Abstract

A launch system for an amusement vehicle ride, said launch system comprising a Direct Current, DC, bus having a DC bus voltage, a power input arranged to be connected to an Alternating Current, AC, power grid, a rectifier arranged for receiving AC power via said power input, and for converting said AC power to a Direct Current, DC, power, and for providing said DC power to said DC bus, an auxiliary power supply connected to said DC bus for providing said DC bus voltage, a DC/AC converter having an input connected to said DC bus and an output arranged to be connected to one or more motors for driving said amusement vehicle ride, said DC/AC converter arranged for converting said DC power to an AC power for providing said AC power to said one or more motors, wherein said DC/AC converter is arranged to provide at least 1000A to said one or motors, a controller for controlling said DC/AC converter, wherein said auxiliary power supply comprises a plurality of battery cells.

IPC Classes  ?

• H02J 7/34 - Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
• A63G 21/20 - Slideways with movably suspended cars, or with cars moving on ropes, or the like
• A63G 21/00 - ChutesHelter-skelters
• A63G 7/00 - Up-and-down-hill tracks or switchbacks

Abstract

An electric multi-mode drive system (400), a method for operating the same, a vehicle (110) and a track (401). The system is arranged for operating at one part (402) of the track (401), at a station (410; 411), an electric Linear Doubly Fed Motor, LDFM, (310) for launching the vehicle (110), and for operating at another part (403) of the track (401), between stations (410; 411), a further electric motor (320; 330; 340; 350), not an LDFM, arranged for at least one of accelerating, coasting and restarting movement of the vehicle (110) after launching. Electric power for operating the further electric motor (320; 330; 340; 350), is provided by an on-board rechargeable electrical energy storage device. With the LDFM (310), sufficient power is generated for accelerating the vehicle (110), and recharging the on-board electrical energy storage device during standstill, braking and/or launching.

IPC Classes  ?

• B60L 13/03 - Electric propulsion by linear motors
• B60L 13/04 - Magnetic suspension or levitation for vehicles
• B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• B60L 50/60 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
• B60L 9/16 - Electric propulsion with power supply external to the vehicle using AC induction motors
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• B60L 50/40 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by capacitors
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• B61B 13/10 - Tunnel systems

Abstract

A method of and a device, borehole drilling equipment and a computer program product for estimating at least one of down hole speed and down hole torque of borehole drilling equipment while drilling a borehole in an earth formation. The borehole equipment comprising a rotational drive system, a drill string, a bottom hole assembly comprising a drill bit, a top end coupled to the rotational drive system, and a speed controller arranged for controlling rotational top end drive speed by commanding a top end drive torque. The method being performed in a computer based on a two-port spectral domain transfer matrix computational model of the borehole drilling equipment. While drilling, rotational top end drive speed and top end drive torque are obtained and down hole speed and down hole torque of the borehole drilling equipment are calculated by reducing spectral bandwidth of and applying a time delay term to the calculations enabling a causal time domain solution.

IPC Classes  ?

• E21B 44/04 - Automatic control of the tool feed in response to the torque of the drive
• G05B 15/02 - Systems controlled by a computer electric
• G06F 17/16 - Matrix or vector computation
• E21B 45/00 - Measuring the drilling time or rate of penetration
• E21B 47/12 - Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling

Abstract

An electric multi-mode drive system (400), a method for operating the same, a vehicle (110) and a track (401). The system is arranged for operating at one part (402) of the track (401), at a station (410; 411), an electric Linear Doubly Fed Motor, LDFM, (310) for launching the vehicle (110), and for operating at another part (403) of the track (401), between stations (410; 411), a further electric motor (320; 330; 340; 350), not an LDFM, arranged for at least one of accelerating, coasting and restarting movement of the vehicle (110) after launching. Electric power for operating the further electric motor (320; 330; 340; 350), is provided by an on-board rechargeable electrical energy storage device. With the LDFM (310), sufficient power is generated for accelerating the vehicle (110), and recharging the on-board electrical energy storage device during standstill, braking and/or launching.

