Re: Passive PFC (original post by lfresea...@aol.com)
But when is A14 expected to be entered into the Official Journal? Quoting from the Sep/Oct 2000 issue of Approval Magazine (page 6): "The mains harmonic standard continues to be a headache for industry, despite the best efforts of the standards bodies. EN61000-3-2 effectively becomes mandatory from 1 January 2001, and although a much clearer, easier to use version has been approved, it is unlikely to appear in the Official Journal before the middle of next year." = plaw...@west.net (Patrick Lawler) on 12/12/2000 03:07:41 PM Please respond to plaw...@west.net (Patrick Lawler) To: EMC-PSTC cc:(bcc: Robert E. Heller/US-Corporate/3M/US) Subject: Re: Passive PFC (original post by lfresea...@aol.com) I was getting ahead of myself (and the standard). Yes, there is a transistion period. Apparently, until January 2004 you can choose to use ammendment 14 or not. The CENELEC web site reports: DOR 2000-10-03 DAV 2000-10-19 DOA 2000-12-01 DOP 2001-01-01 DOW 2004-01-01 On Tue, 12 Dec 2000 11:31:39 -0600, "Lesmeister, Glenn" wrote: >...and thus you might not comply. Has the new A14 been given a DOP and DOW? >I haven't seen it yet. Normally, when new requirements are published there >is a DOW for existing requirements. Isn't it typically about 4 years? If >you've been gearing up to meet the existing EN61000-3-2 how could you be >expected to have this rug pulled out from under you on and immediate basis? > > >Regards, > >Glenn Lesmeister >Product Regulatory Compliance > >Compaq Computer Corp.Tel: 281-514-5163 >20555 SH 249, MS60607Fax: 281-514-8029 >Houston, TX 77070-2698 Pgr: 713-786-4930 >glenn.lesmeis...@compaq.com > >"I am empowered to do what makes sense!" > > -Original Message- >From:plaw...@west.net [mailto:plaw...@west.net] >Sent:Tuesday, December 12, 2000 10:58 AM >To: EMC-PSTC >Subject: Re: Passive PFC (original post by lfresea...@aol.com) > > >When systems are tested using these techniques, make sure the latest >version of EN61000-3-2 is used, incorporating Ammendment 14. > >Previously, simple techniques could be used to modify the input >current waveform, and distort it outside the 'special waveform' >envelope shown in figure 1 of the standard. >This enabled you to use the less-stringent Class A limits. > >With the incorporation of Ammendment 14, there is no evaluation of the >input current waveform to determine the test limit. The application >alone will determine the test limit used. > > >Patrick Lawler >plaw...@west.net > > >On Tue, 12 Dec 2000 10:03:50 +1100, Jon Keeble > wrote: >>You may be interested in a paper >> >>Power Factor Correction for AC-DC Converters with Cost Effective Inductive >>Filtering >> >>by >> >>W.Wölfle Convertec Ltd., Wexford, IRELAND >>W.G.Hurley National University of Ireland Galway, IRELAND >>S.Arnold Enserb Bordeaux, FRANCE >> >>To quote the conclusion: >> >>This paper presents a new, simple and cost effective solution >>for the power factor correction of the input current of a >>switch mode power supply, which meets the IEC limits on >>harmonic distortion. A sloped air-gap inductor, which adapts >>its inductance values to the input current conditions of the >>power supply, is used to shape the current to comply with the >>limits for harmonic distortions as defined in EN61000-3-2. >> >>It is shown that using a classical inductor design, the filter >>inductor is too bulky, whereas the volume of the sloped air-gap >>choke is as small as the switching transformer of the >>power (e.g.100 kHz) supply. In fact, the volume required is >>not bigger then that required for an active PFC circuit, but at >>a fraction of the cost. >> >>The .pdf is too large to post, but I'll mail a copy to the first ten >>callers ... >> >>Seasonal Greetings >> >>- >>Jon Keeble >>Fairlight >>Hardware Engineering Manager >>8977 9931 >>j.kee...@fairlightesp.com.au > > >--- >This message is from the IEEE EMC Society Product Safety >Technical Committee emc-pstc discussion list. > >To cancel your subscription, send mail to: > majord...@ieee.org >with the single line: > unsubscribe emc-pstc > >For help, send mail to the list administrators: > Jim Bacher: jim_bac...@mail.monarch.com > Michael Garretson:pstc_ad...@garretson.org > >For policy questions, send mail to: > Richard Nute:
Re: Passive PFC (original post by lfresea...@aol.com)
