Electric Motor II

Abstract

An electric motor conveys media and includes a stator, a rotor with a rotor magnet, and a media throughput opening between the stator and rotor. An operationally reliable delivery of media at low cost and with low maintenance is achieved with the electric motor.

1 - 32 . (canceled) 
     
     
         33 . An electric motor for delivering media, comprising:
 a stator;   a rotor including a rotor magnet; and   a media passage opening located between the stator and the rotor,   wherein, in at least one cross section of the electric motor, a ratio of a first cross-sectional area of an inlet opening to a second cross-sectional area of the rotor magnet is between 0.5 and 100.   
     
     
         34 . A motor according to  claim 33 , wherein the ratio is between 0.8 and 50. 
     
     
         35 . A motor according to  claim 33 , wherein the ratio is between 2 and 20. 
     
     
         36 . A motor according to  claim 33 , wherein the rotor magnet has a remanence between 0.3 Teslas and 0.8 Teslas. 
     
     
         37 . A motor according to  claim 33 , wherein the rotor magnet has a remanence larger than 0.8 Teslas. 
     
     
         38 . A motor according to  claim 33 , wherein the rotor magnet has a remanence larger than 1.2 Teslas. 
     
     
         39 . A motor according to  claim 33 , wherein a flux density in the media passage opening is between 0.05 Teslas and 0.5 Teslas. 
     
     
         40 . A motor according to  claim 33 , wherein a flux density in the media passage opening is more than 0.5 Teslas. 
     
     
         41 . A motor according to  claim 33 , wherein the rotor magnet is of one piece. 
     
     
         42 . A motor according to  claim 33 , wherein the rotor magnet has is a substantially cylindrical shape. 
     
     
         43 . A motor according to  claim 33 , wherein the rotor magnet is a solid cylinder. 
     
     
         44 . A motor according to  claim 33 , wherein the rotor magnet has a central bore for fastening. 
     
     
         45 . A motor according to  claim 33 , wherein a smallest diameter of the stator is 8.01- to 15-times as large as a largest outer diameter of the rotor. 
     
     
         46 . A motor according to  claim 33 , wherein a smallest diameter of the stator is 8.01- to 12-times as large as a largest outer diameter of the rotor. 
     
     
         47 . A motor according to  claim 33 , wherein a smallest inner diameter of the stator is 1.1- to 1.49-times as large as a largest outer diameter of the rotor. 
     
     
         48 . A motor according to  claim 33 , wherein a smallest inner diameter of the stator is 1.25- to 1.49-times as large as a largest outer diameter of the rotor. 
     
     
         49 . A motor according to  claim 33 , wherein, in at least one cross section, the ratio is between 2 and 100. 
     
     
         50 . A motor according to  claim 33 , wherein, in at least one cross section, the ratio is between 10 and 50. 
     
     
         51 . A motor according to  claim 33 , wherein the at least one cross section runs through one of magnetically effective sections and electrically effective sections of the stator. 
     
     
         52 . A motor according to  claim 33 , wherein the at least one cross section lies perpendicular to an axis of the rotor. 
     
     
         53 . A motor according to  claim 33 , wherein a smallest inner diameter of the stator is between 1.5- and 8-times as large as a largest outer diameter of the rotor magnet. 
     
     
         54 . A motor according to  claim 33 , wherein the motor is a permanent magnet synchronous motor. 
     
     
         55 . A motor according to  claim 33 , wherein the rotor magnet has at least one of a remanence greater than 0.8 Teslas and a high energy density greater than 100 kJ/m3. 
     
     
         56 . A motor according to  claim 33 , wherein the rotor magnet consists of rare earth materials. 
     
     
         57 . A motor according to  claim 33 , wherein the rotor magnet consists of one of NdFeB and SmCo. 
     
     
         58 . A motor according to  claim 33 , wherein the rotor magnet is surrounded by a sheathing. 
     
     
         59 . A motor according to  claim 59 , wherein the sheathing has a substantially cylindrical shape. 
     
     
         60 . A motor according to  claim 33 , wherein the stator is a part of an inner wall of a surrounding housing. 
     
     
         61 . A motor according to  claim 33 , wherein the stator, as an insert, is applied into a corresponding opening of a surrounding housing. 
     
     
         62 . A motor according to  claim 33 , wherein the media passage opening is free of struts between the rotor and the stator. 
     
     
         63 . A motor according to  claim 33 , wherein the stator has a substantially hollow-cylindrical shape. 
     
     
         64 . A motor according to  claim 33 , wherein the rotor magnet is prepared for integration into a shaft and onto a common shaft with one of a media impeller and a media conveyor worm. 
     
     
         65 . A motor according to  claim 33 , wherein the rotor magnet is one of partially integrated and substantially completely integrated into one of a media impeller and a media conveyor worm. 
     
     
         66 . A motor according to  claim 33 , wherein one of the media impeller and the media conveyor worm is composed of a material which is one of a magnetically non-conductive material and a substantially a magnetically non-conductive material. 
     
     
         67 . A motor according to  claim 33 , wherein one of the media impeller and the media conveyor worm is composed of a material which includes one of a reinforced plastic and a non-reinforced plastic. 
     
     
         68 . A motor according to  claim 33 , wherein the stator includes with a shielding towards the inside. 
     
     
         69 . A motor according to  claim 68 , wherein the shielding has the form of one of a tube and a flexible tubing. 
     
     
         70 . A motor according to  claim 68 , wherein the shielding is composed of an electrically non-conductive material and a magnetically non-conductive material. 
     
     
         71 . A motor according to  claim 33 , wherein the rotor comprises a rotor shaft, the rotor shaft being mounted in one of a simple manner and a multiple manner over its length. 
     
     
         72 . A motor according to  claim 40 , wherein the rotor shaft is substantially mounted on a first side and substantially freely projects on a second side. 
     
     
         73 . A motor according to  claim 33 , wherein at least one of the rotor and the rotor magnet is integrated into a shaft to be driven by the motor. 
     
     
         74 . A motor according to  claim 33 , wherein the rotor shaft is mounted one of a non-lubricated manner and a lubricated manner by a delivery medium. 
     
     
         75 . A motor according to  claim 33 , wherein an axial centre of the stator and an axial centre of the rotor are displaced in an axial direction. 
     
     
         76 . A motor according to  claim 33 , wherein an axial centre of the stator and an axial centre of the rotor are displaced in an axial direction between 0.1 and 0.2 of a largest axial extension of the rotor magnet. 
     
     
         77 . The use of an electric motor which includes a stator; a rotor including a rotor magnet; and a media passage opening located between the stator and the rotor, wherein, in at least one cross section of the electric motor, a ratio of a first cross-sectional area of an inlet opening to a second cross-sectional area of the rotor magnet is between 0.5 and 100, and wherein the motor being used in an electrically aided turbocharger with a freely projecting electric rotor, for a transport of explosive gases, dusts, vapours, sticking substances, pastes, liquids such as water or oil; decomposing products, such as foodstuffs; in ventilation devices, in pumps, in particular in pumps for aggressive media, such as salt water, chemical solutions (in particular in the orthodontic field); in disinfectable or sterilisable pumps, canned pumps (medium transport in the axial direction), metering pumps, micro-pumps, disposable pumps, multi-stage pump systems; for use in turbines, generators, conveyor worms for example for granular media, fluids or pastes; in gas-, water- and steam turbines; in devices for measuring the media flow via a generator voltage.