Patents by Inventor Jerker Hellstroem
Jerker Hellstroem 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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Patent number: 11497142Abstract: An assembly (110) for dissipating heat generated by a heat generating electrical component (16) which is surface mounted on a circuit board (11) in a surface mounting process. The assembly comprises a heat buffer (120) made of a thermally and electrically conducing material, and being surface mounted on the circuit board (11) so as to be soldered to a thermal flag (18) of the heat generating electrical component (16). The assembly further comprises a heat sink (12) in thermal contact with the heat buffer, and a galvanic separation (13) between the heat buffer and heat sink. The heat capacitance of the heat buffer can absorb short term increases in heat dissipation from the electrical component, before the heat is further dissipated to the galvanically separated heat sink. This may drastically improve performance of the surface mounted component.Type: GrantFiled: October 3, 2019Date of Patent: November 8, 2022Assignee: AROS ELECTRONICS ABInventor: Jerker Hellström
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Publication number: 20210378133Abstract: An assembly (110) for dissipating heat generated by a heat generating electrical component (16) which is surface mounted on a circuit board (11) in a surface mounting process. The assembly comprises a heat buffer (120) made of a thermally and electrically conducing material, and being surface mounted on the circuit board (11) so as to be soldered to a thermal flag (18) of the heat generating electrical component (16). The assembly further comprises a heat sink (12) in thermal contact with the heat buffer, and a galvanic separation (13) between the heat buffer and heat sink. The heat capacitance of the heat buffer can absorb short term increases in heat dissipation from the electrical component, before the heat is further dissipated to the galvanically separated heat sink. This may drastically improve performance of the surface mounted component.Type: ApplicationFiled: October 3, 2019Publication date: December 2, 2021Inventor: Jerker HELLSTRÖM
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Patent number: 10778136Abstract: A multiphase electric motor system and a method for controlling a multiphase electric motor system are disclosed. The method for controlling the multiphase electric motor system includes modulating a plurality of carrier signals with a plurality of modulation signals in order to generate a multiphase motor supply signal having a modulated phase signal for each phase of the electric motor. A set of time windows is defined in each period of the multiphase motor supply signal, where an individually selected group of modulated phase signals is modified by delaying the associated carrier signal in each time window, thereby generating a shifted multiphase motor supply signal and providing an efficient DC bus ripple reduction. Hereby, it is e.g. possible to use small filter capacitors/capacitor banks in electrical motor systems. An analogous multiphase electric generator system and method for controlling a multiphase electric generator system are disclosed.Type: GrantFiled: November 10, 2017Date of Patent: September 15, 2020Assignee: AROS ELECTRONICS ABInventors: Jerker Hellstroem, Oskar Josefsson, Daniel Chadstrom
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Publication number: 20190253019Abstract: A multiphase electric motor system and a method for controlling a multiphase electric motor system are disclosed. The method for controlling the multiphase electric motor system includes modulating a plurality of carrier signals with a plurality of modulation signals in order to generate a multiphase motor supply signal having a modulated phase signal for each phase of the electric motor. A set of time windows is defined in each period of the multiphase motor supply signal, where an individually selected group of modulated phase signals is modified by delaying the associated carrier signal in each time window, thereby generating a shifted multiphase motor supply signal and providing an efficient DC bus ripple reduction. Hereby, it is e.g. possible to use small filter capacitors/capacitor banks in electrical motor systems. An analogous multiphase electric generator system and method for controlling a multiphase electric generator system are disclosed.Type: ApplicationFiled: November 10, 2017Publication date: August 15, 2019Inventors: Jerker Hellstroem, Oskar Josefsson, Daniel Chadstrom
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Patent number: 10348233Abstract: An electrical motor system and a method for operating the electrical motor system are disclosed. The electrical motor system comprises a direct current (DC) source, a filter connected in parallel with the DC source and an electric motor with at least two sets of windings. A voltage signal is provided from the DC source to the inverter circuit where the signal is modulated. The modulated signal is then supplied from the inverter circuit to each set of windings with a respective time offset between each set of windings respectively, providing a very efficient DC bus ripple reduction. Hereby, it is e.g. possible to use small filter capacitors/capacitor banks in electrical motor systems.Type: GrantFiled: May 25, 2016Date of Patent: July 9, 2019Assignee: AROS ELECTRONICS ABInventor: Jerker Hellström
