Quotables
"What can be more palpably absurd than the prospect held out of locomotives traveling twice as fast as stagecoaches?"
The Quarterly Review ; March edition, 1825
PatentStorm News
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 |
| 7971688 | Adjustment of transport system parameters using a power model A system and a method for the adaptation of parameters in a transport system involve a power model which describes power flow in the transport system by means of transport system parameters, which include input parameters and status parameters. The system and method... | 07/05/2011 |
| 7954604 | Elevator speed control device, elevator speed controlling method and elevator speed controlling program An elevator speed governor for an elevator in which an elevator car (1) is attached to one end of a rope (2) having a counterweight (3) on the other end and driven by a motor (5) via the rope (2) comprises a motor current detector ... | 06/07/2011 |
| 7931128 | Elevator device In an elevator device, a drive unit has a drive sheave, a motor for rotating the drive sheave, and a motor driving portion for driving the motor. The motor driving portion is controlled by a control unit. When a car is running, the control unit monitors a load on at... | 04/26/2011 |
| 7748502 | Elevator apparatus In an elevator apparatus, a single car is raised and lowered by a plurality of hoisting machines. An elevator control device for controlling the hoisting machines generates speed commands separately for the hoisting machines. When a current value of one of the hoist... | 07/06/2010 |
| 7658268 | Control device without a speed sensor for controlling speed of a rotating machine driving an elevator A control device for a rotating machine driving an elevator suppresses increases in the moving time of the elevator while securing control and stability in accordance with moving direction and load of a car of the elevator. A control device for controlling speed of ... | 02/09/2010 |
| 7637353 | Control device for elevator A control apparatus for an elevator has a speed command issuing portion, a movement control portion, and an acceleration limiting portion. The speed command issuing portion calculates a speed command for controlling a speed of a car. The movement control portion con... | 12/29/2009 |
| 7588125 | Elevator control device An elevator control device that drives a cage in a high-efficient speed pattern without using a load detector such as a conventional scale device. The elevator control device includes: a current detector for detecting a current that is supplied to a motor from an in... | 09/15/2009 |
| 7478706 | Method and apparatus of operating a drive with linear motor A drive, a method of operating the drive and an elevator operated by the drive for the movement of persons or goods by at least one car utilize a linear motor. The drive includes at least one linear motor with a secondary part positioned between a first primary part... | 01/20/2009 |
| 7434666 | Method and system for measuring the stopping accuracy of an elevator car The invention relates to a condition monitoring method and a corresponding system for measuring the stopping accuracy of an elevator car. In the invention, a door zone is defined for each floor, a door zone detector is mounted on the elevator car, the elevator car i... | 10/14/2008 |
| 7377363 | Elevator with variable drag for car and counterweight An elevator car and counterweight system is provided with a variable drag element. The variable drag element is controlled such that the lower of the counterweight and the car has a higher drag against further movement. In an embodiment which is particularly useful ... | 05/27/2008 |
| 7370366 | Data management system and method A data management system and method are provided. Specifically, the present invention includes a system for controlling access to data and ensuring that the confidentiality of the data is maintained. In addition, the present invention provides a system for updating ... | 05/06/2008 |
| 7350883 | Detecting elevator brake and other dragging by monitoring motor current Elevator brake or other drag is checked by establishing (10-13) baseline motor currents at plural determined positions as the car is moved up and down both empty and with full load. In a normal run (21), the load is recorded (22) and the ... | 04/01/2008 |
| 7327111 | System and method for parallel control of variable frequency drives A method for controlling at least two variable frequency drives connected in parallel. The method comprises, for each variable frequency drive, communicating a magnetizing current component value to a master controller, and receiving a speed demand, a flux demand, a... | 02/05/2008 |
| 7316297 | Elevator escape device Provided is an elevator escape device. In response to a stop of the elevator due to power outage, a trapped person may press a switch to activate a backup generator, and either a backup electromagnetic contact is enabled if the backup generator functions normally or... | 01/08/2008 |
| 7314120 | Motor control for elevator using two control signals A method and a system for controlling an elevator that does not change the torque direction, such as an elevator without counterweight. The elevator has an alternating-current electric motor (M1), such as a permanent magnet motor or an asynchronous motor, and... | 01/01/2008 |
| 7280899 | S-type smooth command generating method and means thereof An S-type smooth command generating method and the means thereof are provided to process the motion commands smoothly, thereby generating continuous velocity commands and position commands. The provided method not only improves the motor's ability of acceleration/de... | 10/09/2007 |
| 7271566 | Method and system for managing the voltage on the DC bus of a speed controller for an AC motor A method and system for managing the voltage of a DC bus of a speed controller for an AC electric motor linked to a current distribution network. The method includes comparing a value of the voltage measured on the DC bus with a determined limit value, when the valu... | 09/18/2007 |
| 7268514 | Motor control for stopping a load and detecting mechanical brake slippage A method and apparatus for stopping an AC motor that is controlling a load while detecting mechanical brake slippage of a mechanical brake for holding the load against movement includes a controller for decreasing torque-producing current commands from the drive whi... | 09/11/2007 |
| 7264087 | Control of a counterweightless elevator using total mass of the elevator Method and system of controlling a counterweightless elevator system provided with an elevator car and a variable speed drive with an electric motor. The elevator car load is weighed, and the elevator system is controlled in order to reduce the physical/electrical d... | 09/04/2007 |
