Aros Electronics Ab

Jerker Hellström

Magnus Wide

Oskar Josefsson

Per Lundberg

Daniel CHÄDSTRÖM

An assembly () for dissipating heat generated by a heat generating electrical component () which is surface mounted on a circuit board () in a surface mounting process. The assembly comprises a heat buffer () made of a thermally and electrically conducing material, and being surface mounted on the circuit board () so as to be soldered to a thermal flag () of the heat generating electrical component (). The assembly further comprises a heat sink () in thermal contact with the heat buffer, and a galvanic separation () 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.

Surface mounted heat buffer

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.

DC bus ripple reduction

An optical bus system () having a start-up state and at least one operating state is disclosed. The optical bus system () includes a mechanical support structure () arranged to receive and hold a master module () having a downstream optical interface () and a set of slave modules () each having an upstream optical interface () and a downstream optical interface (). The modules are attached to the mechanical support structure () such that optical interfaces of adjacent modules are aligned and in close proximity to each other in order to enable optical communication () between adjacent modules. Each slave module () is further provided with circuitry to form one or two shunting signal paths () 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.

Optical bus

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.

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Mölndal, Sweden

Jerker Hellström