Kinetis Microcontrollers中的主题 Re: Power factor calculation for metering application https://community.nxp.com/t5/Kinetis-Microcontrollers/Power-factor-calculation-for-metering-application/m-p/584673#M34520 <HTML><HEAD></HEAD><BODY><P>Hi, Bharath,</P><P></P><P>In my opinion, the power factor is an angle, so it should be arccos(P/sqrt(P**2+Q**2)),P is active energy, Q is reactive energy, do you use the formula to compute it?</P><P>BR</P><P>Xiangjun rong</P></BODY></HTML> Wed, 29 Jun 2016 06:34:22 GMT xiangjun_rong 2016-06-29T06:34:22Z Power factor calculation for metering application https://community.nxp.com/t5/Kinetis-Microcontrollers/Power-factor-calculation-for-metering-application/m-p/584672#M34519 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I have been using the metering library on KM14Z board. Currently I am facing problem in calculating the power factor using the Filter based algorithm of metering library. There are no API's available to calculate the power factor, therefore I am calculating it by dividing Active power with S(VA).</P><P>PF = P(Watts)/S(VA).</P><P></P><P>This calculation gives me wrong results. Could someone guide me on this issue.</P><P></P><P>Thanks in advance.</P></BODY></HTML> Tue, 28 Jun 2016 11:50:06 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Power-factor-calculation-for-metering-application/m-p/584672#M34519 bharathpoonja 2016-06-28T11:50:06Z Re: Power factor calculation for metering application https://community.nxp.com/t5/Kinetis-Microcontrollers/Power-factor-calculation-for-metering-application/m-p/584673#M34520 <HTML><HEAD></HEAD><BODY><P>Hi, Bharath,</P><P></P><P>In my opinion, the power factor is an angle, so it should be arccos(P/sqrt(P**2+Q**2)),P is active energy, Q is reactive energy, do you use the formula to compute it?</P><P>BR</P><P>Xiangjun rong</P></BODY></HTML> Wed, 29 Jun 2016 06:34:22 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/Power-factor-calculation-for-metering-application/m-p/584673#M34520 xiangjun_rong 2016-06-29T06:34:22Z