07-19-2017, 02:06 PM
Well....let's try to do the first order calculation.
The rectified voltage is 320V. The dropout across the field coil's DC resistance of 1.7kOhm is 130V (down to 190V). We're lucky we have the numbers directly before and after.
This makes the total of 130V/1700 Ohm = 75mA.
Now each half-winding will conduct the same average current exactly 1/2 of the period that makes it 38mA average per half-winding.
Add a margin of say 50% (or whatever you are comfy with), this will make it 57mA. I'd say, that is enough.
(Almost radio engineer)
The rectified voltage is 320V. The dropout across the field coil's DC resistance of 1.7kOhm is 130V (down to 190V). We're lucky we have the numbers directly before and after.
This makes the total of 130V/1700 Ohm = 75mA.
Now each half-winding will conduct the same average current exactly 1/2 of the period that makes it 38mA average per half-winding.
Add a margin of say 50% (or whatever you are comfy with), this will make it 57mA. I'd say, that is enough.
(Almost radio engineer)
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