delorie.com/archives/browse.cgi   search  
Mail Archives: geda-user/2018/02/16/00:33:47

X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient: geda-user AT delorie DOT com
MIME-Version: 1.0
Date: Fri, 16 Feb 2018 06:32:03 +0100
From: mhx AT iae DOT nl
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] (Off-topic) Question wrt driving HV piezo transducer
In-Reply-To: <da435a2d-0bd0-f6d7-7d9a-05394665621c@linetec.nl>
References: <c3aa1897-3806-3f72-feef-85551a63c2db AT linetec DOT nl>
<alpine DOT DEB DOT 2 DOT 00 DOT 1802091235090 DOT 12270 AT igor2priv>
<6221de93-bb98-d397-79b4-eecf3975c2e6 AT linetec DOT nl>
<alpine DOT DEB DOT 2 DOT 00 DOT 1802091324350 DOT 12270 AT igor2priv>
<f2259553-7015-8fc8-33b2-8ca8be6c5a45 AT linetec DOT nl>
<alpine DOT DEB DOT 2 DOT 00 DOT 1802091427450 DOT 12270 AT igor2priv>
<20180209161532 DOT 6AF57804CEFA AT turkos DOT aspodata DOT se>
<alpine DOT DEB DOT 2 DOT 00 DOT 1802091735590 DOT 12270 AT igor2priv>
<20180209204934 DOT CAA35804CEFA AT turkos DOT aspodata DOT se>
<alpine DOT DEB DOT 2 DOT 00 DOT 1802100406500 DOT 12270 AT igor2priv>
<b125c1d5-48a1-c1dc-3ee1-db9875d50bf6 AT linetec DOT nl>
<c49d734f1b1f6373733e6f9935afff35 AT iae DOT nl>
<da435a2d-0bd0-f6d7-7d9a-05394665621c AT linetec DOT nl>
Message-ID: <aeedf5b6a230f39abdc82845a57a8b1b@iae.nl>
X-Sender: mhx AT iae DOT nl
User-Agent: Roundcube Webmail/1.2.4
ClaraMail2-Webmail-AuthUser: mhx AT iae DOT nl
Reply-To: geda-user AT delorie DOT com
Errors-To: nobody AT delorie DOT com
X-Mailing-List: geda-user AT delorie DOT com
X-Unsubscribes-To: listserv AT delorie DOT com

On 2018-02-15 23:02, Richard Rasker (rasker AT linetec DOT nl) [via 
geda-user AT delorie DOT com] wrote:
[..]
> However, this afternoon, the product dealer was kind enough to send me
> the schematic of a 500 Vpp development driver kit, featuring a
> center-tapped symmetrical push-pull transformer(*) circuit with two
> FDD16AN08 MOSFETs, each with a 1 uF capacitor across drain-source.
> These big DS-caps seem rather weird already.
[..]

This could be a push-pull parallel-resonant parallel-load type 
configuration.
It should be tuned to exactly the resonance of the effective L+C and 
will have
a Vds of about 3.14159 times the supply voltage. The transistors turn on 
when
their Vds tries to go negative (automatically). The 1uF across drain 
source does
not sound familiar but is equivalent to a single cap between the two 
sources,
i.e. in parallel to the transformed transducer (as it should be).
Theoretically, this is the dual circuit to the HB series resonance 
series load
one.

> Richard

- Raw text -


  webmaster     delorie software   privacy  
  Copyright © 2019   by DJ Delorie     Updated Jul 2019