US 6,700,272 B1Granted

Reluctance motor with gearless step-down without electronic control of rotating field

AssigneeEMF 97 Elektro-Maschinen-Vertrieb-Magnettechnik-und Forschungs-GmbH

InventorJuergen Lindner

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Abstract

A reluctance motor with a stator (1) which has a three-phase current stator winding for generating a rotary magnetic field and a rotor (3) which is located on the shaft (2) and which is made primarily of a ferromagnetic material. The rotor is formed of a predetermined number of angular regions of the same peripheral angle which adjoin one another in a circumferential direction and preferably have at least one pair of flux guidance regions (10, 11) facing the stator (1), with flux guidance properties which differ in the main direction of the rotary field. According to a first feature, the stator (1) has a preset number of angular regions of the same peripheral angle which adjoin one another in the circumferential direction, preferably having at least one pair of flux guidance regions (13, 14) facing the rotor (3) with flux guidance properties which differ in the main direction of the rotary field, and the number of angular regions (12) on the stator (1) differ from the number of angular regions (9) on the rotor (3) by an integral multiple of the pole number, preferably the simple pole number, of the three-phase current stator winding. Alternatively or together with the first feature, according to a second feature, the flux guidance regions (10, 11) and connecting elements for connection to shaft (2) of the reluctance motor (3) enclose a flux guidance rotor (27) which floats on shaft (2) via bearings and which is made of ferromagnetic material for returning of the lines of force of the rotary field.

Claims28

Dependent claims

Reluctance motor with a stator comprising a three-phase current stator winding with a number of poles for generating a rotary magnetic field without electronic switching and with a number of slots per pole and phase that is greater than 1, coils being assigned to each of the three phases with the coils being distributed in the slots of the stator and a rotor which is located on a shaft and is made primarily of a ferromagnetic material, the rotor having a predetermined number of angular regions of a like peripheral angular extent which adjoin one another in a circumferential direction of the rotor;

wherein slots receiving the three-phase current stator windings are partially closed by circumferentially extending portions of the stator itself;
wherein the stator has a preset number of angular regions of the same peripheral angular extent which adjoin one another in a circumferential direction of the stator;
wherein each of the predetermined number of angular regions of the rotor has at least one pair of flux guidance regions facing the stator, the flux guidance regions having flux guidance properties which differ in a main direction of the rotary magnetic field;
wherein each of the preset number of angular regions of the stator has at least one pair of flux guidance regions facing the rotor which have flux guidance properties which differ in the main direction of the rotary magnetic field;
wherein the flux guidance regions with low magnetic resistance of the stator are located radially inwardly of the partially closed slots;
and wherein the preset number of angular regions on the stator differs from the predetermined number of angular regions on the rotor by an integral multiple of the number of poles of the three-phase current stator winding.

3 more elements

Reluctance motor with a stator comprising a three-phase current stator winding with a number of poles for generating a rotary magnetic field and a rotor which is located on a shaft and is made primarily of a ferromagnetic material, the rotor having a predetermined number of angular regions of a like peripheral angular extent which adjoin one another in a circumferential direction of the rotor;

wherein the stator has a preset number of angular regions of the same peripheral angular extent which adjoin one another in a circumferential direction of the stator, wherein each of the predetermined number of angular regions of the rotor has at least one pair of flux guidance regions facing the stator, the flux guidance regions having flux guidance properties which differ in a main direction of the rotary magnetic field;
wherein each of the preset number of angular regions of the stator has at least one pair of flux guidance regions facing the rotor which have flux guidance properties which differ in the main direction of the rotary magnetic field, wherein the preset number of angular regions on the stator differs from the predetermined number of angular regions on the rotor by an integral multiple of the number of poles of the three-phase current stator winding wherein a reduction rotor is provided floating on the shaft between the stator and rotor, wherein the reduction rotor has a predetermined number of angular regions of the same peripheral angle which adjoin one another in the circumferential direction on a surface facing the stator and each of which have a pair of flux guidance regions with flux guidance properties which differ in the main direction of the rotary field;
and wherein the reduction rotor, on a surface facing the rotor, has a preset number of angular regions of the same angular extent which adjoin one another in the circumferential direction and each of which has a pair of flux guidance regions with flux guidance properties which differ in the main direction of the rotary field;
and wherein the number of angular regions on the stator differs from the number of angular regions on the surface of the reduction rotor facing the stator to the same extent that the number of angular regions on the surface of the reduction rotor facing the rotor differs from the number of angular regions on the rotor and is equal to an integral multiple of the pole number of the three-phase current stator winding.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 09/613,627Filed 11 Jul 2000 · continuation
Priority: DE 197 43 38030 Sep 1997
Granted: 2 Mar 2004
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

H02K 21/44
With rotating flux distributors, and armatures and magnets both stationary: with armature windings wound upon the magnets
H02K 1/12
Characterised by the shape, form or construction: stationary parts of the magnetic circuit
H02K 7/11
Structural association with clutches, brakes, gears, pulleys or mechanical starters: with dynamo-electric clutches
H02K 16/00
Machines with more than one rotor or stator