US 9,812,937 B2
Permanent magnet laminated motor with axial spacer ring vents
Moquan Chen, Shanghai (CN); Bingyi Zhang, Shanghai (CN); and Lehan Wei, Shanghai (CN)
Assigned to Lehan Wei, Shanghai (CN)
Appl. No. 14/425,952
Filed by Lehan Wei, Shanghai (CN)
PCT Filed Aug. 16, 2013, PCT No. PCT/CN2013/081635
§ 371(c)(1), (2) Date Mar. 4, 2015,
PCT Pub. No. WO2014/036883, PCT Pub. Date Mar. 13, 2014.
Claims priority of application No. 2012 1 0324131 (CN), filed on Sep. 4, 2012.
Prior Publication US 2015/0229193 A1, Aug. 13, 2015
Int. Cl. H02K 16/00 (2006.01); H02K 21/24 (2006.01); H02K 1/27 (2006.01)
CPC H02K 16/00 (2013.01) [H02K 1/2793 (2013.01); H02K 21/24 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A permanent magnet laminated motor comprising:
a pair of end plates disposed in a parallel relationship to one another;
a rotating shaft rotatably disposed between said pair of end plates;
n+1 rotor units and n spacer rings fixably attached and sleeved orderly on the outer rim of said rotating shaft and axially compacted on said rotating shaft with said n+1 rotor units and said n spacer rings being alternating one another on said rotating shaft;
a pair of magnetic conductive rings sleeved on the outer rim of said rotating shaft and attached to the outer side of the outermost two of said n+1 rotor units respectively; and
n stator units respectively sleeved on the outer rims of said spacer rings correspondingly and defining an axial air gap between each of said n stator units and the adjacent rotor unit with said axial air gap being the same between each of said n stator units and the adjacent rotor unit and said n stator units being axially fixably attached to said pair of end plates by a plurality of installation screws;
wherein each of said n+1 rotor units includes:
a rotor disc defining 2p axial through-holes uniformly distributed in a pitch circle on an end plane of said rotor disc; and
2p magnets respectively embedded in said axial through-holes with the magnetizing directions of the 2p magnets being parallel to said rotating shaft and the polarities of said 2p magnets being arranged alternately along said pitch circle;
wherein the corresponding magnets among said n+1 rotor units are aligned to each other along the extension direction of said rotating shaft and the magnetic field lines of the aligned magnets have the same direction with n and p being natural numbers;
wherein an end of said rotating shaft includes a backboard perpendicular to and integrated with said rotating shaft and the outer rim of the other end of said rotating shaft including a screw thread and said magnetic conductive rings and said n+1 rotor units and said spacer rings and said backboard being axially compacted into a whole by a locknut;
a plurality of axial backboard vents being uniformly distributed on the same circumference of a circle on an end face of said backboard;
a plurality of axial rotor vents being uniformly distributed on the same circumference of a circle on an end face of said rotor disc;
a plurality of axial magnetic conductive ring vents being uniformly distributed on the same circumference of a circle on an end face of each of said magnetic conductive rings;
a plurality of axial spacer ring vents being uniformly distributed on the same circumference of a circle on an end face of each of said spacer rings, and a plurality of radial spacer ring vents interconnected with said axial spacer ring vents distributed on the outer rim of each of said spacer rings; and
a plurality of axial end plate vents being uniformly distributed on an end face of the end plate.