Patent application number | Description | Published |
20100133813 | Systems and Methods for Providing AC Power from Multiple Turbine Engine Spools - Systems and methods for providing AC power from multiple turbine engine spools are disclosed. A system in a particular embodiment includes a turbofan engine having a compressor, a first turbine and a first shaft connected between the compressor and the first turbine, and a fan, a second turbine and a second shaft connected between the fan and the second turbine. The system can further include a state power bus and a first energy converter coupled between the first shaft and the power bus, with the first energy converter including a starter/generator, and being positioned to convert a first variable frequency energy transmitted by the first shaft to a first generally constant frequency energy. A second energy converter can be coupled between the second shaft and the power bus, with the second energy converter including a generator and being positioned to convert a second variable frequency energy transmitted by the second shaft to a second generally constant frequency energy, with the second generally constant frequency energy in phase with and at generally the same frequency as the first generally constant frequency energy. A controller can be operatively coupled to the starter/generator and the generator, e.g., to control the functions of these devices. | 06-03-2010 |
20120091716 | SYSTEMS AND METHODS FOR PROVIDING AC POWER FROM MULTIPLE TURBINE ENGINE SPOOLS - Systems and methods for providing AC power from multiple turbine engine spools are disclosed. An aircraft system in a particular embodiment includes an engine having a first shaft connected and a second shaft. The aircraft system can further include a bus system and a first energy converter including a starter/generator, coupled between the first shaft and the bus system to convert a first variable frequency energy transmitted by the first shaft to a first generally constant frequency energy. A second energy converter can be coupled between the second shaft and the bus system, with the second energy converter including a generator to convert a second variable frequency energy transmitted by the second shaft to a second generally constant frequency energy. | 04-19-2012 |
20130286513 | Subtransient Current Suppression - A system and method for subtransient current suppression in a power system. A generator is configured to provide an output current to a power distribution system. A current sensor is configured to sense the output current. A switch is configured to direct the output current to ground when the switch is closed. A controller is configured to close the switch for a time delay in response to identifying a level of the output current that is greater than a threshold level and to automatically open the switch in response to identifying an end of the time delay. | 10-31-2013 |
20140032002 | ELECTRIC SYSTEM STABILIZING SYSTEM FOR AIRCRAFT - An electric system of an aircraft includes a power stabilizing device connected to a primary AC bus and a secondary battery. The secondary battery has a rated voltage which allows the secondary battery to absorb regenerative power from a control surface actuator. Based on a voltage and a frequency in the primary AC bus, charging/discharging of the secondary battery is controlled to stabilize the electric system. | 01-30-2014 |
20140197681 | ELECTRIC SYSTEM STABILIZING SYSTEM FOR AIRCRAFT - A power stabilizing device in a system includes as a portion of a power converter section, a second PWM converter provided between a second primary AC bus and a second DC bus in an electric system and configured to perform mutual conversion between DC power and AC power. A power stabilizing control section in the power stabilizing device controls charging and discharging of a secondary battery based on a voltage and a frequency in the second primary AC bus, thereby stabilizing the electric system. | 07-17-2014 |
20150183385 | Electric System Stabilizing System for Aircraft - A power stabilizing device in a system includes as a portion of a power converter section, a second PWM converter provided between a second primary AC bus and a second DC bus in an electric system and configured to perform mutual conversion between DC power and AC power. A power stabilizing control section in the power stabilizing device controls charging and discharging of a secondary battery based on a voltage and a frequency in the second primary AC bus, thereby stabilizing the electric system. | 07-02-2015 |