaller transistor, cheaper than the module

[Christophe]

In 2022 there are three-phase 2.2kW variable frequency drives at 120€ on Amz... it's called a VFD (for variable frequency drive)

I just bought one, the tests are in progress (for the moment "it didn't work") electricity-electronics-computers/who-would-have-already-used-a-vfd-to-simulate-three-phase-from-220v-t17282.html

[Forhorse]

On aliexpress you will also find drives for single-phase motors (often intended for pumps elsewhere) they are sold in the same price range as three-phase drives.

[Christophe]

Yes Forhorse, except that I wanted to test the possibility of simulating a three-phase network with this VFD...my idea was to use only 2 of the 3 phases to power my pump...

Except that for the moment I can't do it ... not even able to run a 40W circulator ... there are about 30 groin parameters I have to dive into it ...