Comment summary #52
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Comment 511 ... 520
| date | article | author | comment |
| 01 feb 2014 14:47:41 | Magnetic hysteresis | sv3ora | I see that you alter the generator amplitude to make the measurements. Would that be the same to set the generator to maximum amplitude and then limit the current to the primary through a limiting resistor to get the same measurements? |
| 01 feb 2014 03:17:49 | Magnetic hysteresis | Freddy | I ordered some square loop ferrite cores and got them today. Of course they had to be measured. The core is a Ferroxcube TN9/6/3-3R1. The primary as well as the secondary winding had 20 windings. The core is tested at four different drive amplitudes with a 200 Hz sinewave. |
| 03 dec 2013 21:16:36 | Extreme low voltage oscillator | Freddy | Sorry, this is the only core of this type I have. But you could try it with an other small core with a μr of around 2000. And keep trying to get the voltage lower! |
| 03 dec 2013 20:08:28 | Extreme low voltage oscillator | sv3ora | This is great! I have managed to get oscillations down to 86mv see my related page http://www.neazoi.gr/energy-harvesting/index.htm Do you have any of these cores so I could buy them to perform the experiment? |
| 29 nov 2013 00:30:32 | Magnetic circuits | Freddy | Thanks, it has been corrected. |
| 28 nov 2013 17:28:46 | Magnetic circuits | Colin Mitchell | If the ratio between the air-gap length and the width of the legs is very small, than it's save to set the air-gap area equal to the core area Ac. should be If the ratio between the air-gap length and the width of the legs is very small, then it's safe to set the air-gap area equal to the core area Ac. |
| 19 nov 2013 03:27:30 | Average & effective values | Freddy | Yes, it is correct. I recently checked it again because of the same question from someone else. |
| 18 nov 2013 21:12:54 | Average & effective values | Kamil | Hello, Are you sure about Arms value of Half-wave rectified sine? Kamil |
| 28 okt 2013 15:27:55 | Additive synthese waveform generator | Freddy | The script is updated to meet the new web audio API specs. And works again on Chrome. But the sound doesn't seem to work after updating an iPad to the new iOS 7. Not sure what is going on. |
| 21 okt 2013 19:59:24 | Theory and Definitions | Freddy | Dear george, I answered you via email. |