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An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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| Number | Title | Issue Date |
| 7944087 | Method and apparatus for stabilizing voltage of intermediate circuit of frequency converter A method and an apparatus for damping voltage oscillation of a voltage intermediate circuit of a frequency converter, the frequency converter comprising a half controlled rectifier bridge coupled to a supply network. The method comprises determining magnitude (U | 05/17/2011 |
| 7432624 | Rotor for a permanent-magnet electrical machine and a machine for manufacturing it The object of the invention is a rotor (4) for a permanent-magnet electrical machine, comprising an axle (6) mounted to the machine body with bearings, a rotor pack made of iron and arranged around the axle (6), as well as permanent magnets (... | 10/07/2008 |
| 7365622 | Switching device combination for capacitive loads connected to direct voltage This publication discloses a switching device combination for capacitive loads (3) connected to a direct voltage. The switching device combination includes an actual switch component (1) for connecting voltage to the capacitive load (3), a charg... | 04/29/2008 |
| 7349814 | Measurement method and arrangement The invention relates to a method and an arrangement for measuring a liquid flow in connection with a pump system. The invention is preferably implemented in a pump system where the pump (240) is driven by an alternating-current motor (230), whose rota... | 03/25/2008 |
| 7271505 | Voltage balancing in intermediate circuit capacitors A balancing circuit for voltages of a series connection of capacitors, particularly for intermediate circuit capacitors (3) of an inverter, there being at least two intermediate circuit capacitors connected in series over intermediate circuit voltage. The bal... | 09/18/2007 |
| 7245197 | Liquid-cooled choke The invention relates to a liquid-cooled choke comprising a choke core (1), a choke coil (2) and a path (3) for a cooling liquid to cool the choke. The choke core (1) is divided into at least two parts (1a, 1b)... | 07/17/2007 |
| 7221152 | Method in salient-pole permanent magnet synchronous machine A method for determining the speed and position of a rotor of a salient-pole permanent magnet synchronous machine, the method comprising the steps of creating a voltage model (41) on a permanent magnet synchronous machine, forming a voltage reference (us... | 05/22/2007 |
| 7218070 | System and method for braking a motor of a propulsion unit The present invention relates to a propeller drive arrangement for vessels used in water-borne traffic, and specifically to a propeller drive arrangement containing a propulsion unit, and to such an arrangement, which contains a propulsion unit, which is turnable re... | 05/15/2007 |
| 7198528 | Motor unit for a ship An arrangement of a ship's propulsion unit includes a motor unit with a motor housing arranged in the water. A motor and related controls are provided in the motor housing. A propeller is arranged at an end of a motor shaft. The motor unit includes an electrical mot... | 04/03/2007 |
| 7163426 | Motor unit for a ship An arrangement for a ship's propulsion unit includes a motor unit with a motor housing arranged in the water. A motor and related controls are provided in the motor housing. A propeller is arranged at an end of a motor shaft. The motor unit includes an electric moto... | 01/16/2007 |
| 7082374 | Energy consumption in electrical drive The invention relates to a measurement and evaluation method of energy consumption in an electrical drive having a control unit and an AC motor and an arrangement for realizing the method. The method has the following steps. Data of the state of the AC motor, such a... | 07/25/2006 |
| 7034510 | Method for coupling inverter to alternating voltage A method for coupling an inverter to an alternating voltage source, the inverter comprising a current controller, which controls phase currents and implements reference current. The method comprises steps of giving zero current as the reference current for the curre... | 04/25/2006 |
| 6712654 | Turning of a propulsion unit The present application is a method and apparatus for moving and steering a vessel traveling in water. The arrangement for moving and steering a vessel includes a propulsion unit having a chamber positioned outside the vessel equipment for rotating a propeller arran... | 03/30/2004 |
