Wireless power transfer for lightning led.

[Jeetkumar]

Hi All,

I am working on wireless power transmission project. The frequency on which i am working is 18-20 Mhz. I was wondering if any one of you know what kind of led or bulb will light at this frequency?? My simulation and practical results gave me 70% efficiency. The only problem is i need to light up led or some sort of bulb in order to show that system is working properly.

P.s. I got practical results from network analyzer.

Thanks in advance.

 

[rodgerwxh]

what is your model? Typically wireless power converts AC signals into DC voltage for charging or switching. Are you able to share your model?

 

[jiripolivka]

Hi All,

I am working on wireless power transmission project. The frequency on which i am working is 18-20 Mhz. I was wondering if any one of you know what kind of led or bulb will light at this frequency?? My simulation and practical results gave me 70% efficiency. The only problem is i need to light up led or some sort of bulb in order to show that system is working properly.

P.s. I got practical results from network analyzer.

Thanks in advance.

At ~20 MHz, the only bulb you can use is a small incandescent bulb. You do not indicate the power level. There are tiny straight-line bulbs that operate at 1.5 or 3V (like in a digital wrist-watch) that can be used at > 500 MHz.

To light a LED, you must use DC current, so you must use a rectifier to operate it. Many "harvesting" projects use LEDS in a way that a 10 uF or 100 uF capacitor is slowly charged by a RF rectifier, then discharged into a LED.