Patents by Inventor Peter Lundberg
Peter Lundberg has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20110091090Abstract: Present invention discloses systems and methods for improvement of magnetic resonance images. Correction of a chemical shift artefact in an image acquired from a magnetic resonance imaging system is obtained by a system and a method involving iterative-compensation for the misregistration effect in an image domain. Correction of an intensity inhomogeneity in such images is obtained by a system and a method involving locating voxels corresponding to pure adipose tissue and estimating correction field from these points.Type: ApplicationFiled: April 17, 2009Publication date: April 21, 2011Inventors: Olof Dahlqvist Leinhard, Magnus Borga, Peter Lundberg
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Publication number: 20100162799Abstract: The present invention relates to a device for a torque meter for determining of for example viscosity, shearing force or concentration of liquids or suspensions, and comprising two elastically connected concentric axles, one external hollow axle (6) through which an inner meter axle (5) extends, on which latter an element (4) responsive to the measurement medium (3) is located. According to the invention the axles (6, 5) are propelled by an electrical motor (9, 10), said motors are at least on average continuously propelled at equal rotational speed at the same time the phase between the two is being controlled irrespective of the applied speed and torque, wherein the torque is possible to measure through the degree of load at the motor (10) propelling the inner axle (5), which is transformable to a suitable out signal.Type: ApplicationFiled: December 19, 2007Publication date: July 1, 2010Inventors: Niclas Andersson, Joakim Kullander, Peter Lundberg, Peter Adrian
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Publication number: 20100111768Abstract: The present invention comprises systems and devices for sequencing of nucleic acid, such as short DNA sequences from clonally amplified single-molecule arrays.Type: ApplicationFiled: March 30, 2007Publication date: May 6, 2010Applicant: SOLEXA, INC.Inventors: Saibal Banerjee, Colin Barnes, Kevin Benson, John Bridgham, Jason Bryant, Dale Buermann, Sergey Etchin, Jonny Ho, Xavier Lee, Peter Lundberg, Klaus Maisinger, Bojan Obradovic, Mark Pratt, Isabelle Rasolonjatovo, Mark Reed, Chiara Rodighiero, Subra Sankar, Gary Schroth, Ning Sizto, Harold Swerdlow, Eric Vermaas
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Patent number: 7347107Abstract: Device for a torque or shear transmitter for determining fibre concentration or viscosity in pulp suspensions and which is adapted to measure an angle deviation between two concentric shafts whereby the angle deviation forms a function of the torque applied on the measuring body. The device includes a feedback system for bringing the inner or measuring shaft to a zero position independent of the magnitude of the torque. The system includes an electromagnetic feedback coil, which encircles two pole shoes journalled in bearing points at the end of the outer shaft, at the same time as each pole shoe is connected to the measuring shaft, whereby a current, generated by a transducer and dependent on the angle deviation, is sent to the winding of the coil, where a magnetic field of force is generated.Type: GrantFiled: December 6, 2004Date of Patent: March 25, 2008Assignee: BTG Pulp and Paper Sensors ABInventors: Peter Lundberg, Joakim Kullander
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Patent number: 7321500Abstract: A voltage source converter for high power application containing a plurality of valves, each valve containing a plurality of extinguishable semiconducting elements, and a valve control unit containing a computer and a pulse-width modulator providing an executing control signal for controlling the semiconducting elements. The valve control unit includes a first control containing a first pulse-width modulator for providing a first pulse-width modulation signal, a second control containing a second pulse-width modulator for providing, a second pulse-width modulation signal, a mode detector, and a selector connected to the first and second pulse-width modulator for selecting in dependence of the mode detector the executing pulse-width modulation signal.Type: GrantFiled: April 28, 2006Date of Patent: January 22, 2008Assignee: ABB Technology Ltd.Inventors: Gunnar Asplund, Ying Jiang Häfner, Johan Lindberg, Peter Lundberg, Jan Svensson, Rolf Pålsson
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Publication number: 20070277595Abstract: Device for a torque or shear transmitter for determining fibre concentration or viscosity in pulp suspensions and which is adapted to measure an angle deviation between two concentric shafts whereby the angle deviation forms a function of the torque applied on the measuring body. The device includes a feedback system for bringing the inner or measuring shaft to a zero position independent of the magnitude of the torque. The system includes an electromagnetic feedback coil, which encircles two pole shoes journalled in bearing points at the end of the outer shaft, at the same time as each pole shoe is connected to the measuring shaft, whereby a current, generated by a transducer and dependent on the angle deviation, is sent to the winding of the coil, where a magnetic field of force is generated.Type: ApplicationFiled: December 6, 2004Publication date: December 6, 2007Inventors: Peter Lundberg, Joakim Kullander
