Abstract: An alternator system includes an alternator with a stator having at least one stationary winding and a rotor with a rotatable field coil for producing alternating current, a main voltage regulator having a main controller and a main power switch configured to control the current through the field coil, a redundant voltage regulator having a redundant controller and a redundant power switch configured to control the current through the field coil. The main power switch, the field coil and the redundant power switch are connected in series, in that order. A power supply for an electrical system includes a battery and the alternator system. A vehicle includes the power supply.

Abstract: The invention relates hot work tool steel. The steel comprises the following main components (in wt. %): C 0.27-0.38 Si 0.10-0.35 Mn 0.2-0.7 Cr 4.5-5.5 Mo 2.05-2.90 V 0.4-0.6 N 0.01-0.12 H ?0.0004 S ?0.0015 balance optional elements, iron and impurities.

Abstract: An alternator system includes an alternator with a stator having at least one stationary winding and a rotor with a rotatable field coil for producing alternating current, a main voltage regulator having a main controller and a main power switch configured to control the current through the field coil, a redundant voltage regulator having a redundant controller and a redundant power switch configured to control the current through the field coil. The main power switch, the field coil and the redundant power switch are connected in series, in that order. A power supply for an electrical system includes a battery and the alternator system. A vehicle includes the power supply.

Abstract: The invention relates hot work tool steel. The steel comprises the following main components (in wt. %): C 0.27-0.38 Si 0.10-0.35 Mn 0.2-0.7 Cr 4.5-5.5 Mo 2.05-2.90 V 0.4-0.6 N 0.01-0.12 H ?0.0004 S ?0.0015 balance optional elements, iron and impurities.

Abstract: The invention relates to a catalyst regeneration process for a tar reforming catalyst within a catalyst bed in a tar reformer. The process comprises the steps of:—Admitting a main gas stream with controlled temperature and oxygen content to an inlet into the tar reformer;—Passing the main gas stream through the catalyst bed to form an oxygen depleted gas stream;—Exiting the oxygen depleted gas stream from the tar reformer; and—Recycling at least a part of the oxygen depleted gas stream exiting from the tar reformer back into said main gas stream upstream said tar reformer. The temperature of said main gas stream at the inlet is controlled to be within the range from about 500° C. to about 1000° C.

Abstract: The invention relates to a catalyst regeneration process for a tar reforming catalyst within a catalyst bed in a tar reformer. The process comprises the steps of:—Admitting a main gas stream with controlled temperature and oxygen content to an inlet into the tar reformer;—Passing the main gas stream through the catalyst bed to form an oxygen depleted gas stream;—Exiting the oxygen depleted gas stream from the tar reformer; and—Recycling at least a part of the oxygen depleted gas stream exiting from the tar reformer back into said main gas stream upstream said tar reformer. The temperature of said main gas stream at the inlet is controlled to be within the range from about 500° C. to about 1000° C.

Abstract: A roll and a roll spring, where spring is in the form of a ring-shaped body manufactured of an elastic material having two axially spaced-apart ends. In a front end of the spring body, at least one first slot opens which extends towards the rear end, without reaching the same, and which separates two forward-facing laminae. In the rear end, at least one second slot opens which extends towards the front end without reaching the same, and which separates two rearward-facing laminae. At each one of the two ends of the spring body, an end surface of a lamina is axially displaced in relation to the end surface of an adjacent lamina. When the spring is clamped between two rings of a roll shaft included in the roll, the protruding end surfaces are subjected to compressive forces that generate a labyrinth-shaped train of spring forces between the end surfaces.

Abstract: A roll and a roll spring, where spring is in the form of a ring-shaped body manufactured of an elastic material having two axially spaced-apart ends. In a front end of the spring body, at least one first slot opens which extends towards the rear end, without reaching the same, and which separates two forward-facing laminae. In the rear end, at least one second slot opens which extends towards the front end without reaching the same, and which separates two rearward-facing laminae. At each one of the two ends of the spring body, an end surface of a lamina is axially displaced in relation to the end surface of an adjacent lamina. When the spring is clamped between two rings of a roll shaft included in the roll, the protruding end surfaces are subjected to compressive forces that generate a labyrinth-shaped train of spring forces between the end surfaces.