If the input to your supply is nonlinear, such as a simple rectifier and capacitor, you will draw current in pulses as the rectifier turns on and off. These load current pulses cause voltage drop pulses which are seen as voltage harmonics in the rest or the power system. Sherpa Doug > -----Original Message----- > From: Micro Eng [mailto:micro_eng@HOTMAIL.COM] > Sent: Thursday, March 21, 2002 12:37 PM > To: PICLIST@MITVMA.MIT.EDU > Subject: [EE]: Power supply questions: load factor & Harmonic > measurements > > > I stated it pretty much how the client stated it...so thats why I was > curious to see if it would get a response. Could there be > harmonics on the > output? As far as harmonics on the input, thats not a factor > of the supply > but the source. > > >From: Douglas Butler > >Reply-To: pic microcontroller discussion list > > >To: PICLIST@MITVMA.MIT.EDU > >Subject: Re: [EE]: Power supply questions: load factor & Harmonic > > measurements > >Date: Thu, 21 Mar 2002 12:14:29 -0500 > > > >Are you sure you want the harmonic measurement at the > OUTPUT? If so I > >am not sure what it is a harmonic of. You can also measure > harmonics at > >the INPUT. This input measurement relates to load factor and power > >factor of the input. > > > >This is not my area of expertise, so I will see if others > will give you > >some good answers. But I fear your question is mis-stated. > > > >Sherpa Doug > > > > > -----Original Message----- > > > From: Micro Eng [mailto:micro_eng@HOTMAIL.COM] > > > Sent: Thursday, March 21, 2002 11:57 AM > > > To: PICLIST@MITVMA.MIT.EDU > > > Subject: [EE]: Power supply questions: load factor & Harmonic > > > measurements > > > > > > > > > First off....what is meant exactly by a switching power > supplies load > > > factor...does this relate to power factor correction or is it > > > something > > > else? > > > > > > Second, for a switcher, how is the best/easiest way to > > > measure harmonics on > > > the output (or should there be any?) I assume there might be > > > some but not > > > sure of what the typical switcher frequency runs at either. > > > > > > Comments? > > > > > > _________________________________________________________________ > > > Send and receive Hotmail on your mobile device: http://mobile.msn.com > > > > -- > > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > > > > > > >-- >http://www.piclist.com#nomail Going offline? Don't AutoReply us! >email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > _________________________________________________________________ Send and receive Hotmail on your mobile device: http://mobile.msn.com -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body