US 12,395,058 B2
Frame-type bilateral reverse permanent magnet direct current linear motor
Ping Ma, Guangzhou (CN); Heng Ding, Guangzhou (CN); Tengfei Deng, Guangzhou (CN); Hao Chen, Guangzhou (CN); Hongda Zhao, Guangzhou (CN); Xinghua Wang, Guangzhou (CN); and Yongsheng Ye, Guangzhou (CN)
Assigned to Guangdong University of Technology, Guangzhou (CN)
Filed by Guangdong University of Technology, Guangzhou (CN)
Filed on Apr. 13, 2023, as Appl. No. 18/299,924.
Claims priority of application No. 202210924653.3 (CN), filed on Aug. 2, 2022.
Prior Publication US 2024/0048037 A1, Feb. 8, 2024
Int. Cl. H02K 41/035 (2006.01); H02K 1/17 (2006.01); H02K 1/34 (2006.01)
CPC H02K 41/035 (2013.01) [H02K 1/17 (2013.01); H02K 1/34 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A frame-type bilateral reverse permanent magnet direct current linear motor, comprising:
a support frame, an iron yoke assembly disposed on the support frame, a permanent magnet group, a coil winding, and a pole piece assembly;
wherein the iron yoke assembly comprises: a first iron yoke, a second iron yoke and a middle iron yoke; the first iron yoke, the second iron yoke and the middle iron yoke are disposed in parallel pairwise; permanent magnets of the permanent magnet group are disposed between the first iron yoke and the middle iron yoke and between the second iron yoke and the middle iron yoke; pole pieces of the pole piece assembly are disposed on surfaces of the permanent magnets; and the coil winding is sleeved on the middle iron yoke;
the frame-type bilateral reverse permanent magnet direct current linear motor further comprising:
a plurality of intermediate transition permanent magnet assemblies, disposed between the first iron yoke and the middle iron yoke and between the second iron yoke and the middle iron yoke;
wherein the plurality of intermediate transition permanent magnet assemblies are two groups of intermediate transition permanent magnet assemblies, one group of intermediate transition permanent magnet assemblies are disposed on two sides of a region between the first iron yoke and the middle iron yoke and serve as first intermediate transition permanent magnet assemblies, and the other group of intermediate transition permanent magnet assemblies are disposed on two sides of a region between the second iron yoke and the middle iron yoke and serve as second intermediate transition permanent magnet assemblies;
wherein each of the plurality of intermediate transition permanent magnet assemblies comprises a transition permanent magnet and transition connection iron yokes respectively disposed on two sides of the transition permanent magnet, and the transition connection iron yokes respectively disposed on the two sides of the transition permanent magnet of each of the plurality of intermediate transition permanent magnet assemblies are located between the first iron yoke and the middle iron yoke or between the second iron yoke and the middle iron yoke; and a magnetic pole orientation of the transition permanent magnet of each of the first intermediate transition permanent magnet assemblies is reverse to a magnetic pole orientation of the transition permanent magnet of each of the second intermediate transition permanent magnet assemblies;
wherein the permanent magnets of the permanent magnet group comprise four permanent magnets respectively being a first permanent magnet, a second permanent magnet, a third permanent magnet and a fourth permanent magnet; the first permanent magnet is arranged opposite to the second permanent magnet, and magnetic poles on respective surfaces of the first permanent magnet and the second permanent magnet facing towards each other are different; the third permanent magnet is arranged opposite to the fourth permanent magnet, and magnetic poles on respective surfaces of the third permanent magnet and the fourth permanent magnet facing towards each other are different; and the first permanent magnet is disposed on the first iron yoke, the second permanent magnet is disposed on the middle iron yoke, the third permanent magnet is disposed on the middle iron yoke, and the fourth permanent magnet is disposed on the second iron yoke; and
wherein a set of bilateral reverse uniform magnetic fields are formed between the first iron yoke and the middle iron yoke and between the second iron yoke and the middle iron yoke.