Patents by Inventor Stefan Valdemarsson

Stefan Valdemarsson 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).

  • Patent number: 10872740
    Abstract: An electrical DC switching system for extinguishing an electric arc, wherein the electrical DC switching system includes: a main contact arrangement having a first contact and a second contact, the main contact arrangement being operable between a closed position and an open position, a plurality of serial contacts connected in series with each other and connected in parallel with the main contact arrangement, each serial contact being operable between a closed position and an open position, wherein in a current breaking operation the main contact arrangement is configured to be set in the open position before the plurality of serial contacts are configured to be set in their open positions, and a current injection circuit including a resonance circuit configured to be connected across the serial contacts, and a first switch configured to be switched between an open state and a closed state and configured to be connected to the resonance circuit and to the serial contacts, wherein the first switch is configur
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: December 22, 2020
    Assignee: ABB Schweiz AG
    Inventors: Zichi Zhang, Stefan Valdemarsson
  • Patent number: 10837822
    Abstract: The present invention relates to a method and a weighing scale for weighing vehicles, the weighing scale comprising a weighing bridge having a first and second side for entering and leaving the weighing bridge; a weighing circuit comprising a first set of load sensors and a second set of load sensors coupled to a weight indicator, the first set of load sensors being arranged at the first side and the second set of load sensors being arranged at the second side; a measuring circuit arranged to measure at least one unbalance current in the weighing circuit when a vehicle enters or leaves the weighing bridge; a processing circuit arranged to determine at least one point in time when wheels of the vehicle enter the first side or leave the second side based on the at least one unbalance current.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: November 17, 2020
    Assignee: MOTUS WEIGHING AB
    Inventors: Stefan Valdemarsson, Marcus Timmerman
  • Patent number: 10665404
    Abstract: An electrical DC switching system for extinguishing an electric arc, wherein the electrical DC switching system includes: a contact arrangement having a first contact and a second contact, a current injection circuit including a resonance circuit configured to be connected across the contact arrangement, and a first switch connected to the resonance circuit and to the first contact, wherein the first switch is configured to be switched between an open state and a closed state, wherein in the closed state the first switch is configured to enable an injection current to flow through the resonance circuit in a first flow direction and into the contact arrangement in a direction opposite to a flow direction of a contact arrangement arc current, and an arc chute assembly including a plurality of splitter plates configured to extinguish an electric arc across the first contact and the second contact, wherein each splitter plate of the plurality of splitter plates has a layered configuration including a magnetic lay
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: May 26, 2020
    Assignee: ABB Schweiz AG
    Inventors: Erik Johansson, Zichi Zhang, Stefan Valdemarsson
  • Publication number: 20200144008
    Abstract: An electrical DC switching system for extinguishing an electric arc, wherein the electrical DC switching system includes: a main contact arrangement having a first contact and a second contact, the main contact arrangement being operable between a closed position and an open position, a plurality of serial contacts connected in series with each other and connected in parallel with the main contact arrangement, each serial contact being operable between a closed position and an open position, wherein in a current breaking operation the main contact arrangement is configured to be set in the open position before the plurality of serial contacts are configured to be set in their open positions, and a current injection circuit including a resonance circuit configured to be connected across the serial contacts, and a first switch configured to be switched between an open state and a closed state and configured to be connected to the resonance circuit and to the serial contacts, wherein the first switch is configur
    Type: Application
    Filed: May 17, 2018
    Publication date: May 7, 2020
    Inventors: Zichi Zhang, Stefan Valdemarsson
  • Patent number: 10614979
    Abstract: A switchgear includes a circuit breaking section having a moveable contact bridging element and at least one first arc chutes adjacent the contact bridging element, each arc chute including a base plate for connecting to the contact bridging element and a group of splitter plates placed adjacent the base plate, where the splitter plates of the groups are separated from the base plate and each other via air gaps and resistors interconnect at least some of the plates in at least a first of the arc chutes for bypassing corresponding air gaps, wherein the resistors have values in the range 5 k?-1 M?, current ratings below 100 mA and power ratings below 1 W.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: April 7, 2020
    Assignee: ABB Schweiz AG
    Inventors: Zichi Zhang, Stefan Valdemarsson
  • Publication number: 20190355533
    Abstract: A switchgear includes a circuit breaking section having a moveable contact bridging element and at least one first arc chutes adjacent the contact bridging element, each arc chute including a base plate for connecting to the contact bridging element and a group of splitter plates placed adjacent the base plate, where the splitter plates of the groups are separated from the base plate and each other via air gaps and resistors interconnect at least some of the plates in at least a first of the arc chutes for bypassing corresponding air gaps, wherein the resistors have values in the range 5 k?-1 M?, current ratings below 100 mA and power ratings below 1 W.