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Patent number: 10341026Abstract: An optical bus system (1) having a start-up state and at least one operating state is disclosed. The optical bus system (1) includes a mechanical support structure (21) arranged to receive and hold a master module (2) having a downstream optical interface (3) and a set of slave modules (6) each having an upstream optical interface (7) and a downstream optical interface (8). The modules are attached to the mechanical support structure (21) such that optical interfaces of adjacent modules are aligned and in close proximity to each other in order to enable optical communication (24, 25) between adjacent modules. Each slave module (6) is further provided with circuitry to form one or two shunting signal paths (30, 31) depending on operating state after an addressing procedure is completed in the start-up state. Hereby, it is e.g. possible to realize a robust and cost-efficient optical bus system with high bandwidth capability.Type: GrantFiled: March 27, 2017Date of Patent: July 2, 2019Assignee: AROS ELECTRONICS ABInventors: Jerker Hellström, Per Lundberg, Magnus Wide
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Publication number: 20190123828Abstract: An optical bus system (1) having a start-up state and at least one operating state is disclosed. The optical bus system (1) includes a mechanical support structure (21) arranged to receive and hold a master module (2) having a downstream optical interface (3) and a set of slave modules (6) each having an upstream optical interface (7) and a downstream optical interface (8). The modules are attached to the mechanical support structure (21) such that optical interfaces of adjacent modules are aligned and in close proximity to each other in order to enable optical communication (24, 25) between adjacent modules. Each slave module (6) is further provided with circuitry to form one or two shunting signal paths (30, 31) depending on operating state after an addressing procedure is completed in the start-up state. Hereby, it is e.g. possible to realize a robust and cost-efficient optical bus system with high bandwidth capability.Type: ApplicationFiled: March 27, 2017Publication date: April 25, 2019Inventors: Jerker HELLSTRÖM, Per LUNDBERG, Magnus WIDE
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Publication number: 20180175770Abstract: An electrical motor system and a method for operating the electrical motor system are disclosed. The electrical motor system comprises a direct current (DC) source, a filter connected in parallel with the DC source and an electric motor with at least two sets of windings. A voltage signal is provided from the DC source to the inverter circuit where the signal is modulated. The modulated signal is then supplied from the inverter circuit to each set of windings with a respective time offset between each set of windings respectively, providing a very efficient DC bus ripple reduction. Hereby, it is e.g. possible to use small filter capacitors/capacitor banks in electrical motor systems.Type: ApplicationFiled: May 25, 2016Publication date: June 21, 2018Inventor: JERKER HELLSTRÖM
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Patent number: 8924017Abstract: An embodiment of the present invention discloses an apparatus for recyclable absorption of electric retardation energy from a multiple axis industrial robotics system, including a robot control unit and at least one drive unit, which generates the electrical retardation energy at retardation. By an apparatus according to the present invention, the electric retardation energy, which occurs when a drive unit is retarded and is transferred into generator mode, may be recycled by the brake unit of the apparatus, which accelerates a mechanical device connected to the brake unit. The electric retardation energy is thus transferred into kinetic energy that may be stored in mechanical devices. An embodiment of the present invention also refers to a corresponding method for recyclable absorption of electric retardation energy from a multiple axis industrial robotics system.Type: GrantFiled: May 19, 2006Date of Patent: December 30, 2014Assignee: Aros Electronics ABInventors: Jerker Hellström, Magnus Wide
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Patent number: 7110846Abstract: The invention relates to a yarn processing system comprising a textile machine and at least one yarn feeding device, which are assigned to the peripheral auxiliary devices wherein the yarn feeding device has a computerised control device that is connected by signal transmission to the auxiliary device. At least certain auxiliary devices have at least one component configured in such a way that they generate and/or receive signals. The yarn feeding device has at least one local, autonomous communication bus system for the transmission of serial data at least from and/or to the auxiliary devices, said bus system being connected to the control device.Type: GrantFiled: June 27, 2002Date of Patent: September 19, 2006Assignee: Iropa AGInventors: Jerker Hellstroem, Lars Helge Gottfrid Tholander, Niklas Wahlgren
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Publication number: 20040238060Abstract: The invention relates to a yarn processing system (S) comprising a textile machine and at least one yarn feeding device, which are assigned to the peripheral auxiliary devices (3 to 6, 18), wherein the yarn feeding device has a computerised control device (C) that is connected by signal transmission to the auxiliary device. At least certain auxiliary devices have at least one component configured in such a way that they generate and/or receive signals. According to the invention, the yarn feeding device (F, F′) has at least one local, autonomous communication bus system (BL) for the transmission of serial data at least from and/or to the auxiliary devices, said bus system being connected to the control device (C).Type: ApplicationFiled: June 28, 2004Publication date: December 2, 2004Inventors: Jerker Hellstroem, Lars Helge Gottfrid Tholander, Niklas Wahlgren
