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fancy102
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Joined: 23-November 07
Profile Views: 389*
Last Seen: 22nd March 2008 - 04:20 AM
Local Time: Mar 12 2010, 12:15 AM
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11 Mar 2008
i am carrying out power factor measurement andi need to know the power quality... my problem is how can i know wheather the current is leading or lagging the voltage??i can only know it through ossiloscope?got any other way to know leading or lagging?thanks
8 Mar 2008
hi,
i am currently carrying out power factor measurement system. If my load is pure resistive, i could get unity power factor. However, when my load is pure capasitive, i cant get phase shift of 90 degrees. My phase shift will change to different value depends on my capasitive value. For 1micro Farad, i get 80 degree,power factor =0.19. For 6 Micro FArad, i get 33 degree, power factor 0.83 Is it the capasitive value will change my power factor? But the theory stated that if pure capasitive or pure inductive load, there will be phase shift of 90 degrees.Is it practical and theory have difference?I am confused about this. Thanks
23 Nov 2007
hi..I would like to construct a circuit that can measure the power factor of a system. I would like to use comparator, analogue switch and PIC controller to measure the power factor..the output of the analogue switch is voltage(analogue form)
So,my problem is how to measure the current of the system so that i can get the voltage and current to measure the power factor?thanks |
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Lo-Fi Version | Time is now: 11th March 2010 - 11:15 PM |
