| Patent application number | Description | Published |
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| 20100059878 | Stack Assemblies Containing Semiconductor Devices - The present invention provides a stack assembly comprising at least one semiconductor device | 03-11-2010 |
| 20100072834 | Assemblies for Electrical Machines - The present invention provides an assembly for mounting to, or forming part of, the stator assembly of a rotating electrical machine. A plurality of component modules are provided at angularly spaced-apart locations around the assembly and contain power electronics components. Electrically conductive toroidal inlet and outlet manifolds are provided to convey coolant fluid (preferably a liquid dielectric such as MIDEL) to and from the component modules. The inlet and outlet manifolds provide a dual function as a coolant circuit for conveying coolant fluid and as busbars. | 03-25-2010 |
| 20110074325 | Electronic Commutator Circuits - The present invention provides an electronic commutator circuit for use with a stator winding of an electrical machine. The stator winding of the electrical machine includes a number of coils linked by the same number of points of common coupling. The electronic commutator circuit comprising the same number of switching stages, each switching stage being connected between a respective one of the points of common coupling and first and second dc terminals. Each switching stage further includes a first reverse blocking semiconductor power device (such as a Reverse Blocking Gate Turn Off Thyristor (RB-GTO | 03-31-2011 |
| 20110084670 | Power Distribution Systems - The present invention relates to power distribution systems (e.g. a marine power distribution and propulsion system) that include first and second ac distribution busbars. The first ac distribution busbar will typically be a medium voltage busbar for the propulsion drive systems and the second ac distribution busbar will typically be a low voltage for ships services. A 12-pulse rectifier has its ac terminals electrically connected to the first ac distribution busbar. A multiple output generator has first and second galvanically-isolated stator windings. The first stator winding provides a six-phase ac output and is connected to the first ac distribution busbar. The second stator winding provides a three-phase ac output and is connected to the second ac distribution busbar. The six-phase ac output is phase shifted relative to the three-phase ac output to reduce the problematic coupling of harmonic distortion between the first and second ac distribution busbars. | 04-14-2011 |
| 20110140561 | MAGNET RETAINING ARRANGEMENT - A permanent magnet rotor arrangement that is particularly suitable for low-speed large-diameter electrical generators includes a rotor | 06-16-2011 |
| Patent application number | Description | Published |
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| 20090096518 | Matrix Converters - A matrix converter that can be used as part of a two-stage power converter has three ac three ac voltage lines AC | 04-16-2009 |
| 20090115363 | Electronic Commutator Circuits - The electronic commutator circuits provide forced commutation enhancements that can be embedded within a known electronic commutator to overcome its low speed torque limitation. The forced commutation enhancements to the basic switched stage use a pair of thyristors. Capacitors may be pre-charged and synchronized to supplement coil voltages when discharged, thereby reducing commutation overlap duration and maximizing the turn-off time available to allow the thyristors to attain forward blocking capability. A capacitive discharge can be achieved by initiating the capacitive discharge by the same thyristor that will carry the current following the commutation, or by initiating the capacitive discharge by an auxiliary thyristor. | 05-07-2009 |
| 20090315664 | Fuses - The present invention relates to a fuse assembly for rapid interruption of a prospective fault current. The fuse assembly includes a plurality of splitter plates. A plurality of foil elements extend between a pair of terminals and are physically supported by the splitter plates. A pair of parallel busbars are in series with the foil elements and generate a magnetic field that is substantially perpendicular to the current flowing in the foil elements. In the presence of a prospective fault current, the foil elements will melt and at arcing inception an electromagnetic force developed as a result of interaction between the magnetic field and the arc current will push the molten foil elements into the splitter plates. This increases the arc length and hence the arc voltage. At least the foil elements and the splitter plates are preferably located in flowing liquid dielectric such as MIDEL 7131, for example. The liquid dielectric flow may help to push the molten foil elements into the splitter plates and removes debris away from the arc site. | 12-24-2009 |
| 20100134074 | EXCITER ASSEMBLIES - An exciter assembly for supplying a field current to the rotor windings of a superconducting synchronous machine includes a pulse transformer having a stationary primary winding and a secondary winding that is mounted to the rotor of the superconducting synchronous machine for rotation therewith. A switched mode power supply supplies a pulsed voltage to the primary winding of the pulse transformer. The pulsed voltage developed at the secondary winding of the pulse transformer is supplied to the rotor windings through a rectifier semiconductor device and a pair of transfer leads. The rotor windings and a flywheel semiconductor device are located inside a cryogenic chamber or cryostat. The flywheel semiconductor device is connected in parallel with the rotor windings and operates in unison with the rectifier semiconductor device in order to provide synchronous rectification of the switched mode power supply output. The switched mode power supply and both the primary and secondary windings of the pulse transformer are located outside the cryostat. | 06-03-2010 |
