Coreless rotating electrical machine with stator including cylindrical coil and cooling method therefor

Cooling method for a coreless rotating electrical machine comprising:

• a stator in which a driveshaft is rotatably coupled to a center part of a lid-type mount which fixes one of end faces of an energizeable coreless cylindrical coil cylindrically formed using a laminate structure consisting of a few overlapping conductive metal sheets, in such a manner that each sheet is covered by insulating layer, with a plurality of line parts being spaced in longitudinal direction;
• a rotor which is constructed such that another end face of the cylindrical coil is closed leaving a clearance with respect to a cup-type mount opposingly positioned with respect to the lid-type mount, and that the cylindrical coil is arranged in a first air space which forms an air gap between an inner cylindrical air-channel forming body and an outer cylindrical air-channel forming body which are integrated with the cup-type mount, and further that the driveshaft penetrating through a center part of the lid-type mount is coupled to a center part of the cup-type mount and magnets are equipped on an inner surface of the outer cylindrical air-channel forming body and/or an outer surface of the inner cylindrical air-channel forming body in the first air space;
• and;
• a second air space positioned on inner surface side of the cylindrical coil and a third air space positioned on outer surface side of the cylindrical coil formed between ones of end faces of the inner cylindrical air-channel forming body and the outer cylindrical air-channel forming body and the lid-type mount,
• wherein, the cooling method comprising steps of:
• operating the rotor by energizing the cylindrical coil;
• feeding or intaking cooling medium or cooling air into the second air space;
• directly cooling both surfaces of the cylindrical coil with the cooling medium or cooling air;
• and
• discharging the cooling medium or cooling air after flowing through the first air space from the coreless rotating electrical machine.

Coreless rotating electrical machine comprising:

• a stator in which a driveshaft is rotatably coupled to a center part of a lid-type mount which fixes one of end faces of an energizeable coreless cylindrical coil cylindrically formed using a laminate structure consisting of a few overlapping conductive metal sheets, in such a manner that each sheet is covered by insulating layer, with a plurality of line parts being spaced in longitudinal direction;
• a rotor consisting of an intermediate mount coupled to an intermediate part of the driveshaft which penetrates the center part of the lid-type mount, an inner cylindrical air-channel forming body integrally mounted to an outer surface of the intermediate mount, and magnets equipped on an outer surface of the inner cylindrical air-channel forming body;
• a second rotor consisting of a cup-type mount comprising an outer cylindrical air-channel forming body which is constructed such that it is opposingly positioned with respect to the lid-type mount to form a first air space which forms an air gap between an inner cylindrical air-channel forming body and configured to close another end face of the cylindrical coil arranged in the first air space leaving a clearance, wherein, the driveshaft rotatably coupled to the center part of the lid-type mount is rotatably coupled to an end part which penetrates a center part of the intermediate mount;
• a second air space positioned on inner surface side of the cylindrical coil, formed between ones of end faces of the inner cylindrical air-channel forming body and the outer cylindrical air-channel forming body and the lid-type mount;
• and a third air space positioned on outer surface side of the cylindrical coil,
• wherein,
• a means for feeding or intaking cooling medium or cooling air into the second air space is further provided, in such a manner that the cooling medium or cooling air is passed inside and outside of the cylindrical coil arranged in the first air space and is discharged from the third air space.

Coreless rotating electrical machine comprising:

• a stator in which a driveshaft is rotatably coupled to a center part of a lid-type mount which fixes one of end faces of an energizeable coreless cylindrical coil cylindrically formed using a laminate structure consisting of a few overlapping conductive metal sheets, in such a manner that each sheet is covered by insulating layer, with a plurality of line parts being spaced in longitudinal direction;
• a rotor consisting of a cup-type mount comprising an outer cylindrical air-channel forming body which is opposingly positioned with respect to the lid-type mount coupled to an end part of the driveshaft which penetrates the center part of the lid-type mount and configured to close another end face of the cylindrical coil leaving a clearance;
• and magnets equipped on an inner surface of the outer cylindrical air-channel forming body;
• a second rotor consisting of an intermediate mount rotatably coupled, between the lid-type mount and the cup-type mount, to an intermediate part of the driveshaft which penetrates the center part of the lid-type mount;
• and an inner cylindrical air-channel forming body integrally mounted to an outer surface of the intermediate mount and arranged to form a first air space which forms an air gap between the outer cylindrical air-channel forming body integrated with the cup-type mount;
• a second air space positioned on inner surface side of the cylindrical coil and formed between ones of end faces of the inner cylindrical air-channel forming body and the outer cylindrical air-channel forming body and the lid-type mount;
• and
• a third air space positioned on outer surface side of the cylindrical coil,
• wherein,
• a means for feeding or intaking cooling medium or cooling air into the second air space is provided, in such a manner that the cooling medium or cooling air is passed inside and outside of the cylindrical coil arranged in the first air space and is discharged from the third air space.