Circuit arrangement for switching a current in an inductive load

Details Circuit arrangement for switching a current in an inductive load Circuit arrangement for switching a current in an inductive load

1985-07-22

1987-02-10

Wong, Peter S.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 21, H02H 7122

Patent

active

046427503

ABSTRACT:
A circuit arrangement for switching a current through an inductive load includes at least one semiconductor switch which periodically switches the current through the load at a switching frequency. The main current path of the semiconductor switch is switched alternately to the conductive and to the non-conductive state. The semiconductor switch has a parasitic capacitance and has connected parallel to it a voltage-limiting element for limiting the voltage applied to it. An increase of the switching frequency is attained with simultaneous operation of the circuit arrangement with minimum losses in the semiconductor switch by using a voltage-limiting element (20, 21) which has an inductive input impedance at the switching frequency.

REFERENCES:
patent: 3495183 (1970-02-01), Doundoulakis et al.
patent: 4276588 (1981-06-01), McLyman et al.
patent: 4318164 (1982-03-01), Onodera et al.
patent: 4489373 (1984-12-01), du Parc
Ebert et al., "Class E High-Efficiency Tuned Power Oscillator", IEEE Journal of Solid State Circuits, vol. SC-16, No. 2, Apr. 1981, pp. 62-65.
Sokal et al., "Class E-A New Class of High Efficiency Tuned Single-Ended Switching Power Amplifiers", IEEE Journal of Solid State Circuits, vol. SC-10, No. 3, Jun. 1975, pp. 168-176.

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