.707 is the reciprocal of 1.414 The RMS value is the DC heating value. Well filtered is proportional to capacitance in the filter.
He said: Someone I respect in electronics stated that a simple AC -> DC filtered rectification circuit results in the output VDC being 1.7 the input VAC. If this person said 1.414 minus the diode drop it would be correct. This would be for a meter or instrumentation load. A DC meter could be used to measure the AC voltage. It is actually measuring the peak and is insensitive to waveshape. If Neil voiced what he is trying to do with this peak detector it would be easier to give commentary. Kirk -----Original Message----- From: John Mullan [mailto:[EMAIL PROTECTED] Sent: Sunday, February 09, 2003 3:00 PM To: biofuel@yahoogroups.com Subject: RE: [biofuel] AC -> DC Actually, he is likely thinking the RMS calculation of which 120VAC RMS would be 120 x 1.414 = Peak voltage and Peak voltage x .707 to get RMS. You would be much closer using the 120 x .707 to get a well filtered DC voltage. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: February 8, 2003 4:33 PM To: biofuel@yahoogroups.com Subject: [biofuel] AC -> DC I am looking at WVO fueled diesel powered home/shop co-generation options. The thinking process came up a design idea where some 120VAC would be converted to ?VDC. Someone I respect in electronics stated that a simple AC -> DC filtered rectification circuit results in the output VDC being 1.7 the input VAC. This does not seem right to me and while I could go buy the components to test the hypothesis, I would prefer someone either confirm or refute the x1.7 claim. I searched the internet and my books without success; so, I pose it here as defined: ac_dc.jpg If input is 120VAC, then will the output be = 120VDC, x1.7 = 204VDC, or = something else? Assume simple filtering by capacitors and inductors with reasonable component quality as this is more theoretical than absolute precision real-world design at this stage. Personally, I would think it would be 120VDC while if it were 204VDC it would be very nice for my application. Maybe someone knows a good web site to provide the answer to this simple electricity circuit. [Non-text portions of this message have been removed] Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.449 / Virus Database: 251 - Release Date: 1/27/2003 Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
