US 12,305,602 B2
Hybrid excitation starter for internal combustion engine
Shujie Zhu, Beijing (CN); Bertram Fang, Beijing (CN); Sunshine Qin, Beijing (CN); Bill Wang, Beijing (CN); and Will Zhang, Beijing (CN)
Assigned to PRESTOLITE ELECTRIC (BEIJING) LIMITED, Beijing (CN); and PRESTOLITE ELECTRIC (WEIFANG) LIMITED, Weifang (CN)
Appl. No. 18/015,590
Filed by Prestolite Electric (Beijing) Limited, Beijing (CN); and Prestolite Electric (Weifang) Limited, Weifang (CN)
PCT Filed Jul. 17, 2020, PCT No. PCT/CN2020/102611
§ 371(c)(1), (2) Date Jan. 11, 2023,
PCT Pub. No. WO2022/011666, PCT Pub. Date Jan. 20, 2022.
Prior Publication US 2023/0250785 A1, Aug. 10, 2023
Int. Cl. F02N 11/08 (2006.01); H02K 21/26 (2006.01)
CPC F02N 11/0803 (2013.01) [H02K 21/26 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hybrid excitation starter, wherein comprising a machine housing, an armature, and an electrical excitation structure and a permanent magnet structure provided in the machine housing, the armature and the machine housing are coaxially arranged, magnetic paths of the electrical excitation structure and the permanent magnet structure are coupled in a direction of normal coupling of permanent magnet magnetic paths, the electrical excitation structure comprises a plurality of electrical excitation magnetic poles and excitation coil windings, the electrical excitation magnetic poles are uniformly mounted on the machine housing corresponding to the armature and air gaps are formed between the electrical excitation magnetic poles and the armature, each of the electrical excitation magnetic poles is provided with the excitation coil windings respectively, the permanent magnet structure comprises a plurality of permanent magnet magnetic poles, and the permanent magnet magnetic poles are provided corresponding to the electrical excitation magnetic poles respectively, and are mounted on the machine housing or the electrical excitation magnetic poles respectively, and a magnetic potential formed by coupling the electrical excitation magnetic poles and the permanent magnet magnetic poles together forms a closed magnetic flux linkage by means of the machine housing, the armature and the air gaps, magnetic fields of the electrical excitation magnetic poles and the permanent magnet magnetic poles are in the same direction, thereby controlling the speed characteristic and the torque characteristic of no-load and/or load operation of the starter by independently adjusting parameters of the excitation coil winding.