DC convertor

Details DC convertor DC convertor

1975-10-17

1977-05-31

Pellinen, A. D.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

318345R, 323 77, H02M 114

Patent

active

040272257

ABSTRACT:
A convertor for supplying a load with direct voltage pulses of variable frequency includes input terminals for connection to a DC source and a main circuit, with a filter circuit connected between the input terminals and the main circuit. The filter circuit includes a capacitive parallel branch and a series inductor connected between one of the input terminals and the capacitive parallel branch. A resistor for reducing the Q-value of the filter circuit is connected in parallel with the series inductor. A second series inductor may be connected in series with the parallel connection of the first series inductor and the resistor. The first series inductor has an inductance which, at low current values, is larger than that of the second inductor.

REFERENCES:
patent: 2710938 (1955-06-01), Lee
patent: 2730667 (1956-01-01), Uhlmann
patent: 3291960 (1966-12-01), Folkhard et al.
patent: 3308311 (1967-03-01), Swanson
patent: 3583089 (1976-01-01), Maddox
patent: 3710284 (1973-01-01), Uhlmann
patent: 3745440 (1973-07-01), Lord
patent: 3758840 (1973-09-01), Oliver
patent: 3859542 (1975-01-01), Kennedy

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