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Patent number: 6815915Abstract: A device for supplying energy by means of a first DC voltage source e.g. in the form of a DC voltage bus, a drive system comprising several electric motors is connected to said DC voltage bus. The electric motors are comprised e.g. in a number of yarn feeding devices co-acting with a weft insertion system in a shuttleless weaving machine for producing a woven fabric having a multi-colour pattern. The electric motors operate with energy consumption function phases (start and acceleration) and with energy generating function phases (deceleration or braking). The first DC voltage source is associated with at least one second DC voltage source via a variable voltage converter.Type: GrantFiled: August 18, 2003Date of Patent: November 9, 2004Assignee: Aros Electronics ABInventor: Jerker Hellstroem
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Publication number: 20040095087Abstract: A device for supplying energy by means of a first DC voltage source e.g. in the form of a DC voltage bus, a drive system comprising several electric motors is connected to said DC voltage bus. The electric motors are comprised e.g. in a number of yarn feeding devices co-acting with a weft insertion system in a shuttleless weaving machine for producing a woven fabric having a multi-colour pattern. The electric motors operate with energy consumption function phases (start and acceleration) and with energy generating function phases (deceleration or braking). The first DC voltage source is associated with at least one second DC voltage source via a variable voltage converter.Type: ApplicationFiled: August 18, 2003Publication date: May 20, 2004Inventor: Jerker Hellstroem
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Patent number: 6513554Abstract: A yarn processing system includes a yarn consuming textile machine and at least one yard feeding device, each having electric drive means and electronic control and/or monitoring means. The yarn processing system includes data transmission paths for mutual transmissions between the control and/or monitoring means wherein each of the control and/or monitoring means contains one communication microprocessor for serial or serial and digital transmission of data representing information types in the form of a communication protocol. The information types differ in ranking with real-time transmission priority of at least the information type of the highest ranking.Type: GrantFiled: April 11, 2002Date of Patent: February 4, 2003Assignee: Iropa AGInventors: Jerker Hellström, Tomas Rundberg, Lars Helge Gottfrid Tholander
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Patent number: 6095200Abstract: An opto-electronic device (S) for detecting the movement of yarn (Y) (10) passing transversely through a detection zone (11) on the storage drum (3) of a yarn feeder (F), has at least one light source (L) directed on the detection zone (11), at least one reflector (B) fitted on the storage drum (3) a short distance away on the side of the detection zone (11) away from the light source (L) and at least one signal-generating receiver (R) directed towards the detection zone. The opto-electronic device also has a reflector which includes (B) at least one narrow and approximately flat reflection area (15, 15', 15") extending essentially parallel to the longitudinal direction of the yarn and in the circumferential direction of the storage drum (3). The reflection area is bounded at its longitudinal sides by either a strip diaphragm fitted between the reflector (B) and the yarn passage plane (13), or diaphragmed regions (17) arranged approximately in the reflector plane.Type: GrantFiled: December 17, 1998Date of Patent: August 1, 2000Assignee: IRO ABInventor: Jerker Hellstroem
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Patent number: 5983955Abstract: A feeding device for a yarn includes a storage drum to which yarn is fed tangentially by means of a winding drive. The yarn is stored in windings on the storage drum in a yarn reserve and can be withdrawn therefrom overhead. The feeding device also includes at least one optoelectronic yarn sensing device which is arranged in a stationary manner outside the storage drum and includes a light source arrangement, a signal-generating receiver arrangement and a light guide. The light source arrangement includes a light outlet which is oriented towards the storage drum, and the receiver arrangement is oriented towards a sensing region on the storage drum. The light guide includes an inlet which is directed outwardly towards the light outlet, and an outlet which is directed outwardly towards the receiver arrangement wherein the inlet and the outlet of the light guide are arranged in positions on the storage drum which are at least axially-spaced apart.Type: GrantFiled: September 15, 1997Date of Patent: November 16, 1999Assignee: Iro AbInventor: Jerker Hellstroem
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Patent number: 4617971Abstract: The present invention relates to a loom control system operable to stop a loom in the presence of a yarn breakage. This loom comprises a feeding device having a yarn storage drum for temporarily storing the yarn and a yarn store sensor for sensing the quantity of yarn stored on the drum of the feeding device and for transmitting an electric sensor signal representing the quantity of yarn stored on the drum to the feeding device to control the operation of the feeding device and to thereby control the quantity of yarn stored on the drum. A monitor circuit is electrically connected to the yarn store sensor for receiving the sensor signal, wherein the monitor circuit derives information on yarn breakage before and/or after the feeding device from the sensor signal or its variation with respect to time to generate a stop signal for the loom.Type: GrantFiled: January 10, 1984Date of Patent: October 21, 1986Assignees: Aktiebolaget IRO, Aros Electronics ABInventor: Jerker Hellstroem