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Publication number: 20060256587Abstract: A voltage source converter for high power application containing a plurality of valves, each valve containing a plurality of extinguishable semiconducting elements, and a valve control unit containing a computer and a pulse-width modulator providing an executing control signal for controlling the semiconducting elements. The valve control unit includes a first control containing a first pulse-width modulator for providing a first pulse-width modulation signal, a second control containing a second pulse-width modulator for providing, a second pulse-width modulation signal, a mode detector, and a selector connected to the first and second pulse-width modulator for selecting in dependence of the mode detector the executing pulse-width modulation signal.Type: ApplicationFiled: April 28, 2006Publication date: November 16, 2006Applicant: ABB Technology Ltd.Inventors: Gunnar Asplund, Ying Hafner, Johan Lindberg, Peter Lundberg, Jan Svensson, Rolf Palsson
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Patent number: 6995994Abstract: The invention relates to a converter provided with a resonant circuit (16), which converter comprises a device (31) for measuring the derivative (dI/dt) of the current through the current valves 82, 3) and a detection device (32) co-operating with said measuring device (31) for detecting a short-circuit in the converter, the detection device (32) being adapted to detect a short-circuit current when the current derivative (dI/dt) measured by the measuring device (31) is equal to or exceeds a stipulated current derivative limit value (dI/dtlim) during a length of time exceeding a stipulated time limit value (tlim). The invention also relates to a method for controlling such a converter.Type: GrantFiled: September 17, 2002Date of Patent: February 7, 2006Assignee: ABB ABInventors: Bo Bijlenga, Peter Lundberg, Tomas Jonsson, Nicklas Johansson, Esie Ramezani
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Patent number: 6898095Abstract: The invention relates to a VSC-converter for converting direct voltage into auxiliary voltage and vice versa, which comprises a series connection of at least two current valves (5, 6) arranged between two poles (7, 8), a positive and a negative, of a direct voltage side of the converter, each current valve comprising several series connected circuits (12), each of which circuits comprising a semiconductor component (13) of turn-off type and a rectifying component (14) connected in anti-parallel therewith, an alternating voltage phase line (16) being connected to a midpoint (15), denominated phase output, of the series connection of current valves (5, 6) between two of said current valves while dividing the series connection into two equal parts.Type: GrantFiled: April 10, 2002Date of Patent: May 24, 2005Assignee: ABB ABInventors: Bo Bijlenga, Gunnar Asplund, Peter Lundberg, Tomas Jonsson, Niklas Johansson, Staffan Norrga
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Publication number: 20050063124Abstract: An electrical apparatus for limiting the peak voltage across a recttifying member (23) of a current valve arranged in a circuit having a substantial inductance (24) and having at least one controllable semiconductor device (22) and at least one said rectifying member (23) connected in anti-parallel therewith when the rectifying member is turning off, comprises means (28, 29) adapted to control the semiconductor device so as to increase the conductivity thereof during turning off of the rectifying member.Type: ApplicationFiled: July 4, 2002Publication date: March 24, 2005Inventors: Peter Lundberg, Bo Bijlenga, Falah Al-Hosini, Nicklas Johansson
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Publication number: 20040246756Abstract: The invention relates to a converter provided with a resonant circuit, in which converter the resonant circuit comprises means for detecting a zero current condition in the auxiliary valve. The means is adapted to send to the control device of the converter signals indicating a prevailing zero current condition in the auxiliary valve, and the control device is adapted to allow a turn-off of a semiconductor component of turn-off type of the auxiliary valve only after the receipt by the control device of a signal indicating a prevailing zero current condition in the auxiliary valve. The invention also relates to a method for controlling such a converter.Type: ApplicationFiled: March 16, 2004Publication date: December 9, 2004Inventors: Bo Bijlenga, Nicklas Johansson, Tomas Jonsson, Peter Lundberg, Staffan Norrga
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Publication number: 20040240240Abstract: The invention relates to a converter provided with a resonant circuit (16), which converter comprises a device (31) for measuring the derivative (dI/dt) of the current through the current valves 82, 3) and a detection device (32) co-operating with said measuring device (31) for detecting a short-circuit in the converter, the detection device (32) being adapted to detect a short-circuit current when the current derivative (dI/dt) measured by the measuring device (31) is equal to or exceeds a stipulated current derivative limit value (dI/dtlim) during a length of time exceeding a stipulated time limit value (tlim). The invention also relates to a method for controlling such a converter.Type: ApplicationFiled: March 2, 2004Publication date: December 2, 2004Inventors: Bo Bijlenga, Peter Lundberg, Tomas Jonsson, Nicklas Johansson, Esie Ramezani
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Publication number: 20040218318Abstract: The invention relates to a VSC-converter for converting direct voltage into auxiliary voltage and vice versa, which comprises a series connection of at least two current valves (5, 6) arranged between two poles (7, 8), a positive and a negative, of a direct voltage side of the converter, each current valve comprising several series connected circuits (12), each of which circuits comprising a semiconductor component (13) of turn-off type and a rectifying component (14) connected in anti-parallel therewith, an alternating voltage phase line (16) being connected to a midpoint (15), denominated phase output, of the series connection of current valves (5, 6) between two of said current valves while dividing the series connection into two equal parts.Type: ApplicationFiled: June 4, 2004Publication date: November 4, 2004Inventors: Bo Bijlenga, Gunnar Asplund, Peter Lundberg, Tomas Jonsson, Niklas Johansson, Staffan Norrga
