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Chorus Patent Portfolio
NOTE: All patents are under license from Borealis Technical Limited. The complete Borealis patent portfolio is available online. Many patents are pending, and have not yet issued. As these patents are issued, this page will be updated.
Patent 7,983,804 - System for minimization of aircraft damage on collision Abstract A system for minimizing damage on collision to a vehicle having at least one self-propelled wheel is disclosed. The system comprises a motor in a wheel of said vehicle which drives the vehicle, means for measuring the speed of said wheel, means for measuring the torque of said motor, means for monitoring the ratio of the torque of the motor to the speed of the wheel, and means for stopping said motor when torque:speed ratio exceeds an acceptable value. Patent 7,975,960 - Nosewheel control apparatus Abstract An apparatus for driving a taxiing aircraft is disclosed, comprising, in an aircraft, two self-propelled nosewheels, each having an electric motor; equipment for flight; dual-function controlling means for controlling said equipment for flight and said nosewheels, said dual-function controlling means being disposed in the cockpit of said aircraft; sensing means; and switching means, --wherein said switching means are operable to switch the function of said dual-function controlling means between controlling said equipment for flight and controlling said nosewheels. Said dual function controlling means may control speed and/or steering of the aircraft. Second controlling means may be provided, and may be disposed externally to the aircraft. Patent 7,891,609 - Turnaround methods Abstract A method for reducing the turnaround time of an aircraft having at least one self-propelled undercarriage wheel comprising the step of: moving the aircraft to a required location using at least one self-propelled undercarriage wheel; wherein thrust equipment, (e.g. turbines) are turned on only when needed for takeoff or prior to landing, and are turned off until takeoff or after landing; whereby departing equipment, arriving equipment, and turnaround equipment are not at risk from operating thrust equipment, (e.g. turbines). An apparatus for reducing the turnaround time of an aircraft is disclosed comprising a control unit for facilitating voice communication between a pilot and ground staff. Said control unit may further comprise a control arm for inputting the required direction of movement of said nosewheel; means for transmitting direction information to said self-propelled nosewheel; means for receiving direction information at said self-propelled nosewheel; and means for controlling the direction of said nosewheel. The control unit may also comprise means for turning on and off an APU, parking brakes, and other aircraft features. Patent 7,852,037 - Induction and switched reluctance motor Abstract This application describes a motor designed to operate as a reluctance machine at low speeds and as an induction machine at high speeds. The drive waveform is composed of one or more harmonics to be used to match the reluctance pattern of the stator-rotor, causing the rotor to rotate due to the reluctance effect, and one or more other harmonics to induce current in the rotor, causing the rotor to rotate due to the induction effect and the subsequent interaction of the stator and rotor magnetic fields. The two effects are generally not applied simultaneously. Patent GB 2 444 678 - Nosewheel control apparatus Abstract Field of Invention: The present invention relates to self-propelled nosewheel motors in particular to the control thereof. Disclosure of Invention: It can be seen from the forgoing that it would be advantageous to be able to drive an aircraft on the ground using cockpit controls. It would be further advantageous to be able to drive an aircraft on the ground using controls on the ground within an airport, and to be able to transfer control between controllers. The present invention is a nosewheel control apparatus between an operator and an aircraft, whereby a motorized aircraft wheel or wheels may be controlled during taxi. Patent GB 2 457 144 - Wheel Motor Cooling Abstract Field of Invention: The present invention is concerned with the cooling of aircraft undercarriage components. Disclosure of Invention: An apparatus of cooling undercarriage components of a self-propelled aircraft undercarriage wheel comprising: at least one drive means for propelling said undercarriage wheel, said drive means comprising an electric motor having a rotor and a stator; whereby said drive means acts as a cooling means to cool said undercarriage components, which may be brakes, wheels, tire beads, drive means or any other undercarriage components. Said undercarriage wheel may be a nosewheel, main gear or any or several or all wheels in an aircraft. Patent 7,469,858 - Geared wheel motor design Abstract The present invention is a compound planetary gear system which has a moveable sun gear and a lockable sun gear to change the gear ratio between a high gear ratio and a pseudo 1:1 slipping ratio. The system makes use of a ratchet and pawl mechanism to provide a safety backup for when the lockable sun gear is locked. The invention may be used to move the aircraft from a