General Electric Technology GmbH Patent applications |
Patent application number | Title | Published |
20160141969 | ELECTRICAL ASSEMBLY - An electrical assembly includes a DC tap including first and second tap terminals that are respectively connectable to first and second DC power transmission media, the DC tap including a tap limb extending between the first and second tap terminals and having two limb portions separated by a third tap terminal connectable to an electrical load, each tap limb portion including a DC blocking capacitor. The assembly further includes a current return configured to electrically interconnect the or each AC terminal to the third tap terminal, a converter unit, and a controller configured to selectively control the converter unit to generate at least one first non-fundamental frequency alternating current component at the or each AC terminal and modify the or each first non-fundamental frequency alternating current component to enable the DC tap to draw power from the DC electrical network for supply to the electrical load. | 05-19-2016 |
20160141962 | CONVERTER - A voltage source converter includes a converter limb directly connected between first and second DC terminals. The converter limb includes an AC terminal, a first limb portion directly connected between the first DC terminal and the AC terminal, and a second limb portion directly connected between the second DC terminal and the AC terminal. Only one of the first and second limb portions includes a multilevel converter block, the other of the first and second limb portions includes a switching block, the switching block is switchable to selectively permit current flow in at least one direction in the corresponding limb portion and inhibit current flow in at least one direction in the corresponding limb portion, and at least one of the first and second limb portions is controllable to control the configuration of an AC voltage waveform at the AC terminal. | 05-19-2016 |
20160141876 | ALTERNATE ARM CONVERTER - An alternate arm converter includes at least one converter limb that defines first and second limb portions. Each limb portion includes at least one director switch connected in series with a chain-link converter between one of two DC terminals and an AC terminal of the converter. The chain-link converters are operable to generate a voltage waveform at the AC terminal, and the director switches are operable to switch the respective chain-link converters in and out of circuit between the respective DC terminal and the AC terminal. The converter also includes a controller configured to selectively control the switching of each director switch to form a current circulation path including each limb portion and the DC network. The controller, during formation of the current circulation path, forces an alternating current to flow through the current circulation path to transfer energy between the chain-link converters of the limb portions. | 05-19-2016 |
20160118907 | SEMICONDUCTOR SWITCHING STRING - A semiconductor switching string includes a plurality of series-connected semiconductor switching assemblies, each having a main semiconductor switching element that includes first and second connection terminals. The main semiconductor switching element also has an auxiliary semiconductor switching element electrically connected between the first and second connection terminals. Each semiconductor switching assembly also includes a control unit configured to switch on a respective auxiliary semiconductor switching element to selectively create an alternative current path between the first and second connection terminals whereby current is diverted to flow through the alternative current path to reduce the voltage across the corresponding main semiconductor switching element. The or each control unit is further configured to switch on the auxiliary semiconductor switching element when the voltage across the corresponding main semiconductor switching element differs from a voltage reference derived from the voltage across all of the main semiconductor switching elements. | 04-28-2016 |
20160084093 | Turbine Airfoil of Composite Material and Method of Manufacturing Thereof - A turbine blade having a root and a tip and an airfoil with a core section made of composite material and a protective sheath or layer joined to the composite core at a location or locations exposed to erosion is described with the composite core of the airfoil being continuous from a location in vicinity of the root to a location in vicinity of the tip of the blade and including a section which widens with distance from the rotational axis along the length of the airfoil and which ends at the location in vicinity of the tip of the blade. The protective sheath or layer is secured by interference fit with widening section of the core. | 03-24-2016 |