Driving motor with asymmetric magnetic pole type of permanent magnet and claw pole electric excitation for electric automobile

Patent metadata

Field	Value
Publication number	US-11323014-B2
Application number	US-202017045122-A
Country	US
Kind code	B2
Filing date	Mar 31, 2020
Priority date	Apr 23, 2019
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

The disclosure discloses a driving motor with an asymmetrical magnetic pole type of permanent magnet and claw pole electric excitation for an electric automobile which includes a front end cover, a rear end cover, a housing, an asymmetric magnetic pole type of permanent magnet rotor, a claw pole electric excitation rotor, and a stator. Wherein the asymmetric magnetic pole type of permanent magnet rotor is provided with first magnetic pole groups and second magnetic pole groups, the first magnetic pole groups and the second magnetic pole groups are of an asymmetric structure, polarities of outer sides of the first magnetic pole groups and the second magnetic pole groups are distributed in a manner of N poles and S poles arranged at intervals. A utilization of inner space of the motor rotor can be improved, the performance of the motor is improved, and the costs of the motor are reduced.

First claim

What is claimed:

1. A driving motor with an asymmetrical magnetic pole type of permanent magnet and claw pole electric excitation for an electric automobile comprising a front end cover ( 2 ), a rear end cover ( 9 ), a housing ( 5 ), an asymmetric magnetic pole type of permanent magnet rotor, a claw pole electric excitation rotor, and a stator ( 6 ), wherein
the asymmetric magnetic pole type of permanent magnet rotor comprises a shaft ( 1 ), first rectangular permanent magnet steels ( 3 ), second rectangular permanent magnet steels ( 4 ), a rotor core ( 7 ), first magnetic isolation air gaps ( 8 ), and second magnetic isolation air gaps ( 10 ), wherein an even number of magnetic pole groups are uniformly distributed on the rotor core ( 7 ) along a circumferential direction, and magnetic pole groups include first magnetic pole groups and second magnetic pole groups, and polarities of outer sides of the first magnetic pole groups and the second magnetic pole groups are distributed in a manner of N poles and S poles arranged at intervals;
the first magnetic pole group includes two first rectangular permanent magnet steels ( 3 ), one second rectangular permanent magnet steel ( 4 ) and two first magnetic isolation air gaps ( 8 ), and the second magnetic pole group includes one second rectangular permanent magnet steel ( 4 ) and two second magnetic isolation air gaps ( 10 ); a pole arc of the first magnetic pole group is smaller than the pole arc of the second magnetic pole group; the first rectangular permanent magnet steel ( 3 ) is of a non-radial structure;
a distance between outer ends of the two first rectangular permanent magnet steels ( 3 ) is greater than a distance between inner ends of the two first rectangular permanent magnet steels ( 3 ), and the two first rectangular permanent magnet steels ( 3 ) are of an axisymmetric structure;
the second rectangular permanent magnet steel is of a tangential structure and is symmetrical about a diameter, and a distance between a center of the second rectangular permanent magnet steel ( 4 ) and a center of a rotating shaft is smaller than that between a center of the first rectangular permanent magnet steel ( 3 ) and the center of the rotating shaft, and the distance between the center of the second rectangular permanent magnet steel ( 4 ) and the center of the rotating shaft is larger than that between an inner end of the first rectangular permanent magnet steel ( 3 ) and the center of the rotating shaft; a length of the second rectangular permanent magnet steel ( 4 ) in the direction perpendicular to a diameter direction is ⅓˜½ of a length between the inner ends of two adjacent first rectangular permanent magnet steels ( 3 ) in adjacent first magnetic pole groups;
the two first magnetic isolation air gaps ( 8 ) are respectively arranged at a left end and a right end of the second rectangular permanent magnet steel ( 4 ) in the first magnetic pole group, a cross section of the first magnetic isolation air gap ( 8 ) is a right triangle, one end of the first magnetic isolation air gap ( 8 ) is communicated with the second rectangular permanent magnet steel ( 4 ), and the other end of the first magnetic isolation air gap ( 8 ) is not communicated with the first rectangular permanent magnet steel ( 3 );
the second magnetic isolation air gaps ( 10 ) are respectively arranged between the inner end of the first rectangular permanent magnet steel ( 3 ) and the left end and the right end of the second rectangular permanent magnet steel ( 4 ) in the second magnetic pole group, the second magnetic isolation air gap ( 10 ) is communicated with the first rectangular permanent magnet steel ( 3 ), the second magnetic isolation air gap ( 10 ) is not communicated with the second rectangular permanent magnet steel ( 4 ), and the rotor core ( 7 ) is press-fitted on the shaft ( 1 ).

Assignees

• Univ Shandong Technology

Inventors

• Zhang Xueyi
• Hu Wenjing
• Lei Yulong
• Wang Shanjian
• Yin Hongbin
• Geng Huihui

Classifications

• H02K1/2766 Primary

  having a flux concentration effect · CPC title

• H02K16/02

  Machines with one stator and two {or more} rotors · CPC title

• Y02T10/64

  Electric machine technologies in electromobility · CPC title

• H02K21/044 Primary

  Rotor of the claw pole type · CPC title

• H02K1/276

  Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] · CPC title