# 50Hz to 60hz Frequency converter

#### Frequency_converter

Joined May 12, 2011
3
Where can i find a oscillator that input is 50Hz/110V and out 60Hz?
Am making a 50-60 frequency converter, i already making the rectifier side of the circuit, but now i need a oscillator that can out 60Hz from 50Hz input...
Thanks you, this is an important project.

#### Jaguarjoe

Joined Apr 7, 2010
767
What voltage and what current?

#### Frequency_converter

Joined May 12, 2011
3
Not sure about the current yet, just focusing on a input of 110v/50hz to get an output 0f 110v or 220v at 60Hz

#### Wendy

Joined Mar 24, 2008
22,138
It would be possible to use phase locked loop tech for the converstion, but it would make a lot more sense to convert one to DC, then use that to power a different oscillator. If you need accuracy you could use a crystal, and divide it down. Overall this would be much simpler. The phase locked loop method would be a bit more complex IMO.

#### THE_RB

Joined Feb 11, 2008
5,438
http://www.romanblack.com/one_sec.htm
about half way down the page there are a number of simple but high accuracy systems for 50-60 Hz conversion. They use very cheap common PICs like the 12F675.

Here is one in action, detecting 50Hz input from a diode and generating an exact math-locked 60Hz output;

#### marshallf3

Joined Jul 26, 2010
2,358
If you're wanting to run any sort of load off this you'll need to use a transformer and rectifier setup to get the 110 down to 12 - 14V then use it to drive a common inverter that outputs 60 HZ.

At least that seems to be the simplest way to me.

#### Frequency_converter

Joined May 12, 2011
3
That is the step we taking, we already have the rectifier circuit is just the oscillator that giving the trouble. We try a bubba oscillator, not getting that 60Hz output we need, plus we ain't getting a sine wave either. The closest we get to 60Hz is with the used of a wein bridge oscillator, but the sine wave has sum ripple in it........

#### Jaguarjoe

Joined Apr 7, 2010
767
Buy a 50Hz AC motor and a 60Hz AC generator/alternator. Connect them with 2 pulleys and a belt. Calculate the pulley ratio as close as practical and make one of the pulleys variable pitch. Fine tune the pulley pitch till you get exactly 60Hz.

A simple WB oscillator by itself doesn't have ripple. There's probably something wrong with your power supply.

You can digitally synthesize a sinewave with a ring counter and weighted resistors. See page 667 in the Art of Electronics. They use a 4015 counter, you could use a μC just as well.

#### Bernard

Joined Aug 7, 2008
5,472
The schools had some master clocks using crystal controlled 50 Hz oscillator with power amplifier to drive 50 Hz timing motors; nice idea but medium term accuracy was poor. ' Used a PLL IC to generate line ,60 Hz, controlled 300 Hz which was then counted down to 50 HZ, then filtered a little & amplified with origional amplifier. Worked for many years. If your line frequency is 50 HZ should work in reverse just fine.

#### THE_RB

Joined Feb 11, 2008
5,438
The web page I linked to in post #5 has 50Hz and 60Hz standalone xtal based sinewave generators, and also 50 to 60Hz conversion devices.

All they require is a \$1 PIC chip and not much of anything else.