I was getting ahead of myself (and the standard). Yes, there is a transistion period. Apparently, until January 2004 you can choose to use ammendment 14 or not. The CENELEC web site reports: DOR 2000-10-03 DAV 2000-10-19 DOA 2000-12-01 DOP 2001-01-01 DOW 2004-01-01 On Tue, 12 Dec 2000 11:31:39 -0600, "Lesmeister, Glenn" wrote: >...and thus you might not comply. Has the new A14 been given a DOP and DOW? >I haven't seen it yet. Normally, when new requirements are published there >is a DOW for existing requirements. Isn't it typically about 4 years? If >you've been gearing up to meet the existing EN61000-3-2 how could you be >expected to have this rug pulled out from under you on and immediate basis? > > >Regards, > >Glenn Lesmeister >Product Regulatory Compliance > >Compaq Computer Corp. Tel: 281-514-5163 >20555 SH 249, MS60607 Fax: 281-514-8029 >Houston, TX 77070-2698Pgr: 713-786-4930 >glenn.lesmeis...@compaq.com > >"I am empowered to do what makes sense!" > > -Original Message- >From: plaw...@west.net [mailto:plaw...@west.net] >Sent: Tuesday, December 12, 2000 10:58 AM >To:EMC-PSTC >Subject: Re: Passive PFC (original post by lfresea...@aol.com) > > >When systems are tested using these techniques, make sure the latest >version of EN61000-3-2 is used, incorporating Ammendment 14. > >Previously, simple techniques could be used to modify the input >current waveform, and distort it outside the 'special waveform' >envelope shown in figure 1 of the standard. >This enabled you to use the less-stringent Class A limits. > >With the incorporation of Ammendment 14, there is no evaluation of the >input current waveform to determine the test limit. The application >alone will determine the test limit used. > > >Patrick Lawler >plaw...@west.net > > >On Tue, 12 Dec 2000 10:03:50 +1100, Jon Keeble > wrote: >>You may be interested in a paper >> >>Power Factor Correction for AC-DC Converters with Cost Effective Inductive >>Filtering >> >>by >> >>W.Wölfle Convertec Ltd., Wexford, IRELAND >>W.G.Hurley National University of Ireland Galway, IRELAND >>S.Arnold Enserb Bordeaux, FRANCE >> >>To quote the conclusion: >> >>This paper presents a new, simple and cost effective solution >>for the power factor correction of the input current of a >>switch mode power supply, which meets the IEC limits on >>harmonic distortion. A sloped air-gap inductor, which adapts >>its inductance values to the input current conditions of the >>power supply, is used to shape the current to comply with the >>limits for harmonic distortions as defined in EN61000-3-2. >> >>It is shown that using a classical inductor design, the filter >>inductor is too bulky, whereas the volume of the sloped air-gap >>choke is as small as the switching transformer of the >>power (e.g.100 kHz) supply. In fact, the volume required is >>not bigger then that required for an active PFC circuit, but at >>a fraction of the cost. >> >>The .pdf is too large to post, but I'll mail a copy to the first ten >>callers ... >> >>Seasonal Greetings >> >>- >>Jon Keeble >>Fairlight >>Hardware Engineering Manager >>8977 9931 >>j.kee...@fairlightesp.com.au > > >--- >This message is from the IEEE EMC Society Product Safety >Technical Committee emc-pstc discussion list. > >To cancel your subscription, send mail to: > majord...@ieee.org >with the single line: > unsubscribe emc-pstc > >For help, send mail to the list administrators: > Jim Bacher: jim_bac...@mail.monarch.com > Michael Garretson:pstc_ad...@garretson.org > >For policy questions, send mail to: > Richard Nute: ri...@ieee.org > > >--- >This message is from the IEEE EMC Society Product Safety >Technical Committee emc-pstc discussion list. > >To cancel your subscription, send mail to: > majord...@ieee.org >with the single line: > unsubscribe emc-pstc > >For help, send mail to the list administrators: > Jim Bacher: jim_bac...@mail.monarch.com > Michael Garretson:pstc_ad...@garretson.org > >For policy questions, send mail to: > Richard Nute: ri...@ieee.org > > --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: Passive PFC (original post by lfresea...@aol.com)
...and thus you might not comply. Has the new A14 been given a DOP and DOW? I haven't seen it yet. Normally, when new requirements are published there is a DOW for existing requirements. Isn't it typically about 4 years? If you've been gearing up to meet the existing EN61000-3-2 how could you be expected to have this rug pulled out from under you on and immediate basis? Regards, Glenn Lesmeister Product Regulatory Compliance Compaq Computer Corp. Tel: 281-514-5163 20555 SH 249, MS60607 Fax: 281-514-8029 Houston, TX 77070-2698 Pgr: 713-786-4930 glenn.lesmeis...@compaq.com "I am empowered to do what makes sense!" -Original Message- From: plaw...@west.net [mailto:plaw...@west.net] Sent: Tuesday, December 12, 2000 10:58 AM To: EMC-PSTC Subject:Re: Passive PFC (original post by lfresea...@aol.com) When systems are tested using these techniques, make sure the latest version of EN61000-3-2 is used, incorporating Ammendment 14. Previously, simple techniques could be used to modify the input current waveform, and distort it outside the 'special waveform' envelope shown in figure 1 of the standard. This enabled you to use the less-stringent Class A limits. With the incorporation of Ammendment 14, there is no evaluation of the input current waveform to determine the test limit. The application alone will determine the test limit used. Patrick Lawler plaw...