Robert Boschgmbh

Black Decker Inc.

British Technology Group Limited

Switched Reluctance Drives Limited

Cummins Generator Technologies Limited

Barrie Charles Mecrow

Alan Galloway Jack

Phillip George Dickinson

Steven Swaddle

Steven-Andrew Evans

An electrical machine is described, having a stationary main element as stator and a rotating main element as rotor, of which one main element having a magnetic yoke and poles, of a predefined number of poles, projecting radially from the former, is made of SMC material and carries a pole winding on each pole. To achieve cost-effective manufacturing of the main element, the main element is assembled from at least two modules that are axially adjacent, rigidly connected to one another, and produced from SMC material, each module having a yoke part, closed in on itself, of the magnetic yoke having an equal number of divisions of poles attached thereto in one piece, which corresponds to a fraction of the number of poles determined by the number of modules.

Electrical machine

A stator () for an electrical machine. A core of the stator () is made up of a series of connected segments (), that are rotatable relative to one another during an assembly operation. Each segment () includes a radially outermost base portion () from which a respective integral pole piece () projects substantially inwardly to a pole piece tip. The tip includes a surface () that is arcuate and concentric with an axis of rotation of the machine. Each pole piece () projects in a non-radial direction and such that a semi-closed slot () arranged to locate part of a least one coil () therein is provided between each pair of juxtaposed pole pieces (). A coil () is fittable to a respective one of the pole pieces () during the assembly operation without deformation of the pole piece ().

Stator for an electrical machine

A switched reluctance machine has a stator which has an array of alternate wide and narrow poles around its inner circumference. Coils are wound around the wide poles only. The rotor includes segments of soft magnetic material carried on a non-magnetic core. The segments are so proportioned at the air gap that the flux produced by one stator coil passes through two or more segments and returns through the adjacent narrow poles. The machine is capable of producing a high output.

Control of a switched reluctance drive

A power tool comprising a body ( ), a motor and a roller ( ), characterized in that the motor acts as the roller ( ).

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Whitley Bay, United Kingdom

Barrie Charles Mecrow