US 12,218,558 B2
Motor assembly for linear direct-drive motor
Bingnan Wang, Cambridge, MA (US); Hongyu Wang, Cambridge, MA (US); and Yusuke Sakamoto, Tokyo (JP)
Assigned to Mitsubishi Electric Research Laboratories, Inc., Cambridge, MA (US)
Filed by Mitsubishi Electric Research Laboratories, Inc., Cambridge, MA (US); and Mitsubishi Electric Corporation, Tokyo (JP)
Filed on Mar. 8, 2022, as Appl. No. 17/653,993.
Prior Publication US 2023/0291294 A1, Sep. 14, 2023
Int. Cl. H02K 41/03 (2006.01); B65G 23/23 (2006.01); B65G 54/02 (2006.01); H02K 1/2783 (2022.01); H02P 25/064 (2016.01)
CPC H02K 41/033 (2013.01) [H02K 41/031 (2013.01); B65G 23/23 (2013.01); B65G 54/02 (2013.01); B65G 2811/095 (2013.01); H02K 1/2783 (2022.01); H02P 25/064 (2016.02)] 11 Claims
OG exemplary drawing
 
1. A motor assembly including a mover assembly configured to slide during an operation of the motor assembly along magnets forming inner walls of a stator, the mover assembly comprising:
a non-ferromagnetic core with a U-shaped profile of an outer surface having a first and second flat sections arranged parallel to each other, and a third flat section arranged perpendicularly to and intersecting with the first and second flat sections;
a first and second ferromagnetic laminated structures arranged on the first and second flat sections, wherein each of the first and second laminated structures includes a plurality of ferromagnetic plates extending perpendicularly to corresponding first and second flat sections;
another non-ferromagnetic core with a rod shape arranged in a gap defined between the first flat section and the second flat section and opposite to the third flat section, and having a first projection and a second projection slidably inserted into a corresponding first groove and a second groove of the non-ferromagnetic core;
a third ferromagnetic laminated structure disposed on the another non-ferromagnetic core, wherein the third ferromagnetic laminated structure is arranged isolated from the first and second ferromagnetic structures, wherein the third ferromagnetic laminated structure lies on a plane that intersects parallel planes on which first and second ferromagnetic laminated structures lie; and
windings of wire wrapped around the three ferromagnetic laminated structures and the non-ferromagnetic core.