    Type: Application
    Filed: January 13, 2017
    Publication date: November 21, 2019
    Inventors: Zichi Zhang, Stefan Valdemarsson
  • Publication number: 20190348238
    Abstract: An electrical DC switching system for extinguishing an electric arc, wherein the electrical DC switching system includes: a contact arrangement having a first contact and a second contact, a current injection circuit including a resonance circuit configured to be connected across the contact arrangement, and a first switch connected to the resonance circuit and to the first contact, wherein the first switch is configured to be switched between an open state and a closed state, wherein in the closed state the first switch is configured to enable an injection current to flow through the resonance circuit in a first flow direction and into the contact arrangement in a direction opposite to a flow direction of a contact arrangement arc current, and an arc chute assembly including a plurality of splitter plates configured to extinguish an electric arc across the first contact and the second contact, wherein each splitter plate of the plurality of splitter plates has a layered configuration including a magnetic lay
    Type: Application
    Filed: November 22, 2017
    Publication date: November 14, 2019
    Applicant: ABB Schweiz AG
    Inventors: Erik Johansson, Zichi Zhang, Stefan Valdemarsson
  • Publication number: 20190107433
    Abstract: The present invention relates to a method and a weighing scale for weighing vehicles, the weighing scale comprising a weighing bridge having a first and second side for entering and leaving the weighing bridge; a weighing circuit comprising a first set of load sensors and a second set of load sensors coupled to a weight indicator, the first set of load sensors being arranged at the first side and the second set of load sensors being arranged at the second side; a measuring circuit arranged to measure at least one unbalance current in the weighing circuit when a vehicle enters or leaves the weighing bridge; a processing circuit arranged to determine at least one point in time when wheels of the vehicle enter the first side or leave the second side based on the at least one unbalance current.
    Type: Application
    Filed: March 21, 2017
    Publication date: April 11, 2019
    Applicant: MOTUS WEIGHING AB
    Inventors: Stefan VALDEMARSSON, Marcus TIMMERMAN
  • Patent number: 10002722
    Abstract: A switching system for breaking a current, including a contact arrangement having a first and second terminals, a resonance circuit connectable across the contact arrangement, In the closed state the first switch enables current to flow through the resonance circuit in a first flow direction and into the contact arrangement in a direction opposite to a contact arrangement arc current flow direction. A second switch connected to the resonance circuit and to the second terminal. In the closed state the second switch enables current to flow through the resonance circuit in a second flow direction opposite to the first flow direction.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: June 19, 2018
    Assignee: ABB Schweiz AG
    Inventors: Magnus Backman, Stefan Valdemarsson
  • Publication number: 20180041021
    Abstract: A switching system for breaking a current, including a contact arrangement having a first and second terminals, a resonance circuit connectable across the contact arrangement, In the closed state the first switch enables current to flow through the resonance circuit in a first flow direction and into the contact arrangement in a direction opposite to a contact arrangement arc current flow direction. A second switch connected to the resonance circuit and to the second terminal. In the closed state the second switch enables current to flow through the resonance circuit in a second flow direction opposite to the first flow direction.
    Type: Application
    Filed: February 19, 2016
    Publication date: February 8, 2018
    Inventors: Magnus BACKMAN, Stefan VALDEMARSSON
  • Patent number: 9805888
    Abstract: An electrical switchgear for fast limitation and interruption of fault currents includes a fixed electrode, a movable electrode having a contact portion and a repelling portion, a plurality of contact fingers, and a coil. The coil is arranged adjacent to the repelling portion to induce eddy currents therein, the coil and the fixed electrode being arranged on the same side of the movable electrode, and the repelling portion being movable relative to the coil. The coil has a first dimension between two of its opposite lateral ends and defines an area which corresponds to a majority of a surface area of the repelling portion. The repelling portion provides a continuous current path, having a dimension corresponding to the first dimension, for eddy currents induced by the coil, whereby the movable electrode is pivotally thrown in a direction away from the coil and the fixed electrode, thus providing a circuit trip.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: October 31, 2017
    Assignee: ABB Schweiz AG
    Inventors: Marley Becerra, Stefan Valdemarsson, Maurizio Curnis, Alessio Bergamini, Henrik Breder
  • Publication number: 20170084410
    Abstract: An electrical switchgear for fast limitation and interruption of fault currents. The electrical switchgear which includes a plurality of contact fingers arranged to divide current flowing through the electrical switchgear.
