"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7486035 | Power output apparatus and vehicle including such power output apparatus A first motor generator is linked to an engine and generates torque to start the engine. At time t1-t2 and time t3-t4, when current conducted to the first motor generator will exceed the upper limit value and the lower limit value due to ... | 02/03/2009 |
| 7443117 | Control apparatus for electric vehicles In a hybrid vehicle control apparatus, a motor control unit executes a system voltage stabilization control, in which an input power to a MG unit is controlled to suppress variations in the system voltage. The motor control unit executes the input power control on t... | 10/28/2008 |
| 7330014 | Method and system for controlling power to be fed to electrical loads In a control system, a control unit is connected to a generator and is configured to, when a steep change in a load current flowing through at least one specific electrical load is sensed, control the output of the generator based on the sensed steep change in the l... | 02/12/2008 |
| 7157885 | Inverter controlled generator set and method for controlling the same A method for controlling an inverter controlled generator set which comprises a DC power source section having as a power source a generator driven by an engine and an inverter which converts an output of said DC power source section into an AC output, the method co... | 01/02/2007 |
| 7004456 | Engine speed limiter for a hoist A mobile service rig for wells includes a hoist powered by an internal combustion engine. In response to the hoist exerting a predetermined lifting force, the lifting force is limited by automatically limiting or reducing the speed of the engine. ... | 02/28/2006 |
| 6958587 | Torque distribution for multiple propulsion system vehicles A vehicle has multiple electrical propulsion systems. Torque is split among the various propulsion systems to meet a variety of requirements and limitations including operator demand, vehicular traction limits, electric machine torque capabilities, machine efficienc... | 10/25/2005 |
| 6191544 | Device for compensation of voltage drop at light sources of a vehicle with electrical auxiliary charging device A device for compensation of voltage drop at light sources of a vehicle has light sources having a resistance R0 and connected to a vehicle battery. An auxiliary charging device with electric motor is provided. The electric motor has an on/off ... | 02/20/2001 |
| 5606233 | System for generating electricity in a vehicle A system for generating electricity in a vehicle when the vehicle is not moving at a sufficient speed to drive the on board generators and when the wind is insufficient to drive the generators. In one embodiment, a control unit receives input signals from... | 02/25/1997 |
| 4734626 | Double differential, electrically compensated constant speed drive An electrically compensated constant speed drive (ECCSD) according to the present invention includes a pair of power transmission paths between the prime mover and a load wherein each power transmission path includes a mechanical differential having a fir... | 03/29/1988 |
| 4567407 | Biased unitized motor alternator with stationary armature and field A unitized (single unit) motor and flux switch alternator having stationary field, armature and motor windings which provides a magnetic path for some of the motor input power to feed through and increase the alternating current (AC) generator output. A r... | 01/28/1986 |
| 4543513 | Method and an apparatus for controlling a.c. rotating machinery power plants The control of a quantity (voltage, phase) relating to a generator-motor pair in an electric power station is accomplished by generating a pulse sequence associated with the quantity to be controlled, generating a predetermined reference pulse sequence an... | 09/24/1985 |
| 4354144 | Transmissionless drive system A continuously variable transmissionless drive system providing maximum torque at low speeds. The system is usable in a hybrid vehicle having a prime mover, such as an internal combustion engine, operated at its optimum rpm for efficiency. The prime mover... | 10/12/1982 |
| 4095664 | Electric motor driven automotive vehicle having a magnetic particle clutch A power plant and drive system for an automotive vehicle includes a constant speed 120 volt 3 phase AC motor which is coupled to the drive shaft of the vehicle through a magnetic particle clutch. The 120 volt 3 phase AC motor receives energy from a 120 vo... | 06/20/1978 |
| 4034273 | Turbo-electric turret drive system for mobile vehicles A turret drive system for mobile and armored vehicles includes a turbo-geator for supplying power to an electric motor. The driveshaft of the motor is connected to the driveshaft of a rotary amplifier, with a flywheel mounted to the interconnecting drive... | 07/05/1977 |
| 4012677 | Speed control for electrically propelled traction vehicles An electrical propulsion control system for self-propelled traction vehicles of the type having a prime mover-driven electric generator supplying energy to traction motors and regulating means for maintaining the electrical output of the generator within ... | 03/15/1977 |