DC Drive _ Output Current
DC Drive _ Output Current
(OP)
Dear experts
I am trying to calculate the output current of a DC Drive by measuring the input voltage, input current and output voltage
Input Power x %ef = Output Power
%ef = efficiency %
What is a typical %ef of a DC Drive?
I am trying to calculate the output current of a DC Drive by measuring the input voltage, input current and output voltage
Input Power x %ef = Output Power
%ef = efficiency %
What is a typical %ef of a DC Drive?





RE: DC Drive _ Output Current
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RE: DC Drive _ Output Current
I am unsure if you are looking at a specific drive, but the manual(s) for it should have the rating in it.
RE: DC Drive _ Output Current
All you need to do is to find what the rectification does to the AC RMS and see what the resulting DC level is.
That has been done by others, so you don't have to do it. The result is (for practical purposes) that Iac=.82*Idc. The relation holds for continuous DC current and there is some dependency on firing angle and grid impedance, but for practical purposes 1000 A DC will take 820 A AC from the grid.
For total AC current, you need to add excitation and auxiliary power.
Gunnar Englund
www.gke.org
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