Power converter having first and second power conversion units with thyristors
First Claim
1. A power converter comprising first and second power conversion units that are connected to each other by a d.c. reactor,wherein the first power conversion unit has arms consisting of thyristors connected in a bridge configuration, and the second power conversion unit comprises a thyristor-based conversion unit consisting of thyristors and a self-excited conversion unit having self-extinguishing semiconductor devices for producing a commutation voltage for the thyristor-based conversion unit, and the thyristors and the self-extinguishing semiconductor devices are connected in series to form arms, the arms being connected in a bridge configuration.
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Accused Products
Abstract
A power converter includes first and second power conversion units that are connected to each other by a d.c. reactor. The first power conversion unit is a converter in which arms consisting of thyristors are connected in a bridge configuration. The second power conversion unit is an inverter in which arms each of a series combination of a thyristor and a self-excited switch unit having a GTO for producing a commutation voltage for the thyristor are connected in a bridge configuration.
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Citations
14 Claims
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1. A power converter comprising first and second power conversion units that are connected to each other by a d.c. reactor,
wherein the first power conversion unit has arms consisting of thyristors connected in a bridge configuration, and the second power conversion unit comprises a thyristor-based conversion unit consisting of thyristors and a self-excited conversion unit having self-extinguishing semiconductor devices for producing a commutation voltage for the thyristor-based conversion unit, and the thyristors and the self-extinguishing semiconductor devices are connected in series to form arms, the arms being connected in a bridge configuration.
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2. A power converter comprising first and second power conversion units that are connected to each other by a d.c. reactor,
wherein at least one of the first and second power conversion units comprises a thyristor-based conversion unit and a self-excited conversion unit having self-extinguishing semiconductor devices for producing a commutation voltage for the thyristor-based conversion unit, the self-excited conversion unit comprises a plurality of self-excited switch units, and wherein each of the self-excited switch units comprises: -
a first series combination of a first self-extinguishing semiconductor device and a first diode, a second series combination of a second diode and a second self-extinguishing semiconductor device, the second series combination being connected in parallel with the first series combination, and a capacitor connected between a connection point between the first diode and the first self-extinguishing semiconductor device and a connection point between the second diode and the second self-extinguishing semiconductor device.
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3. A power converter comprising first and second power conversion units that are connected to each other by a d.c. reactor,
wherein at least one of the first and second power conversion units comprises a thyristor-based conversion unit and a self-excited conversion unit having self-extinguishing semiconductor devices for producing a commutation voltage for the thyristor-based conversion unit, wherein the self-excited conversion unit comprises a plurality of self-excited switch units, and each of the self-excited switch units comprises: -
a first series combination of a first self-extinguishing semiconductor device and a first diode, a second series combination of a second diode and a second self-extinguishing semiconductor device, the second series combination being connected in parallel with the first series combination, a capacitor connected between a connection point between the first diode and the first self-extinguishing semiconductor device and a connection point between the second diode and the second self-extinguishing semiconductor device, a third diode connected in antiparallel connection with the first self-extinguishing semiconductor device, and a fourth diode connected in antiparallel connection with the second self-extinguishing semiconductor device. - View Dependent Claims (4, 5)
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- 6. A power converter comprising first and second power conversion units that are connected to each other by a d.c. reactor, wherein each of the first and second power conversion units comprises a thyristor-based conversion unit consisting of thyristors and a self-excited conversion unit having self-extinguishing semiconductor devices for producing a commutation voltage for the thyristor-based conversion unit, and the thyristors and the self-extinguishing semiconductor devices are connected in series to form arms, the arms being connected in a bridge configuration.
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10. A power converter comprising first and second power conversion units that are connected to each other by a d.c. reactor,
wherein the first power conversion unit is connected with a first transformer, the second power conversion unit is connected with a second transformer, each of the first and second power conversion units comprises a thyristor-based conversion unit consisting of thyristors and a self-excited conversion unit having self-extinguishing semiconductor devices for producing a commutation voltage of the thyristor-based conversion unit, and the thyristors and the self-extinguishing semiconductor devices are connected in series to form arms, the arms being connected in a bridge configuration.
Specification