| Utilizing water as a refrigerant in an air conditioning device is a complex problem that requires various innovative ideas in order to create a suitable compressor that can successfully obtain the extremely high compression ratios required. This compressor requires multiple stages of impellers, which in order to withstand the high forces must be a wound composite created on a winding machine.; The largest challenge is getting the impellers to spin at the extremely high speed necessary. It is proposed using an innovative design in which the entire impeller acts as the shaft of a permanent magnet brushless motor. By placing magnets around the circumference of the shroud, or integrating them in the shroud itself, the entire impeller can act as one large shaft in the center of a motor device.; This thesis aims to look at the background research required to create the motor for such a device. Included are discussions on basic refrigeration cycles, information regarding the composite impeller, an overview of magnetics, as well as a numerous equations, and data regarding overall permanent magnet motor design.; All of these data are subsequently integrated together in order to propose numerous designs for a motor solution. These designs are accompanied by graphs and charts to outline various trends present using multiple design parameters. The data are then used with a weighted design matrix in order to select a preliminary design solution. |
