I¹m not familiar with the 61000-4-16 standard and its limit. If the limit is flat and requires 30 Vrms oc output at 150 kHz, that would indeed be a problem if you had to do it with an audio amplifier, but of course that isn¹t necessary. Every lab has a 50 Ohm output amplifier that starts at 10 kHz. So the audio amp need only have flat performance out to 10 kHz, and they will all do that. Ken Javor
Phone: (256) 650-5261 From: <[email protected]> Date: Tue, 24 Jan 2012 17:06:27 -0800 To: <[email protected]> Subject: Re: [PSES] Power Amp for IEC 61000-4-16 1% THD all the way to 150kHz? Just wondering if the older analogue amps could do that, not to mention the (Class D?) amplifiers of today. Why not just put a 50 ohm resistor in series with the amplifier output. Audio amps should have no trouble operating into an open circuit. A 100W/ch amp should satisfy the 30Vrms requirement, but the THD might be a problem at the highest frequencies. ____________________________________________________________________________ ___ Ralph McDiarmid | Schneider Electric | Solar Business | CANADA | Regulatory Compliance Engineering From: Ken Javor <[email protected]> To: [email protected] Date: 01/24/2012 03:45 PM Subject: Re: [PSES] Power Amp for IEC 61000-4-16 Any decent quality audio power amplifier will have THD below 1% these days. Consider using a step-up transformer such as the Solar Electronics 8810-1. It is designed to impedance match from 1.5 Ohms to 50 Ohms, and can handle 200 Watts. That will more than suffice for your needs. Ken Javor Phone: (256) 650-5261 > From: <[email protected]> > Date: Tue, 24 Jan 2012 15:30:55 -0800 > To: <[email protected]> > Subject: Power Amp for IEC 61000-4-16 > > A new testing requirement for some of my company's products is IEC > 61000-4-16 Conducted Common Mode Disturbances. I need to test from 10 kHz > to 150 kHz. > > I have a good low distortion signal source, but I need a power amplifier > to give me the signal at the test level: 30 Vrms open circuit, 50±5 ohms > source impedance, total harmonic distortion below 1%. While this sounds > like something not far beyond the capability of a good audio amplifier > (with a series 50 ohm resistor at the output), it is proving rather > difficult to find such an amplifier. Amplifier Research and Techron both > have amplifiers that are close but not quite there (either voltage swing > or distortion). > > I can buy complete solutions from EM Test, Frankonia, EMC Partner, and HV > Technologies. But I believe that there must be a power amplifier out there > that can do the job. > > Ideas anyone? > > Donald Borowski > EMC Compliance Engineer > Schweitzer Engineering Labs > Pullman, WA, USA > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <[email protected]> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html <http://www.ieee-pses.org/emc-pstc.html> > > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ <http://product-compliance.oc.ieee.org/> can be used for graphics (in well-used > formats), large files, etc. > > Website: http://www.ieee-pses.org/ <http://www.ieee-pses.org/> > Instructions: http://listserv.ieee.org/request/user-guide.html <http://listserv.ieee.org/request/user-guide.html> > List rules: http://www.ieee-pses.org/listrules.html <http://www.ieee-pses.org/listrules.html> > > For help, send mail to the list administrators: > Scott Douglas <[email protected]> > Mike Cantwell <[email protected]> > > For policy questions, send mail to: > Jim Bacher: <[email protected]> > David Heald: <[email protected]> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html <http://www.ieee-pses.org/emc-pstc.html> Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ <http://product-compliance.oc.ieee.org/> can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ <http://www.ieee-pses.org/> Instructions: http://listserv.ieee.org/request/user-guide.html <http://listserv.ieee.org/request/user-guide.html> List rules: http://www.ieee-pses.org/listrules.html <http://www.ieee-pses.org/listrules.html> For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]> ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. ______________________________________________________________________ - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