stationary position, for taxiing, and for pre-rotating the wheels prior to landing. Patent 7,464,549 - Polyphase hydraulic drive system Abstract The present invention comprises an input drive system, which provides a plurality of phases of oscillating fluid flow, and an output drive system connected directly to the input drive system that is powered by the plurality of phases of oscillating fluid flow. The input drive system comprises a plurality of pistons that are caused to move in a reciprocating fashion by a power source. The power source may be a rotating power source, such as that provided by an electric motor, a diesel or petrol engine, or a turbine system. The input drive system comprises a cam ring attached to a rotating power source; a plurality of cam rollers in contact with the cam ring; and a plurality of pistons attached to the cam rings. The output drive system comprises one or more pistons that are caused to move in a reciprocating fashion by the oscillating fluid flow provided by the input drive system. The output drive system comprises a cam ring attached to a load; a plurality of cam rollers in contact with the cam ring; and a plurality of pistons attached to the cam rings Patent 7,375,483 - Mesh connected brake array for electrical rotating machines Abstract In the present invention, several polyphase devices are connected together: an inverter, and electrical rotating machine, and a resistive load or braking resistor. The purpose of the resistive load is to dissipate excess electrical power which may be produced when the inverter acts to slow down the rotating machine, causing the rotating machine to act as a generator. In common art, this resistive load is a single DC resistor coupled to the DC link of the inverter via a separate resistor control transistor. In the present invention, the resistive load is a mesh connected array of resistors, and is electrically connected to the same inverter output terminals that the rotating machine is connected to. When it is desired that the resistors absorb energy, for example from a braking operation, then the harmonic content of the inverter output is adjusted, thus placing voltage differences across the resistor array and causing current to flow in the resistors. Patent 7,327,105 - Mesh connected electrical rotating machine with span changing Abstract An electrical rotating apparatus is provided that has variable impedance. This is achieved by connecting one of the polyphase components of the apparatus in a mesh connection. The spanning value, L, of such a mesh connection may be varied by changing the harmonic content supplied by an inverter component. Also provided is a method for connecting an inverter to a motor, wherein a switching arrangement permits the simple alteration between various mesh connections of different span value, changing thereby the Volts/Hertz ratio of the motor. Patent 7,126,298 - Mesh connected brake array for electrical rotating machines Abstract In the present invention, several polyphase devices are connected together: an inverter (420), and electrical rotating machine (440), and a resistive load or braking resistor (430). The purpose of the resistive load is to dissipate excess electrical which may be produced when the inverter acts to slow down the rotating machine (440), causing the rotating machine to act as a generator. In common art, this resistive load is a single DC resistor coupled to the DC link of the inverter via a separate resistor control transistor. In the present invention, the resistive load is a mesh connected array of resistors, and is electrically connected to the same inverter output terminals that the rotating machine is connected to. When it is desired that the resistors absorb energy, for example from a braking operation, then the harmonic content of the inverter output is adjusted, thus placing voltage differences across the resistor array (430) and causing current to flow in the resistors. Patent 7,105,938 - Electronically controlled engine generator set Abstract An electronically controlled electrical power generator comprises a generator driven by a heat engine, operated by control means, and carrying an electrical load. Operation of the heat engine is at wide open throttle. Control over engine operation and electrical output of the generator is achieved by electronically manipulating the electric load, and/or adjusting excitation levels at the generator's magnetic fields, so as to change engine/generator equilibrium speed. In a beneficial embodiment, the generator is powered by an energy storage unit, to temporarily act as a motor and rotate the engine when starting, and during power absorbing strokes. Patent 7,075,265 - High phase order electrical rotating machine with distributed windings Abstract A rotating induction machine, containing five or more different phases, having windings distributed according to a sinc function with a cutoff frequency allowing low-order spatial harmonics but preventing higher order spatial harmonics from flowing. In a preferred embodiment, the machine is connected to drive means capable of injecting third harmonic into the machine. In a further preferred embodiment, the windings are connected to the drive means with a mesh connection and the machine has five phases. Patent 6,922,037 - Rotating