IPC Classes  ?

• B60L 13/03 - Electric propulsion by linear motors
• B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• B60L 13/04 - Magnetic suspension or levitation for vehicles
• B60L 9/16 - Electric propulsion with power supply external to the vehicle using AC induction motors

Abstract

A method of and a device, borehole drilling equipment and a computer program product for estimating at least one of down hole speed and down hole torque of borehole drilling equipment while drilling a borehole in an earth formation. The borehole equipment comprising a rotational drive system, a drill string, a bottom hole assembly comprising a drill bit, a top end coupled to the rotational drive system, and a speed controller arranged for controlling rotational top end drive speed by commanding a top end drive torque. The method being performed in a computer based on a two-port spectral domain transfer matrix computational model of the borehole drilling equipment (50). While drilling, rotational top end drive speed and top end drive torque are obtained (54) and down hole speed and down hole torque of the borehole drilling equipment are calculated (55) by reducing spectral bandwidth of and applying a time delay term to the calculations (53) enabling a causal time domain solution.

IPC Classes  ?

• E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systemsSystems specially adapted for monitoring a plurality of drilling variables or conditions

Abstract

A method of and a device, borehole drilling equipment and a computer program product for estimating at least one of down hole speed and down hole torque of borehole drilling equipment while drilling a borehole in an earth formation. The borehole equipment comprising a rotational drive system, a drill string, a bottom hole assembly comprising a drill bit, a top end coupled to the rotational drive system, and a speed controller arranged for controlling rotational top end drive speed by commanding a top end drive torque. The method being performed in a computer based on a two-port spectral domain transfer matrix computational model of the borehole drilling equipment (50). While drilling, rotational top end drive speed and top end drive torque are obtained (54) and down hole speed and down hole torque of the borehole drilling equipment are calculated (55) by reducing spectral bandwidth of and applying a time delay term to the calculations (53) enabling a causal time domain solution.

IPC Classes  ?

• E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systemsSystems specially adapted for monitoring a plurality of drilling variables or conditions

Abstract

A method of and a device for computer controlled determination of operational parameters of a computational model of borehole equipment for drilling a borehole in an earth formation are described. The borehole equipment has a rotational drive system, a drill string having a bottom hole assembly and a top end coupled to the rotational drive system, and a speed controller for controlling rotational drive speed of the drive system. The drive system is controlled such that a torque provided by the drive system while driving the drill string is varied over a time period. From the varying torque and rotational top end drive speed of the drill string an estimated torque-speed transfer function is obtained and matched with a torque-speed transfer function computed from the computational model of the borehole equipment. The operational parameters are determined from the matched estimated torque-speed transfer function and the computed torque-speed transfer function.

IPC Classes  ?

• G01V 3/00 - Electric or magnetic prospecting or detectingMeasuring magnetic field characteristics of the earth, e.g. declination or deviation
• E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systemsSystems specially adapted for monitoring a plurality of drilling variables or conditions

Abstract

A method for mitigating stick-slip oscillations in borehole equipment while drilling a borehole in an earth formation is described. The borehole equipment is modelled by a computational model for computer simulation. The model has elements representing a particular mechanical and physical behavior of the borehole equipment. In a simulated stick mode of the borehole equipment, physical quantities are loaded to the elements, which quantities represent an initial state of the borehole equipment prior to a transition from stick mode to slip mode. From a simulation of such transition, a time response of rotational speeds of a drive system and bottom hole assembly of the borehole equipment is recorded and a lower limit of the rotational speed of the drive system is determined for which the rotational driven speed of the bottom hole assembly is zero.

IPC Classes  ?

• E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systemsSystems specially adapted for monitoring a plurality of drilling variables or conditions
• G05D 19/02 - Control of mechanical oscillations, e.g. of amplitude, of frequency, of phase characterised by the use of electric means
• E21B 41/00 - Equipment or details not covered by groups