@west.net On Tue, 12 Dec 2000 10:03:50 +1100, Jon Keeble wrote: >You may be interested in a paper > >Power Factor Correction for AC-DC Converters with Cost Effective Inductive >Filtering > >by > >W.Wölfle Convertec Ltd., Wexford, IRELAND >W.G.Hurley National University of Ireland Galway, IRELAND >S.Arnold Enserb Bordeaux, FRANCE > >To quote the conclusion: > >This paper presents a new, simple and cost effective solution >for the power factor correction of the input current of a >switch mode power supply, which meets the IEC limits on >harmonic distortion. A sloped air-gap inductor, which adapts >its inductance values to the input current conditions of the >power supply, is used to shape the current to comply with the >limits for harmonic distortions as defined in EN61000-3-2. > >It is shown that using a classical inductor design, the filter >inductor is too bulky, whereas the volume of the sloped air-gap >choke is as small as the switching transformer of the >power (e.g.100 kHz) supply. In fact, the volume required is >not bigger then that required for an active PFC circuit, but at >a fraction of the cost. > >The .pdf is too large to post, but I'll mail a copy to the first ten >callers ... > >Seasonal Greetings > >- >Jon Keeble >Fairlight >Hardware Engineering Manager >8977 9931 >j.kee...@fairlightesp.com.au --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Re: Passive PFC (original post by lfresea...@aol.com)
When systems are tested using these techniques, make sure the latest version of EN61000-3-2 is used, incorporating Ammendment 14. Previously, simple techniques could be used to modify the input current waveform, and distort it outside the 'special waveform' envelope shown in figure 1 of the standard. This enabled you to use the less-stringent Class A limits. With the incorporation of Ammendment 14, there is no evaluation of the input current waveform to determine the test limit. The application alone will determine the test limit used. Patrick Lawler plaw...@west.net On Tue, 12 Dec 2000 10:03:50 +1100, Jon Keeble wrote: >You may be interested in a paper > >Power Factor Correction for AC-DC Converters with Cost Effective Inductive >Filtering > >by > >W.Wölfle Convertec Ltd., Wexford, IRELAND >W.G.Hurley National University of Ireland Galway, IRELAND >S.Arnold Enserb Bordeaux, FRANCE > >To quote the conclusion: > >This paper presents a new, simple and cost effective solution >for the power factor correction of the input current of a >switch mode power supply, which meets the IEC limits on >harmonic distortion. A sloped air-gap inductor, which adapts >its inductance values to the input current conditions of the >power supply, is used to shape the current to comply with the >limits for harmonic distortions as defined in EN61000-3-2. > >It is shown that using a classical inductor design, the filter >inductor is too bulky, whereas the volume of the sloped air-gap >choke is as small as the switching transformer of the >power (e.g.100 kHz) supply. In fact, the volume required is >not bigger then that required for an active PFC circuit, but at >a fraction of the cost. > >The .pdf is too large to post, but I'll mail a copy to the first ten >callers ... > >Seasonal Greetings > >- >Jon Keeble >Fairlight >Hardware Engineering Manager >8977 9931 >j.kee...@fairlightesp.com.au --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Passive PFC (original post by lfresea...@aol.com)
You may be interested in a paper Power Factor Correction for AC-DC Converters with Cost Effective Inductive Filtering by W.Wölfle Convertec Ltd., Wexford, IRELAND W.G.Hurley National University of Ireland Galway, IRELAND S.Arnold Enserb Bordeaux, FRANCE To quote the conclusion: This paper presents a new, simple and cost effective solution for the power factor correction of the input current of a switch mode power supply, which meets the IEC limits on harmonic distortion. A sloped air-gap inductor, which adapts its inductance values to the input current conditions of the power supply, is used to shape the current to comply with the limits for harmonic distortions as defined in EN61000-3-2. It is shown that using a classical inductor design, the filter inductor is too bulky, whereas the volume of the sloped air-gap choke is as small as the switching transformer of the power (e.g.100 kHz) supply. In fact, the volume required is not bigger then that required for an active PFC circuit, but at a fraction of the cost. The .pdf is too large to post, but I'll mail a copy to the first ten callers ... Seasonal Greetings - Jon Keeble Fairlight Hardware Engineering Manager 8977 9931 j.kee...@fairlightesp.com.au _ The bounds of Time, Space or Mechanics should never stand in the way of a perfectly good idea... --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