induction apparatus Abstract An electrical rotating apparatus comprises an inverter system that outputs more than three phases. The apparatus further includes a stator electrically coupled to the inverter system, and a rotor electromagnetically coupled to a magnetic field generated by the stator. A signal generator generates a pulse modulated drive waveform signal, that has a frequency synchronized with the rotational frequency of the rotor, and the pulse modulated drive waveform signal drives the inverter system. The pulse modulated drive waveform signal has a pulsing frequency. Additionally, the inverter system may be fed by a pulse modulated drive waveform signal that is fed through at least one signal delay device. Alternatively, the system may also be fed selected harmonic components, such as the third harmonic, up until the number of phases in the apparatus. Patent 6,864,661 - Rotating induction apparatus Abstract An electrical rotating apparatus comprises an inverter system that outputs more than three phases. The apparatus further includes a stator comprising a plurality of slots and full span concentrated windings, with the windings being electrically coupled to the inverter system, and a rotor electromagnetically coupled to a magnetic field generated by the stator. A signal generator generates a drive waveform signal, that has a fundamental frequency, and the drive waveform signal drives the inverter system. The drive waveform signal has a pulsing frequency and is in fixed phase relation to the fundamental frequency. Additionally, the inverter system may be fed by a drive waveform signal that is fed through at least one signal delay device. Patent 6,838,791 - Mesh connected electrical rotating machine with span changing Abstract An electrical rotating apparatus is provided that has variable impedance. This is achieved by connecting one of the polyphase components of the apparatus in a mesh connection. The spanning value, L, of such a mesh connection may be varied by changing the harmonic content supplied by an inverter component. Also provided is a method for connecting an inverter to a motor, wherein a switching arrangement permits the simple alteration between various mesh connections of different span value, changing thereby the Volts/Hertz ratio of the motor. Patent 6,837,141 - Polyphase hydraulic drive system Abstract The present invention comprises an input drive system, which provides a plurality of phases of oscillating fluid flow, and an output drive system connected directly to the input drive system that is powered by the plurality of phases of oscillating fluid flow. The input drive system comprises a plurality of pistons that are caused to move in a reciprocating fashion by a power source. The power source may be a rotating power source, such as that provided by an electric motor, a diesel or petrol engine, or a turbine system. The input drive system comprises a cam ring attached to a rotating power source, a plurality of cam rollers in contact with the cam ring; and a plurality of pistons attached to the cam rings. The output drive system comprises one or more pistons that are attached to move in a reciprocating fashion by the oscillating fluid flow provided by the input drive system. The output drive system comprises a cam ring attached to a load, a plurality of cam rollers in contact with the cam ring, and a plurality of pistons attached to the cam rings. Patent 6,831,430 - High Phase Order Motor with Mesh Connected Windings Abstract A high phase order induction machine drive system is disclosed. This has an inverter system for the synthesis of a plurality of phases of alternating current output, and a N-phase induction motor (N is greater than 3). The inverter system has N terminals, numbered from 1 to N. Each motor phase is electrically connected to a pair of inverter terminals. One connection is made to a first inverter terminal and the other connection is made to a second inverter terminal. The number of inverter terminals (in order of electrical phase angle) between the first terminal and the second terminal is S+1, where S is the skip number). The phase angle difference between the pair of inverter terminals to which each motor phase is connected is identical for each motor phase. Patent 6825575 - Electronically controlled engine generator set Abstract An electronically controlled electrical power generator comprises a generator driven by a heat engine, operated by control means, and carrying an electrical load. Operation of the heat engine is at wide open throttle. Control over engine operation and electrical output of the generator is achieved by electronically manipulating the electric load, and/or adjusting excitation levels at the generator's magnetic fields, so as to change engine/generator equilibrium speed. In a beneficial embodiment, the generator is powered by an energy storage unit, to temporarily act as a motor and rotate the engine when starting, and during power absorbing strokes. Patent 6657334 - High Phase Order Motor with Mesh Connected Windings Abstract A high phase order induction machine drive system is disclosed. This has an inverter system for the synthesis of a plurality of phases of alternating current output, and a N-phase induction motor (N is greater than 3). The motor is