| 7260452 | Apparatus, method and computer program product for monitoring AC line current through the step start resistors of a high voltage power supply A circuit to monitor ac line current through resistors employed to provide a ‘step start’ in a power supply, including means to monitor the current flowing through the step start resistors, comprising a peak detector, a sample and hold circuit, an analog to digi... | 08/21/2007 |
| 7199535 | Doubled-ended inverter drive system topology for a hybrid vehicle A double-ended inverter system for a vehicle having a load, a first energy source, and a first inverter system coupled to the first energy source and adapted to drive the load. The double-ended inverter system further having a secondary energy source, a second capac... | 04/03/2007 |
| 7196488 | Motor driving apparatus A motor driving apparatus capable of drivingly controlling a plurality of inverter units with a single motor driving command from a motor control unit, and thereby control a large-capacity motor or the like. The motor control unit sends out a single motor driving co... | 03/27/2007 |
| 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 |
| 7154237 | Unified power control method of double-ended inverter drive systems for hybrid vehicles A method of providing a unified power control of a motor including providing a first inverter system, a second inverter system, and a motor coupled therebetween; coupling the first inverter system coupled to a first energy source; coupling the second inverter system... | 12/26/2006 |
| 7147084 | Elevator control using switched speed and position An elevator control method is provided, where the elevator motor is controlled in such manner that the velocity of the elevator follows a speed reference. When the elevator is decelerating, the motor is controlled by a speed adjustment method during the initial dece... | 12/12/2006 |
| 7121385 | Method and apparatus for adjustment of the rotor angle of an elevator motor A method and an apparatus for adjustment of the rotor angle of an elevator motor (M), in which method: the rotor angle of the elevator motor is measured, the rotor angle is adjusted by using the measured rotor angle value as feedback data, and the rotor angle is mea... | 10/17/2006 |
| 7090055 | Boat lift brake apparatus A boat lift braking system includes a threaded shaft driven by the boat lift motor. A torsion tube disposed about the shaft carries an interiorly threaded nut that interengages the peripheral threads of the shaft. A rotor is mounted to the nut adjacent a brake pad t... | 08/15/2006 |
| 7090056 | Double deck elevator that controls a velocity change during inter-cage distance adjustment A double deck elevator including a winding machine which lifts up/down a cage frame loaded with two cages in a vertical direction, a cage driving unit which changes a relative distance between upper and lower cages, and a cage position controller which starts an int... | 08/15/2006 |
| 7078942 | Driving apparatus for generating a driving current using PWM A current driving apparatus includes a first square wave generator (100), a second square wave generator (200), an FET (Field Effect Transistor) (3), and a power supply (9). The first square wave generator has an output connected to the s... | 07/18/2006 |
| 7046527 | Power converter with ripple current cancellation using skewed switching techniques The invention is an electrical power converter using multiple, high frequency switching elements where the individual switching elements are operated in a synchronous, time-skewed arrangement to provide optimum ripple current cancellation. ... | 05/16/2006 |
| 7021427 | Lifting apparatus and method A method for intelligent control includes an exchange of historical parameters of events for operating a system and operating a hoist where an electric motor, preferably a DC-motor, is used for lifting and lowering a lifting belt. It can take place at different spee... | 04/04/2006 |
| 7023153 | Motor control device It is an object of the invention to regulate a control gain without requiring a host controller. In the invention, a command pattern generating section (14) generates a basic operation pattern for operating a motor based on various parameters such as a... | 04/04/2006 |
| 7014014 | Safety device for monitoring a movable element A safety device for monitoring a movable element, in particular, for elevators, is provided. The safety device includes a speed determination unit for determining the speed of the movable element, a comparator device for comparing a predetermined speed with the dete... | 03/21/2006 |
| 7011184 | Increasing traffic handling performance of an elevator system based upon load A method and apparatus for utilizing unused power available in an elevator that is not fully loaded to improve the traffic handling capacity of an elevator system. The present invention can be used to provide an optimized velocity profile for the elevator based on t... | 03/14/2006 |
| 7006897 | Apparatus, method and computer program product for monitoring AC line current through the step start resistors of a high voltage power supply A circuit to monitor AC line current through resistors employed to provide a ‘step start’ in a power supply, including means to monitor the current flowing through the step start resistors, comprising a peak detector, a sample and hold circuit, an analog to digi... | 02/28/2006 |
| 6971482 | Elevator control device When there is a breakdown in either one of first and second power converters supplying electrical power to a multi-winding motor comprising a wind-up mechanism, a rescue operation can be safely and reliably carried out by using the remaining power converter. A wind-... | 12/06/2005 |
| 6634463 | Switch over from the mains supply to a frequency converter by a phase correction process for an escalator drive Method for controlling the drive of a conveyor device (10), especially in the form of an escalator or moving sidewalk, switchable between load operation and no-load operation, having a drive motor (26) and a frequency changer (42) controllable at least wi... | 10/21/2003 |
| 6452353 | System for detection of obstructions in a motorized door system Method of detecting obstructions encountered by a motorized door. The method includes providing a signal processor with one or more signals indicative of a predetermined door trajectory profile for at least a segment of a stroke of the door, the door traj... | 09/17/2002 |
| 6382361 | Elevator An elevator system in which an elevator-car and a counter weight are suspended on a pulley system in a hoistway. The elevator system includes a receiving unit for receiving an electric power from a feeding unit provided in the hoistway, an inverter for co... | 05/07/2002 |
| 6336522 | Deck elevator car with speed control The hoist control device controls the hoist in such a manner that once the speed change of the cage frame has accelerated at a fixed acceleration, constant speed is maintained, after which it decelerates at a fixed deceleration and stops. Meanwhile, the c... | 01/08/2002 |
