| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 318140000 | GENERATOR-FED MOTOR SYSTEMS HAVING GENERATOR CONTROL | 20 |
| 20130057183 | HYDRAULIC ELECTRICITY GENERATOR AND SEPARATION TYPE ELECTRIC FLUID PUMP DRIVEN BY THE SAME - The present invention relates to a hydraulic electricity generator and separation type electric fluid pump driven by the same, wherein an external fluid in a specific space is adopted as a driving power source for driving a blade set to convert the fluid kinetic energy into rotary kinetic energy to drive a generator, and the electric power produced by the generator is transmitted through a conductive wire for transmitting electric power with a linear transmission means, thereby driving an electric fluid pump device including an electric fluid pump or electric fan and installed in the specific space, the application thereof is for example converting the external fluid kinetic energy into indoor airflows. | 03-07-2013 |
| 318141000 | Automatic generator control and/or with time-delay means | 5 |
| 318142000 | Responsive to diverse conditions or with time-delay means | 4 |
| 20080303459 | Generator Control Unit - An object of the present invention is to provide a generator control unit having improved voltage response in a system which is not provided with a battery in a DC output unit. | 12-11-2008 |
| 20120091931 | INDUCTION MOTOR TORQUE CONTROL IN A PUMPING SYSTEM - A system and method are provided for controlling the speed of a motor driving a load that is electrically connected to a generator driven by an engine, through use of a first control feedback loop configured to control the rotor flux of the motor by controlling the field excitation of the generator, and a second control feedback loop configured to control the speed of the motor by controlling the throttle position of the engine. | 04-19-2012 |
| 318143000 | Plural electrical conditions | 2 |
| 20100066277 | Load demand and power generation balancing in direct series electric drive system - An electric drive system includes a prime mover connected to a generator ( | 03-18-2010 |
| 20100231146 | INDUCTION MOTOR TORQUE CONTROL IN A PUMPING SYSTEM - A system and method are provided for controlling the speed of a motor driving a load that is electrically connected to a generator driven by an engine, through use of a first control feedback loop configured to control the rotor flux of the motor by controlling the field excitation of the generator, and a second control feedback loop configured to control the speed of the motor by controlling the throttle position of the engine. | 09-16-2010 |
| 318146000 | Speed of motor or driven device | 1 |
| 20080297075 | Power system with multiple generator units - A method of operating a power system is provided. The method may include running one or more of a plurality of generator units that each include a power source, a first electric generator, and a second electric generator. Additionally, the method may include supplying electricity from one or more of the first electric generators of the one or more running generator units to a first set of one or more electric power loads. The method may also include supplying electricity from one or more of the second electric generators of the one or more running generator units to a second set of one or more electric power loads. | 12-04-2008 |
| 318148000 | Alternating-current-motor system | 4 |
| 20080211437 | POWER SUPPLY SYSTEM FOR DRIVING ELECTRIC ROTATING MACHINE - An electric power supply system for driving an electric rotating machine has a generator supplied with driving power from an engine to generate alternating-current electric power and a matrix converter as an alternating-current to alternating-current direct converter supplied with the alternating-current electric power to output arbitrary alternating-current electric power. By driving a motor with the alternating-current electric power supplied from the matrix converter, only one time electric power conversion is carried out to provide high efficiency in the whole system. In addition, electric power loss can be reduced so as to enhance a motor output when the system is applied to a vehicle power supply system. | 09-04-2008 |
| 20080258656 | Control apparatus for electric vehicles - In a hybrid vehicle control apparatus, a motor control unit executes input power control on a MG unit to stabilize a system voltage. This input power control for MG unit is executed independently from torque control on an AC motor so that the input power control and the torque control are stabilized. The motor control unit further adjusts a current control gain for torque control in accordance with an input power amount of the MG unit. As a result, the current control gains of a q-axis current and a d-axis current for torque control are varied in correspondence to variations in torque variation rate in the q-axis direction and the d-axis direction in accordance with the input power amount, so that the torque is restricted from varying with variations in the q-axis current or the d-axis current. | 10-23-2008 |
| 20080315803 | HYBRID ELECTRIC VEHICLE - A hybrid electric vehicle includes, in one example, a motor-generator driven by an engine to generate alternating current, wherein the motor-generator is further configured to start the engine, a motor for driving the vehicle, a diode rectifier to rectify alternating current generated by the motor-generator, an inverter connected to a feed circuit between the diode rectifier and the motor to convert direct current in the feed circuit into alternating current, a power supply connected to a line connecting the diode rectifier with the inverter, a first feed circuit to supply current to the motor to drive the vehicle through the diode rectifier and the inverter in series a second feed circuit to connect the motor-generator with the power supply while bypassing at least the diode rectifier, and an alternating current converter provided in the second feed circuit. | 12-25-2008 |
| 20100237808 | EFFICIENT GENERATOR GRID CONNECTION SCHEME POWERING A LOCAL VARIABLE FREQUENCY MOTOR DRIVE - A system for using a generator to simultaneously power a variable frequency motor drive locally and provide clean power to a grid comprising an electric generator supplying alternating current to a power conversion system. The power conversion system includes a converter changing generator AC output to direct current (DC); a capacitor bank that filters the DC from the converter and outputs a DC bus power; a grid inverter capable of replicating grid power from the DC bus power; and an output filter for supplying power to the power grid. A variable frequency motor drive receives DC bus power from the power conversion system. The variable frequency motor drive may be operatively connected to the power conversion system, or integrated therein. | 09-23-2010 |
