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Polarized and non-polarized saturable reactors

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Contents

The present paper analyses the performance of the saturable core with and without external polarization. For the circuit without external control, positive and negative saturation are discussed; for the circuit with d. c. excitation three cases are pointed out: underexcitation; critical ecxitation and overexcitation. The various saturation and desaturation angles are computed and their physical meaning is discussed along with the relevant explanations pertaining to current amplification. Experimental results are quoted.

Übersicht

Die vorliegende arbeit untersucht die Wirkungsweise der gesättigten Drossel mit und ohne äußerer Gleichstromvormagnetisierung. Für die Grundschaltung ohne äußerer Polarisierung, wird die Wirkungsweise bei positiver und negativer Sättigung erklärt; für die Schaltung mit äußerem Gleichstrom werden die folgenden drei Fälle untersucht: nicht-kritische Erregung; kritische Erregung; überkritische Erregung. Die verschiedenen Sättigungs- und Entsättigungswinkel sind errechnet und deren physikalische Deutung ist erläutert. Ferner wird die Stromverstärkung untersucht und zum Schluß werden experimentelle Ergebnisse vorgelegt.

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Abbreviations

A :

Cross section of core

C :

Integration constant

\(\bar I_a\) :

Mean value of load current

I c :

Control current

I cs :

Saturation control current

i a :

Instantaneous load current

K i :

Current amplification factor

L a :

Power-coil self-inductivity

l :

Magnetic path length

N a :

Number of power-coil turns

N c :

Number of control-coil turns

R L :

Load resistance

\(\hat V\) :

Supply voltage, maximum value

\(\hat V_s\) :

Saturation voltage

t :

Time

α 1 :

Positive saturation angle

α 2 :

Positive desaturation angle

β 1 :

Negative saturation angle

β 2 :

Negative desaturation angle

ζ:

Dummy variable

μ:

Permeability

ν:

Relative voltage

Φ:

Magnetic flux

Φ s :

Saturation magnetic flux

w :

Angular frequency of supply

References

  1. Kümmel, F.: Regel-Transduktoren. Berlin: Springer 1961.

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  2. Gabler, H., J. Haskovec u.E. Tomanek: Magnetische Verstärker. Berlin; VEB Verlag Technik 1960.

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  3. Schieber, D., J. Ben Uri, u.M. S. Erlicki: A New Static Magnetic Constant Current Transformer. IEEE Trans. Power App. Syst., Aug. 1965, Vol. PAS- 84, No. 8, pp. 691–699.

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  4. Ben Uri, J., M. S. Erlicki u.D. Schieber: Series Magnetic Amplifier. Isarel J. of Technology 3, No. 2 (1965).

  5. Bogucki, M.: Analysis of Magnetic Amplifier Properties. Warszawa: P.W.N., 1960.

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Author notes

  1. D. Schieber

    Present address: Faculty of Electrical Engineering, Israel Institute of Technology, Haifa, (Israel)

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    1. D. Schieber
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    Schieber, D. Polarized and non-polarized saturable reactors. Archiv f. Elektrotechnik 51, 281–288 (1968). https://doi.org/10.1007/BF01576328

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    • DOI: https://doi.org/10.1007/BF01576328

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