Re: AW: Re: AW: Re: Aw: Re: [EVGRAY] Ferroresonance amplified by piezoelectric elements

Body

Sven, As far as I know yes they do.  COG NPO capacitors are made of a
very stable ceramic and are claimed not to be piezo electric but I have
had problems with them being micro-phonic and have made them squeal so I
believe them to be piezo.  COG are cheaper so easy to prototype with but
when you know your sizes that work buy some silver mica!

http://www.avx.com/products/ceramic-capacitors/surface-mount/c0g-np0-dielectric/


On 10/2/2018 2:27 PM, SF [email protected] [EVGRAY] wrote:
>  
>
>
> Hi Mick, in other words Mica silver or Mica capacitors have the same
> effect as piezo materials, what is cog? Because I with low frequencies
> work do I need already capacities in uf area. Under Mica can I find
> what. Greetings Sven
>
> Von meinem Samsung Gerät gesendet.
>
>
> -------- Ursprüngliche Nachricht --------
> Von: "Mick [email protected] [EVGRAY]" <[email protected]>
> Datum: 02.10.18 22:14 (GMT+01:00)
> An: [email protected]
> Betreff: Re: AW: Re: Aw: Re: [EVGRAY] Ferroresonance amplified by
> piezoelectric elements
>
>  
>
> Sven,
>
> Anytime one adds more capacitors Q drops as ESR increases so it works
> better if one can use the piezo for both functions, if possible.  Many
> capacitors are also piezoelectric materials such as the mica and COG. 
> Lower frequencies do not matter as much.
>
>
> On 10/2/2018 12:12 PM, SF [email protected] [EVGRAY] wrote:
>>  
>>
>> Hi Mick, so I could try in addition to the caps piezo elements for
>> this purpose to turn, there is there an increase of the q value or
>> did you only with piezo worked?
>>
>>
>>
>> Von meinem Samsung Gerät gesendet.
>>
>>
>> -------- Ursprüngliche Nachricht --------
>> Von: "Mick [email protected] [EVGRAY]" <[email protected]>
>> Datum: 02.10.18 18:00 (GMT+01:00)
>> An: [email protected]
>> Betreff: Re: Aw: Re: [EVGRAY] Ferroresonance amplified by
>> piezoelectric elements
>>
>>  
>>
>> Hi Sven
>>
>> Yes I have used the little piezo transformers and have also used
>> disks in a tank circuit acting as the capacitance.   On the
>> transformers I was able to get the most gain by using sine waves as
>> they like a clean signal without distortion components being of high
>> Q at the designed frequency. Something I need to get back to in order
>> to determine more facts.
>>
>>
>> On 10/2/2018 5:37 AM, [email protected] [EVGRAY] wrote:
>>>  
>>> Hello Mick,
>>>
>>> Many thanks for the hints, unfortunately I can not find distribution
>>> in Germany or I have to search again.
>>>
>>> Have you ever included piezo elements in a reactive circuit?
>>>
>>> regards
>>>
>>> Sven
>>>  
>>> *Gesendet:* Montag, 01. Oktober 2018 um 21:01 Uhr
>>> *Von:* "Mick [email protected] [EVGRAY]" <[email protected]>
>>> *An:* [email protected]
>>> *Betreff:* Re: [EVGRAY] Ferroresonance amplified by piezoelectric
>>> elements
>>>  
>>>
>>>  
>>>
>>> Sven
>>>
>>> Have a look here:
>>>
>>> http://steminc.com/
>>>
>>> http://iopscience.iop.org/article/10.7567/JJAP.55.086702
>>>
>>>  
>>> On 10/1/2018 7:57 AM, [email protected] [EVGRAY] wrote:
>>>
>>>      
>>>
>>>     Hello everyone, is it possible to use resonant capacitors in the
>>>     case of FR transformer in addition to switching piezo elements
>>>     in parallel or do the thin elements hold over 400V?
>>>
>>>     The MRA of Norman works with a large piezo element,
>>>     unfortunately I can not get something like this or I search
>>>     wrong via google.
>>>
>>>     regards
>>>
>>>     Sven
>>>
>>>  
>>>
>>>  
>>>
>>
>
>