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#1
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3-phase from DC converter?
I require a 3-phase power source of 115VAC @ 400Hz with an output of around
100mA or so. I would like to power this from 12-14V DC. Does anyone have any suggestions about a circuit I could use - or design one for me? The connections to the device I want to run (an ancient attitude gauge or artificial horizon from a vintage aircraft) is delta configuration (delta-wound gyro motors) - no centre or common connector. Cheers, Joe |
#2
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3-phase from DC converter?
Hi Joe,
You could contact some stores that cater to land surveyors. There are some three-phase 115V 400Hz gyros used in that field, or at least they used to. Since they often work off grid using a 12V battery there should be inverters offered. I have seen one a long time ago and since these gyros use so much power the inverter is kind of large, it was the size of a brick. Regards, Joerg http://www.analogconsultants.com |
#3
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3-phase from DC converter?
Will try that lead Joerg. Thank you.
Although that sounds like it might be expensive.... Cheers, Joe "Joerg" wrote in message ... Hi Joe, You could contact some stores that cater to land surveyors. There are some three-phase 115V 400Hz gyros used in that field, or at least they used to. Since they often work off grid using a 12V battery there should be inverters offered. I have seen one a long time ago and since these gyros use so much power the inverter is kind of large, it was the size of a brick. Regards, Joerg http://www.analogconsultants.com |
#4
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3-phase from DC converter?
"Joe in Bendigo" I require a 3-phase power source of 115VAC @ 400Hz with an output of around 100mA or so. I would like to power this from 12-14V DC. Does anyone have any suggestions about a circuit I could use - or design one for me? ** A switch mode, 400 Hz three phase inverter for use with avionics was published in "Electronics World " in the February 1999 issue, p127. But it ain' t simple. ............ Phil |
#5
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3-phase from DC converter?
Hi Joe,
Will try that lead Joerg. Thank you. Although that sounds like it might be expensive.... Yes, it could be expensive. But you might also try surplus dealers that sell discarded mil and industrial gear. With some luck one of them sits on a stash of those and is eager to let them go. That's where I used to get the best deals. Regards, Joerg http://www.analogconsultants.com |
#6
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3-phase from DC converter?
"Paul Mathews" Transformer VA rating could be considerably less than the wattage of your load, since power ratings would be effectively higher at 400Hz (compared to their 50 or 60Hz VA rating frequency). ** The VA rating at 400 Hz will be virtually the same as at 50/60 Hz. The magnetising current in the primary will reduce at the higher operating frequency but since this is a small fraction of the rated current ( indeed small for a toroidal) there is not much overall change. .............. Phil |
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