A.C. - D.C. power converter for D.C. load
First Claim
1. A power converter for regulating electric power supplied from a power source to a D.C. load, comprising a group of controlled rectifiers arranged to constitute a plurality of series circuits each including at least two said controlled rectifiers, said series circuits of said controlled rectifiers being connected in parallel to provide A.C. terminals at the series connection points of said controlled rectifiers and to provide D.C. terminals at the parallel connection points of said series circuits, a rectifier interposed between said parallel-connected series circuits of said controlled rectifiers, and a series circuit of a reactor and a capacitor connected in parallel with said series circuits of said controlled rectifiers.
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Accused Products
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.
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Citations
6 Claims
- 1. A power converter for regulating electric power supplied from a power source to a D.C. load, comprising a group of controlled rectifiers arranged to constitute a plurality of series circuits each including at least two said controlled rectifiers, said series circuits of said controlled rectifiers being connected in parallel to provide A.C. terminals at the series connection points of said controlled rectifiers and to provide D.C. terminals at the parallel connection points of said series circuits, a rectifier interposed between said parallel-connected series circuits of said controlled rectifiers, and a series circuit of a reactor and a capacitor connected in parallel with said series circuits of said controlled rectifiers.
Specification