| 318149000 | With plural, diverse or diversely controlled generators | 3 |
| 20120249022 | EFFICIENT VEHICLE POWER SYSTEMS - An improved gas-electric power delivery system is provided. The invention provides an array of internal combustion engine-powered electric generators and an array of electric drive motors wherein each electric drive motor connects to a common shaft. The common shaft of the electric drive motor array connects to a mechanical load of varying power demand. The electric drive motors draw power from a battery in response to demands on the motors by the varying power demands of the external load. The array of electric generators charges the battery and each such generator turns on and off, as needed, to maintain the battery charge in response to demands on the battery by the electric drive motor array. Each electric motor connected to a common shaft in the electric motor array also turns on and off, as needed, to meet the varying power demands of the external load. | 10-04-2012 |
| 20160036367 | VARIABLE SPEED GENERATOR AND MOTOR - A system for supplying power to a motor driven pump. The system includes a variable speed electrical generator driven by an engine and a variable frequency drive connected to the output of the generator. The motor is powered by the output of the variable frequency drive. The system also includes a controller for changing the frequency of the output of the variable frequency drive and thereby changing the speed of the motor and the pump. | 02-04-2016 |
| 20170237372 | INVERTER MODULE FOR A LOCOMOTIVE | 08-17-2017 |
| 318150000 | With flywheel on generator or on motor | 3 |
| 20090072771 | Magnetic motor generator having a floating flywheel - A magnetic motor generator that produces electric power by rotating a one piece magnetic floating flywheel assembly that is operated by a linear induction motor and repelled upward by a stationary natural magnet. The floating flywheel assembly magnetic axel rotates inside magnetic collar bearings, which have repelling stationary magnets to center the axel at speed. The floating flywheel assembly rotors move inside generator stators to generate electric power. The floating flywheel assembly has no physical contact with other components to prevent bearing losses at speed. A timing computer controls the operation of the linear induction motor, assesses the speed of the floating flywheel assembly and fires only when necessary to maintain rotation. The moving components are enclosed in a vacuum chamber to prevent wind resistance, or windage losses at speed. Surplus electric power can ether be stored/used by the system or used to supply a load. | 03-19-2009 |
| 20120161678 | MANAGEMENT APPARATUS OF A ROTATING MOTOR AND AN ANNEXED LOAD DURING POWER LOSS - A management apparatus is described of a rotating motor and a load during power loss; the apparatus comprises a first switching circuit coupled with the rotating motor and a controller of said first switching circuit. The controller is configured to drive the first switching circuit so as to convert a back-electromotive force voltage developed in the rotating motor into a power supply voltage for the load. The first switching circuit is driven in accordance with a first duty cycle. The apparatus comprises a second switching circuit coupled with the load and driven in accordance with a second duty cycle. The controller is configured to vary said first and said second duty cycles to keep the power supply voltage for the load above or equal to a threshold voltage. | 06-28-2012 |
| 20140097771 | ELECTRIC ACTUATOR DRIVE DEVICE - The present invention aims to respond a transient high instantaneous current that flows during acceleration of an electric actuator as well as to reduce the size and weight. The present invention is an electric actuator driver, including: an electric actuator ( | 04-10-2014 |
| 318151000 | Control of both the generator and the circuit to the motor | 3 |
| 20140340005 | Power Conversion Device - In a system for driving an electric motor by an engine generator, there is a possibility that the effects of harmonics and DC voltage fluctuations of a power converter cause shaft oscillation to increase due to a phenomenon in which current pulsations caused by voltage disturbances at a d-axis and a q-axis are strengthened each other and thus oscillation and d-axis current are increased under the effect of interference between the d-axis and the q-axis. In an engine generator system, a power converter ( | 11-20-2014 |
| 318152000 | With motor control | 2 |
| 20100097016 | GENERATOR ASSEMBLY - A generator assembly including generator means and a first converter member ( | 04-22-2010 |
| 20110248654 | Self-Propelled Working Machine with Electrical Drive System and Processes for Operating the Same - The present invention relates to a self-propelled working machine, especially in the form of a surface milling machine, such as asphalt-milling machine or snow-milling machine comprising a main operating unit and/or a drive unit, which is operable in a steady-state or near steady-state operating status and is drivable by a drive device comprising at least an electrical motor, the electrical motor being associated with a start-up including a frequency converter for the limitation of starting current. The invention also relates to a process for operating such a self-propelled working machine. According to the invention an operating circuit for steady-state operation is provided, comprising a jumper for bridging the frequency converter following starting or reaching steady-state operational status. Optionally, the jumper is switchable to activate or inactivate the frequency converter of the start-up circuit, respectively. | 10-13-2011 |
| 318153000 | Control of both the generator and the motor | 1 |
| 20100219779 | VARIABLE DRIVE GAS TURBINE ENGINE - A system and method for variable drive of a propeller or fan of a gas turbine engine. The gas turbine engine has a combustor and a turbine arranged to be driven by a combustion product from the combustor. The variable drive system comprises a primary shaft arranged for transmission of torque from said turbine to the propeller; an electric generator arranged to be driven by said turbine; and an electric motor arranged to be driven by the output of said generator. A clutch is mounted between the propeller and the primary rotor and is operable to mechanically disconnect the shaft from the propeller so that the propeller can be driven by any or any combination of the turbine and/or electric motor. The invention may be applied to a turboprop or turbofan engine having a gearing between the shaft and propeller or fan and may be particularly suited to unmanned aerial vehicle propulsion. | 09-02-2010 |
