Estimation of Parasitic Resistance of Electrolytic Capacitor and Filter Inductor and Prediction of Input Filter Induced Oscillations in a Switch-Mode Magnet Power Supply

Table 1

Parameters of the prototype supply.

Parameters	Values
,	100 A, 20 V
Input ac mains	415 V, three-phase, 50 Hz
Transformer	415 : 23 V, DY11
,	1 mH, 2 mΩ (measured)
,	40 mF, 4 mΩ (estimated)
	50 μH
	10 μF
	2 Ω
	20 μF
	0.2 Ω
	Variable depending on actual magnet load, 2.6 mH in the test setup