Let's have a talk among ourselves.

Exactly.
The single-post-ever thread starter was last seen here over 6 months ago.

 

Exactly.
The single-post-ever thread starter was last seen here over 6 months ago.

joined: 2010
posted: 2025
will revisit : 2040

 

A 400hZ 120 volt inverter could be a useful device to have. I wonder about revising one of those small package 60 Hz 120 volt inverters to deliver.
Unfortunately FAIR RADIO seems to have gone out of business.

 

A 400hZ 120 volt inverter could be a useful device to have. I wonder about revising one of those small package 60 Hz 120 volt inverters to deliver.
Unfortunately FAIR RADIO seems to have gone out of business.

400Hz is not that hard to achieve. Can programmable MCUs help?

 

400Hz is not that hard to achieve. Can programmable MCUs help?

Certainly there are simple ways to generate a frequency accurately. It is always THE POWER LEVEL that is the challenge, when other than the mains frequency is required.
Fair Radio used to have a great deal on a sideband radio that needed quite a few amps but at 400Hz. Certainly it was possible to build a mains powered alternative power supply, but not for mobile applicaton.

 

400Hz is not that hard to achieve. Can programmable MCUs help?

The 400 Hz is easy enough with just about any MCU. The difficulty arises with getting a 400 Hz sine wave at the desired power level of 500 watts. That takes a little more doing. Guessing a function generator chip like the XR2206 for the sine wave and maybe a IGBT to amplify it. Using a uC you end up starting with a square wave.

Anyway, as mentioned, this is a pretty old thread so for future reference.

Ron

 

My choice would be to generate the 400 HZpower with an inverter circuit powered with rectified mains voltage. I would try to use a surplus 400 Hz transformer for THE INVERTER OUTPUT. At one time surplus 400 Hztraansformers were available as surplus, not to terribly expensive. That is the part that made the choice attractive. But I am not aware of the current availability or pricing.

 

I was jokingly going to suggest a motor/generator. I'll be, Kato is still making the things, we had their units along with old GE Amplidynes, the latter were 3 phase beast driven by 40 HP and larger motors. Thankfully those days are gone. I can't believe Kato is still at it.

Ron

 

I personally do not go for huge projects because the cost of DIY is almost always more than off the self. Unless you are member of large corporation's lab and you have seen all trial and error at the expense of the manufacturer.

 

An inverter would not be a "Huge Project" for those who both have the knowledge and resources to design and build one. It would be a bit much for a beginner who lacked those resources.
Unfortunately the TS provided us with no hint as to their resources or abilities: " I am in need of 100W 230v 50Hz to 115v 400Hz converter Circuit. Help me" . And we get no hint as for the application. I wentback and looked at the "information" about the TS. I have said enough.

 

To @madhee2000 :

https://aliexpress.ru/item/10050103...w.productlist.search_results.0.3d0649a24354M0

 

For most loads that require sinusoidal voltage, a trapezoidal voltage will also be suitable. It is simpler to generate such voltage than a sinusoidal one.
At our factory, a Victron UPS operates, which generates such a voltage.

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