connected to the inverter terminals so that each motor phase is electrically connected to a first inverter terminal and a second inverter terminal S+1 inverter terminals distant from the first inverter terminal in order of electrical phase angle (S is the skip number). The phase angle difference between the pair of inverter terminals to which each motor phase is connected is identical for each motor phase. Patent 6651760 - Thermionic automobile Abstract A combustion chamber-thermionic device-electric motor is provided in an automobile. The combustion chamber of the present invention provides a heat output which is transformed to electricity by the thermionic device and a motor converts the electrical energy to motive power for the wheels. Patent 6,614,202 - PWM motor drive apparatus with increase of low speed capability Abstract: Maximizing current from a given power inverter in an electrical rotating machine and maintaining the speed of an electrical rotating machine which has more turns of the winding. Patent 6,570,361 - Rotating induction apparatus Abstract: An electrical rotating apparatus comprises an inverter system that outputs more than three phases. The apparatus further includes a stator comprising a plurality of slots and full span concentrated windings, with the windings being electrically coupled to the inverter system, and a rotor electromagnetically coupled to a magnetic field generated by the stator. A signal generator generates a drive waveform signal, that has a fundamental frequency, and the drive waveform signal drives the inverter system. The drive waveform signal has a pulsing frequency and is in fixed phase relation to the fundamental frequency. Additionally, the inverter system may be fed by a drive waveform signal that is fed through at least one signal delay device. Patent 6351095 - Polyphase induction electrical rotating machine Abstract: An electrical rotating machine comprises an inverter drive system wherein alternating current comprising more than three phases is produced from the inverter drive system. The machine further includes a stator comprising a plurality of slots and windings, wherein the windings are electrically coupled to the inverter drive system and a winding chording factor of the stator is approximately 1. Further, a winding distribution factor of the stator could also be approximately 1. A rotor in the machine is electromagnetically coupled to a rotating magnetic field generated by the windings and the rotating magnetic field has a flux density level that exhibits saturation effects. Patent 6348775 - Drive wave form synchronization for induction motors Abstract A polyphase induction motor is operated by an inverter drive system comprising a logic level controller. A number, preferably twelve or more, of independently driven phases causes harmonic fields, up to a number equal to the number of phases, to oscillate in synchrony with the fundamental oscillating field. A pulse-width modulation (“PWM”) carrier is used by the logic level controller to synthesize a desired drive alternating current, in which the pulsing distortion produced by the pulse width modulation produces a synchronous oscillating field in the driven polyphase induction motor. Patent 6252324 - Method of winding a rotating induction apparatus Abstract A method of winding an electrical rotating apparatus includes determining a desired number of phases that is output from an electrical rotating apparatus, with the number of phases being greater than three. A stator is provided and additionally, a rotor is provided such that the rotor is electromagnetically coupled to a magnetic field generated by the stator. A plurality of coils is also provided, with the plurality of coils including a first coil and a second coil. The plurality of coils are wound around the stator, with the first coil being placed on the right side of the stator and the second coil being placed on the left side of the stator. Patent 6198238 - High phase order cycloconverting generator and drive means Abstract An electrical generator, consisting of a high phase order generator and a high phase order cycloconverter. Output from said cycloconverter may be high phase order, three phase, single phase, or direct current. Output from said cycloconverter may be of arbitrary frequency, voltage, and phase. Power electronic components are smaller and more efficiently used. Slower and therefor less expensive devices may be beneficially used. Variable speed resources may be used without the use of a DC to DC converter, enhancing power production efficiency. In a beneficial embodiment of the present invention, said cycloconverter is used to provide power directly to a high phase order motor, whereby diesel electric drive means may be constructed to higher specific power and higher efficiency. Patent 6054837 - POLYPHASE INDUCTION ELECTRICAL ROTATING MACHINE Abstract A polyphase induction machine operated by an inverter drive system. The machine is constructed with concentrated full span windings. Twelve or more phases are used to sufficiently cover the airgap region, in contrast to the conventional three phases using distributed and chorded windings. Substantial efficiency and starting torque benefits are thereby obtained. |
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