US 12,107,485 B2
Permanent magnet motor with air and water mixed cooling system
Wenming Tong, Liaoning (CN); Shengnan Wu, Liaoning (CN); Fengge Zhang, Liaoning (CN); Hongkui Zhang, Liaoning (CN); and Jianguo Jia, Liaoning (CN)
Assigned to Shenyang University of Technology, Shenyang (CN)
Filed by SHENYANG UNIVERSITY OF TECHNOLOGY, Liaoning (CN)
Filed on Dec. 23, 2023, as Appl. No. 18/395,491.
Claims priority of application No. 202211680595.0 (CN), filed on Dec. 27, 2022.
Prior Publication US 2024/0213852 A1, Jun. 27, 2024
Int. Cl. H02K 9/193 (2006.01); H02K 1/278 (2022.01); H02K 3/28 (2006.01); H02K 3/48 (2006.01); H02K 5/20 (2006.01); H02K 9/10 (2006.01)
CPC H02K 9/193 (2013.01) [H02K 1/278 (2013.01); H02K 3/28 (2013.01); H02K 3/48 (2013.01); H02K 5/203 (2021.01); H02K 9/10 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A permanent magnet motor with an air and water mixed cooling system, wherein the permanent magnet motor comprises a stator core, armature windings, a rotor core, a sheath, a permanent magnet, a rotating shaft and a casing, wherein the rotor core is arranged on the rotating shaft, the permanent magnet is fixed on a surface of the rotor core, the sheath is fixed on a surface of the permanent magnet, the stator core is fixed on the casing, an air gap is formed between the stator core and the sheath, and end covers are installed at both ends of the casing and are closely attached to the casing;
an inner circumference of the stator core is provided with a plurality of stator slots along a circumferential direction, the armature windings are arranged in the stator slots, an outer circumference of the stator core is provided with a plurality of axial ventilation channels along an axial direction, and the outer circumference of the stator core is provided with a radial ventilation channel along a radial direction, the radial ventilation channel is communicated with the axial ventilation channels, and the radial ventilation channel is in contact with the rotor core, and stator water-cooling discs are arranged at both ends of the stator core; the casing is provided with an air inlet, a plurality of air outlets, casing water-cooled water inlets and casing water-cooled water outlets, the air inlet is communicated with the radial ventilation channel, and the plurality of air outlets are communicated with the axial ventilation channels, and the casing water-cooled water inlets and the casing water-cooled water outlets are both communicated with the stator water-cooling discs;
each of the stator water-cooling discs comprises an annular structure at an outer side and warping pieces arranged in a sequential array at an inner side, and the warping pieces correspond to the armature windings one by one, an outer-ring water channel is opened inside the annular structure, and U-shaped inner-ring water channels, communicated with each other, are opened inside the warping pieces, and a water inlet and a water outlet being opposite are opened on an outer circumference of the annular structure, the water inlet and the water outlet are communicated with and correspond to the casing water-cooled water inlets and the casing water-cooled water outlets of the casing, the outer-ring water channel and the inner-ring water channels are respectively communicated at the casing water-cooled water inlets and the casing water-cooled water outlets, U-shaped inner-ring water channels are not opened inside the warping pieces corresponding to the water inlet and the water outlet, the outer-ring water channel and the inner-ring water channels form a double parallel waterway structure;
each of the armature windings accounts for 65% to 75% of a space in each of the stator slots, and a rest of the space is for each of in-slot air channels, each of the in-slot air channels accounts for 25% to 35% of the space, and the in-slot air channels are communicated with the axial ventilation channels through the air gap.