    Type: Application
    Filed: May 19, 2014
    Publication date: March 23, 2017
    Inventors: Marley Becerra, Stefan Valdemarsson, Maurizio Curnis, Alessio Bergamini, Henrik Breder
  • Patent number: 8390236
    Abstract: A drive system is disclosed for operating an electric device. The drive system includes an electric motor having a permanent magnet rotor connectable to the electric device for controlling the operation of it by a limited-angle rotation, the electric motor further including a stator winding. The drive system includes a drive circuit connected to the stator winding. The permanent magnet rotor can be arranged to be aligned to a magnetic field created by the stator winding when supplied with current from the drive circuit, so that a maximum torque can be applied to the rotor and thereby to the movable part within an interval of ±25 degrees around a middle position between two end positions of the limited-angle rotation of the rotor.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: March 5, 2013
    Assignee: ABB Research Ltd
    Inventors: Magnus Backman, Stefan Valdemarsson
  • Patent number: 8373523
    Abstract: An electromagnetic trip device for a circuit breaker is provided. The electromagnetic trip device includes a current path having a conductor guiding an electric current through at least one contact point formed between a fixed and at least one movable contact piece. A contact lever carries the at least one movable contact piece. The contact lever is mounted to be movable between a closed contact position and an open contact position. The electromagnetic trip device also includes a magnetic circuit with an air-gap. The movable contact lever is at least partially located in the air-gap. The electric current flows through the contact lever in a direction substantially perpendicular to the orientation of magnetic flux in the air-gap.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: February 12, 2013
    Assignee: ABB AG
    Inventor: Stefan Valdemarsson
  • Patent number: 8358187
    Abstract: Exemplary embodiments are directed to an electrical overcurrent tripping device for a circuit breaker. The tripping device includes an actuating member which in case of an overcurrent is driven to interact directly or indirectly with a movable contact piece of the circuit breaker to open a contact point in the circuit breaker if the overcurrent is exceeding a preset tripping threshold for a predetermined tripping delay time. The actuating member is coupled to a magnetic circuit such that the driving force acting on the actuating member is created by the magnetic field of the magnetic circuit, said magnetic field being induced by the overcurrent. The actuating member is coupled to an electromagnetic damping arrangement to set the tripping delay time, and is connected to a coupling spring configured to adjust the overcurrent tripping threshold.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: January 22, 2013
    Assignee: ABB AG
    Inventors: Marley Becerra, Stefan Valdemarsson, Henrik Breder
  • Publication number: 20120146749
    Abstract: A drive system is disclosed for operating an electric device. The drive system includes an electric motor having a permanent magnet rotor connectable to the electric device for controlling the operation of it by a limited-angle rotation, the electric motor further including a stator winding. The drive system includes a drive circuit connected to the stator winding. The permanent magnet rotor can be arranged to be aligned to a magnetic field created by the stator winding when supplied with current from the drive circuit, so that a maximum torque can be applied to the rotor and thereby to the movable part within an interval of ±25 degrees around a middle position between two end positions of the limited-angle rotation of the rotor.
    Type: Application
    Filed: June 10, 2011
    Publication date: June 14, 2012
    Applicant: ABB RESEARCH LTD
    Inventors: Magnus BACKMAN, Stefan VALDEMARSSON
  • Publication number: 20120119855
    Abstract: Exemplary embodiments are directed to an electrical overcurrent tripping device for a circuit breaker. The tripping device includes an actuating member which in case of an overcurrent is driven to interact directly or indirectly with a movable contact piece of the circuit breaker to open a contact point in the circuit breaker if the overcurrent is exceeding a preset tripping threshold for a predetermined tripping delay time. The actuating member is coupled to a magnetic circuit such that the driving force acting on the actuating member is created by the magnetic field of the magnetic circuit, said magnetic field being induced by the overcurrent. The actuating member is coupled to an electromagnetic damping arrangement to set the tripping delay time, and is connected to a coupling spring configured to adjust the overcurrent tripping threshold.
    Type: Application
    Filed: November 15, 2011
    Publication date: May 17, 2012
    Applicant: ABB AG
    Inventors: Marley BECERRA, Stefan VALDEMARSSON, Henrik BREDER
  • Publication number: 20120056699
    Abstract: An electromagnetic trip device for a circuit breaker is provided. The electromagnetic trip device includes a current path having a conductor guiding an electric current through at least one contact point formed between a fixed and at least one movable contact piece. A contact lever carries the at least one movable contact piece. The contact lever is mounted to be movable between a closed contact position and an open contact position. The electromagnetic trip device also includes a magnetic circuit with an air-gap. The movable contact lever is at least partially located in the air-gap. The electric current flows through the contact lever in a direction substantially perpendicular to the orientation of magnetic flux in the air-gap.
    Type: Application
    Filed: November 15, 2011
    Publication date: March 8, 2012
    Applicant: ABB AG
    Inventor: Stefan VALDEMARSSON
  • Patent number: 7982142
    Abstract: A diverter switch with an operating member and an electric circuit. The electric circuit has a main branch and a resistance branch connected in parallel with the main branch. Each branch includes a contact and a vacuum switch. The resistance branch also includes a resistance. The main rotary selector contact is always operated before the resistance contact. The operating member is arranged, during operation, always to rotate the main contact in one and the same direction of rotation. Also a corresponding method for operating a diverter switch and use of such a switch.
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: July 19, 2011
    Assignee: ABB Research Ltd.
    Inventors: Lars Jonsson, Tommy Larsson, Petter Nilsson, Stefan Valdemarsson
  • Patent number: 7622829
    Abstract: A rotating electric motor for operating an electric component. The motor is arranged for an operating movement during a limited predetermined angular motion of the rotor of the motor. An electric drive circuit is arranged for the winding of the motor. The electric circuit exhibits at least one branch including an electric energy bank and a thyristor, which are connected in series with the motor winding. Also, a method for breaking, a use of the motor, and an electric switch provided with the motor.
    Type: Grant
    Filed: September 10, 2004
    Date of Patent: November 24, 2009
    Assignee: ABB Research Ltd.
    Inventors: Stefan Valdemarsson, Lars Liljestrand, Philip Kjaer