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I have this problem that I need a 120hz power supply whit 220 Volts for my project. Does any one have any suggestion about haw to doing it or help me whit some schematics like a converter that I can use?!! My main Voltage source is 220v in 60hz.

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    \$\begingroup\$ Why do you need 120hz power? If you explain what your project is, there may be easier ways to achieve your actual goal. \$\endgroup\$ – Grant Feb 20 '15 at 23:40
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How much current / power do you need?

Head over to your closest industrial electrical supplier and ask about Variable Frequency Drives (VFDs). These will do what you want at probably lower cost than you can build it for.

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  • \$\begingroup\$ Thanks, it was a good point, but actually I have to build it on board for some other parts in one place. \$\endgroup\$ – kia_rst Feb 20 '15 at 21:36
  • \$\begingroup\$ oh, and my current would be 10A at most. \$\endgroup\$ – kia_rst Feb 20 '15 at 21:38
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    \$\begingroup\$ You realize that 220V at 10A is over 2000 watts. What size board do you have and do you have any experience with such voltages and power levels? \$\endgroup\$ – Barry Feb 20 '15 at 22:13
  • \$\begingroup\$ Building your own VFD from scratch to handle the power level you are mentioning is a non-trivial task. I strongly suggest that you look at a commercial offering before deciding to go down that path. \$\endgroup\$ – Dwayne Reid Feb 21 '15 at 19:30
  • \$\begingroup\$ FWIW - a friend of mine did his Masters thesis on a similar project and was successful - I think that there were a couple of patents that arose out of his research and the technology was licensed to a statup that became quite successful. But some of his mistakes along the way were pretty darned expensive - high power semiconductors are expensive and they fail in spectacular ways. \$\endgroup\$ – Dwayne Reid Feb 21 '15 at 19:37

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