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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 |
| 7164251 | Oscillation adjuster and oscillation adjusting method A vibration controller controls vibrations generated in a driven object included in a system subject to vibrations due to the dynamic unbalance or eccentricity of a rotating member driven for rotation by an electric motor. An angular position transforming unit (4... | 01/16/2007 |
| 7126307 | Interface circuit for actuating an electrical device and circuit arrangement for actuating an electric motor therewith An interface circuit for actuating an electrical consumer, especially a pole-changing rotary-current induction motor, with a first contact element assigned to a signal line carrying an alternating voltage signal to generate at least two different control signals. A ... | 10/24/2006 |
| 6979979 | Gas turbine engine starter-generator exciter starting system and method including a capacitance circuit element A rotating electrical machine, such as an aircraft starter-generator, that includes an exciter that has its stator windings supplied with electrical power from a power supply. One or more switches are electrically coupled between the exciter stator winding and the p... | 12/27/2005 |
| 6977478 | Method, system and program product for controlling a single phase motor A controller is provided for transitioning a drive signal to a single phase motor between a square wave and pulse width modulation modes, wherein the drive signal is in square wave mode at low motor frequencies and in pulse width modulation mode during normal operat... | 12/20/2005 |
| 6927502 | Three-phase asynchronous motor driven azimuthal drive for wind power installations Wind power installations generally have an active drive for wind direction tracking. The active drive rotates the machine housing of the wind power installation in such a way that the rotor blades of the rotor are oriented in the direction of the wind. That drive wh... | 08/09/2005 |
| 6909263 | Gas turbine engine starter-generator exciter starting system and method including a capacitance circuit element A rotating electrical machine, such as an aircraft starter-generator, that includes an exciter that has its stator windings supplied with electrical power from a power supply. One or more switches are electrically coupled between the exciter stator winding and the p... | 06/21/2005 |
| 6906493 | Electronic brake for motor In an electronic system, motor braking is accomplished by applying direct current (DC) voltage, developed across a capacitive element during a run mode operation, across terminals of an alternating current (AC) or an induction motor. While the motor is ON, i.e. duri... | 06/14/2005 |
| 5818185 | Process and device for monitoring and controlling the speed of rotation of an electric drive with frequency converter for hoisting gears A process and a device for monitoring and/or controlling the speed of rotation of an electric drive having an asynchronous motor equipped with a braking device (11) and connected via a frequency adapter (13) to an alternating current system (12), e.g. thr... | 10/06/1998 |
| 4335342 | Reciprocating drive system for a body such as a carriage supporting electrostatic means for spraying a pulverized material, the system including an asynchronous squirrel cage motor A reciprocating drive system moves a body of defined inertia, such as a carriage supporting electrostatic spraying means, at full speed between two points at which the direction of movement is reversed. The drive system includes an electric motor with pol... | 06/15/1982 |
| 4101013 | Process for the control and regulation of the speed of a mobile The speed of an elevator is controlled and adjusted by utilizing a differential voltage obtained from a variable voltage indicating actual speed and a control voltage reflecting an ideal curve of speed variation. The resulting voltage or reference curve h... | 07/18/1978 |
| 3973175 | Induction motor speed control apparatus An apparatus for controlling the speed of an induction motor is disclosed which comprises an induction motor, a load coupled to the induction motor which has a negative polarity, a difference signal generating device for generating a difference signal bet... | 08/03/1976 |
| 3971971 | Electric hoist control and braking system The invention relates to control and braking systems for apparatus driven by single and polyphase alternating current induction motors. The system prevents destructive and dangerous overspeeding where the nature of the driven load is such that it can furn... | 07/27/1976 |
