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Nishant
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Join Date: Aug 2007
Location: INDIA
Posts: 58

How drive show Current

08/19/2007 5:50 PM

In sensor less drive How drive show Current of motor ? C.T. is not connected ?

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JRaef
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United States - Member - New Member Engineering Fields - Power Engineering - New Member

Join Date: Sep 2006
Location: California, USA, where the Godless live next door to God.
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#1

Re: How drive show Current

08/20/2007 1:45 AM

Most drives do not use CTs because they are inherently inaccurate in a harmonic rich environment. VFDs typically use Hall Effect transducers to determine output current.

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Syed Ziauddin
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Join Date: Jul 2007
Posts: 37
#2

Re: How drive show Current

08/22/2007 7:06 AM

I have experience of dealing faults in Siemens Simovert Master Drives, Fuji Frenic Drives and Danfoss VLT Drives, all three uses C.Ts at output to measure current.
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