A.C. - D.C. power converter for D.C. load

Details A.C. - D.C. power converter for D.C. load A.C. - D.C. power converter for D.C. load

1974-12-24

1976-02-24

Shoop, William M.

Railways

Droppings catcher

104148R, 104148LM, 191 5, 318138, 318441, 318506, 321 45C, H02M 700

Patent

active

039406806

ABSTRACT:
A power converter which can operate with both a D.C. power source and an A.C. power source for supplying electric power to a D.C. load such as a D.C. motor. The power converter comprises thyristors, a diode, a reactor and a capacitor. A plurality of series circuits each including two series-connected thyristors are connected in parallel to provide A.C. terminals at the series connection points of the thyristors and to provide D.C. terminals at the parallel connection points of the series circuits. The diode is interposed between the parallel-connected series circuits of the thyristors, and the reactor and the capacitor are connected in series to form a series circuit which is connected in parallel with the series circuits of the thyristors. The power converter is connected at the D.C. terminals between the power source and the load to function as a chopper when the power source supplies D.C. power to the load. On the other hand, when the power source supplies A.C. power to the load, the power converter is connected at the A.C. terminals to the power source and at the D.C. terminals to the load to function as a converter or inverter. The desired function of the power converter is obtained by controlling the gate signal applied to the gate of each of the thyristors.

REFERENCES:
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patent: 3262037 (1966-07-01), McCabe et al.
patent: 3321685 (1967-05-01), Johannes
patent: 3434034 (1969-03-01), Garber et al.
patent: 3577929 (1971-05-01), Onoda et al.
patent: 3659119 (1972-04-01), Kasama et al.
patent: 3739186 (1973-06-01), Gokey et al.
patent: 3761793 (1973-09-01), Naito
patent: 3781645 (1973-12-01), Grom et al.
patent: 3794893 (1974-02-01), Arpino

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