Abstract

A bipolar induction electric machine is provided comprising a stator arrangement comprising a plurality of circumferentially arranged stator modules, each stator module comprising a plurality of axially arranged spaced apart stator pole elements fitted with a concentrated armature winding and terminating in an inwardly facing, curved stator pole surface; and a rotor arrangement rotatably and concentrically accommodated within the stator arrangement, the rotor arrangement comprising a plurality of axially arranged rotor modules, each rotor module comprising at least one circumferentially arranged, curved bi-polar member comprising a pair of curved rotor pole elements that are axially displaced on either side of a stationary concentric field exciter coil accommodated within the stator arrangement. The curved rotor pole elements are concentrically arranged relative to the stator pole surfaces so as to define a uniform air-gap therebetween and thus provide a plurality of axially segmented multipolar flux circuits.

IPC Classes  ?

• H02K 19/28 - Synchronous generators characterised by the arrangement of exciting windings for self-excitation
• H02K 11/225 - Detecting coils
• H02K 19/12 - Synchronous motors for multi-phase current characterised by the arrangement of exciting windings, e.g. for self-excitation, compounding or pole-changing

Abstract

A bipolar induction electric machine is provided comprising a stator arrangement comprising a plurality of circumferentially arranged stator modules, each stator module comprising a plurality of axially arranged spaced apart stator pole elements fitted with a concentrated armature winding and terminating in an inwardly facing, curved stator pole surface; and a rotor arrangement rotatably and concentrically accommodated within the stator arrangement, the rotor arrangement comprising a plurality of axially arranged rotor modules, each rotor module comprising at least one circumferentially arranged, curved bi-polar member comprising a pair of curved rotor pole elements that are axially displaced on either side of a stationary concentric field exciter coil accommodated within the stator arrangement. The curved rotor pole elements are concentrically arranged relative to the stator pole surfaces so as to define a uniform air-gap therebetween and thus provide a plurality of axially segmented multipolar flux circuits.

IPC Classes  ?

• H02K 21/16 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
• H02K 21/20 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having windings each turn of which co-operates only with poles of one polarity, e.g. homopolar machine
• H02K 21/24 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
• H02K 23/42 - DC commutator motors or generators having mechanical commutatorUniversal AC/DC commutator motors characterised by the arrangement of the magnet circuits having split poles, i.e. zones for varying reluctance by gaps in poles or by poles with different spacing of the air gap
• H02K 23/44 - DC commutator motors or generators having mechanical commutatorUniversal AC/DC commutator motors characterised by the arrangement of the magnet circuits having movable, e.g. turnable, iron parts