Compressor and driving motor assembly

Abstract

In a compressor and driving motor assembly, the driving motor is a hybrid permanent magnet motor and/or has a rotor mounted directly on the drive shaft of the compressor, the drive shaft acting as a cantilever supporting the rotor.

We claim:  
     
         1 . A compressor and driving motor assembly, in which the motor comprises a rotor and a stator assembly, and the compressor comprises a main body which supports a drive shaft, the rotor being mounted directly on the drive shaft, in which the drive shaft acts as a cantilever supporting the rotor.  
     
     
         2 . An assembly according to  claim 1  without a bearing acting to support the rotor at a distance from the main body of the compressor.  
     
     
         3 . An assembly according to  claim 1 , in which the motor is a hybrid permanent magnet motor.  
     
     
         4 . An assembly according to  claim 1 , in which the rotor is shaped so as to have a central longitudinal aperture adapted to fit to a corresponding tapered portion of the drive shaft.  
     
     
         5 . An assembly according to  claim 1 , in which the compressor has a housing, and the stator assembly is connected to the housing of the compressor.  
     
     
         6 . An assembly according to  claim 5 , in which the stator assembly is directly connected to the housing.  
     
     
         7 . An assembly according to  claim 5 , in which the stator assembly is connected to the housing by way of an adapter flange.  
     
     
         8 . An assembly according to  claim 5 , in which the compressor is an air compressor.  
     
     
         9 . An assembly according to  claim 5 , in which the compressor is a rotary screw compressor.  
     
     
         10 . A rotary screw air compressor and driving motor assembly, the driving motor being a hybrid permanent magnet motor.  
     
     
         11 . An assembly according to  claim 10 , in which the compressor is an air compressor.  
     
     
         12 . An assembly according to  claim 10 , in which the compressor is a rotary screw compressor.  
     
     
         13 . An assembly according to  claim 10 , in which the motor is a fixed speed motor.  
     
     
         14 . An assembly according to  claim 10 , in which the motor is a variable speed motor.  
     
     
         15 . An assembly according to  claim 10 , in which the compressor is of flooded type.  
     
     
         16 . An assembly according to  claim 10 , in which the compressor is of oil-free type.  
     
     
         17 . An assembly according to  claim 10 , in which the motor comprises a rotor which is mounted directly on to a drive shaft of the compressor.