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Help me build Frequency Doubler (110vac 60Hz - 110vac 120Hz)

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Frequency Doubler

I need to build a frequency doubler to take 110vac 60hz to 110vac 120hz or close with in reason the number of hz doesn't have to be exact any idea's would be very helpful I am a little over my head on this project so and good detail's that you can provided me would also be very helpful


Thanks
 

Re: Frequency Doubler

my field is communication and when have this problem, we use a power 2 and remove DC part. because:
cos^2(a)=1/2+1/2*cos(2a)

in power field maybe you use this idea.
 

Re: Frequency Doubler

If the application is low power, you can use a full wave rectifier and a bandpass filter centered on 60Hz - just simulate a full wave bridge in PSpice and see that the output spectrum has a strong component at 2*Fin.

Also you can use:
- an analog multiplier - as salam2000 said - like MC1496 - see the datasheet it has an example of a frequency doubler circuit;
- a non linear amplifier + BPF ;
- a PLL multiplier - maybe too complicated for this purpose.

For a high power application i think it's better to rectify the AC voltage and use a switching converter, clocked at 120Hz.
 

Re: Frequency Doubler

Less then 1 Watt
 

Hi again everyone,

Ok, I've revived (bumped) this thread because I have exactly the same requirements as the originator.

I need to convert 120 VAC 60 h to 120 VAC 120 Hz or if I use the secondary side of the toroidal transformer, then 60 VAC from 60 Hz to 120 Hz.before rectification. I could to the frequency doubling at the 120 VAC primary side of the transformer, but I think that finding a toroidal transformer that can handle the 120 HZ at 120 VAC might be too expensive.

I've attached a basic

The idea is similar to a switching power supply but much simpler. I want to ensure that the DC portion of the power supply has lots of recovery as it is being used to drive a 240 watt single channel amplifier module.
 

Hi Alexan_e,

This looks like what I'm trying to build. Correct me if I'm wrong, but the circuit you refer to looks like it's trying to rectify the positive and negative legs individually. I can see this as a bonus so far as load balancing. I plan on using schottky diode bridges for speedy recovery, but would I have to find matched bridges?

By the way, that's a great article (Solid State Power Amplifier Supply Part 1) you refer to in your note. Thanks!

I'm not sure if doubling the frequency from 60Hz to 120Hz either at the primary or secondary of transformer would have any beneficial effect. Any thoughts?

Next is how to regulate this baby. I love the design you've suggested!~

Guy
 

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