12V or 24V DC to 400 hz 115v Sine Wave Circuit

[cficywg]

I brought an Artificial Horizon that was incorrectly described as 28v DC
but is in fact out of a SkyHawk fighter that used 115V Sine Wave at 400 Hz

Would anyone have any circuits or circuit ideas for such a supply?

Email is this user name at Gmail.com

[Bede]

I brought an Artificial Horizon that was incorrectly described as 28v DC
but is in fact out of a SkyHawk fighter that used 115V Sine Wave at 400 Hz

Would anyone have any circuits or circuit ideas for such a supply?

Email is this user name at Gmail.com

You will need to buy or build an inverter. What are you using it for?
https://lonestaraviation.com/product/in ... e5dceea252

[broken_slinky]

If you're just trying to run it on the bench, buy a variable AC power supply like this: https://www.ebay.com/itm/315130944819?m ... media=COPY

The other option for bench testing would be a VFD. You can get inexpensive units off places like Aliexpress that'll do 400Hz. This will require some MacGyver'n to get it to work though.

[Bede]

Voltage Conversion: You'd need a hefty step-down transformer to convert 115V to a usable voltage for typical electronics (usually 12V or lower DC).

Why does it have to be hefty?

Frequency Conversion: Most electronics are designed for 50 or 60 Hz AC. The 400 Hz frequency might cause malfunctions or damage.

Why?

Circuit Ideas: Unfortunately, due to the high voltage and frequency conversion challenges, readily available circuits for this specific setup are unlikely.

115 VAC isn't high voltage. I don't understand the challenges. An inverter is a relatively elementary circuit.

[Pratt X 3]

Don't waste your time; you are dealing with an AI Bot. This place is starting to get overrun by them. Probably why there is such an issue with how poorly it loads now. This is now the third bot I've seen today.

[PilotDAR]

There were several dedicated modules which were used to power these, one I remember was solid state, the other was essentially an electric motor powered by 28VDC with had the 115V 400Hz output. These are historical. In their day, they were the thing, now they are a half century old.

I worked part time for a few years under Vic LeBlanc at Toronto International back in the early 80's. From that learning, I now see that like any equipment, aircraft instruments have a practical life in both technology and individual condition - the old design also wears out. Sure, they can be repaired as long as the parts and skilled workers are available, but the new technology overtakes the old.

Considering the custom installation, operational vulnerability, and repair cost (even though acquisition of used instruments might be low) of old technology instruments I would not bother with them any more - go straight to glass cockpit if it is appropriate to the airplane. I would not install a brand new vacuum system in a light airplane any more. Maybe repair the elements of what's in an existing airplane, but I lean toward glass now.

If you're thinking you need to install a gyro instrument at some cost and effort, you're thinking you might need to rely upon it during some flying. You just don't want to be relying upon a 50+ year old electric instrument with a non certified power system. If the airplane type and operation does not really require a gyro instrument, save the weight, complexity and vulnerability and just don't install gyros. For the times I have flown some non gyro equipped aircraft in marginal conditions, it was a clear reminder that I should not be pressing on - the aircraft was not equipped, nor appropriate for that operation.