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Patent number: 6278314Abstract: An electric circuit comprises a plurality of high power switching services connected in series and adapted to be controlled to be all conducting or blocking substantially simultaneously act together as a single switch and each holding a part of a high voltage to be held by the switch in the blocking state of the switching devices. Each switching device has an avalanche diode of SiC connected in anti-parallel therewith and adapted to start to conduct current when reverse biased as of a predetermined voltage limit for preventing that the voltage across the respective switching device exceeds such limit.Type: GrantFiled: December 8, 1998Date of Patent: August 21, 2001Assignee: ABB Research Ltd.Inventors: Gunnar Asplund, Bo Danielsson, Willy Hermansson, Peter Lundberg, Christer Ovrén, Anders Åberg
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Patent number: 6021036Abstract: A method and a device for controlling a switching operation consisting of a turn on or a turn off operation in a voltage controlled power transistor is provided. At least one current source is arranged at the control electrode of the power transistor. The at least one current source controls the recharging of at least one of the capacitances which occurs between the control electrode of the power transistor and the main electrode of the power transistor to determine the time rate of change of at least one of the voltage and current.Type: GrantFiled: August 18, 1998Date of Patent: February 1, 2000Assignee: ABB Research Ltd.Inventors: Bo Bijlenga, Peter Lundberg, Anders Persson, Lennart Zdansky
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Patent number: 5990724Abstract: In a method and apparatus used for detecting and handling a short circuit in a circuit having a plurality of power semiconductors connected in series the voltage is divided across the electrodes and each power semiconductor and the magnitude of a small proportion of the voltage is measured. The magnitude of the voltage is compared to a reference voltage at least from when the power semiconductor is turned on. The reference voltage is higher than the maximum voltage across the power semiconductor during normal operation. A short circuit is detected when the magnitude of the measured voltage exceeds the reference voltage.Type: GrantFiled: August 29, 1997Date of Patent: November 23, 1999Assignee: Asea Brown Boveri ABInventors: Bo Bijlenga, Peter Lundberg
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Patent number: 5828539Abstract: A method and a device for control of a switching operation consisting of a turn-on or turn-off operation in a voltage-controlled power transistor (T1), wherein at least one current source (S1, S2) is arranged at the control electrode (G) of the power transistor for controlling the recharging of at least one of the capacitances which occurs between the control electrode (G) of the power transistor and the main electrodes (C, E) of the power transistor and thus to determine the time rate of change of at least one of the quantities voltage and current.Type: GrantFiled: October 30, 1996Date of Patent: October 27, 1998Assignee: ABB Research Ltd.Inventors: Bo Bijlenga, Peter Lundberg, Anders Persson, Lennart Zdansky
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Patent number: 5686660Abstract: The invention relates to concentration measurement transmitters, more specifically to an arrangement for a static, blade-type transmitter, which includes a blade active in the medium to be measured and suspended by a spindle such that shear force moment at the blade is translated via the spindle to a measurement converter for determining fiber concentration in the medium, the converter preferably being situated in the transmitter housing, into which the spindle extends and is sealed against it with the aid of a lead-through.Type: GrantFiled: June 27, 1996Date of Patent: November 11, 1997Assignee: BTG Kalle Inventing ABInventor: Peter Lundberg
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Patent number: 5572191Abstract: An article security element is provided which, regardless of its orientation in relation to a scanning field irradiated by a transmitter coil, can generate a response field which can be reliably detected by a receiver coil. The article security element preferably has a soft magnetic metal strip which is wound about an oblong, column-shaped base body at a winding angle which has a value between about 30 degrees and about 60 degrees with respect to the longitudinal axis of the base body.Type: GrantFiled: March 17, 1994Date of Patent: November 5, 1996Assignee: Esselte Meto International GmbHInventor: Peter Lundberg
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Patent number: 4677846Abstract: The invention relates to a method and device for measuring and regulating the concentration, preferably of a fibre suspension, with the aid of a blade (1) pivotally suspended in the suspension. The blade (1) is caused to pivot such that its trailing end (8) moves between two end positions (A,B) in the suspension for providing a predetermined angular stroke (.alpha.). Time measurement is carried out when the trailing edge (8) of the blade (1) moves through its stroke from its upper end position (A) to its lower end position (B). The time obtained is a parabolic function of the concentration and varies in response to the shear force resistance in the fibre suspension of the blade (1) during its angular stroke, and thus in response to the concentration of solid substances in the suspension.Type: GrantFiled: November 27, 1985Date of Patent: July 7, 1987Assignee: Eur-Control Kalle ABInventor: Peter Lundberg