Abb Schweiz Ag

Minos Beniakar

Jan Svensson

Theodore Soong

Kalle Ilves

Luca Peretti

Panagiotis Kakosimos

NIck Elliott

A double-stator PM machine having: an outer stator generating an outer electromagnetic field dependent on an outer three-phase supply current; an inner stator generating an inner electromagnetic field dependent on an inner three-phase supply current; a PM rotor rotated by the outer and inner electromagnetic fields between the outer and inner stators; and a control arrangement controlling the outer and inner supply currents. There is an electrical connection between neutral points of the outer and inner stators. The control arrangement is configured for controlling the outer and inner supply currents such that there is a relative angle shift of 30&#xb0; between the outer and inner supply currents and such that a third order current harmonic component is circulated between the outer and inner stators.

Double-stator PM machine with 3rd order current harmonic injection

A tubular linear switched reluctance machine includes a segmented translator having a non-magnetic material body and ring segments of magnetic material axially separated from each other and provided on the body. The ring segments are distributed along the axial direction of the body. The machine also includes a stator arranged to electromagnetically interact with the segmented translator, wherein the stator has a plurality of coaxially arranged annular modules, and a respective annular non-magnetic spacer arranged between each pair of subsequently arranged modules.

Modular tubular linear switched reluctance machine

A protection arrangement for a multiphase uninterruptible power supply system including a vacuum circuit breaker connected in series with an inductive element, where the inductive element includes, for every phase, two series-connected magnetically coupled windings separated by a tap point. The protection arrangement includes one first group of protective components per phase, each first group including a first protective component having a first end connected to a link between the vacuum circuit breaker and the inductive element and a second end connected to a corresponding tap point, where at least one protective component in each first group is a surge arrester.

Protection of an inductive element

A protection arrangement for an uninterruptible power supply system including at least one vacuum circuit breaker connected in series with an inductive element, the protection arrangement including a first bypass branch and a first grounding branch, the first bypass branch being connected in parallel with the inductive element and including two series-connected protective components of a first type and a bypass branch midpoint between them, where the first grounding branch is connected between the bypass branch midpoint and ground and includes a first grounding surge arrester.

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Västerås, Sweden

Minos Beniakar